Which hydraulic roller lifters do you recommend?
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 3,409
Likes: 400
From: Lakeville MI
Which hydraulic roller lifters do you recommend?
If you've seen my other posts, it looks like I will be needing new lifters. I've seen some negative posts regarding comp R's. Any positive suggesions? Car is an 88 L98, with Comp 224/230 cam. I see comp 850-16 and crane for under $200, Comp 875-16, and GMPP for around $240. Oem around $100. Any thoughts from the forum?
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 3,409
Likes: 400
From: Lakeville MI
Thanks for the replys, some positive feedback for the GMPP!
I'm currently leaning towards the Comp 850-16s I see for $178 shipped with a free Comp t-shirt.
Since I'm in Michigan, I've got some time to think it over before vette season begins around May.
I guess I have to step up my search for an accel base, now that I'll be pulling the intake soon...
I'm currently leaning towards the Comp 850-16s I see for $178 shipped with a free Comp t-shirt.
Since I'm in Michigan, I've got some time to think it over before vette season begins around May.
I guess I have to step up my search for an accel base, now that I'll be pulling the intake soon...
Racer
Joined: Dec 2003
Posts: 454
Likes: 0
From: Double Oak TX
Originally Posted by tequilaboy
Thanks for the replys, some positive feedback for the GMPP!
I'm currently leaning towards the Comp 850-16s I see for $178 shipped with a free Comp t-shirt.
Since I'm in Michigan, I've got some time to think it over before vette season begins around May.
I guess I have to step up my search for an accel base, now that I'll be pulling the intake soon...
I'm currently leaning towards the Comp 850-16s I see for $178 shipped with a free Comp t-shirt.
Since I'm in Michigan, I've got some time to think it over before vette season begins around May.
I guess I have to step up my search for an accel base, now that I'll be pulling the intake soon...
Comp R's will work great but must be set just right and there is some debate over olders ones being better than new ones. Morrell right now is considered the primo lifter.
Did a dyno test on Morrell vs. Comps and up to 7200 rpm there was no difference in power. Decided to use the Morrells.
Now springs.... that's another subject all together different.
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Morrell gets a vote from me!
CompCams lifters suck!!!
Their excuse to me was you have to fire up the motor within 6 mths or the lifters rust?
Hu What?your lifters have a shelf life of 6 mths?
At least they sent me new ones,at no charge.
CompCams lifters suck!!!
Their excuse to me was you have to fire up the motor within 6 mths or the lifters rust?
Hu What?your lifters have a shelf life of 6 mths?
At least they sent me new ones,at no charge.
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Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
OE style roller lifters would work fine in your car. I don't recommend using the Comp 875-16 which are the Comp R lifters. There are race lifters and they need attention from time to time. Most of the failures that you hear about is due to mis-adjustment of the preload on these lifters. They are finicky to say that least and careful preloading is mandated. Otherwise failures can and will result. I have them running in three engines, my personal engine has had them for years without any issues.
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Originally Posted by REDC4CORVETTE
Morrell gets a vote from me!
CompCams lifters suck!!!
Their excuse to me was you have to fire up the motor within 6 mths or the lifters rust?
Hu What?your lifters have a shelf life of 6 mths?
At least they sent me new ones,at no charge.
CompCams lifters suck!!!
Their excuse to me was you have to fire up the motor within 6 mths or the lifters rust?
Hu What?your lifters have a shelf life of 6 mths?
At least they sent me new ones,at no charge.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Originally Posted by tequilaboy
Since I'm in Michigan, I've got some time to think it over before vette season begins around May.
I guess I have to step up my search for an accel base, now that I'll be pulling the intake soon...
I guess I have to step up my search for an accel base, now that I'll be pulling the intake soon...
Morrells, if I remember were pretty pricey, definitely nice product.
If the weather here keeeps this up we may be getting spring weather sooner than usual
Le Mans Master
Joined: Jul 2000
Posts: 5,012
Likes: 5
From: OKC OK
Originally Posted by tjwong
OE style roller lifters would work fine in your car. I don't recommend using the Comp 875-16 which are the Comp R lifters. There are race lifters and they need attention from time to time. Most of the failures that you hear about is due to mis-adjustment of the preload on these lifters. They are finicky to say that least and careful preloading is mandated. Otherwise failures can and will result. I have them running in three engines, my personal engine has had them for years without any issues.
and Comp Rs or Morels aren't needed in this application. Go w/ OE replacements and you'll be fine.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by mseven
Since you live here you might want to check out a co. called DFI EFI (located in Mt. clemens or clinton twp.)they advertise on ebay and have had some of the best prices in the accell bases, SR.'s etc.
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
When considering hydraulic rollers, another factor is their leakdown
rate. Matching lifters that leak down more rapidly can help retain
low RPM performance with a cam that might otherwise lack sufficent
manners. This approach can even be used to tune for different I/E
behavior by running differing leakdown rates on intakes/exhausts.
Vizard's How to Build & Modify Chevrolet S-B V-8 Camshafts & V-trains
(ISBN 0-87938-595-2) includes a lengthy, in-depth look at leak-down.
The flip-side is that if you mismatch lifters and cam, you leave performance
on the table.
.
rate. Matching lifters that leak down more rapidly can help retain
low RPM performance with a cam that might otherwise lack sufficent
manners. This approach can even be used to tune for different I/E
behavior by running differing leakdown rates on intakes/exhausts.
Vizard's How to Build & Modify Chevrolet S-B V-8 Camshafts & V-trains
(ISBN 0-87938-595-2) includes a lengthy, in-depth look at leak-down.
The flip-side is that if you mismatch lifters and cam, you leave performance
on the table.
.
Last edited by Slalom4me; Feb 11, 2006 at 12:06 PM.
Racer
Joined: Dec 2003
Posts: 454
Likes: 0
From: Double Oak TX
Originally Posted by Slalom4me
When considering hydraulic rollers, another factor is their leakdown
rate. Matching lifters that leak down more rapidly can help retain
low RPM performance with a cam that might otherwise lack sufficent
manners. This approach can even be used to tune for different I/E
behavior by running differing leakdown rates on intakes/exhausts.
Vizard's How to Build & Modify Chevrolet S-B V-8 Camshafts & V-trains
(ISBN 0-87938-595-2) includes a lengthy, in-depth look at leak-down.
The flip-side is that if you mismatch lifters and cam, you leave performance
on the table.
.
rate. Matching lifters that leak down more rapidly can help retain
low RPM performance with a cam that might otherwise lack sufficent
manners. This approach can even be used to tune for different I/E
behavior by running differing leakdown rates on intakes/exhausts.
Vizard's How to Build & Modify Chevrolet S-B V-8 Camshafts & V-trains
(ISBN 0-87938-595-2) includes a lengthy, in-depth look at leak-down.
The flip-side is that if you mismatch lifters and cam, you leave performance
on the table.
.
As mentioned we did dyno Comp R's and Morells and didn't pick up any difference if each is setup to how they like to be setup. In general a looser lash makes more power but the problem with Comps is.....yes they are very fickle and you need to find of the combination of preload. Too little and they break, too much you loose power. The Morels on the other hand like a little more preload.
Springs make a huge difference. As much as 20-30 hp on top between springs on an engine reving pretty high.
Below 6000 rpm I not so sure there are a whole lot fo differences in lifters or springs that are of a certain quality level and match the combo.
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Originally Posted by comp
thats BS
No BS their.
They would not pump up and 4 the roller did not even move.
He said it was the coating they were using.
Racer
Joined: Oct 2003
Posts: 304
Likes: 0
From: Marlboro NY
If you choose Comp roller lifters be sure they peened the heads of the bolts that retain the t-bar. one bolt on mine came loose and the tbar came off causing the lifter to rotate and wiped the cam and then metal fragments wiped my motor. *solid roller cam. That was at 800 miles. $6500 later its up and running, and I had my guy at the machine shop repeen the new ones just in case.
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Originally Posted by Slalom4me
When considering hydraulic rollers, another factor is their leakdown
rate. Matching lifters that leak down more rapidly can help retain
low RPM performance with a cam that might otherwise lack sufficent
manners. This approach can even be used to tune for different I/E
behavior by running differing leakdown rates on intakes/exhausts.
Vizard's How to Build & Modify Chevrolet S-B V-8 Camshafts & V-trains
(ISBN 0-87938-595-2) includes a lengthy, in-depth look at leak-down.
The flip-side is that if you mismatch lifters and cam, you leave performance
on the table.
.
rate. Matching lifters that leak down more rapidly can help retain
low RPM performance with a cam that might otherwise lack sufficent
manners. This approach can even be used to tune for different I/E
behavior by running differing leakdown rates on intakes/exhausts.
Vizard's How to Build & Modify Chevrolet S-B V-8 Camshafts & V-trains
(ISBN 0-87938-595-2) includes a lengthy, in-depth look at leak-down.
The flip-side is that if you mismatch lifters and cam, you leave performance
on the table.
.
Have you considered the Rhodes lifters? I have no experience with them but I believe the principle behind them is to do what you are suggesting above.