lt4 rev limiter
Thread Starter
Racer
Joined: Apr 2005
Posts: 408
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lt4 rev limiter
Have any other lt4 owners hit their rev limiters, and felt as though the power really hadn't fallen off yet. What I mean is it feels as though there are a few hundred more usable rpm that are being cut off. I really notice this more when winding out first gear. It just feels like the car is still accelerating when the pcm says 
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Oh yeah, when mine was stock I did it quite a few times...I did it a lot more when I put the 4.09 gears in the back! Now I have it set at 7100 and I still hit the damn thing!
The LT4 springs aren't that great, and I'm not sure when they hit valve-float, if you upgrade the valve springs, then you can pretty safely raise the rev limiter by a few hundred RPM. When I did heads/cam on my LT4 I set the limiter at 6450
The LT4 springs aren't that great, and I'm not sure when they hit valve-float, if you upgrade the valve springs, then you can pretty safely raise the rev limiter by a few hundred RPM. When I did heads/cam on my LT4 I set the limiter at 6450
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by lt4red
Have any other lt4 owners hit their rev limiters, and felt as though the power really hadn't fallen off yet. What I mean is it feels as though there are a few hundred more usable rpm that are being cut off. I really notice this more when winding out first gear. It just feels like the car is still accelerating when the pcm says
Thread Starter
Racer
Joined: Apr 2005
Posts: 408
Likes: 0
The car is basiclly stock, and i've seen the dyno graphs for stock lt4's (not mine),which would seem to back up what your saying. I just have never touched the rev limiter on anything else i've driven, and I've had a few performance oriented vehicles. When I hit the limit on the vette i'm suprised by it every time. Maybe the lt4 just builds rpm a lot quicker than my old rides.
