|
04-22-2016, 09:16 PM | #1 |
Member
Join Date: Mar 2016
Location: Crete, IL
Posts: 167
Likes: 212
Liked 56 Times in 24 Posts
|
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. |
04-22-2016, 09:34 PM | #2 |
Member
Join Date: Aug 2010
Location: CT
Posts: 386
Likes: 1,257
Liked 248 Times in 107 Posts
|
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.
__________________
Phil Molski S/C 1623 |
04-22-2016, 09:36 PM | #3 |
Senior Member
Join Date: Jun 2012
Posts: 625
Likes: 517
Liked 879 Times in 196 Posts
|
Re: Comp Cams short travel lifter question
68 thou. Measured them in a fixture. J.R.
|
04-22-2016, 10:51 PM | #4 |
Member
Join Date: Mar 2016
Location: Crete, IL
Posts: 167
Likes: 212
Liked 56 Times in 24 Posts
|
Re: Comp Cams short travel lifter question
Thanks guys*
|
04-23-2016, 04:27 AM | #5 |
VIP Member
Join Date: Jun 2009
Location: Boulder City, Nevada 89005
Posts: 2,530
Likes: 2,222
Liked 1,809 Times in 572 Posts
|
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.
__________________
John Irving 741 Stock 741 Super Stock |
04-23-2016, 10:42 PM | #6 |
Member
Join Date: Dec 2001
Posts: 147
Likes: 0
Liked 5 Times in 3 Posts
|
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.
|
04-27-2016, 08:45 AM | #7 | |
Member
Join Date: Aug 2010
Location: CT
Posts: 386
Likes: 1,257
Liked 248 Times in 107 Posts
|
Re: Comp Cams short travel lifter question
Quote:
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
__________________
Phil Molski S/C 1623 |
|
04-27-2016, 11:30 PM | #8 | |
Member
Join Date: Mar 2016
Location: Crete, IL
Posts: 167
Likes: 212
Liked 56 Times in 24 Posts
|
Re: Comp Cams short travel lifter question
Quote:
|
|
|
|