I have a few questions about the secondary injectors ECU output.
First, I should explain why I need to know these exact specifications.
This additional output is going to be used to "slave" a water injection solenoid valve specifically designed for this PWM output. The valve has a required operating current of 1 amp. I am not going to drive this solenoid directly from the ECU output . I have a MOSFET PWM high current (5A) intermediate control that will control all the power the solenoid valve should use.
The ECU secondary injectors output will simply be used as a triggering source with less than 40ma current total use.
OK, now to the questions.
1. What is the ECU secondary injectors output able to support current wise?
2. Since this output follows the primary injectors signals (i assume), will this be a batch fire output signal?
Specifically:
Does this output produce a PWM pulse for the #1 injector only? i.e. a PWM pulse every 720 degrees of rotation.
OR, does this output produce a signal for every injector? i.e. a PWM pulse every 180 degrees of rotation.
This is important to know for the water injection volume calibration settings. I assume the PWM signal is generated to match the #1 injector and 720 degree batch firing which would be half the engine RPM. i.e., 7000 RPM would be 3500 PWM pulses at whatever duty cycle % the injector was firing at.
If i have 14000 PWM pulses to deal with (i.e. fires every 180 degrees) i would have to divide the frequency to match the solenoids intended range.
I will shortly be able to use an oscilloscope to gather the exact nature of this output; but i am making bench test apparatus now to duplicate running ECU output for flow testing and such. Your help and information will be greatly appreciated.
Thank you
Secondary Injectors, ECU output specifics/ details
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
1. Is not a simple answer. The injector driver uses a specialized automotive injector IC which varies the output current in order to open the injector using high current without overheating it. See https://www.hondata.com/help/injectordriver/theory.htm
So if you connect the output of the injector driver to an intermediate MOSFET then the output IC will only sense the input impedance of whatever circuit you make, and probably will try to drive the current as high as possible if you have anything other than a very low resistance.
2. The output is not batch but sequential slaved of whatever drives the input (normally the ECU output).
How are you going to vary the water injector duty cycle? Can the water injector solenoid cope with the same frequency & duty cycle as fuel injectors?
So if you connect the output of the injector driver to an intermediate MOSFET then the output IC will only sense the input impedance of whatever circuit you make, and probably will try to drive the current as high as possible if you have anything other than a very low resistance.
2. The output is not batch but sequential slaved of whatever drives the input (normally the ECU output).
How are you going to vary the water injector duty cycle? Can the water injector solenoid cope with the same frequency & duty cycle as fuel injectors?
Hondata
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
Thank you for your response. Lets define some of the criteria and maybe we will come to some good determinations.
I have seen the injector theory pdf .
The thoughts on the ECU injector driving the current as high as possible are not correct. It is not possible for a very high impedance circuit to draw any more than it is physically bound/designed to. (Ohms law). I'm not arguing but hoping to move right past this. In the case of low impedance injectors as you know the circuit must be designed to cope with sudden and high demands for current such as you have described. This has some drawbacks, because inductors (injector coils) will deliver fly back voltage spikes and reverse currents that can destroy a driver circuit not designed for the abuse i.e. protected.
It is the direct instruction of the designer/ manufacturer of this fast acting valve (FAV) to drive it like this. Richard @ Aquamist is a man of few words and leaves one to research the particulars for himself. This is well enough as my background and experience in the field of electronics is broad.
The very same duty cycle the injectors see (PWM), will be the signal that drives the Fast Acting Valve FAV. This is the way that a proportional volume can be achieved across the RPM range that is directly proportional to injector flow: exactly what a water injection system should be able to do in the 21st century. It is just as if an additional fuel injector was being driven to supplement with the secondary ECU driver output. It can be tailored further with S300 programming for desired performance. Also, it can be tailored within the liquid system architecture with various sized water injectors. Honing in on the correct mixture is why bench testing these systems is a must.
I read from your response that the ECU output is sequential slaved. From studying the Hondata injector box I can see no manner of sequentially controlling any additional injectors unless this is a digital output, but shows all signs of being an analog PWM signal. This looks amazingly like a batch fire box unless there are some things that you can share with me to understand your statement. The primary injectors I can find are all separately and therefore sequentially able to operate. A single assigned output from the S300v3 is inherently analog that controls the secondary injector platform, so where is my error in understanding?
Every duty cycle is driven at an optimal frequency for the specific load. What is the Hondata S300 duty cycle frequency for this output?
The FAV manufacturer specifies a duty cycle frequency in the range of 25-50hz. his should be very close if not directly the same as the fuel injectors best range as these valves were designed to operate as such. The problem is knowing the EXACT frequency is important to the FAV flow characteristics. I just may have to see what this is with an oscilloscope but you should have an engineer there that can tell you.
I have left a mouthful. Please be as specific as you can be with your response.
I am really surprised that the S300v3 doesn't have a supplemental water injection platform (yet). Maybe together we can explore some territory for water injector systems implementation. I am willing to share any and all information directly gained from this project.
Thank you
I have seen the injector theory pdf .
The thoughts on the ECU injector driving the current as high as possible are not correct. It is not possible for a very high impedance circuit to draw any more than it is physically bound/designed to. (Ohms law). I'm not arguing but hoping to move right past this. In the case of low impedance injectors as you know the circuit must be designed to cope with sudden and high demands for current such as you have described. This has some drawbacks, because inductors (injector coils) will deliver fly back voltage spikes and reverse currents that can destroy a driver circuit not designed for the abuse i.e. protected.
It is the direct instruction of the designer/ manufacturer of this fast acting valve (FAV) to drive it like this. Richard @ Aquamist is a man of few words and leaves one to research the particulars for himself. This is well enough as my background and experience in the field of electronics is broad.
The very same duty cycle the injectors see (PWM), will be the signal that drives the Fast Acting Valve FAV. This is the way that a proportional volume can be achieved across the RPM range that is directly proportional to injector flow: exactly what a water injection system should be able to do in the 21st century. It is just as if an additional fuel injector was being driven to supplement with the secondary ECU driver output. It can be tailored further with S300 programming for desired performance. Also, it can be tailored within the liquid system architecture with various sized water injectors. Honing in on the correct mixture is why bench testing these systems is a must.
I read from your response that the ECU output is sequential slaved. From studying the Hondata injector box I can see no manner of sequentially controlling any additional injectors unless this is a digital output, but shows all signs of being an analog PWM signal. This looks amazingly like a batch fire box unless there are some things that you can share with me to understand your statement. The primary injectors I can find are all separately and therefore sequentially able to operate. A single assigned output from the S300v3 is inherently analog that controls the secondary injector platform, so where is my error in understanding?
Every duty cycle is driven at an optimal frequency for the specific load. What is the Hondata S300 duty cycle frequency for this output?
The FAV manufacturer specifies a duty cycle frequency in the range of 25-50hz. his should be very close if not directly the same as the fuel injectors best range as these valves were designed to operate as such. The problem is knowing the EXACT frequency is important to the FAV flow characteristics. I just may have to see what this is with an oscilloscope but you should have an engineer there that can tell you.
I have left a mouthful. Please be as specific as you can be with your response.
I am really surprised that the S300v3 doesn't have a supplemental water injection platform (yet). Maybe together we can explore some territory for water injector systems implementation. I am willing to share any and all information directly gained from this project.
Thank you
Re: Secondary Injectors, ECU output specifics/ details
Elements of your response don't make any sense - I don't think you understand what the injector driver box does. In brief:
- Yes, the injector will try to supply the injector as much current as possible for the opening phase. The current is limited by the the internal resistance of the output driver, the current sensing resistor and the impedance of the injector, which is biggest factor in the determination of the current. The context of this is if you are using an additional MOSFET as outlined in your first post you should choose your input impedance carefully. Back EMF is taken care of, but I don't see that it is relevant there.
- Ok, you're trying to drive a 'fast acting valve' with the same frequency and duty of fuel injectors. My point was the only way to alter the water delivery is by the pressure and jet sizes, not the duty as that will be the same as the fuel injectors.
- No, the water PWM can't be altered. It will be the same as the fuel injectors.
- The secondary injectors are slaved to the primary injectors. The primary injectors are sequential. Therefore the secondary injectors are sequential too. It is not batch fire.
- How many water injector channels are you talking about? One or four? Looks like just one, so the whole argument about sequential operation is not relevant as one injector is going to be batch fire.
- What is 'analog PWM signal'. The term does not make sense.
- 'Optimal frequency' for fuel injectors is moot, because if they are sequential then you have to fire them every 720 degrees crank rotation. This is non negotiable. Yes, there are opening and closing time limitations, but you're not driving them at a fixed frequency.
- Now I'll moving into water injection. Why are you injecting water? Is there any need to inject water if it will not have any cooling or detonation prevention benefit? How accurately do you need to match water to fuel delivery? At the bottom end you can use one or more nitrous outputs for detonation suppression under boost. I've done this many times successfully.
Assuming you're not using it already, you could use the boost control output to control one channel of water injection. Frequency can be fixed. Duty can be mapped using the boost tables.
- Yes, the injector will try to supply the injector as much current as possible for the opening phase. The current is limited by the the internal resistance of the output driver, the current sensing resistor and the impedance of the injector, which is biggest factor in the determination of the current. The context of this is if you are using an additional MOSFET as outlined in your first post you should choose your input impedance carefully. Back EMF is taken care of, but I don't see that it is relevant there.
- Ok, you're trying to drive a 'fast acting valve' with the same frequency and duty of fuel injectors. My point was the only way to alter the water delivery is by the pressure and jet sizes, not the duty as that will be the same as the fuel injectors.
- No, the water PWM can't be altered. It will be the same as the fuel injectors.
- The secondary injectors are slaved to the primary injectors. The primary injectors are sequential. Therefore the secondary injectors are sequential too. It is not batch fire.
- How many water injector channels are you talking about? One or four? Looks like just one, so the whole argument about sequential operation is not relevant as one injector is going to be batch fire.
- What is 'analog PWM signal'. The term does not make sense.
- 'Optimal frequency' for fuel injectors is moot, because if they are sequential then you have to fire them every 720 degrees crank rotation. This is non negotiable. Yes, there are opening and closing time limitations, but you're not driving them at a fixed frequency.
- Now I'll moving into water injection. Why are you injecting water? Is there any need to inject water if it will not have any cooling or detonation prevention benefit? How accurately do you need to match water to fuel delivery? At the bottom end you can use one or more nitrous outputs for detonation suppression under boost. I've done this many times successfully.
Assuming you're not using it already, you could use the boost control output to control one channel of water injection. Frequency can be fixed. Duty can be mapped using the boost tables.
Hondata
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
Let me grab onto what you have said last. That seems to be the most significant way to accomplish control of the FAV and gets away from the rabbit trails.
So you have said:
"Assuming you're not using it already, you could use the boost control output to control one channel of water injection. Frequency can be fixed. Duty can be mapped using the boost tables."
You are correct, I am only using one FAV in an individual port application. Again, the water injector sizing is the most practical way to establish system total flow for power output. The total flow for the system matches fuel volume by 15%. The trick with the FAV is that it can control the volume through the water injectors with PWM to make it a progressive flow across the motors needs.
I had wondered about the boost control but did not see a way around not being boosted.
That would be a most excellent form of control. I am not boosted though, I am heavy nitrous injection. I do not understand how I can gain the control without boost. I would be very interested in ANY response as to how this may be accomplished. Please elaborate!!! I would love for it to be that simple. I have to have a very specific frequency for this FAV 25-50hz. On my test bench this FAV only draws .75amps at max frequency. I would not even have to use a MOSFET if this could be set up. The boost control should very easily be able to handle that current.
Adjusting this output from the N/A tables is the question. Please tell me we can do this.
So that you might understand better what I am doing, this proportional water injection system is being placed on a very high output nitrous application.
The three motors I have had built for this project are going to be gradually given greater nitrous volumes when data and tune say it is ready. This is a max effort drag car in it's final form,(3rd motor is Endyn built) and the test car is going to use the two motors to establish tune criteria and system implementation.
Thank you for your response even though it is a holiday weekend. That's dedication man.
So you have said:
"Assuming you're not using it already, you could use the boost control output to control one channel of water injection. Frequency can be fixed. Duty can be mapped using the boost tables."
You are correct, I am only using one FAV in an individual port application. Again, the water injector sizing is the most practical way to establish system total flow for power output. The total flow for the system matches fuel volume by 15%. The trick with the FAV is that it can control the volume through the water injectors with PWM to make it a progressive flow across the motors needs.
I had wondered about the boost control but did not see a way around not being boosted.
That would be a most excellent form of control. I am not boosted though, I am heavy nitrous injection. I do not understand how I can gain the control without boost. I would be very interested in ANY response as to how this may be accomplished. Please elaborate!!! I would love for it to be that simple. I have to have a very specific frequency for this FAV 25-50hz. On my test bench this FAV only draws .75amps at max frequency. I would not even have to use a MOSFET if this could be set up. The boost control should very easily be able to handle that current.
Adjusting this output from the N/A tables is the question. Please tell me we can do this.
So that you might understand better what I am doing, this proportional water injection system is being placed on a very high output nitrous application.
The three motors I have had built for this project are going to be gradually given greater nitrous volumes when data and tune say it is ready. This is a max effort drag car in it's final form,(3rd motor is Endyn built) and the test car is going to use the two motors to establish tune criteria and system implementation.
Thank you for your response even though it is a holiday weekend. That's dedication man.
Re: Secondary Injectors, ECU output specifics/ details
You can run the boost control output without being boosted. However, my mistake, the boost control is by gear & rpm, not by pressure and rpm, so you can't tune the boost control output as you had hoped.
Hondata
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
That simple.
I'm not seeing it? Even the rpm/gear settings seem to require a solenoid activation pressure.
How do I select a boost pressure without boost? Can I put in a different value than boost pressure? That would be great.
Help me to know what must be done as this is very good if it can work this way. Water injection duty cycle by rpm/gear with a fixed frequency that matches my FAV is the next best thing to having a water injection table etc. programed into the S300.
Thank you for your help with this. I sincerely hope it can be done this way.
Even if I have to send in my S300 ECU to have this activation pressure programmed to accept vac settings would be fine.
I'm not seeing it? Even the rpm/gear settings seem to require a solenoid activation pressure.
How do I select a boost pressure without boost? Can I put in a different value than boost pressure? That would be great.
Help me to know what must be done as this is very good if it can work this way. Water injection duty cycle by rpm/gear with a fixed frequency that matches my FAV is the next best thing to having a water injection table etc. programed into the S300.
Thank you for your help with this. I sincerely hope it can be done this way.
Even if I have to send in my S300 ECU to have this activation pressure programmed to accept vac settings would be fine.
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
So is there no specific response as to how to trigger a minimum solenoid activation pressure?
I am quite interested in a response as this project is presently being bench tested and assembled.
I realized from an earlier post that you had said that the ECU output frequency for the injectors was fixed. That is exactly when the light went on and I began to do the math. Funny thing is the associated frequency for RPM was surprisingly useful.
check it out:
1000 rpm divided by 2 (720 degrees of revolution) = 500
500 cycles per minute divided by 60 (seconds per minute) = 8.3 hz or common frequency.
Do this for the entire RPM range and you get:
1000 rpm = 8.3hz
2000 rpm = 16.6hz
3000 rpm = 25hz
4000 rpm = 33hz
5000 rpm = 41hz
6000 rpm = 50hz
7000 rpm = 58hz
8000 rpm = 66hz
The FAV on my bench tests has a response frequency from 10hz to 90hz though the optimum is 35hz. There is much wisdom from Richard @ Aquamist to produce a valve that has this broad operating range. There may be hope yet for the S300v3!
Please respond to your last assertion of the use of the PWM output from the boost tables. This will make the most practical arrangement as the frequency can be fixed.
Thank you for your prompt response.
I am quite interested in a response as this project is presently being bench tested and assembled.
I realized from an earlier post that you had said that the ECU output frequency for the injectors was fixed. That is exactly when the light went on and I began to do the math. Funny thing is the associated frequency for RPM was surprisingly useful.
check it out:
1000 rpm divided by 2 (720 degrees of revolution) = 500
500 cycles per minute divided by 60 (seconds per minute) = 8.3 hz or common frequency.
Do this for the entire RPM range and you get:
1000 rpm = 8.3hz
2000 rpm = 16.6hz
3000 rpm = 25hz
4000 rpm = 33hz
5000 rpm = 41hz
6000 rpm = 50hz
7000 rpm = 58hz
8000 rpm = 66hz
The FAV on my bench tests has a response frequency from 10hz to 90hz though the optimum is 35hz. There is much wisdom from Richard @ Aquamist to produce a valve that has this broad operating range. There may be hope yet for the S300v3!
Please respond to your last assertion of the use of the PWM output from the boost tables. This will make the most practical arrangement as the frequency can be fixed.
Thank you for your prompt response.
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
I was under the impression that we were having a conversation and I was awaiting a response to your suggestion.
It has been a week and if there is another mod or informed individual with Hondata to continue this inquiry, it would be greatly appreciated.
I understand from the lack of post that you may even be on vacation or something. Does only one tech respond on this forum?
It has been a week and if there is another mod or informed individual with Hondata to continue this inquiry, it would be greatly appreciated.
I understand from the lack of post that you may even be on vacation or something. Does only one tech respond on this forum?
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
You can run the boost control output without being boosted. However, my mistake, the boost control is by gear & rpm, not by pressure and rpm, so you can't tune the boost control output as you had hoped.
Hondata
^^^^^^^^^^^^^^^^^^your post.
I am being as professional as one can expect. I am also patient.
I am not however impressed with the lack of serious help from such a developed product that has 10s of thousands of users. Your previous responses have been pointed, defensive and argumentative with no such provocation as I can recall for the same. I have been decent and wishing to stay on topic throughout. I wish only to learn.
Hondata, if you are the only go to for info and avoid the issues and leave cryptic responses that might lead someone to believe there is a way just beyond their reach: well this is playing games. I would not expect this tech support from a product so good.
Being patient just makes my desperation for an answer seem combative.
Tech support like this just induces a call out. I am not the aggressor. Through passivity and inaction you become the aggressor here. My request for correct and exact information still stands and we can move on to better things from here with a response. Step up and help your users.
The question remains: How do I select a solenoid minimum activation pressure without boost?
Can my ECU be programmed to do this by returning it to Hondata?
Hondata
^^^^^^^^^^^^^^^^^^your post.
I am being as professional as one can expect. I am also patient.
I am not however impressed with the lack of serious help from such a developed product that has 10s of thousands of users. Your previous responses have been pointed, defensive and argumentative with no such provocation as I can recall for the same. I have been decent and wishing to stay on topic throughout. I wish only to learn.
Hondata, if you are the only go to for info and avoid the issues and leave cryptic responses that might lead someone to believe there is a way just beyond their reach: well this is playing games. I would not expect this tech support from a product so good.
Being patient just makes my desperation for an answer seem combative.
Tech support like this just induces a call out. I am not the aggressor. Through passivity and inaction you become the aggressor here. My request for correct and exact information still stands and we can move on to better things from here with a response. Step up and help your users.
The question remains: How do I select a solenoid minimum activation pressure without boost?
Can my ECU be programmed to do this by returning it to Hondata?
-
Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
What is the problem with this site?
I can not PM Hondata or Spunkster. It will not let me conduct a conversation in private so I have to post this here. I really want to continue to learn how to use the S300V3 to the fullest and well this is not customer support at all.
This is my first thread and I had hoped to become a productive member.
What is the issue?
I don't want a beef/drama. I just want to learn something.
I can not PM Hondata or Spunkster. It will not let me conduct a conversation in private so I have to post this here. I really want to continue to learn how to use the S300V3 to the fullest and well this is not customer support at all.
This is my first thread and I had hoped to become a productive member.
What is the issue?
I don't want a beef/drama. I just want to learn something.
Re: Secondary Injectors, ECU output specifics/ details
Have you tried setting an activation pressure that is lower than atmospheric pressure?
The person you have been speaking with is out of town for the week.
The person you have been speaking with is out of town for the week.
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
How could I do that?
Can I put a negative in front of the value to represent a vacuum?
I really do not know what the limitations are for the minimum activation pressure. I do however like the by gear adjustment this mapping could offer.
I do have other methods of activation that are more primitive but lack finesse.
Can I put a negative in front of the value to represent a vacuum?
I really do not know what the limitations are for the minimum activation pressure. I do however like the by gear adjustment this mapping could offer.
I do have other methods of activation that are more primitive but lack finesse.
Re: Secondary Injectors, ECU output specifics/ details
The reason I did not respond is that there is nothing further to add to my previous comments. I don't think the s300 can do what you are trying to do, and some of the things don't make sense, like varying the injector output frequency when it must be fixed to the engine speed in order to be sequential. An answer of no is not necessarily bad customer service.
Hondata
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Tyler Dirden
- Posts: 13
- Joined: Sat May 27, 2017 6:53 pm
Re: Secondary Injectors, ECU output specifics/ details
So let me get this straight,
You feel as if you have actually given me an answer?
You have confused the very simple questions from the beginning.
Let me refresh :
From post 1. What is the secondary ECU output able to supply current wise?
"crickets"
LOOK, you are not making a lick of sense. see below, your post
I don't think the s300 can do what you are trying to do, and some of the things don't make sense, like varying the injector output frequency when it must be fixed to the engine speed in order to be sequential.
This is not even an issue. You have made it an issue for no reason I can see. No-one is trying to vary the frequency, in fact as stated earlier the FAV operates best on a fixed frequency of 35hz like I posted. That is why the boost control was a great path.
This is where the worthless comment that you made comes in:
You posted,
You can run the boost control output without being boosted. However, my mistake, the boost control is by gear & rpm, not by pressure and rpm, so you can't tune the boost control output as you had hoped
As I stated all these things were a plus like the FAV control by gear and rpm.
This option also allowed me to have a FIXED frequency through the S300 parameters set up. All plus, plus, plus then you stop replying.
If you don't want to (or can't) answer someones post than by all means (especially if you do not understand how to give an answer or your product). You telling me I can run a boost control output is no answer when you simply stop responding to a specific detail you unwittingly assume we all should just know.
Do you know how to set an activation pressure that is lower than atmosphere?
I'll say it again
How could I do that?
Can I put a negative in front of the value to represent a vacuum?
I really do not know what the limitations are for the minimum activation pressure. I do however like the by gear adjustment this mapping could offer.
Have you even read through my responses to see how I was trying to be at peace with you?
You have got issues.
You feel as if you have actually given me an answer?
You have confused the very simple questions from the beginning.
Let me refresh :
From post 1. What is the secondary ECU output able to supply current wise?
"crickets"
LOOK, you are not making a lick of sense. see below, your post
I don't think the s300 can do what you are trying to do, and some of the things don't make sense, like varying the injector output frequency when it must be fixed to the engine speed in order to be sequential.
This is not even an issue. You have made it an issue for no reason I can see. No-one is trying to vary the frequency, in fact as stated earlier the FAV operates best on a fixed frequency of 35hz like I posted. That is why the boost control was a great path.
This is where the worthless comment that you made comes in:
You posted,
You can run the boost control output without being boosted. However, my mistake, the boost control is by gear & rpm, not by pressure and rpm, so you can't tune the boost control output as you had hoped
As I stated all these things were a plus like the FAV control by gear and rpm.
This option also allowed me to have a FIXED frequency through the S300 parameters set up. All plus, plus, plus then you stop replying.
If you don't want to (or can't) answer someones post than by all means (especially if you do not understand how to give an answer or your product). You telling me I can run a boost control output is no answer when you simply stop responding to a specific detail you unwittingly assume we all should just know.
Do you know how to set an activation pressure that is lower than atmosphere?
I'll say it again
How could I do that?
Can I put a negative in front of the value to represent a vacuum?
I really do not know what the limitations are for the minimum activation pressure. I do however like the by gear adjustment this mapping could offer.
Have you even read through my responses to see how I was trying to be at peace with you?
You have got issues.