Manifold Air Temperature Sensor

[rlearp]

Does anyone know the voltage range of the manifold air temperature sensor used on SE through S4s Esprits? I'm looking for the range, and if possible, the temperatures that correspond to each voltage. I might could get this from FreeScan, but my car is laid up at the moment and I can't plug it in. Any information out there?

Thanks,
Ron

[jk1]

Ron,

Check your email

Jim

[rlearp]

Thanks much!!! That tells me what I need to know to attempt what I want to try.

I am so tired of this engine management system pulling boost whenever it feels based on intake air temperature. Yes, it is safe, but the settings are ULTRA conservative. Plus, there is a knock sensor anyhow to catch bad things before they happen as well.

So, I'm going to monitor it and find where the blasted cutoff is, then build a circuit to taylor the sensor output the way I want. Let you know how it goes and if it works I'll tell you what to get to do your own.

Ron

[Dr.Hess]

Ron,
Instead of spoofing the computer, why not just get a different computer or get some custom code on the current one? I am sure that Squelch or Marcus could custom program you a chip that had whatever parameters you wanted and probably for less than building a spoofer once you consider your time and the potential dangers of a mis-calculation. And if you really want to DIY, build a MegaSquirt/MegaJolt or something and you can have complete control yourself.

Dr.Hess

[rlearp]

I have a water injection system that I've built as well, no trouble there, it can do the job of keeping temps down. And, we could go the complete engine control unit outselves too. But my beef is the thing is just too aggressive and should calm down, for lack of better terms. I know why it is there, to keep that little motor happy so that it won't ingest any high temps leading to detonation.

I've been working with some folks on doing the chips but this does not appear to be something that you can just change a valve for and poof it goes away. At least, that is what I think. I can do some basic things to chips like change the boost level, fan temps, etc. but I've not figured this out at all. Markus or someone might know and if they do please chime in, but I do not know how to do it.

>> Edited by rlearp on Thursday 23 September 16:53

[Squelch]

To anyone interested..

Want Block learn turned off ?
Different Fan temps ?
Re Calibrate the wheel speed input ?

Or would you like the entire fuel or igntion map retuned ?

WC Engineering can make any change that you desire to the S4s code. Other than raising the rev limit above 7600 RPM's (this would require a complete rewrite of the code)

We also will not make changes that are outside of the proper operating range of the sensors.

[rlearp]

>> Edited by rlearp on Friday 24th September 17:20

>> Edited by rlearp on Friday 24th September 17:21