MCDiver

I think the 5800 RPM thing is a safety that programmers use to ensure they are not sued for blowing up someone's engine.

zippy

I think that there just hasn't been enough effort in hacking the L31's software. It's not exactly in high demand.

Nitrous@LS1Truck

My scanner isn't working but I took a pic to show what the instructions have. The technology is there but there wasn't a high enough demand for the tuning. I just happened to talk to the right person at the right time. It doesn't default to 5800 RPM either.

Last Call

iTrader: (4)

WOW! Everything I heard people said it was 5800 rpm. People likes James B. or Hog would probably really appreciate this. This is good new for the Gen2 guys.

Have you verified the rpm on a tach to make sure you go past the 5800 road block?

Nitrous@LS1Truck

Yes, I ran it at the track before putting the LS1 in it. I never raised it over 6300 RPM though.

Last Call

iTrader: (4)

I would hold onto that thing. It is probably going to be worth big money. lol

Gran Patron

Yeah, hog is the guy who told me about the rev limit of 5800rpm. I know he'll probably be intrested in something like that. He gots an Ed Wright tune but cant recall if he was able to tune it pass 5800rpm. I know he tried but still it kept reseting to 5800. Hopefully he'll run into this thread to confirm.

Nitrous@LS1Truck

I spoke with John at Fastchip and he said you can program higher also. The intake is actually the problem and will quit flowing around 5500 rpm but the PCM can be programmed higher. I've looked into extrude honing and adding larger injectors but the best bet would be a GM Ramjet or Holley system with a set of Fastburn heads. I was looking into this combo before I put the LS1 in. The zz383 was actually my next candidate but why when you can go with an LSX.

Gran Patron

True, on a stock L30 or L31 it'll be useless going pass 5500RPM cause of the crappy intakes'. I know hog as the Marine intake on his truck and some LS2 style injectors that his runin'. Not sure what size or what LS2 style specifcally means,though.

I thought about just going BB on my 96' but I too fell victim to a GENIII motor.Guys here at work keep teasing me just go LS2, 6spd conversion. But damn only if it were that easy.

Nitrous@LS1Truck

You're still limited with the marine intake. I'd extrude hone the runners on the bottom half and look into a plenum spacer for testing. I wish someone would have designed a good aftermarket but there just wasn't enough of a demand. I do like the looks of the marine intake!