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-   -   Comp Cams short travel lifter question (https://classracer.com/classforum/showthread.php?t=61973)

Todd Gross 04-22-2016 09:16 PM
Comp Cams short travel lifter question
 
Has anyone used Comp Cams short travel hydraulic lifters? Can they be used as is, or do they need modification?
They appear to have more plunger travel than a Sherman type lifter.
My concern is I have a COPO customer that I ran his engine on the Dyno with these lifters w/ .010 preload (as per comp) and it lost a lash cap.
No one from Comp can seem to tell me how much plunger travel these things have. Reason for concern, any open valve spring pressure while sitting causes plunger to collapse until oil pressure comes up, leaving substantial lash.
Thanks- T.G.

pmrphil 04-22-2016 09:34 PM
Re: Comp Cams short travel lifter question
 
They do make a couple different styles, short(or reduced) travel, and limited travel. The reduced travel lifters I have will move approx. .065 before solid. The limited travel I believe are listed as either .015 or .025, not sure which.

J.R. Haddad 04-22-2016 09:36 PM
Re: Comp Cams short travel lifter question
 
68 thou. Measured them in a fixture. J.R.

Todd Gross 04-22-2016 10:51 PM
Re: Comp Cams short travel lifter question
 
Thanks guys*

GTX JOHN 04-23-2016 04:27 AM
Re: Comp Cams short travel lifter question
 
I had nothing but constant trouble with them:

1 Retaining clips were tin rather than a clip and broke several while breaking in.

2 Some Lifters would pump down a few seconds after preoiling and
bend pushrods upon cranking.

3 Some leaked a lot of oil around plunger.

4 Varied in plunger travel a LOT!

I posted about their quality control last year.....Tech line was ZERO help.
Left several messages for Tim Cole and never received a
return call.

Two sets currently residing my weight box.

Allen Sherman 04-23-2016 10:42 PM
Re: Comp Cams short travel lifter question
 
They're definitely more travel than the lifters my dad and i do, I've measured some that had as much as .090" travel. We keep ours at .020" or less and can customize them if customers prefer more or less travel.

pmrphil 04-27-2016 08:45 AM
Re: Comp Cams short travel lifter question
 
Quote:
Originally Posted by GTX JOHN (Post 501531)
I had nothing but constant trouble with them:

1 Retaining clips were tin rather than a clip and broke several while breaking in.

2 Some Lifters would pump down a few seconds after preoiling and
bend pushrods upon cranking.

3 Some leaked a lot of oil around plunger.

4 Varied in plunger travel a LOT!

I posted about their quality control last year.....Tech line was ZERO help.
Left several messages for Tim Cole and never received a
return call.

Two sets currently residing my weight box.
Hey John - which lifters did you try? I don't see any short travel lifters listed for Mopar. I've used the short travel lifters for the Chevy without any issues, but the preload had to be set right, and I'm kinda picky about spring pressures, too.
P.S. Hard to believe that Tim didn't return a call, he's ALWAYS returned every call I made, a couple times it was the next day, but still called back.
Phil

Todd Gross 04-27-2016 11:30 PM
Re: Comp Cams short travel lifter question
 
Quote:
Originally Posted by pmrphil (Post 501885)
Hey John - which lifters did you try? I don't see any short travel lifters listed for Mopar. I've used the short travel lifters for the Chevy without any issues, but the preload had to be set right, and I'm kinda picky about spring pressures, too.
P.S. Hard to believe that Tim didn't return a call, he's ALWAYS returned every call I made, a couple times it was the next day, but still called back.
Phil
Hi Phil, I left messages for Tim, Derrick and others and received no return calls...even as of today, 3 business days, no return correspondence. I did talk to a general tech guy on Friday after being on hold for 25 minutes who stated he was not qualified on the subject and intended on finding someone to call me back, but....not. End result I spent Saturday tearing my customer's engine down and replacing the Comp lifters with last years GM / Sherman tray lifters so he could make it to Indy this weekend..


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