Questions on powering a 2.8L turbo with a 729 ECM

F

fisherbody86

New member
First off, this is my first post on SyTy (I've been a thirdgen.org member for years) and also new to tuning. I'm trying to put together a turbo 2.8L for my 88 Fiero, and I'm going to run the 749 ECM for obvious reasons. I have TunerPro, the BBZB 1580 .bin, and the $58 definition file. But where do you change the cylinder displacement? I don't see it anywhere in the def file. Also, could I just basically copy the spark and fuel tables from the stock 88 .bin and plug them in to the BBZB .bin for a starting point. Then just tweak them and play with the boost multiplier tables? I'm not sure that I'm using the correct terminology here, but hopefully you guys understand my questions.

P.S. I won't even THINK of actually burning any chips until I have a better understanding of what I'm doing. I'm reading the P4 doc and searching the chipping posts, and I'm learning a lot, but it's hard at first.
 
turbodig

turbodig

Active member
Re: Questions on powering a 2.8L turbo with a 729 ECM

fisherbody86 said:
First off, this is my first post on SyTy (I've been a thirdgen.org member for years) and also new to tuning. I'm trying to put together a turbo 2.8L for my 88 Fiero, and I'm going to run the 749 ECM for obvious reasons. I have TunerPro, the BBZB 1580 .bin, and the $58 definition file. But where do you change the cylinder displacement? I don't see it anywhere in the def file. Also, could I just basically copy the spark and fuel tables from the stock 88 .bin and plug them in to the BBZB .bin for a starting point. Then just tweak them and play with the boost multiplier tables? I'm not sure that I'm using the correct terminology here, but hopefully you guys understand my questions.

P.S. I won't even THINK of actually burning any chips until I have a better understanding of what I'm doing. I'm reading the P4 doc and searching the chipping posts, and I'm learning a lot, but it's hard at first.
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You can't find it, because there isn't one.

Can't really copy spark and fuel tables, since the two code bases are structured quite differently. Not to mention, the cals are entirely different.

Really, though, you should be able to start with a base Sy/Ty cal, and adjust the EGR BPC constant to get a suitable idle. From there, start playing with the F29/F29c tables, then the F77 boost table.

Timing will be a matter of tweaking F1, but the 2.8 should run ok on 4.3 timing.

Get a good cruise bin working, fuel up the F77 table, and pull timing from the top of F1.
Go slow into boost.

You should be able to use a 2.8 memcal, with the BBZB burned into it. Don't use the 4.3
SyTy memcal.

What's your planned ignition system?
 
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