View Poll Results: What is a safe RPM for a stock bottom end with aftermarket springs?
6300 RPMs
38
8.46%
6400 RPMs
25
5.57%
6500 RPMs
89
19.82%
6600 RPMs
44
9.80%
6700 RPMs
45
10.02%
6800 RPMs
118
26.28%
6900 RPMs
29
6.46%
7000+ RPMs
61
13.59%
Voters: 449. You may not vote on this poll
Safe RPMs on a stock bottom end with springs
07-25-2006, 10:04 PM
#21
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The Rod Bolts on the 2000 and above are the newer style per the 2006 GM Performance Part Catolag
11610158
"Recommended for use in Performance engines
Bolts have a greater strength than the pre-2000 rod bolts.
One Bolt per package. Order two per coneecting rod"
11610158
"Recommended for use in Performance engines
Bolts have a greater strength than the pre-2000 rod bolts.
One Bolt per package. Order two per coneecting rod"
07-26-2006, 03:15 PM
#27
Originally Posted by 67Firebird455
What about the oil pump in these engines? What really is the difference between the LS1/LS6 oil pumps? I think that is something to take into consideration.
The LS1\LS6 use the same oil pump..no difference..
07-26-2006, 03:43 PM
#28
11 Second Club
Originally Posted by Viper
Stock bottom end = stock rod bolts = 6500rpm on the older rod bolts. Even with the new ones I wouldn't go past 6800.
On my '98 I have the shift points set at 6500 rpm with rev limiter at 6800. If/when I get better rod bolts I will set shift points up to 6800.
07-26-2006, 07:28 PM
#29
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Limiter is at 7400 and I have hit it several times when on street tires, cause it starts spinning and revs to the sky in no time.
Several other cam only cars shift around 7200 and others shift as high as 7400 on stock bottom ends.
Several other cam only cars shift around 7200 and others shift as high as 7400 on stock bottom ends.
07-26-2006, 07:55 PM
#32
11 Second Club
Originally Posted by SPEEDYws6
Limiter is at 7400 and I have hit it several times when on street tires, cause it starts spinning and revs to the sky in no time.
Several other cam only cars shift around 7200 and others shift as high as 7400 on stock bottom ends.
Several other cam only cars shift around 7200 and others shift as high as 7400 on stock bottom ends.
I wouldn't dream of spinning a stock bottom end that high. Do you have stock lifters too?
07-26-2006, 08:51 PM
#35
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Originally Posted by blkZ28spt
7,400 on stock bottom end?!
I wouldn't dream of spinning a stock bottom end that high. Do you have stock lifters too?
I wouldn't dream of spinning a stock bottom end that high. Do you have stock lifters too?
07-26-2006, 09:00 PM
#36
11 Second Club
Originally Posted by SPEEDYws6
Yep, and so do all the other cam only cars. I know that Rodney shifts his car at 7200, and Joe shifts his at 7400. Both cars have untuched heads, never been off the engine, so lifters are still stock.
07-26-2006, 09:17 PM
#37
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Originally Posted by blkZ28spt
They are pushing their cars hard in every way possible. I am sure they don't expect 50,000 mile reliability out of those motors shifting at those speeds, nor do they put miles on them at the rate that many daily drivers do.
I don't have as many miles on my setup, but I've put almost 7k miles on it since the cam swap ( had 50k before) and it meets the limiter everytime I drive it on street tires cause it's impossible to shift as fast as it revs
If you daily drive the car there is no reason to spin it to 7k all the time.
07-26-2006, 11:08 PM
#38
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May be a bit conservative, but I voted for 6800 based on the rule of thumb that you want to keep piston acceleration under 100,000 ft/s^2. That is the last even hundred RPM before 100k for the stroke and rod length of the stock LS1.
For whatever reasons, I am glad so many agree with me.
Mike
PS. I'm assuming post-2000 rob bolts of course. I plan to go with better lifters and titianium retainers to prevent valve float.
PPS. ARP bolt are so easy to install . . .
For whatever reasons, I am glad so many agree with me.
Mike
PS. I'm assuming post-2000 rob bolts of course. I plan to go with better lifters and titianium retainers to prevent valve float.
PPS. ARP bolt are so easy to install . . .
Last edited by Arizona Mike; 07-26-2006 at 11:15 PM.
07-27-2006, 04:55 PM
#39
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In my '01 I've got my limiter set at 6800, but I have my shiftlight set at 6400. I know I could wind it out to 6800 (hell I have before), but why chance it, and the longer my engine stays bolted together and running ... the better 
