Need some opinions on rocker arms?
 

I did a search and nothing came up. I'm building a new forged motor and need some input on the harland sharp and Yella Terra rocker arms? Need to know the pros and cons of both. I'm staying with a 1.7 ratio due to the large cam shaft and patriot gold double valve springs.

What i need to know is their issues with valve cover clarance with either rocker and durability is a factor since the motor will see 7000 rpm shift points.

Just send your rockers to NASTy PERFORMANCE for a Harland Sharp rebuild. New trunions and C-clips (no more spilt bearings).
That way you keep the lightest rockers that are on the market today.
~ $260

I went with the Yella Terra's and have had no problems since the install along w the TR224. I only think the 98 peremiter style heads need clearancing with these. They are a nice stout piece and seem very well made. I got a very good deal on mine and got them for peace of mind on the needle bearing issue. On my Marine SBC's i've always used full roller valvetrains and wanted likewise on the LS1. I did notice a reduction in valvetrain noise after adding them over the stock rockers.

Supposed downside is that they are heavier than stock over the valve and MIGHT lead to valvefloat on a setup that is pushing the limits of the desired springs ability. I've never had a problem with my former 918's or current PP golds. As to power gains I think someone produced back to back 4rwhp gains with roller rockers over his stockers.

Scott, if your running a big cam along with the gold springs, your probablly going to run into valve float issues. HS's and YT's are both heavier over the valve and can cause unstableness in the valvetrain. If you must run a roller rocker, I'd look into the Comp's, but my suggestion would be to do what PREDATOR said and send them into to Nasty Performance. The stock rockers have proven to be excellent pieces if you can keep the needle bearings from falling out. The Harlan rebuild on them prevents that.

so the only benefit is the weight factor

>No, it keeps your stock ratio and geometry.
>It prevents the rockers from spilling bearings (the only minus side in stockers)
>The weight factor of the effective moving valvetrain is one of the most neglected area in aftermarket swaps, while it should be a very important issue with cams reving 6300 or more.

I guess i'll send them into nasty performance. I'm wanting the lightest rocker to keep valve float out since it will be a all out setup.

You can get the Jesel lightened Mohawk series like I did. There only $1500. :)

That is what I plan on doing as well. Predator did you do this too?

HAHA! not right now. I already got enough going on money wise :bang:

You and me both. If my wife knew how much i was really spending on this build, I'd be sleeping outside. :cry:

Yeap, the Z has them.