Higher max rpm
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by vette95
Can I raise the rev limiter on a LT1 engine with roller rockers to the same as the LT4?
Melting Slicks
Joined: May 2002
Posts: 2,670
Likes: 4
From: Severna Park MD
Originally Posted by vette95
Can I raise the rev limiter on a LT1 engine with roller rockers to the same as the LT4?
I raised the limiter on my LT1 to 6400 and even with the Hot Cam kit the power is falling off there. No need to go higher than that.
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Thread Starter
Heel & Toe
Joined: Sep 2004
Posts: 24
Likes: 0
Originally Posted by VictorRussell'92
Why? you planning on going 180?
Melting Slicks
Joined: May 2002
Posts: 2,670
Likes: 4
From: Severna Park MD
Originally Posted by vette95
It´s because it shouldn´t hit the rev limiter when shifting 1-2. I don´t know if it will,haven´t driving it yet with the new gears,just wondering if the engine can take it.
He won't take an engine near the limit on a dyno pull.
Melting Slicks
Joined: Sep 2003
Posts: 3,326
Likes: 1
From: I live at www.domesticlugnuts.com I sleep in PA
Originally Posted by cuisinartvette
How's that systemax coming along? 
I am having a slight traction problem when the 4 barrel kicks in and I have wornout a rear set of tires in 3,000 miles (Don't tell Lisa).
I am also in hopes of rebuilding the bottom end so that I can turn higher RPM's, I am shooting for 7,000 RPM reliability.
I will get it on a dyno this Spring and post the results.
Thanks for asking.
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by Nathan Plemons
If you're running LT4 springs I wouldn't raise it very far for the reasons mentioned above. If you're running overkill on the springs you can easily turn the stock bottom end to 6500 RPM's.
BUT
When GM made the LT4 they made improvements in the "bottom end" over the LT1 in order to raise the rev limit to 6300....improved crank, piston rings, ....
An LT4 is more than an LT1 with a head job....top end work
http://www.grandsportregistry.com/lt1vslt4.htm#CRANK
