Re: Roller Rockers in Stock
 

I don't mean to help jump the thread off-track, but I was at one of the F.A.S.T. (Factory Appearing Street Tire) races about a year ago at US-131 Dragway. I saw a couple of the cars running 130+ MPH on basically bald red lines, which is probably a recipe for disaster. The engine's looked stock, but internally were mechanical roller with 500+ cubic inches and sky high compression ratios.

Re: Roller Rockers in Stock
 

Little info from experience with roller rockers on a FE Ford stocker, back to back with "stock" rockers verse's Harland Sharp roller rockers, on the track.........= 0, nothing...I don't maybe I needed to change the jetting and timing and collector choke size and tire pressure and piston rings and .....to take advantage of the rollers.....I dunno....

Re: Roller Rockers in Stock
 

I wouldn't have a problem at all running Crane "Gold" at all. That was the standard in SS for decades before shaft rockers became the standard.

Re: Roller Rockers in Stock
 

When will NHRA release the 2012 rules revision?

Re: Roller Rockers in Stock
 

Probably at or after the PRI Show in Orlando in December.

Re: Roller Rockers in Stock
 

They usually have the new rule books at SEMA if you are one of the blessed ones!

Re: Roller Rockers in Stock
 

Why are so many against this ?
There's no real performance advantage ( ok... 3 HP )
I for one, welcome this with open valve covers.
My engine will damage a stamped steel rocker on the intake side, about every 4 runs.
Last year, I put on a set of rollers, with intention of going to Edmonton ( IHRA )
Engine is absolutely trouble free since then.

Re: Roller Rockers in Stock
 

They did not this year.

Re: Roller Rockers in Stock
 

I'm personally against because of the added expense to upgrade. I already spent a fair amount of money to get the stock stuff to work, and now they (NHRA) turn around and legalize roller rockers. To update my Olds, I'll have to get guide plates, screw-in studs and new hardened pushrods as well. Plus, it's just one step closer to Super Stock.

Re: Roller Rockers in Stock
 

Aubrey, if you're damaging a stamped rocker every 3-4 runs, you have a serious problem, and the roller rockers are merely a band aid. How many passes do you have since the roller rockers were installed?

Do you have an old Chevrolet Power Manual? If you do, go back and read the section on valvetrain for the big block Chevy, since your valvetrain is very similar. Pay particular attention to the part about roller rockers and 7/16" rocker studs with high valvespring pressures.

I think we figured up we had about 500 passes on our original rockers when we replaced them. They did not have an insert welded in them, I polished the burr off of the pierced hole over the pushrod cup. We eventually wore the rockers out, the tips, balls and ball seats were just worn out. We ran near 550# open pressure, and turned 7700 or more in the lights every pass.