Picked up an LT5 and ZF

[Jrpontiac]

Thanks for all the info. I'll give Jerry a call. I'm just going to round up the ECM and flywheel/clutch parts and then start looking for a car. As mentioned a 2nd gen Camaro is what I'm thinking now but who knows what I'll bump into??. My fun cars are a 77 c10 with a 5.3ls turbo/th400 combo and a 17 SS Camaro Convert so I might go with something off the wall. I've always had a soft spot for Volvo 242's...

[tnova]

I'm in Spokane Valley. We should get together. I've a '91 ZR-1. There's a gent up the street from me that has several ZR-1s as well as a C2 split window with a LT5 and a '55 or '57 (can't remember what year) with LT5 in it. My number is (619) 520-8081.
Tony - Tnova

[klork]

Join the volvo club! Mine is going in my 1990 740 wagon.

[spork2367]

Originally Posted by rbidwell

Mega-squirt has developed an ECM for the LT5 and should be available thru Jerry's Gaskets. It is the unit on my Raptor twin turbo.

Unless Jerry has some deal he's kept secret, the ECU needs to be ordered directly from DIYAutotune. It is a made to order item, not listed on their website. It will run about 2400 unless you can get a group of people to buy. Mine took about 3 months to get.

Some info on it...mine wasn't really plug and play. It started and ran the engine, although extremely poorly. Not driveable. I got this just to learn on, so I still had the factory ECU. I haven't messed with it a whole lot, but people do need to understand, you will either need tuning knowledge yourself, or to take it to someone who does.

[rbidwell]

I purchased my Mega-squirt system thru Ron Hanselman. Corey Henderson installed it on my car. Jerry's Gaskets maybe waiting to make there are no bugs before adding it to their inventory.

[spork2367]

Originally Posted by rbidwell

I purchased my Mega-squirt system thru Ron Hanselman. Corey Henderson installed it on my car. Jerry's Gaskets maybe waiting to make there are no bugs before adding it to their inventory.

Maybe Jerry can chime in, but I've heard nothing of him selling these.

Just to be clear, DIYAutotune is the only place building these and they can only currently be ordered from them. I mean, you can order one through me for a 20% markup if you'd like...

As far as "making sure there are no bugs," this has been running on one car for an extended period of time. DIYAutotune doesn't sell prototype ECUs, so the bugs have already been worked out. There is a base tune available with the ECU, but this is NOT a "plug and play" replacement at this point.

As of the last conversation with DIYAutotune, the project was sitting idle.
There were still features with the trip computer that weren't resolved. They had hoped to work on it in the future and had some additional info based on some other projects cracking Ford dash serial bus communications, but I don't think the demand was there to put a lot more effort into ours.

[RussMcB]

Originally Posted by spork2367

...mine wasn't really plug and play. It started and ran the engine, although extremely poorly. Not driveable.

That's interesting. I would have thought it would have been pretty close right out of the box.

I'm local to them, so lent my car to them for a couple of months (back in 2016?). They ran a bunch of pulls, fine tuning it with the goal of having an ECM to sell to LT-5 owners. I got the car back from them with the MS3-Pro ECM installed and I haven't touched it since. It runs great. My engine is stock (including secondaries) with headers.

[spork2367]

Originally Posted by RussMcB

That's interesting. I would have thought it would have been pretty close right out of the box.

I'm local to them, so lent my car to them for a couple of months (back in 2016?). They ran a bunch of pulls, fine tuning it with the goal of having an ECM to sell to LT-5 owners. I got the car back from them with the MS3-Pro ECM installed and I haven't touched it since. It runs great. My engine is stock (including secondaries) with headers.

I've contacted them several times and not received a lot of help. Even after sending them a log. Car (parts car) runs fine with factory ECU, runs like **** with megasquirt. It could be a car issue, but they couldn't tell me anything other than that the MAP was disconnected initially (hose pulled off), but it didn't run much better after that.

I'd love to test it on my 1990, but there is supposedly an internal wiring difference between the 1990 and 91+ that they also couldn't really give me details on.

[-=Jeff=-]

1990 has a couple things different..

Power key circuit and wire location on the ECM as well as the Knock sensor control. 1990 is external, 1991 is internal..

Concerning if the ECM Manufacturer cannot tell you about that or even have it listed in their own notes

[klork]

Al lot of these issues really dont pertain to the op since all he has is the engine and trans. He can get the latest pro series megasquirt with a wiring harness for around 1400. For the over 2k for the plug n play zr1 computer he could get a holley dominator computer