A guy I know is putting a '87 5.7 TPI motor in a'89 IROC 5-speed car, was originally a 5.0 TPI.

What is invovled? I assume he must use the harness from the 5.7 car, but it was an automatic.

What other changes must be made?

 

I would think he could use his stock harness just with a different knock sensor (one for a 350 block)..

 

Assuming his car is already TPI he doesn't have to do much. As mentioned above he needs the knock sensor for a 350. He also needs 22lb. fuel injectors and a new PROM. Since his car is a 5-speed he will need to have someone burn a PROM for him, as no F-body had a 350 with a 5-speed. This is pretty simple actually. I did this swap, and I simply had a friend do it who had PROM burning equipment. The blank chip cost me about $5 bucks, and my buddy's labor cost me a Philly cheesesteak.

 

I was wondering about this for my LG4 --> TPI swap. I thought that the PROM only looks for the VSS input? Why is there a different burn for a manual trans car than an automatic?

 

Nevermind - I found my answer in another thread:

 

The car will run with an auto chip, but the ECM will be confused becasue it will be looking for input to see what gear the trans is in. Normally the ECM has the ability to alter idle speed in an automatic car based on what gear it's in. It's hard to explain, and I don't totally understand how it works myself, but since your ECM will be confused you might have a surging problem at times. I have seen the effects of this myself. It will run much better with a manual chip.

 

cool, thanks guys, anybody know where there's a place to burn the prom?

As far as no 5.7 cars built with 5-speed, yes there were some up here in Canada. They were used in the Players Challenge racing series, they were all 5.7 with manual trans. There might even be a part# for that prom????

I saw quite a few back in 87-90 I beleive it was....

 

PM me about burning a simple chip for you with the correct injectors constants, etc. I take if you want to keep the MAF setup, right? That'd probably be easiest, a lot less wiring than converting to SD/MAP.

 

I also did this swap and its still on blocks. I have a 350 with a T-5 bolted up, so what you guys are saying is it won't run properly? If i need a chip then guess I better start now before the car is done! PM me if you have access to one of these chips. thanks a ton.

 

Are you talking about the sensor on the block its self or the harness that attaches to the sensor on the block?

Kevin

 

Sensor on the block. If you have a 350, use the 350 knock module. Don't use a 305 knock module on a 350 because you can get false knock readings.

By the way, I just mixed up a quick BIN for a T-5 behind a 350 motor with stock iron heads. 83BlackBeauty is probably going to be the test mule for it.

 

I'm down for that too. I should be doing my harness/computer swap in the next two weeks or so.

 

Let me know if you're interested. Its got basically most of the stock calibration stuff from a 350TPI BIN just thrown into a 305 T-5 BIN, and I changed some of the highway mode settings to get a bit better gas mileage at semi-highway driving (constant 40mph+ etc) and changed some fan settings to 203on/195off. Shift light should come on at 4700-4800RPM or so (don't remember the exact setting right now). This is for stock 22# injectors, and that can be easily changed from one chip to the next. Like I told 83BlackBeauty, I'd recommend buying the MEMCAL adapter from Craig Moates' site to make things MUCH easier to install and eliminate possible issues.

I'll burn the chips for people if they need it, but I am not going to offer any performance tuning. Honestly, I think its pointless to tune a car over the internet/phone/etc, and I'm not good enough to be able to even touch that stuff if I'm not in person. All of the stuff I changed is pretty basic and should give you a good base for a stock 350TPI motor with a T-5.

 

sent you a PM.

 

Depends...i have read on here that the auto chips have worked well with the t5's.....In my case it worked okay....but the car would buck alot when you let off the accelerator to the point it got annoying. Best bet is either to get into prom burning yourself, or take it to a place with a dyno where they can burn a chip for you. Or duron can burn you one, all depends on what you want out of it.

 

Yeah, I could do it and it'd be much cheaper. But like I said, its not going to be a performance chip. Its just a stock chip that will make your stuff work with some minor changes (fan controls, etc.). I don't want to mess with tuning anything over the internet. I have nowhere near the skills to do that and I think the only way to get a real tune is to do it yourself or take it somewhere. Problem is, those take time and more money. Depends what route you wanna go for I guess.