LS computer ('0411) running a Small Block Chevy

[dave w]

I like my EFI Live system. Yes, my EFI Live system was expensive, but I found a decent price on a used EFI Live system on Ebay. The MPFI project has taken a few turns in direction. This is actually the second system I've built. The first system I build was sold to a BB Chrysler owner.


I really can't say if the sequential system is a huge improvement for an older SBC. What I can say, is the system I built can be installed underhood as a stand alone system, operate a 4L80E, and is completely bolt on! Maybe this system does not appeal to the budget EFI system buyer? Compared to aftermarket EFI systems, repurposing a LS PCM as a bolt on system for an older SBC has merit. I'll also comment, it would not be that big of a change to make the system pictured operate an actual LS engine!!

dave w

[EagleMark]

All good points, I like the underhood part! As time goes on you'll be way ahead in the learning curve.

Can it do 4l60E or 700R4? I know it came with manual trans...

The LT1 system is all underhood and would make for a great conversion system if it could be made to run a regular EFI distributor, if you can do it with LS computer it's probably easier. Cheap software, Flash by ALDL port. But there's just not alot of OBDI LT1 available. Only 2 years and all the cars they came in are desirable so not many end up in JY. Then 2 more years OBDII. Where your getting in on ground floor of a system that will become more and more available as time progresses.

[dave w]

All good points, I like the underhood part! As time goes on you'll be way ahead in the learning curve.

Can it do 4l60E or 700R4? I know it came with manual trans...

The LT1 system is all underhood and would make for a great conversion system if it could be made to run a regular EFI distributor, if you can do it with LS computer it's probably easier. Cheap software, Flash by ALDL port. But there's just not alot of OBDI LT1 available. Only 2 years and all the cars they came in are desirable so not many end up in JY. Then 2 more years OBDII. Where your getting in on ground floor of a system that will become more and more available as time progresses.

Yes 4L60E.
No 700R4.

I think the future of the LSx computer is promising.

dave w

[EagleMark]

Got to be away to just lock up a converter on 700R4? I mean if it can do the other 2?

Yes LSx is coming, this old OBDI stuff is getting rarer by the day. But theres an entire section of Vortec PCMs we seem to forget that should be now coming in abundance? Or are they worthless for conversions? I know the CPI has issues with poppet valve imitation of MPFI... but the rest of motor was great.

[one92rs]

here is something neat.
http://www.eficonnection.com/eficonnection/24x.aspx

[JeepsAndGuns]

Nice work. I too am with mark and just cant afford or justify the high cost of the tuning software for the 411. Otherwise I would be building a 411 system for both my cherokee, and the 4.0 in my wrangler.

So untill there are more affordable options for the 411, I will be sticking with the 7427 in my cherokee, and the stock ecm in my wrangler.

[dave w]

here is something neat.
http://www.eficonnection.com/eficonnection/24x.aspx

Nice stuff for sure! Basically, the system I designed is completely bolt on (no removal of the timing cover from the engine) and is only a fraction of the cost of the EFI Connection system!

dave w

[one92rs]

guess i need to pay attention as how you are doing this. i have a friend with hptuners and is good with it. i would love to have the coils and a ls pcm running my small block.

[dave w]

Got to be away to just lock up a converter on 700R4? I mean if it can do the other 2?

Yes LSx is coming, this old OBDI stuff is getting rarer by the day. But theres an entire section of Vortec PCMs we seem to forget that should be now coming in abundance? Or are they worthless for conversions? I know the CPI has issues with poppet valve imitation of MPFI... but the rest of motor was great.

700R4 might be possible for the '0411, but I have not invested the time to figure / find out how.

The downside to the Vortec PCM (very abundant / cheap) is the lack of software!!!

dave w