C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Roller rocker install

Thread Tools
 
Search this Thread
 
Old Aug 14, 2022 | 09:34 AM
  #1  
ninety4formula's Avatar
ninety4formula
Thread Starter
Racer
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Sep 2009
Posts: 416
Likes: 1
From: Owego NY
Default Roller rocker install

I have a set of Harland sharp S1005 1.6 roller rockers I am going to install in my 1994. I know I need new rocker studs because these are 7/16 rockers. Are they threaded in with a shoulder on the stock ones? I see that is how the aftermarket ones are. I’m just looking for a “parts list” if you will before I get into the project so I don’t need to go find valve cover gaskets or go to put the valve covers on and they won’t clear the rockers. Any information would be appreciated. Thank you!

https://www.summitracing.com/parts/csp-s1005 these are the rockers I have. I see it doesn’t list the 94 LT1 in the application but wasn’t sure if that was because of the stock smaller rocker studs. These are new but are from a second party.

Last edited by ninety4formula; Aug 14, 2022 at 09:45 AM.
Reply
Old Aug 15, 2022 | 06:29 PM
  #2  
Fiberbundle's Avatar
Fiberbundle
Drifting
Veteran: Army
Conversation Starter
Liked
Loved
 
Joined: Feb 2017
Posts: 1,274
Likes: 399
From: Tacoma WA
2024 C4 of the Year Finalist - Unmodified
Default

I do believe those are only for gen1 SBC and not for the gen2 LT1/LT4 engine.

Call Summit to get the best answers.
Reply
Old Aug 15, 2022 | 07:01 PM
  #3  
'78CorvetteS.A.'s Avatar
'78CorvetteS.A.
Drifting
Shutterbug
Community Favorite
Top Answer: 3
 
Joined: Nov 2018
Posts: 1,759
Likes: 647
From: USA
Default

Originally Posted by ninety4formula
I have a set of Harland sharp S1005 1.6 roller rockers I am going to install in my 1994. I know I need new rocker studs because these are 7/16 rockers. Are they threaded in with a shoulder on the stock ones? I see that is how the aftermarket ones are. I’m just looking for a “parts list” if you will before I get into the project so I don’t need to go find valve cover gaskets or go to put the valve covers on and they won’t clear the rockers. Any information would be appreciated. Thank you!

https://www.summitracing.com/parts/csp-s1005 these are the rockers I have. I see it doesn’t list the 94 LT1 in the application but wasn’t sure if that was because of the stock smaller rocker studs. These are new but are from a second party.
You can use them! You'll need 7/16" top and bottom srcew in studs, "real" guide plates (LT1 stock plates are not suitable) and hardened push rods. Stock lt1 came with self-aligning (SA) rocker arms, your Harland Sharp are non-self-aligning (NSA), thus the reason for guide plates and hardened push rods. You'll want to verify proper push rod length and also if the heads need to be machined down on the rocker arm stud bosses to account for thickness of guide plates and hardware. Be mindful of overall spring diameter and valve cover clearance as well. Do a web search, you'll find an abundance of information on this subject👍
Reply
Old Aug 15, 2022 | 10:32 PM
  #4  
Gale Banks 80''s Avatar
Gale Banks 80'
Safety Car
15 Year Member
Photogenic
Photoriffic
Top Answer: 1
 
Joined: Nov 2008
Posts: 3,717
Likes: 551
From: Seattle Washington
Default

Unless these are Narrow Rockers the stock valve covers are not going to go back on.
Reply
Old Aug 16, 2022 | 08:30 AM
  #5  
drcook's Avatar
drcook
Safety Car
Photogenic
Photoriffic
Liked
Top Answer: 1
 
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
Default

I stole this from another forum. If you do a search you will find lots of information.

use this for a Google search =====>>>> Harland sharp S1005 1.6 roller rockers AND LT1

You might have to do a little trimming

Reply

Get notified of new replies

To Roller rocker install





All times are GMT -4. The time now is 08:33 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE