CLOKWRK

I had my '99 tuned this past summer after my heads/cam install and my rev limit was set to 6200. This is right AT my peak power according to the tuner and dyno. He said that you shouldn't rev a street-driven car past 6200. The good news is that it made great power...the bad news is it made it all up top (he said the power was still climbing). The cam is a 229/229 578. My question is: if my valvetrain is up for more RPM, wouldn't it be OK to bump the limit up to 6500 or so so I could shift @ 6300-6400?

Loudmouth LS1

Holy **** man!!!! That tuner is a retard!!! With that cam (better have upgraded valvetrain!) you should be shifting probably somewhere around 6600!!!! Your cutting off in the middle of your power band, you're losing major power and time off your 1/4!!!!!! Bump that limiter up to like 6800 or maybe even more?! Someone else with a little more knowledge please chime in, but I know my friend with the TR 224 cam which is smaller than that cam has the limiter set at 6800 and shifts it at 6600 all the time while racing!!!!

One more thing. You should be running around mid 11's or better with that setup, just to give you an idea of how much you're losing!!!! And somewhere around 120 traps!!!!!!!

afterimage ss

the guy who tuned your car at 6200 is a freakin' moron. i looked at your sig and the first thing that came to mind after reading what you had in your car and then noticing your 1/4 time was, "wtf?" .... go get that changed man, take it to another dyno shop and see what they say. hope to see you soon in 11's w/ your car PROPERLY tuned... wtf, lol

warner

Unless your car has a steel crank I wouldn't be taking it near 7K. You can break a cast crank if you do it too much. I'd talk to someone who knows LS1's real well and ask but it's been common to not take cast cranks much past 6k with regularity. I may be wrong on this particular engine.

rwb

I take mine to 6800 all of the time. I have had no rpm related problems. One of the crane 1.8 poly locks keeps loosening up, other than that no problems. LS1's love the higher RPM's.

V6toZ28

Stock rev limiter on these cars is 6200. A S2 H/C package will typically be at least 6600 and 6800/6900 isn't that unsual.

You got your H/C from Mike Morgan. You might want to give him a call and find out where he expected your power to peak with that package ... I supsect that it will be up around 6600 plus.

Like others have said ... you should be running in the 11s and trapping a lot closer to 120 than a 110.

Good Luck

CLOKWRK

I talked to Al at MMS (I think that was his name). He said I should make peak around 6200 and hold right up to 6800-6900. I think I'd better get another tune! I want 11's!!!

PhantomTA

You should be running 115-118mph on average

I would set the rev limiter to 6600-6800 and shift between 6400-6500. Im shifting my 226/234 cam at 6400 and i peaked at 6100

Our cars have steel cranks by the way. just not forged.