Hey guys, I am wondering what the safe redline for a 95 LT-1 motor is, it's basically stock with the exception of open long-tube headers and a Holley 750 vac. secondarys. it's in my bracket car and I don't want to push the bottom end to the point of breaking while shifting. thanks

 

Stock rotating assembly, stock valve train, you should be safe to 5,600 RPM ****ing. The LT4s with the same rotating assembly and improved valve train had a factory redline of 6,300 RPM.

EDIT: OOPS! My left index finger forgot to hit the "F" key. Yes, that was supposed to read "shifting".

Defecating is what the engine will do at much over 6,300 RPM, according to the factory.

 

thanks, I think I'll try shifting at about 5,200 to start and see how it goes.

by the way, I see all your little **** in your reply, I hope you misspelled "SHIFTING". if not--------

 

VADER!!!! You nasty boy! Watch that language mister.

About 6000 RPM is all you should stretch it to, if you want it to live a long time. It's probably go to near 7000 once or twice.

If it a bunch of used stock valve springs it will cease to make meaningful power long before the bottom end is in danger, due to valve float. i.e. the car will go faster if you shift sooner. I'd be real surprised if the car's best time occurs shifting at anything above 5400 RPM or so, in which case "redline" isn't an issue.

 

that used to be true, but the LT1 and the LS1 both come with better valvesprings... they'll still float, but you can overrev the engine and still have it pulling.

 

That may be true on the 'F' and 'Y' cars, but the 'B' cars with iron heads still used the 85# @ 1.70" springs, like most other SBC on the planet. The LT4 "Hot" cammed engines used stiffer springs with a better rate and lift capability for the .525" net lifts.

 

Rev Limiter at 5800 on my 94..

 

'Y' body, LT4 "Hot" cam?