Inliners International Forums General Discussion Hi Performance rocker arm interchange?

Are there any rockers that can be used on the 194-292 series engines (other than the stock ones)? What ones interchange?


The reason I'm asking is because my cam company said I need some adjustable rockers for the cam I'm getting...

I use BBC 1.70 CompCams ultra pro magnums.

Okay, Thanks Tom!

I'm running Crower 1.75 ratio stainless roller rockers. There are several other companies who make aluminum roller rockers, and you can also get long slot stamped rockers and use poly locks to set the adjustment on them. There are also roller tip stamped rocker arms that will work in a 194-292. Just takes a bit of research on various cam companies' websites and online catalogs.

I've had Crane gold aluminum rocker arms BBC, 1.72 ratio since 1985,same set.

Next set ,most likely Crower stainless BBC 1.8

MBHD

sounds good, it's amazing how you can get eight rockers cheaper than you can get six...

What am I missing here?
The stock rockers are adjustable too.

Pete

my cam company said I need some adjustable rockers

We have 2 possible choices here:
1. you were talking to Buffy, the receptionist
2. you need another cam company

I tried arguing with the guy, but he insisted that the stock ones weren't adjustable. I figure since rollers would probably be best for me anyway I'd just find something that clearly states they're adjustable. I'm talking to Engle now, I switched companies. I'm thinking stainless steel over aluminum, I don't see why you'd put brittle aluminum in something that has such high stress put on it...

I've been very happy with investment cast stainless Crowers on my engines. I don't remember the part number but they are intended for 250/292 Chevy with 3/8 rocker studs.

I do recommend upgrade to name brand shouldered screw-in studs. The BBC rockers use 7/16 studs so be sure to match up studs with rockers. And also, be sure to provide thread relief when machining your rocker stud boss. I've seen this step missed and the boss split by the last incomplete thread under the hex. Chamfer, counterbore, or hard washer all can be used for thread clearance.

If the RPM or spring load is high enough, a roller tip is going to help somewhat, but don't expect any power from it.
IMHO a rollerized fulcrum is not only not cost-effective, it's another bit of failure waiting to happen (very dirt sensitive).
You're also going to be choosing between going all the way to a shaft conversion (SS) or a stud girdle if high-speed stability is factor - the stud system becomes a bit expensive when you don't use any of the original parts.

There are no non-adjustable stud mounted rockers, so that's a long list.
Brittle aluminum? Really? I wonder if Jesel, T&D is aware of that?
I agree that for long mileage stainless is a better product, and the investment-cast is an excellent value.The casting method produces a high quality product without all the machining expense. It weighs a few more grams, but the price makes up for it, and they'll last forever (the tips might need a rebuild eventually).