Nopps

iTrader: (1)

I don't post on this forum much but I do a lot of reading....I cant seem to find what I am looking for this time, maybe someone can give me an answer. I've always been under the impression you can gain a few from shaft mounted roller rockers so I just bought a set of Harland Sharp's...1.71 ratio. A ported Fast 102 is also on the way. I purchased the rockers thinking id see a few more hp after my retune for the Fast manifold. I just read an older post on here thats got me worried...Stating I will actually loose power. True or false? Any input would be great.

here are a few details of what these are going in...

LS2 GTO with an MS3 112 lsa cam, lunati double springs, manley pushrods kooks longtubes, 25% underdrive pulley, double roller, slp oil pump, ect ect ect...car made 431 rwhp/ 411rwtq before....

Gray86hatch

iTrader: (83)

More power prob not.

They are heavier than a stocker and will float the valves sooner. Not sure what the specs are on that cam. I use those springs and they are a good spring.


Tim

Nopps

iTrader: (1)

Thanks for the input...the cam is 237/243 .605/ .611 112+1 lsa...As long as the valves don't float, you don't think I will loose power from the little bit of extra weight right?! If I can get perfect valvetrain geometry Id say they worth keeping. I may sell if it seems like I'm gonna loose any power.

Tainted

iTrader: (9)

YT's quite possibly have the WORST track record of all the rocker arms followed by HS.

Stock with trunion upgrade, much lighter, strong, keeps geometry, and unless you have bronze guides and require a roller rocker, then jesel is where its at.

KCS

iTrader: (20)

I'd go ahead and sell them.

409CISecondGen

iTrader: (2)

Yells Terra had one bad batch on the old style rockers. Their new style hasn't had any issues, is stronger, and is lighter over the valve (close to OE weight but not less)

I'm going to be running the YT because my valve guides will be bronze and my cam is .629" lift. I have heard that anything over .550 lift (so pretty much every cam out there) the geometry will never be 'perfect' with the OE rockers. Not saying this will cause you issues. Ymmv.


OP if you bought them for HP sell them and spend your money elsewhere. A 102 TB would get you more than the rockers.