Anyone using Summit 1.8 roller rockers?
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
Anyone using Summit 1.8 roller rockers? Using this $370 kit.
https://www.summitracing.com/parts/sum-g6981/overview/
They claim there is no need to clearancing and that they are a direct drop in with factory bolts and valve covers. I noticed the corner Rockers only have .020-.025 ish clearance between the heads valve cover perimeter surface and the rear of the rocker arm. Is this enough? Makes me nervous.
I'll try to get a better pic tonight.
https://www.summitracing.com/parts/sum-g6981/overview/
They claim there is no need to clearancing and that they are a direct drop in with factory bolts and valve covers. I noticed the corner Rockers only have .020-.025 ish clearance between the heads valve cover perimeter surface and the rear of the rocker arm. Is this enough? Makes me nervous.
I'll try to get a better pic tonight.
Last edited by Forcefed86; Mar 28, 2017 at 11:38 AM.
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
My fault, fixed it.
these...
https://www.summitracing.com/parts/sum-g6981/overview/
Picked them up from 91LT16SpeedFormula in the classifieds a few weeks back for $200 shipped. Figured I'd give them a try.
these...
https://www.summitracing.com/parts/sum-g6981/overview/
Picked them up from 91LT16SpeedFormula in the classifieds a few weeks back for $200 shipped. Figured I'd give them a try.
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
Story of my life right there! Which ones do you think they are?
I did an ebay search first and didn't see anything close. The pro comp steel deals are the only ones I saw cheaper.
I did an ebay search first and didn't see anything close. The pro comp steel deals are the only ones I saw cheaper.
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
Still scored them for $200 shipped! woot!
The installation PDF almost makes you think it’s US made.
Then at the very bottom it says
Who buys aftermarket rockers to stay below 6500 rpm?
The installation PDF almost makes you think it’s US made.
Congratulations. you have just purchased the very best LS 1 ·LS6 Vortec, 4800, 5300, 6000 rocker arm,
money can buy. These rockers are designed and engineered by some of the best engine builders In
the country. That Is why you can just bolt them on. All the checking has been completed for you on
your OEM application. You will not have to change pushrods or add guide plates, or rocker studs, not
even valve cover spacers. These rockers use the factory bolts torqued to factory specifications.
money can buy. These rockers are designed and engineered by some of the best engine builders In
the country. That Is why you can just bolt them on. All the checking has been completed for you on
your OEM application. You will not have to change pushrods or add guide plates, or rocker studs, not
even valve cover spacers. These rockers use the factory bolts torqued to factory specifications.
These rockers are designed for stock application. We do not recommend turning over 6,5OO rpm on
stock applications.
stock applications.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
They' made b Scorpion. I used to have a set a very long time ago when they were prone to breaking at the cups. I broke several and summit reimbursed be for the set.
I will say this, they installed amazingly with no issues. The wipe was dead center on every valve. And they've upgraded the design since. I'd recommend them to anyone who doesn't have a ton of spring pressure, as long as they're still not prone to breakage.
I will say this, they installed amazingly with no issues. The wipe was dead center on every valve. And they've upgraded the design since. I'd recommend them to anyone who doesn't have a ton of spring pressure, as long as they're still not prone to breakage.
Thread Starter
Joined: May 2011
Posts: 8,485
Likes: 1,028
From: Wichita, KS
I'll find out! I have another mild LS with the Howards version of the GM hotcam (much lower lift) I can throw them on that if reliability becomes an issue. Could do a back to back with OEM rockers too and see what I pickup.
I wouldn't hesitate to use them with a low lift, mild ramp etc.. cam.
I've used several sets over the years other than the High $$$ shaft mounts and these were great. No shimming, fit under the valve covers without issues.
I've used several sets over the years other than the High $$$ shaft mounts and these were great. No shimming, fit under the valve covers without issues.
TECH Fanatic
Joined: Jul 2007
Posts: 1,802
Likes: 332
From: Wilmington, De
