Max Rev limit for LS2
Pro
Joined: Nov 2006
Posts: 667
Likes: 0
From: Eagle River Alaska
My guy told me this:
"The cam (Whiplash) itself can easily spin to 7500rpm, possibly higher. Your limitation is NOT the cam - it is your valvetrain and your rod bolts. LS series engines have weak rod bolts and at high RPM, have a tendency to separate - and putting a rod through the side of your block. The other limitation is your valvetrain. The hydraulic lifters will either pump up or collapse at sustained high RPM (above 7000) and the stock roller rockers will flex under that kind of sustained load.
So. Upgrade your bottom end and your valvetrain if you wish to spin your engine above 7000rpm".
So I did.
"The cam (Whiplash) itself can easily spin to 7500rpm, possibly higher. Your limitation is NOT the cam - it is your valvetrain and your rod bolts. LS series engines have weak rod bolts and at high RPM, have a tendency to separate - and putting a rod through the side of your block. The other limitation is your valvetrain. The hydraulic lifters will either pump up or collapse at sustained high RPM (above 7000) and the stock roller rockers will flex under that kind of sustained load.
So. Upgrade your bottom end and your valvetrain if you wish to spin your engine above 7000rpm".
So I did.
Burning Brakes
Joined: Aug 2008
Posts: 802
Likes: 6
From: Oro Valley AZ
My guy told me this:
"The cam (Whiplash) itself can easily spin to 7500rpm, possibly higher. Your limitation is NOT the cam - it is your valvetrain and your rod bolts. LS series engines have weak rod bolts and at high RPM, have a tendency to separate - and putting a rod through the side of your block. The other limitation is your valvetrain. The hydraulic lifters will either pump up or collapse at sustained high RPM (above 7000) and the stock roller rockers will flex under that kind of sustained load.
So. Upgrade your bottom end and your valvetrain if you wish to spin your engine above 7000rpm".
So I did.
"The cam (Whiplash) itself can easily spin to 7500rpm, possibly higher. Your limitation is NOT the cam - it is your valvetrain and your rod bolts. LS series engines have weak rod bolts and at high RPM, have a tendency to separate - and putting a rod through the side of your block. The other limitation is your valvetrain. The hydraulic lifters will either pump up or collapse at sustained high RPM (above 7000) and the stock roller rockers will flex under that kind of sustained load.
So. Upgrade your bottom end and your valvetrain if you wish to spin your engine above 7000rpm".
So I did.
When you get your car tuned, look at the graphs and watch where the torque starts dropping off.
