LS1 Scorpion Rockers 
Scorpion rockers
I've had a set of 1.7's on my car for about 2 years and haven't had any issues. The only problem I had was that a few of them working making contact with the valve covers. I clearanced the areas that were making contact and it has been fine since.
I can't say I noticed a significant difference. I'm running dual springs though not sure there's much that can be done to quiet them down.
Last edited by mtjoy; May 17, 2009 at 12:51 AM.
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i had scorpions, but got rid of them. i dont know what it was, but on 2 different sets from scorpion the trunnion bearings got tight on most of them (over 10 both times) usually 2 were fine, a couple were getting tough to turn, and the rest i couldnt do it by hand. they warrantied both sets, but i didnt want to try a 3rd set, so i sold them. went back to the stock rockers and never had a problem (changed out to rollers with the 402 though). scorpion looked at both sets and didnt know why it happened, they were the updated ones too.
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Going to aftermarket rockers is a wated expense. It has been shown to only hurt valvetrain stability because it put extra weight over the tip of the valves and doesn't yeild anything in return.
The only downside to the factory rocker arms is their needle bearings, which Harland Sharp can rebuild and make bullet proof.
You never hear of a factor rocker arm breaking, but read once a week about the aftermarket ones breaking.
If they are fine for the Z06 and ZR-1 vettes, they are good enough for your f-body.
The only downside to the factory rocker arms is their needle bearings, which Harland Sharp can rebuild and make bullet proof.
You never hear of a factor rocker arm breaking, but read once a week about the aftermarket ones breaking.
If they are fine for the Z06 and ZR-1 vettes, they are good enough for your f-body.
Going to aftermarket rockers is a wated expense. It has been shown to only hurt valvetrain stability because it put extra weight over the tip of the valves and doesn't yeild anything in return.
The only downside to the factory rocker arms is their needle bearings, which Harland Sharp can rebuild and make bullet proof.
You never hear of a factor rocker arm breaking, but read once a week about the aftermarket ones breaking.
If they are fine for the Z06 and ZR-1 vettes, they are good enough for your f-body.
The only downside to the factory rocker arms is their needle bearings, which Harland Sharp can rebuild and make bullet proof.
You never hear of a factor rocker arm breaking, but read once a week about the aftermarket ones breaking.
If they are fine for the Z06 and ZR-1 vettes, they are good enough for your f-body.
Beleive what you what, but unless you're running a 0.700" lift cam, the valve guides aren't an issue.
I spent hours trying to shim my stock rockers to get an acceptable geometry, in the end I gave up and went aftermarket. I found the wipe pattern to be wide and in some cases it was not in full contact, i.e, the contact patch was towards the front/back of the valve stem. I am now running the YT's and they set up with a very narrow wipe and seem to respond much better to height adjustments with shims. While I think the stock rockers are a nice light design, I couldn't get them to work so I felt comfortable installing them.
