3400 dyno results

[robertisaar]

meh, if i can get water up under my dash i probably deserve my ECM to cook.

i don't have the "luxury" of an in-dash ECU... mine sits right between the radiator and expansion bottle.

makes for fast chip swaps though.

[pocket-rocket]

Got anymore? How much for a 9396 and pigtials? PM me if you got one for sale.

Well one is in the 92 (hell no!) and the other is on the harness that I took off the engine on the stand to mess with when I was trying to get a working ALDL interface going. I'm not sure if I want to part with that one yet. Also the pigtails would be quite short. There are a couple Z34s at the yard I need to go back to for some stuff. What kind if price are you thinking is acceptable? I haven't asked them what they charge for an ECM yet, so I have no clue how much they want for them.

[IsaacHayes]

Right now I'm looking at $57 shipped for a clean PCM and about 6-8" of pigtails coming off it. If you can beat that, great. Let me know.

[1988GTU]

I've got a 96 Beretta PCM, clean and ready to ship.

[IsaacHayes]

1988GTU, that would be another option if Bridgetown wanted to go that route. I'm however going OBDI so I don't have to add any wires or swap harnesses.

[1988GTU]

40.00 shipped for the pcm! huh? huh? !!

[IsaacHayes]

I don't want to go that route. I'd have to have a DHP and engine harness if I went that route. That's not a bad price though.

Keeping this on topic, Bridgetown that 3.4L RWD PCM is putting a TON of spark that the 3400 doesn't need/want.... The iron heads ran a ton of spark because they are not fast burn heads. Even if you were not to tune, swapping to a 94-95 3100 OBD1.5 ECM would be a direct swap and probably run it a lot better, except it would be an auto PCM, so you might get idle and stalling issues with the 5spd. I'm guessing you are running a 3.4 RWD PCM from a manaul car?

[Bridgetown]

Yes, I am running a rwd 3.4 sfi pcm right now. I am reluctant to swap in another pcm unless it can be tuned. The car runs so damn good right now to mess with it. The only reason I would even bother with re-pinning or swapping computers is to compensate for future mods. I am going to lighten up the car as much as possible first, if thats not enough, then I'll mod the engine.

[Bridgetown]

What I would ultimatley want is something that will be a plug in pcm swap, without modifying my harness. That way if I piss it up, I can always go back. That is why Forcedfirebirds appealed to me. That is what has been holding me back from swapping in my 7730. It was a battle as it was just to get this harness working properly, and it was mostly complete when I got it!

[robertisaar]

swap to a 7727(weatherproof) or 7730(not weatherproof) if you don't plan on running a -e tranny. if you are, then go with a 16149396.

if you go with either the 7727 or the 9396, then then pinout work is already done: its in my guide in the obd1.5 to obd1 conversion thread.

7730 requires some work since the connector is not the same as the other two.

with the 7727 or 7730 you can run a shitload of masks, most noteably, 8D, 8F, 59, and A1.

the 9396 can run anything the 7727/7730 can, plus DF.

[Bridgetown]

My car is a manual so I suppose the 7727 would be the best. I am not very knowledgeable when it comes to computer tunning. I would have to pay someone to tune for me. Have you got a link to that swap guide Robert?

[robertisaar]

http://60degreev6.com/forum/f104/the-obd1-5-to-obd1-conversion-thread-t43453

there it is..... the thread anyway, the guide is around post 50 i think?

EDIT: thats the old one, newest one is post 118...

i'll be playing with my attachments to get rid of the unecessary ones soon...

double EDIT: you can run a 9396 with a manual as well. not sure how much difference there is between the tables in other codemasks, but if you can pick them up for the same price, get the 9396. it will probably be newer.

TRIPLE EDIT: i moved the guide to page 1...

[Bridgetown]

So theoretically I could buy two computers to get one set of female plugs and build a "adapter" harness myself from your guide, correct? Then I could plug in the adapter and the new PCM. If I wanted to go back I just leave all the old sensors and wires inplace on the engine, and it would be as simple as unplugging the new PCM and plugging in the old one. If this is the case, which PCM would be the best for my setup? Easiest to find in the junkyard?
2002 3400 (intake/exhaust opened up, no a/c, no pwr steering)
Early 3400 injectors and FPR (43.5 psi)
95 3.4 sfi iron head PCM
only running one O2 sensor (left/right bank wired to single sensor)
Using 3.4 style knock sensor
5 speed getrag

I would like to go with a complete 3500 top end and cam in the future. I want to get some revs out of it too. I am looking for around 230 wheel horsepower. Where could I get a good tune from to start from after I do the PCM swap?

Edit: PCM case size may be a consideration as well. I have to mount it in the console in the Fiero, it is already pretty tight with the Firechicken PCM. When an adapter harness is added with the extra plugs it will be hard to get it all in there.

[robertisaar]

thats exactly what i did, except instead of buying a second obd1.5 PCM, i got stuff through mouser and PSG. same process though.

which cars have this PCM: any 94-95 3100 except for the A-body. the 94-95 3.4 from the F-bodies also works. i think those are the only vehicles that use this type of connector.

and yes, it is plug-and-play, though after switching to a tuneable ECM, i'm not sure why you would want to switch back to stock...

EDIT: tunewise, ben has a 3400/5 speed fiero tune in the store, that would be a good place to start.

[Bridgetown]

So... you wanna build me one Rob?