Ok i have a dumb question, that ive searched and seen nothing about. Its well known that the tbi uses the 160 baud rate and the tpi uses 8192? i think, well i have a tbi motor going in but i want to do the datalogging with the 8192 baud rate tpi ecm can i burn my own chip for the tpi ecm to run a tbi motor?

Yes.
But, you need to use an ecm that will handle the TBI injectors. So your limited to the 1227749. Then wire it up like it's used in the Sunbird application.

You'll need to add an actual MAT sensor to get it correct.

I've done it, but it was years ago. There is a difference in the injector firing strategy, but from limited playing I got to do with it, it didn't seem to matter. But, I was using a regular single plane manifold.

I'm surprised, the TBI crowd's never really played with this notion.

If you use the Syclone code.
Using the Sy code will allow you to actually use the MAT for more accurate fuel and timing.

so i actually came up with a decent idea? yah i think. What is a MAT sensor i've heard of the MAF and MAP for tpi cars is it the manifold air temp sensor? by chance? if anyone else has done it let me know please! thanks everyone

You guessed right. The MAT data allows the ECM to put more fuel in for colder air and less for warmer, so you maintain your target AFR.

And it looks like you got so excited, you overlooked the fact that His Grumpiness has done it before. Now see if you can find something he hasn't.

John

i'm working on it lol im only 19 i have many years to learn still just got into the stuff this year. but with the autoprom capability's with this chip on a tbi it will be sweet! im just hoping to find a job that has decent pay. can't live on $7.50 an hour and still have goodies.

Now that's a worth while ambition....

BTW, I have to say the Syclone code, from my point of view, is about the neatest thing there is.
Some of the stuff takes a bit of a nack to get, but the way the AE, and DFCO is, leaves little to be desired.

lol your speaking gibberish to me! but im gonna attempt it.

AE = Acceleration Enrichment, which is the transient way the ECM increases fuel to stop the flat spot you'd get when you put your foot down quickly (like an accelerator pump on a carb).

DFCO = Deceleration Fuel Cutoff, which is the mode the ECM operates in when you drop your foot right off the throttle and run on the overrun, including what to do about the spark timing and how to switch the fuel back on.

Another mode like a non-transient AE is PE (Power Enrichment). Not all ECM's support equivalent forms of these, and some binaries are better than others. That's Grumpy's point.

You'd do well to dig up some lists of abbreviations, and to find some docs like the Sunbird Turbo P4 .PDF that you can Google to in a few spots on the net.

John

you guys are genuises! i still have to wait to get chip burning equipment and datlogging cable. i tried to make one it didnt work, their were to many differences between them so i ordered one through www.customefis.com and i still havent recieved it (that was the 12th of december). if you burn your own proms what hardware devices do you use? programmer? burner? i read the faq btw i just thought someone might have found something cheaper or better since then

where can i get the syclone code? or the Sunbird stuff i need to know? I've looked a little. And where would i mount the MAT? grumpy since your the only one that has done this (as far as i know) maybe you can help me

You haven't really looked until you've at least combed through ftp://www.diy-efi.org

You'll find the Turbo_P4_doc.pdf and the $58t.zip on the uploads directory.

John

wow thats awesome, never seen that before!