LS7 lifters??
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That's the thing...I don't think they fail much. A stock lifter does a great job of what it is supposed to do. Millions of vehicles out there with that very same lifter that have no problems at all. I know...the next thing that will be said is that these are modified vehicles we are talking about. Ok....go buy a lifter designed for that application. The thing is that there are too many variables that may cause lifter failure. Just like the failure of any internal engine part.
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Originally Posted by Unaffiliated Racing
That's the thing...I don't think they fail much. A stock lifter does a great job of what it is supposed to do. Millions of vehicles out there with that very same lifter that have no problems at all. I know...the next thing that will be said is that these are modified vehicles we are talking about. Ok....go buy a lifter designed for that application. The thing is that there are too many variables that may cause lifter failure. Just like the failure of any internal engine part.
I don't see that happening.... I worked for Comp for two years and it was a very rare deal to see a hydraulic roller lifter fail for no apparent reason. That is in all motors that use this lifter...not just the LS-1. Another thing..you are looking at lift and lift alone....the ramp rates of an aftermarket cam are far more aggressive than an LS-7 cam anyday.
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Originally Posted by Unaffiliated Racing
I don't see that happening.... I worked for Comp for two years and it was a very rare deal to see a hydraulic roller lifter fail for no apparent reason. That is in all motors that use this lifter...not just the LS-1. Another thing..you are looking at lift and lift alone....the ramp rates of an aftermarket cam are far more aggressive than an LS-7 cam anyday.
Teching In
Joined: Aug 2004
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From: Ohio
Originally Posted by StreetnStrip
i understand what ur saying but if the LS7 lifter is the same as a lifter in a 2002 LS1 motor then how come the LS1 motor fails when u put a cam that is smaller then .600 lift? I mean if I remember correctly aint the new Ls7 cam like 595 598 lift? If so then those lifters should be able to take abuse a ls7 can take.
I'll throw in my 2 cents on the lifter failure and agree with Unafilliated Racing that most lifter failures are due to their use with some aggressive cams is beyond the design. Yes, the ramp rates are part of the problem, but the seat and open pressures do a number on a stock lifter. We tend to run lighter seat & open pressures based on application then most other shops with no failures and still run to 68-7000 RPM on an XER lobe. Hope this helps.
Mike Norris
Mike Norris
I must also agree.
We has had 1 count it 1 car with lifter problems in the past 5 years.
I think the stock lifters do a great job.
I would guess we have had 150+ modded LS1's/LS6's during that time spand and only 1 set has had a problem. This was also a 65,000 mile 2000 LS1 that has had 1000's of races under his built with a 400 cubic inch motor, and a aggressive ramp rate on the cam.
We has had 1 count it 1 car with lifter problems in the past 5 years.
I think the stock lifters do a great job.
I would guess we have had 150+ modded LS1's/LS6's during that time spand and only 1 set has had a problem. This was also a 65,000 mile 2000 LS1 that has had 1000's of races under his built with a 400 cubic inch motor, and a aggressive ramp rate on the cam.