EFI help needed

[wayfastwhitey]

I hope someone can help me out. I'm trying to build an engine to go for a land speed record but know nothing about EFI. First thing I need to know is how far I can go with the cam as far as LSA, IC, overlap, and duration. The engine is a 2.2L 134 CID chevy motor and as of right now, there doesn't appear to be any way to edit the ECU. That being said, a stand alone ECU may be what I have to use, but I would like to know just how far you can push a stock ECU. Pardon the questions if they are dumb...I've been living in the dinosaur ages of carbed motors. :confused:

[Saleen91]

I have no idea how to answer this. As for the cam spec's I'd recommend you call a cam manufacturer. As far as a stock ECU that depends on what it is and if there is any aftermarket support for it. I know that the popular Ford and GM ECU's have a fair amount of aftermarket support (Mustang, Camaro, Corvette as an example) and as long as you have a way to connect into them to adjust the tune you can push them quite far. But if you have NO aftermarket support for it, you're pretty much stuck with going to a standalone like a FAST or BigStuff setup.

[Chad82GT]

I had ot read the cam question a couple of times, but I think he's asking if EFI has limitations with cam specs... ie: too much overlap, LSA, etc.

Like Ben said, it all depends on what kind of stock ECU you're using. My guess is there isn't much out there for stock GM 4cyl EFI.

That leaves afermarket stand-alone which can run anywhere from $2000 on up, depending on what you need. I've had good luck with www.injection-connection.com for my standalone needs.

[wayfastwhitey]

Thanks guys. As of this moment there is no aftermarket support for my ECU. HP Tuners is working on it, and was supposed to release a tuner for beta testing a couple of months ago but so far has not. So that leaves me with running the stock ECU with a mild regrind that may or may not upset the computer, or going stand alone. The stand alone will allow me to tune every aspect and be able to run the cam I need to make the power. That pretty much covers what yall are saying, right?

[red95gts]

Check out www.megasquirt.info and see what you think. Very cost-efficient and extremely capable stand-alone unit. Just requires that you learn the inner workings of how EFI functions - which isn't a bad thing to know no matter what route you choose.

Best of Luck.

[wayfastwhitey]

I've heard of the mega squirt. Might be an option if I can get a little more EFI litterate first. Thanks