85blackgoldtpi

Hi I am debating buying a stealth ram from my friend . Comes with everything except the brain. Can my stock 85 z28 tpi ECM and wiring harness work with the stealth ram? I am swapping in a 350 and debating using my tpi or the stealth ram here is a pic

MoJoe

iTrader: (5)

Yes, you are just replacing the hard, aluminum bits. The electronic bits don't know nor care what kind of manifold it is sensoring. You will probably need to tune for the extra airflow at higher rpm.

The 85 ECM will work, but the newer models have more aftermarket support. I don't remember the model numbers, but swapping from the 85' ECM has been done and documented. Let someone else with more experience in the ECM programming field comment before you go down that rabbit hole.

87IROCZCamro

Put one on my car and after years of trying to get the car to run good im swapping to carb.

85blackgoldtpi

Thanks for the replies .what else would be suggested to make it work well thanks .

Tibo

iTrader: (15)

I ran it on a gen I MegaSquirt, plenty of members run it with all kinds of ecm, if you couldn't get it to run right that's not the fault of the intake. Efi tuning isn't for everybody.

85blackgoldtpi

Thanks for reply. Is the gen 1 mega squirt the ECM ?

Tibo

iTrader: (15)

MegaSquirt I is the first ecm they made. At least at the time it was a fuel only controller but it has since developed into being able to control any engine and gives total user control. It's not for the faint of heart though. A better option would be RBob ecm products. Most members use them and their is great tech support on these boards.

85blackgoldtpi

So basically I should upgrade the ECM for best results with the stealth ram

Tibo

iTrader: (15)

I am not sure about best results but Rbob's setup would be easier to work with and it still uses the 90-92 stock ECM with his modifications. Probably have an easier time getting advice for tuning with the 90-92 ecm.

birshking

i have an 85 iroc and have tried to get the stock '6870 ecm to work but no dice. i pulled a computer out of a 91 camaro '7730 and still cant get it to fire up.

WILL85IROC

so if I find one of these units on ebay or tgo, I can use it on a 350/383 with a upgraded ecm and tpi wiring harness??

Chad85T/A

iTrader: (1)

I'm pretty sure the harness from the 6870 has to be repinned in order for the 7730 to work. I know going from the 870 to the 165 requires a repin, so I don't see why the 7730 would be any different.

Chad85T/A

iTrader: (1)

I've been looking at the EBL myself.

2005Impalla

I am not much of a EFI person but if it was me I would reuse your old injectors too. If the injectors are higher flowing units I would imagine it would be easer to tune with the stock injectors if all you have are bolt on mods.

Damon

I'm with Impalla on this. If everything else is pretty much stock and you're just swapping intake for now, the stock ECM should run it OK. The earlier MAF-style EFI systems like your 85 uses are somewhat self-compensating because they measure the airflow going into the motor directly, as opposed to just inferring it from throttle position and vacuum. They won't handle big changes very well (cam change, bigger cubes), but and intake swap, sure.

anesthes

iTrader: (12)

You guys really need to get an understanding of EFI before changing things like intakes, heads, cams, etc. Otherwise you will be in for a world of hurt. Lots of variables that could potentially have a huge impact on how it starts, runs, drives, etc.

-- Joe

Orr89RocZ

iTrader: (20)

X2. If you start with a running tpi motor, hsr swaps in.
However 85-88 has cold start injector. Hsr does not! You will need to delete that in the tune

Damon

I have never been accused of lacking understanding of GM EFI systems before. I guess there's always a first time.

I would not have posted up my comment had I not had some personal experience putting an aftermarket intake onto a stock-ish TPI motor. In this case it was a direct swap of a TPIS Miniram onto an 87 L98 Trans Am (headers, roller rockers, CAI, nothing else). The Miniram also lacks a cold start 9th injector like the Stealthram. It fired up and ran just fine in warm weather. In cold weather it took extra cranking, but still fired and ran.

Ideal? No. Will it run? Absolutely.

anesthes

iTrader: (12)

I don't know that anyone accused you of not understanding GM EFI systems, but general good advice for our newer members should be to learn to tune an EFI system before randomly swapping out components.

Although I am somewhat surprised you swapped a miniram into an L98 without tuning and it actually moved. The few times I've used a miniram it required soo much AE work to keep it from popping through the intake it's not even funny. Then again, those were MAP cars so perhaps MAF is just that much more forgiving. (never ran one)

-- Joe

DontBlnkBadWolf

iTrader: (7)

I'm glad this thread was created. I have a chance to get a HSR for a good price without the harness and ECM. I was going to as the same question as the OP.

Bad Wolf