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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 01-29-2006, 02:45 PM   #11
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Quote:
Stock lifters are good to about 6500. Above that they tend to disintegrate and CC lifters should be used.
So it'* probably a good I idea to get aftermarket lifters if shifts are gonna hit @ 6400? & a rollermaster single timing chain should be fine?
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Old 01-29-2006, 04:33 PM   #12
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Quote:
Originally Posted by corvettecrazy
I have a cam question that is a little off topic but along the same lines:

If you were swap a mild cam into a L67 is it still reccomended to change the lifters, springs, timing chain, push rod etc??
We put an XP cam in the GTP, and we ran stock everything. We are still running the original timing chain and timing gears, and we are running the original lifters as well. The only thing we really replaced other than the cam was the timing chain tensioner. About 8k miles later the car is still running great. Before the cam we spun the engine to 6600rpms with no problems, and since we haven't had the PCM reflashed yet we still spin it to the same 6600rpms and still have no problems. But, springs are a must, I would never run an aftermarket cam with stock springs. We are running 90lb. springs with modified retainers (for the extra clearance) and OR pushrods in the GTP.

While I don't really recommend for people to change their cam and keep all those stock parts, it can be done with good reliability. The only reason we did this is because the car was fairly low miles (I don't remember exact miles, somewhere in the 25k range) so the parts were pretty new. On an older car with more miles I'd definately replace most of that stuff.

Shawn
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Old 01-29-2006, 08:12 PM   #13
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The only time a stock lifter will destroy itself is when you cant hold the oil pressure. The comp. cam lifters will actually destroy themselves with or without oil. Intense knows this, but selling a set of lifters is ~175 and and oil pressure kit is ~30. I was told this from an Intense affiliate!

ZZP still runs stock lifters shifting at 7k rpm.

I got a set of comp cam lifters somebody can have for $75 shipped. I WONT run them.
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Old 01-30-2006, 09:16 AM   #14
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Quote:
Originally Posted by GTPboy
The only time a stock lifter will destroy itself is when you cant hold the oil pressure. The comp. cam lifters will actually destroy themselves with or without oil. Intense knows this, but selling a set of lifters is ~175 and and oil pressure kit is ~30. I was told this from an Intense affiliate!

ZZP still runs stock lifters shifting at 7k rpm.

I got a set of comp cam lifters somebody can have for $75 shipped. I WONT run them.
Do you have any proof of this, or is this just hearsay? Are you willing to state your source?
Assuming it IS true, what solution do you suggest?

The reason I ask this is that we have a few cars running this setup problem-free here.
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Old 01-30-2006, 11:07 AM   #15
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Back to what I was asking..... It would be a good idea to have CC lifters if I'm going to be shifting @ 6400 with the Xp? & a single rollermaster timing chain would work well too? Aside from getting these parts to replace stock(high mileage) componets, the CC lifters are a improvement over OEM?
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Old 01-30-2006, 11:27 AM   #16
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Quote:
Originally Posted by McGrath
Back to what I was asking..... It would be a good idea to have CC lifters if I'm going to be shifting @ 6400 with the Xp? & a single rollermaster timing chain would work well too? Aside from getting these parts to replace stock(high mileage) componets, the CC lifters are a improvement over OEM?
Again, stock lifters are good up to about 6500. You should be good with stock and 6400 shift points. Single rollmaster chain is HIGHLY recommended with ANY aftermarket cam and I would suggest CC 105# springs as well (with CC LS1 retainers). Stock keepers should be fine.

The CC lifters hold together better at higher RPM so if you plan on spinning the motor past 6500 in the future you may want to go ahead and put those in now.
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Old 01-30-2006, 03:39 PM   #17
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I'm sorry I'm not going to reveal who told me.

There are a couple posts/threads about CC'* having problems on clubgp.

I'm NOT saying every comp cam lifter will do that, they are just more prone. IMHO

I have seen 2 cracked stockers and one calapse (NO oil pressure) lost the engine also.

Get an oil pressure kit and run stockers, you'll be fine. unless somebody really wants to buy my Comp cam lifters-lol.
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Old 01-30-2006, 04:21 PM   #18
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An OEM roller lifter works great in high RPM applications when they are modified.

I always recommend Sherman Products for having hydraulic type lifters modified for high RPM use. They modify hydraulic lifters for FAST, NHRA and IHRA Stock Eliminator class cars. They rework OEM GM hydraulic roller lifters for the LT-1 and LS-1 engines. They can be reached at:

Sherman Racing Products
P.O. Box 1326
3245 Hwy. 1 South
Donaldsonville, LA 70346
Cliff Sherman (225) 473-4923 or (225) 717-1460
J. Allen Sherman (225) 717-146
Email: [email protected]
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