LT4 rev limit?
01-21-2005, 12:02 PM
#1
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LT4 rev limit? My Dad has a 96' C4 with the LT4. He said the stock limiter was 5800 rpms. He just got it bumped up to 6100 rpms. We both think that sounds a little low, do any of you know the highest you can safely rev the lt4?
01-21-2005, 10:13 PM
#2
Originally Posted by _graham_
My Dad has a 96' C4 with the LT4. He said the stock limiter was 5800 rpms. He just got it bumped up to 6100 rpms. We both think that sounds a little low, do any of you know the highest you can safely rev the lt4?
01-21-2005, 11:07 PM
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I rev my solid roller (valvetrain is not the limiting factor here) stock short block to 6800. It`s not there for long, though.
I`m sure Mobil 1 helps and the ATI damper.
How long it will survive these bursts,
I don`t know.
Rev at your own risk!
I`m sure Mobil 1 helps and the ATI damper.
How long it will survive these bursts,
I don`t know.Rev at your own risk!
Last edited by cdb95z28; 01-23-2005 at 12:05 AM.
01-22-2005, 01:25 AM
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I just remembered that he has an OBD1 computer. So it was probably using the LT1 limiter. Which would explain the 5800 (or 5750) limit. 63-6500 seems safe.
01-22-2005, 10:15 AM
#7
I rev my stock bottom ended LT1 to 7,000. If you added a better cam and valve springs you could go this high.
With the stock valve train I would go about 6,400. I just puller up two stock LT4 files and this is what the Limit was set at
Now I can also tell you the Corvette tach seems to be WAY off on the to end
The computer stops giving fuel at 7,300 no matter what you set it at
Good luck!
With the stock valve train I would go about 6,400. I just puller up two stock LT4 files and this is what the Limit was set at
Now I can also tell you the Corvette tach seems to be WAY off on the to end The computer stops giving fuel at 7,300 no matter what you set it at
Good luck!
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01-22-2005, 10:38 AM
#8
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Originally Posted by TwoFast4Lv
I rev my stock bottom ended LT1 to 7,000. If you added a better cam and valve springs you could go this high.
upgraded lifters helps too
01-22-2005, 11:58 AM
#9
Originally Posted by TwoFast4Lv
I rev my stock bottom ended LT1 to 7,000. If you added a better cam and valve springs you could go this high.
With the stock valve train I would go about 6,400. I just puller up two stock LT4 files and this is what the Limit was set at Now I can also tell you the Corvette tach seems to be WAY off on the to end
The computer stops giving fuel at 7,300 no matter what you set it at
Good luck!
With the stock valve train I would go about 6,400. I just puller up two stock LT4 files and this is what the Limit was set at
Now I can also tell you the Corvette tach seems to be WAY off on the to end The computer stops giving fuel at 7,300 no matter what you set it at
Good luck!
01-24-2005, 06:54 AM
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The last time I drove it, I did notice the tach was moving slowly, for what seemed like a fairly fast reving engine.
Sweet. Thanks for all of the help.
Sweet. Thanks for all of the help.
