Fireballmatt15

I am looking at options for roller rockers on my 408 ( I have tfs-215s with bronze guides so stocks are out of the question.) I’ve seen good things about the yella terra ultralites but they seem to be hard to get in the US without paying a premium. I’ve heard bad things about the Harland sharp’s like issues with breaking, I’ve read similar issues with about every roller rocker out there. I’m also worried about the extra weight causing valve float, that’s why I am leaning towards the YT’s as I’ve read they are relatively light and don’t cause issues in with valve float. Are there any roller rockers that are reliable and won’t break after 5k miles?

bthomas

iTrader: (1)

Tsp has a set that is supposed to be pretty good.

M33P

One of the big builders on here swears by Yella Terra.

showdog75

iTrader: (8)

Yella Terra here. Spin mine to 7k regular.

Fireballmatt15

Where'd you get your YT's from? I'm having a hard time finding any supplier in the US who doesn't mark them up $200.

SlowTBSS

I use Yella Terra rockers on my 402, Tony Mamo who did my heads, cam and intake swears by them. I would contact him if you're looking to buy a set.

Fireballmatt15

I've seen the TSP steel roller rockers and have considered those but the only hangup for me is they are 1.72 rockers and I had my cam ground to use a 1.7 rocker. With a 1.72 rocker it adds .007" of lift on the intake and .005" of lift on the exhaust to my .621/.604 specs. Not sure if that would actually cause a problem though. They also use stock pedestals which won't fit in my trickflow heads so I would have to run prw pedestals or machine the OEM ones.

klinznilk

iTrader: (8)

Ive been using the TSP steel roller rockers on my PRC heads Knock on wood they are surviving on my Procharged 416. Lots of mileage and lots of abusing so far so good

grinder11

iTrader: (1)

Accounting for pushrod flex and other variables, the 1.72 rockers probably have the theoretical lift of the 1.7s, if the 1.7s had no pushrod flex and the other variables. You're literally splitting hairs. 1.72 should be just fine. Now, 1.8s may not be.....

Fireballmatt15

Do your PRC's have bronze guides, that's my worry that the geometry may be different than the YT's causing premature guide wear. Also do they fit under the stock valve covers? I do like the idea of a steel roller rocker over an aluminum rocker, in my mind that would be stronger. Have you had any issues with valve float with the heavier rocker?

Rich-L79

Comp Pro Magnums are a great steel roller rocker which has a pretty light weight on the nose. They are only available in 1.8 ratio though so you'd have to take that into account.

showdog75

iTrader: (8)

Tony Mamo

Che70velle

iTrader: (6)

I’ve got yet another YT set coming from Tony this week for a new build. He’s your go-to for YT USA.

Tony @ Mamo Motorsports

Check every Mamo build thread for the last two decades

Whether its an LS1....LS3....LS7 they all have YT rockers and its not by accident (my personal hot rods as well)

They are the lightest most cost effective aftermarket rockers on the planet IMO and I have purchased over a thousand sets since the early 2000's when they were introduced

If there was something better for less money I would be recommending that but there isn't

I normally stock just about about everything in that line....shoot me an email or pick up the phone if you want more information

Regards,
Tony

01CamaroSSTx

iTrader: (3)

Adjustable or non-adjustable? BTW valve springs are what keeps the valves in check not the rocker arms. Shaft mounted rocker arms provide more stability at high rpm and steel is stronger than aluminum. Jesel, Crower and T&D for the high end stuff. I have a set of TSP non adjustable steel rollers on my 370 build that has 823's with the factory guides and I'm pretty sure stock rocker arms work with bronze guides. Both the PRC LS7 and Brodix BR7 heads I have came with bronze guides and I was able to use LS7 rocker arms on them.

Fireballmatt15

I am looking at non-adjustable at the moment. I’m between the TSP steel roller rockers and the YT ultralights at the moment. Technically I could get away with stock rockers on these heads if the geometry was absolutely perfect but I probably won’t be able to get it that perfect and it would more than likely cause increased valve guide wear and the stock rocker pedestals won’t fit in these heads without some modification, so I’m sticking with a aftermarket roller rocker.

M33P

not to shoot myself in the foot, but there is a listing on ebay for an open box set of new yella terras for sale...ive had them on the watchlist for awhile now just havent pulled the trigger.

91 Z28

iTrader: (3)

I'm running stud mounted Lunati voodoo rollers with 11/32" pushrods on mine. Spin to 7k all the time

Bob570

IMO, I would want a steel rocker. I know of a few engine builders who don't use aluminum rockers anymore because they fatigue over time and have broken too many rockers.

Che70velle

iTrader: (6)

I agree here if it’s going to be a 100k mile daily driver type of hot rod. But for a weekend warrior build that gets beat on, the YT’s are great. 7 years on a set in my 434.