Comp XE Users
Last edited by Bizzzatch350; Nov 19, 2003 at 10:31 AM.
I've got some things on the table I need to figure out so I need to see what kind of springs guys are running with these aggressive lobes to get an idea on some things... Springs are comp 977's, installed height is 1.85. Average seat pressure (measured) was 162psi. At 0.600" compression average pressure was 426psi.
I am running these with comp R lifters. Haven't bolted on the blower, but NA haven't had any problems

I would run the comp 977's for sure in your position.
Springs are comp 977's, installed height is 1.85. Average seat pressure (measured) was 162psi. At 0.600" compression average pressure was 426psi.
I am running these with comp R lifters. Haven't bolted on the blower, but NA haven't had any problems

I would run the comp 977's for sure in your position.
I sent you an email this morning. Did'ja get it?
Thanks for the info. Are you running comp r's for insurance or....? I need to control the spring and thats where we may be running into issues. Right now I've got a few different cams on the table I'm looking at but we are limited severely on springs (Don't have room for a serious spring). Since my heads have the incredible low lift we are looking at the XE series stuff since the ramps are so aggressive and works within my limitations of the puter.
P.S. Rick used stock lifters in "TheTurtle's" old motor(383 and 306 cam and spun it to 6800 RPM's all the time) and never had an issue.
I'm just running the comp R's because I had 100k on the old lifters, and figured I might as well swap over. Basically cheap insurance. The 430lb spring pressure was pretty high though, don't know how the stock lifter would have been working against that - and didn't want to find out
. What's the biggest diameter spring you can fit?
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I'm just running the comp R's because I had 100k on the old lifters, and figured I might as well swap over. Basically cheap insurance. The 430lb spring pressure was pretty high though, don't know how the stock lifter would have been working against that - and didn't want to find out
. What's the biggest diameter spring you can fit?
Anyway, if I can find a deal on some R's I will be otherwise I'll just re-use the stock style. I have a brand new set anyway.
The biggest diameter spring I can fit is about 1.3. Yea, I know...
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Comp "R" lifters. times in sig are N/A.
Ken




