roller rockers for 91 L98?
Thread Starter
Instructor
Joined: Nov 2002
Posts: 159
Likes: 0
From: Lusby MD
roller rockers for 91 L98?
Can someone give me advice on a good set of roller rockers (1.6 preferrably) for a 91 L98, w aluminium heads. Looking for a set that will go in with minimal trouble, possibly intake only, my exhaust has been modified(Hooker Super Comp headers, 3"y-pipe, cat delete, flomaster 40 Series). Also can I use stock springs? if not where can I get easily order the rockers and springs together.
Thanks
:seeya
Thanks
:seeya
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: roller rockers for 91 L98? (Rays91L98)
I run Comp Cam Pro Magnum 1.6 full roller rockers on my 113 heads. They require you to clearence the inside of the valve cover. You won't want the stock springs in there. :)
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: roller rockers for 91 L98? (Rays91L98)
With L98's you can reuse the stock spring with 1.6RR if you have the stock cam. If you have high miles you probably wan tot replace the springs while your at though.
Pro
Joined: Oct 1999
Posts: 515
Likes: 0
From: Nashua NH
Re: roller rockers for 91 L98? (Rays91L98)
Jeg's, Summit, PAW.... any catalog hi-perf place or even a local speed shop. I got mine from Jeg's; $260
As far as springs...they depend on what you are running for a cam. I'm sure if you speak to someone in their tech department, they will suggest a set. You could also call Comp Cams cam help line 800-999-0853 they could steer you in the right direction.
[Modified by Mark85Vett, 12:24 PM 5/12/2003]
[Modified by Mark85Vett, 12:25 PM 5/12/2003]
As far as springs...they depend on what you are running for a cam. I'm sure if you speak to someone in their tech department, they will suggest a set. You could also call Comp Cams cam help line 800-999-0853 they could steer you in the right direction.
[Modified by Mark85Vett, 12:24 PM 5/12/2003]
[Modified by Mark85Vett, 12:25 PM 5/12/2003]
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: roller rockers for 91 L98? (Rays91L98)
To avoid removing the rocker studs I suggest Comp Cams self-aligning ProMagnum 1.6:1 RRs for 3/8" studs. I believe you can use the stock pushrods though hardened ones would be nice.
Comp Cams also has a nice set of springs, variety shim pack and new machined locks to round out the package. A little tube of light assembly lube for the pushrod & valve tips will assure a nice break-in of the new parts.
You can order all those directly from Comp Cams for good price, service and maybe better inventory control than a vendor.
It would be a good idea to replace the upper & lower oil seals (here I used GM parts from my local Chevy dealer) and toss the tin oil shedders from atop the valve springs.
With your #113 heads & a stock cam, don't worry about using 1.6 RRs on exhaust with headers; they will work well on int & exh. It was the early L98 iron heads that gave a lumpy idle with 1.6s on the exh.
As mentioned you will need to remove/reduce the drip tabe under the valve covers and likely narrow the bolt tower sides too for clearance of the new RRs.
Comp Cams also has a nice set of springs, variety shim pack and new machined locks to round out the package. A little tube of light assembly lube for the pushrod & valve tips will assure a nice break-in of the new parts.
You can order all those directly from Comp Cams for good price, service and maybe better inventory control than a vendor.
It would be a good idea to replace the upper & lower oil seals (here I used GM parts from my local Chevy dealer) and toss the tin oil shedders from atop the valve springs.
With your #113 heads & a stock cam, don't worry about using 1.6 RRs on exhaust with headers; they will work well on int & exh. It was the early L98 iron heads that gave a lumpy idle with 1.6s on the exh.
As mentioned you will need to remove/reduce the drip tabe under the valve covers and likely narrow the bolt tower sides too for clearance of the new RRs.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
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
Drifting
Joined: Jul 2001
Posts: 1,511
Likes: 1
From: Winter Park Fl
Re: roller rockers for 91 L98? (scorp508)
I USED THE CC MAGNUM 1.6:1 ROLLER TIP ROCKERS ON MY '91. THE VALVE COVERS REQUIRED NO TRIMMING. HARDENED PUSH RODS AND GUIDEPLATES Were necessary., the new rockers are not self-aligning like the originals. I have a stock cam and valve springs.
Good luck with your project,
[Modified by C44ever, 1:33 PM 5/12/2003]
Good luck with your project,
[Modified by C44ever, 1:33 PM 5/12/2003]
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
Re: roller rockers for 91 L98? (Rays91L98)
just remember to get the self-aligning type of rocker arms or convert what you have to guides. I'm using the comp cams SS 1.6 full rollers. stay away from the cheap al rockers...you get what you pay for. Stick with Compcams, Crane, or GM performance Parts (LT4 roller)
w
w
