will this work as a map sensor?

[weltall]

it would hook up similar to the replace ment you guys already offer
i already have one from my greddy profec e01 and im thinking if i spliced it into the stock map sensor hrnss it could possibly work
mine looks just like the ones you offer as replacement 3 bar map sensor
this one looks slightly redesinged in shape only
here is the specs on it including the psi based voltage

http://www.mohdparts.com/emanage/pressu ... index.html

i just wanna know cause i dont wanna buy a new one if this works and if you can tell me how to hook it up possibly

thanks

[Hondata]

It is a 4 bar MAP sensor, and should work. Be aware that the Greddy specs are given in relative pressure, not absolute.

[weltall]

so this would just splice into the factory harness?


do the ones you offer just clip right in?
how exactly does the replacemnet map sensor get installed?

[Spunkster]

http://www.hondata.com/tech3barmap.html

[weltall]

http://www.hondata.com/tech3barmap.html

so if the voltage does match the requirements of the 3bar it will work

so now my question is since this is a 4bar map sensor will the voltage be different comparing the two at the same boost level?

like at 10 psi the 3bar will be at oh say 10vdc
and the greddy one at 10 psi will say like 8.5?

see what i mean

i just dont wanna be at 15 psi but the map only reports 10 psi to the ecu

i fixed the link to the greddy specs

here it is
http://www.mohdparts.com/emanage/pressu ... index.html

[Hondata]

Warning: there is a learning curve for you ahead that may be quite steep.

If you set the scalar and offset for the 4 bar MAP sensor correctly, then the ECU will read 15 psi when the motor sees 15 psi. Before you ask how to calculate the scalar and offset, the KManager help file has instructions for this and there is a post on this forum explaining to process.

[weltall]

the greddy saya it only reads to 43 psi (wouldnt that be a 3 bar then)

it is just the voltage that is wrong and from what you told me there is a possibility that i can adjust the voltage so that the ecu will see this the same as the ones you recomend (just it would be too much trouble figuring it out than rather just buying the new map form you)

i may just buy the map
do i get it through you? and do you have a link to where i can buy
i looked on the site and all i can find is a price list


i may just get the one you offer rather than trying to ghetto rig something that may not work and possibly being out more money than just buying the suggested one

[Hondata]

You need to understand absolute pressure vs relative pressure. Basically the units and measure system in common use in the non-metric part of the world is backwards.

Relative pressure is measured from atmospheric pressure. Most people think in terms of relative pressure. Eg 10 psi of boost is 10 psi above atmospheric. The same applies to vacuum. 10 inches of vacuum is 10 inches of mercury below atmospheric.

Absolute pressure is measured from vacuum. From an engineering point of view it is much better to work with absolute pressure. 10 psi of boost is actually 24.5 psi of absolute pressure. Likewise 10 inches of vacuum is actually 66 kPa of pressure. MAP sensors are rated in absolute pressure (MAP = Manifold Absolute Pressure). A 3 bar MAP sensor can read 3 x 14.5 = 43.5 psi of pressure, or around 30 psi of boost using backwards terminology.

The Greddy MAP sensor can read 43.5 psi of boost, which is actually 58 psi absolute pressure, or 4 bar. If you convert the Greddy figures to absolute mbar, you get 0 mbar = 0.5V and 4000 mbar = 4.5V. In KManager use a scalar of 1000 mbar/volt and an offset of -500 mbar and the MAP sensor should work fine.

[weltall]

cool you guys rock (i actually learned alot from this)

so setting the scalar like this will make me have 4 bar capabilites?
or just a converted (sorta) 3 bar?

thanks