Can we use a 1.52:1 or 1.6:1 small block chevy roller rocker?

I remember some guy coming on this site a while ago and saying something along these lines.

The only reason I ask is there are tons of SBC roller rockers out there, and on E-bay and if we could use them, why don't some of the guys here pic a price and wait it out on e-bay for another great mod.

 

only ones that fit are the ls1 rockers. tthey're the narrow body rockers. you'll still need to get the jm nuts to fit the metric studs.

 

IIRC, the LS1 rockers 1.7 rockers... what are these jm nuts that are needed?

 

I GOT SOME ON MY 3.4 THEY ARE COMP CAM 1.6 ROCKERS. I BOUGHT THEM OFF OF THIS SITE . FROM A FELLOW V6-ER. HE NEVER DID PUT THEM ON HIS CAR . I THINK IN LAST MONTHS CHEVY HI-PERFORMANCE I READ SOMEWHERE THAT THAT IS A 10hp INCREASE ON STOCK V8'S . BUT NOT SURE ABOUT US V6'S . ALSO I DONT KNOW IF THAT WAS THE TRUTH OR JUST A LINE OF B.S.

 

Ok, man, kill the caps.

Another thing, I'm fairly certain SBC rockers will work. Anyone know for certain?

 

Yes the SBC Rockers work. The motor in my 83 has a standard SBC rocker on it when one broke off on my uncle.

I think you need taller valve covers if you opt to go with the 1.6 ratio. 1.5s fit with the regular valve covers.

 

Gold Race (Extruded Narrow Body) for Chevrolet V-6 & Center Bolt V-8 Valve Covers

Narrower body for use in Chevy V-6, 90° 2.8L/3.1L. Comes with special studs to convert upper section from metric to inch. Also fits 90° V-6 and small block V-8 center bolt valve covers. Needle bearing fulcrum and roller tip. 1.5 and 1.6 ratios.
Maximum stud size 3/8" with narrow body design. Will not fit Chevy 90° V-6, small-block V-8 self-aligning, 88-99 heads, or LS1 V-8.

http://www.cranecams.com/master/goldrace.htm

Chevrolet V-6 80-94, 173 (2.8L) and 189 (3.1L) cu.in.
NON-SELF ALIGNING, NARROW BODY ROCKER ARMS
Stock ratio with special stud diameter 99795- 1.50 3/8” 25750-12d
Increased ratio with special stud diameter 99795- 1.60 3/8” 25759-12d

d For inline valve cylinder heads. Set includes special 10mm x 1.50 bottom x 3/8" x 24 top rocker arm studs (99148-12), no machining required. Check valve covers and intake manifold for clearance throughout the lift cycle.

 

Okay,
This is the problem with this question you get 6 different answers.

So the SBC rockers will fit if you use fiero vavle covers, or stock covers with 1.52:1? But this means they have to narrow rockers?

 

due to the small space available, the rockers are narrower than conventional rockers. Not sure if it applies to reg chevy rockers, but the full roller rockers need to be the narrow body style. as far as I know, crane is the only company to make them.

 

The only difference for rockers is that a SBC rocker is designed for a 3/8" stud, and might be a bit wider in the middle. Our motors' rockers take a 10mm stud. And as you know, those two sizes are pretty much the same. I bet you could fit SBC rockers on the head, and then grind them down a bit where interference occurs. 614streets is the name of the guy you're looking for, here's the message:
https://www.thirdgen.org/techbb2/sho...threadid=62795