quote Originally posted by ccfiero350: There are some trade offs. With the MSD unit it will be techically not be emissions compliant, although it may pass the treadmill test using the 1988 standards for the car. The MSD unit is a bank to bank batchfire fire, speed density type ecu. So I'll loose a tiny bit of low speed drive manors and a little MPG and it may be a little persnickety untill it warms up. Here is a link that shows some more information on the ecu. http://www.umiracing.com/ga...y/Images/Catalog.pdf The goal of the car is to be a street legal track car that I can beat the snot out of with out the worries of breaking drive line parts. So I can certainly live with all that.

The ECM , Harness and Software that you reference cost $1900. By comparison if you purchased a ready made harness, used the factory PCM, and HP Tuners VCM tuning suite software you'd be in the neighborhood of $1300. If you wired yourself then deduct about $650.00. So a DIY wiring job should cost about $650 with the software. If you sent the PCM out for programming then you could rewire for $100 and probably have its programmed for another $100. The GM PCM appears to be the better and more cost effective alternative but the programming issues might prove challenging.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE WILDCAT"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 02-16-2009).]

Usually when you buy a complete drop out it includes the harness and ECU. I did not find out untill later there is a stand alone ECU for the LSJ from GM. racing. P#12610648 for the Ariel Atom. It's already setup for the stage 3 tune. I'm think it may use the electric throttle too.

The best option would be to rip the tune from #12610648 and put it in your ECU that came with the motor. It would be virtually free for the right person.

I have one here but I have not had a chance to play with it yet.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

quote Originally posted by ccfiero350: Usually when you buy a complete drop out it includes the harness and ECU. I did not find out untill later there is a stand alone ECU for the LSJ from GM. racing. P#12610648 for the Ariel Atom. It's already setup for the stage 3 tune. I'm think it may use the electric throttle too. The best option would be to rip the tune from #12610648 and put it in your ECU that came with the motor. It would be virtually free for the right person. I have one here but I have not had a chance to play with it yet.

Keep the post alive. This is getting interesting. I want to do an Ecotec for my next swap. Been hessitant to do so until now but with the right engine management, one of the main obstacles wil be removed. I don't know if you are aware of it but Ecotecs have found their way into dune buggies, a 6 second turbo dragster (Don Nase Jr) and other sport compact classes. These applications must use stand alone PCM.s without all of the interface garbage. Some may use aftermarket engine management while others may use the GM PCM.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE WILDCAT"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Don't forget boats!, very popular in power boat racing too. I think you will find the motor has invaded the 2.0-2.5 liter class of just about every form of racing. This is no way as huge as the popularity of the V8's but with diligent searching you can find the trickle down of speed parts for the ecotec.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

I have been working on the IMSA body of the ecotec car for a while in preparation for a speical Norm's front clip due in hopefully this month. See the body work in a seperate post.

https://www.fiero.nl/forum/Forum2/HTML/098086.html

I needed to get the rear clip in shape to finish the exhaust system.
https://www.fiero.nl/forum/Forum2/HTML/098086.html


I had made the exhaust system earlier with the cast iron manifold and the regular rear clip. I liked they way the two supertrapps look so I'm going to try to re-use as much as I can.


I'm thinking I may extend the lower pan as close as I can to the cat.


I just need to fill in the bits between the top half of the header and the cat.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

It's been cold and rainy for the last few days here in Houston and I've been stuck inside. I can only image what you northerners must put up with.

I've started back in the exhuast preparing the bits that I can off the car.


I cut off the tsudo flange and installed two V-band clamps on the first set of collectors.



The V-bands are real nice units. They will allow me to drop the exhuast system with out unbolting the header to work on the engine. Also I can make a race only second section and swap it out easy.


I got a set of used Burns merge collectors that I modified with a expansion cone to bring it up to 3" diameter of the rest of the system.

I wish I could weld as smooth a bead as the guys at Burns.

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yellow 88 GT, not stock
white 88 notchie, 4 banger