Cam Lobe Wiped
Thread Starter
Advanced
Joined: Sep 2000
Posts: 94
Likes: 0
Cam Lobe Wiped
I installed a xe-262 Comp Cam in my 77 vette around 4 years ago. I haven't put on a great deal of mileage and now #7exh lope is wiped. Has anyone had a problem with Comp Cams? What new cam would you recommend. It'a a 77 L-48 with performer intake and QJ, 4 speed. When I installed it, I bought the kit: cam, lifters and springs. The engine ran smooth until the lope wiped.
Thanks
Thanks
Tech Contributor
Joined: Aug 1999
Posts: 15,154
Likes: 3,959
From: Connecticut, USA
Last edited by gtr1999; Aug 22, 2005 at 04:44 PM.
Melting Slicks
Joined: Jan 2003
Posts: 2,804
Likes: 1
From: OKC Oklahoma
Originally Posted by desi
What are signs of a wiped lobe cam? Is it obvious to detect?
I installed one about 500 miles ago, and it runs like crap.
I installed one about 500 miles ago, and it runs like crap.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by desi
What are signs of a wiped lobe cam? Is it obvious to detect?
I installed one about 500 miles ago, and it runs like crap.
I installed one about 500 miles ago, and it runs like crap.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by wes77
The engine was popping through the carb and #7 exhaust rocker arm was not opening and closing
and adjusting it does nothing right? ......well that sure sounds like a wiped lobe...
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Melting Slicks
Joined: Jun 2003
Posts: 2,802
Likes: 241
From: Niles, MI
Originally Posted by wes77
I installed a xe-262 Comp Cam in my 77 vette around 4 years ago. I haven't put on a great deal of mileage and now #7exh lope is wiped. Has anyone had a problem with Comp Cams? What new cam would you recommend. It'a a 77 L-48 with performer intake and QJ, 4 speed. When I installed it, I bought the kit: cam, lifters and springs. The engine ran smooth until the lope wiped.
Thanks
Thanks
I just installed the exact same cam this past spring! I've been drivin' it all summer. So far so good.... 
Racer
Joined: Jan 2005
Posts: 492
Likes: 0
From: Birmingham AL
Originally Posted by wes77
I installed a xe-262 Comp Cam in my 77 vette around 4 years ago. I haven't put on a great deal of mileage and now #7exh lope is wiped. Has anyone had a problem with Comp Cams? What new cam would you recommend. It'a a 77 L-48 with performer intake and QJ, 4 speed. When I installed it, I bought the kit: cam, lifters and springs. The engine ran smooth until the lope wiped.
Thanks
Thanks
* XE268H wiped during break-in #8 exh, first 30 minutes of run time and yes, I followed the procedure
* Worked with Summit and they replaced it with a Lunati with no trouble
* I would be able to tell you how it went except an electrical problem popped up and I couldn't start the car, hope to tomorrow now that I found that and will report on the results
I just lost all confidence in Comp right now. If you have a cam and are good, you're probably ok. But they seem to have quality control issues with the match between cam and lifter IMHO. Somone mentioned crown spec issues a couple weeks back and that sounds believable to me.
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by 79VetteMike
the signs are that the part number begins with XE....
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Aggressive ramps never seem to last too long on street cams for some reason. I suffered a few broken dampners too after 300 miles(yes, the springs were set up right). That's unacceptable IMO-Comp 284 XE
Le Mans Master
Joined: Mar 2004
Posts: 7,463
Likes: 1,485
From: Little Rock AR
Originally Posted by mandm1200
I'm glad you said it and not me! From what I know about and heard about these cams there is a risk in using them. Let me rephrase that. I have no experience with them but have heard plenty of the wiped lobe threads. The cam is highly aggressive in the ramp. Most people do not have a problem with them. Some may not break them in properly and others may have other issues that lead to premature wear. When things go all right, one could expect to get a few more ponies versus a more conventional cam with less aggressive ramps. There was a recent poll on the forum and the results were in my opinion not the good. Using one of these performance cams is taking a higher risk. That does not mean everyone will fail, nor does it mean that a majority will fail. It means that cam failure will occurr more frequently than most other cams.
But nobody seems to be worried untill after the lobes get round. OH WELL! 
-Mark.
Racer
Joined: Jan 2005
Posts: 492
Likes: 0
From: Birmingham AL
Originally Posted by cuisinartvette
Aggressive ramps never seem to last too long on street cams for some reason. I suffered a few broken dampners too after 300 miles(yes, the springs were set up right). That's unacceptable IMO-Comp 284 XE
Instructor
Joined: Jul 2005
Posts: 220
Likes: 0
From: Oakdale Ca
I guess your humor button is turned off.
BTW, roller does allow quicker ramps, better torque cures, etc, all with a "small" profile that aids in drivability through out the RPM range.
Besides, it's just cool to say.."I have a roller cam in there"
BTW, roller does allow quicker ramps, better torque cures, etc, all with a "small" profile that aids in drivability through out the RPM range.
Besides, it's just cool to say.."I have a roller cam in there"
Burning Brakes
Joined: Oct 2004
Posts: 763
Likes: 0
From: Loveland Colo
Well that does it. The XE262 on the bench sho nuff AIN'T goin' in my car. I'll go back and find yet another one.....
Anybody wanna buy a still-in-the-box XE cam? I'll make you a good deal! (No, I couldn't sell it to anyone here: first, nobody here would buy it anyway, but I wouldn't be able to show my face here anymore either. Guess I'll throw it out in the back yard, let the roses grow on it and call it a "sculpture.")
John
Anybody wanna buy a still-in-the-box XE cam? I'll make you a good deal! (No, I couldn't sell it to anyone here: first, nobody here would buy it anyway, but I wouldn't be able to show my face here anymore either. Guess I'll throw it out in the back yard, let the roses grow on it and call it a "sculpture.")
John