Newbie here with some big S300 questions...

[doo0T!doo0T!]

Hi I'm from New Zealand and have an '89 EF7 CRX track-car currently running a turbocharged d16a6/dohc ZC hybrid (zc dohc head on a6 block) controlled with a OBD0 PM7 ECU and two piggy-back units, a turbolink (ignition and boost) and a Gizzmo cam FC (fuel).
The engine management is terrible, the piggy backs dont talk to each other and i dont like it at all.

So i am about to do it properly and ditch it all and upgrade to a Hondata S300 and convert the car to OBD1 but first I have a few questions.

1. Can I use a JDM P29 ECU with the Hondata components? (It is the OBD1 version of the PM7 tune which is used in JDm EG5 civics to run the OBD1 dohc ZC)

2. Can the JDM square-case P29 be modified for boost control?

Here is a pic of the guts of the P29 ecu if you can tell by just looking at it.....



3. If the P29 can not be used, can i run a USDM ecu, say a P28 in my JDM car? Could I buy one on e-bay in the US, have it sent to Hondata for the boost modification and fitting and then get it mailed to me in NZ?

4. Can I use a 3-port Denso boost control solenoid from a WRX Subaru with the S300? (it is an earth-switched device not power-activated)


5. Or would it be easier to avoid the S300 boost control and use an external boost contoller?
I kind of want to keep it simple as possible though and I'm not keen on a whole raft of controllers like I have now. I like the KISS theory :)

6. I have read about the S300 having dual tables for different octane fuels and both hot and cold boost settings, can these functions be used instead to have two selectable boost limits for road and race driving or is it best to upload the appropriate tune prior to driving it with Smanager depending on how and where the car would be driven. (it is still road-registered and road legal and I dont want to be giving it 25psi of boost during transit or road use in traffic ;) )
Ideally i want two settings, low-boost economy and high-boost high-power.

7. Is a MAC OS10 version of SManager planned for the near future?

8. I have an OBD1 distributer already so thats ok but I was wondering about the OBD1 o2 sensor, apparently hondata use a 4 wire pre-heated but the OBD1 P29 ZC just uses a single wire. Will this be ok with the S300 or will i ned to adapt a 4-wire sensor off a B16a?

9. I plan to retain the OBD0 resistor pack as i am using 560cc mitsubishi EVO 8 injectors. Will plugging a OBD0 to OBD1 harness converter work fine with the resister box or will I have to take it off and use high impedence injectors off somthing else?

Sorry for all the questions!

Here is the car for interests sake.

[doo0T!doo0T!]

I think I've just answered one of my own questions....

All US ECUs have the circuitry, but not components, for the PWM (pulse width modulated) output. JDM ECUs do not have the circuitry and cannot be used.

Looks like I either have to use a USDM ecu or an external boost controller.

What do you guys recommend?
Have the S300 do it or give the job to a Profec-B or somthing?

On the subject of Boost controllers then why are some so much more expensive than others? What can a $650 profec-b do that a $150 HDi cant do?

[Spunkster]

You need a USDM ecu or a JDM PR3 OBD1 ecu to use the s300 with boost control.

For your purposes, the GM solenoid should work fine.

I can't answer the injector question as I know nothing about these injectors.

[doo0T!doo0T!]

You need a USDM ecu or a JDM PR3 OBD1 ecu to use the s300 with boost control.

For your purposes, the GM solenoid should work fine.

I can't answer the injector question as I know nothing about these injectors.

Ok so if I cant get a PR3 cheap enough is the S300 still going to work just as well in a boosted set-up with a quality external boost controller?

And is the P29 compatible with the S300? (if I forget about boost control)

I have the denso solenoid right here to use. Do you know if the GM one is earth-switched as well? because if it is my Denso one should work fine.

Any light on question 6? Like If I was to get the PR3 and have the S300 control boost will it allow me to easily change the boost limit on the fly?
Or is that somthing only an external controller can do?

And are there any Mac versions of SManager planned?

[doo0T!doo0T!]

OK dont worry about it, I got a mate with a windows PC to download it for me to take a look at.
This screen shot answers most my boost control related questions.

By the looks of it I can use one of the listed inputs to switch boost on the fly, thats all i was after.
Also looks like I can use either earth-switched or power-switched boost solenoids by checking or unchecking a box so should be no problems with my denso solenoid.
No one here in NZ seems interested in supplying an ECU modified for boost so I will try to import one privately from one of the listed US based Hondata agents using a USDM P28 ecu.

[nitttrous]

i have had s300 in my civic and i bought a new laptop and haveing problums with my reaction speed with vista it seems like it cant keep up with my car any answers would be great

[Spunkster]

There are no software settings for speed of datalogging. You more than likely just have a lot of background applications running that are causing the computer to slow down. Try disabling som e background applications and things that start automatically.