turbo chip

[Mr_Efficiency]

I'm building a 2.8 with a 2000+ 3400 top end and a turbo at around 9psi.

I have the bin file for the TGP but my displacement is smaller and my heads flow more so I dont think I'll be able to get away with just a TGP chip.

Is there anyone around here that can burn me a rough tune based on what I'm building? I'm not sure really how the chip and such works but can you just change the displacement and flow ratings for the heads.

I know a few guys that can burn chips but I'd prefer someone who knows these motors on here, the other guys deal mostly with the quad 4.

Or could I get away with just a TGP chip and a tune.

[Mars]

I am guessing you're going with something larger than a T25 ...?

If so, you'll need larger injectors, ect.

To be honest if I was you, I'd pick up all the tunning hardware and pick up a WB02 and mess with it yourself. It's the only way you'll get it close...

Tunerpro RT = free
chip = 6.00$
burner = 70$
WB02 = 300$

[Mr_Efficiency]

I was just thinking as long as the ECM knew the displacement and such that it was dealing with it would run decent. then I could just bump the fuel pressure with my rising rate adjustable fuel pressure regulator to keep up with the boost.

I have an A/F gauge to monitor it and keep an eye on things, I was thinking of using an ALDL cable and tuner pro jsut to data log and get a better idea of whats going on so I can adjust things to compensate.

yes I'm using something bigger than the stock turbo.

[Joseph Upson]

You might be able to get away with the stock TGP chip although likely poorly if you decrease your injector flow size proportionally to the displacement drop and since the chip is already designed for boost there is absolutely no need for a rising rate fuel pressure regulator, fuel adjustment is programmed to increase with boost already.

Some of the questions you have raised suggest you are very new to this madness, make sure you do a lot of reading on the subject for a better understanding of what you're dealing with. Although many have tangled with the TGP code it is not very friendly in my opinion when used on an engine that varies quite a bit from its stock configuration match up.

[CobraCDR]

I have 2.8 turbo 88 gpse. Here is what I know you going to need the 22# injectors you can get new bosch type III with the EV1 connector rebuilt on ebay for $170. Application to look for is late 80s early 90s TPI vette. The TGP chip will work if you have an automatic. It will run rich......but it will start and idle and run fairly well. You will want it fine tuned for max power and economy. go to TGPforums and talk with Adam (Flybynite) he is doing my tuning and might be able to sell you a good base tune based on his work with my car. He is the best resource at the best price I have encountered.

[Mr_Efficiency]

Thanks for the help, My 2.8 might work a bit diffrent than yours since I'm using the 3x00 top end so maybe mine wont run so rich with the extra air flow. unless these cars have an MAF then the ECM would see that extra air and compensate with more fuel bringing me back to being just as rich as you are.

Does the Grand prix have a MAF sensor... I always thought cars had MAF or MAP but I know for a fact this car has a MAP but there is a sensor in the intake ducting so I dont know.

[CobraCDR]

Thanks for the help, My 2.8 might work a bit diffrent than yours since I'm using the 3x00 top end so maybe mine wont run so rich with the extra air flow. unless these cars have an MAF then the ECM would see that extra air and compensate with more fuel bringing me back to being just as rich as you are.

Does the Grand prix have a MAF sensor... I always thought cars had MAF or MAP but I know for a fact this car has a MAP but there is a sensor in the intake ducting so I dont know.

Mine had a maf but if you car has had the service update like mine did the maf is actually a temperature sensor. I just unpluged it and had it removed in the tune. You will need to run an intake temperature sensor somewhere in the intake and you will need a 2 bar map. I have both of those in place of that crappy maf sensor. It never worked ask anyone. I thought they only used that on 88's how come yours has it? Weird.

[Mr_Efficiency]

I'm not sure what it is, i just know its a sensor in the intake ducting i just assumed it was IAT or something. someone mentioned to me I have to move the IAT sensor when i run the TGP chip cause on the TGP it is in the intake manifold and aparently the IAT from a quad 4 is the same and I have lots of those so I'll compare them.

[CobraCDR]

I'm not sure what it is, i just know its a sensor in the intake ducting i just assumed it was IAT or something. someone mentioned to me I have to move the IAT sensor when i run the TGP chip cause on the TGP it is in the intake manifold and aparently the IAT from a quad 4 is the same and I have lots of those so I'll compare them.

A new IAT is like 18 bucks from autozone.....even cheeper from rock auto. IMHO don't use used sensors when doing this stuff to the engine.....you will be chasing stuff down if something goes wrong. Go to moates.net and get the ALDU1 cable so you can datalog and make sure everything is okay after the swap....

[Joseph Upson]

Don't buy cheap sensors either, original equimpent used is often much better, especially if it's up against an Autozone igniton part for example, and I'm speaking from experience.

First Autozone ignition module- bad in 3 months
First Autozone igniton coil- bad in 1 year or less
Second Autozone igniton module with distributor assy- distributor great, module- abnormal off idle response, swapped in new GM module, symptoms gone, noticeable power increase.
Autozone cooling fan relay- failed in less than a years time when subjected to the same work loads the OE relay in its multi year used worn state survived who knows how long in.
Autozone cooling fan motor- see above and I'm not exagerating. If you apply extended duty cycles to these parts they will fail in short order. The OE parts can run circles around them fresh out of the junkyard.

It's not just Autozone, Carquest sold me a MAF sensor for my TPI IROC that had a simple resistor soldered in place of the fine gauge burn off wire, that caused the engine to stumble on opening throttle.

They all make parts to meet fitment specifications, but if you're looking for quality you've got another thing coming. You can't have high quality and a lifetime warranty together. There's a reason your Autozone or Advance autoparts lifetime spark plug wires come apart when you attempt to remove them from a spark plug.