stlbluesbrother

Hey guys,

I've heard the lock nuts for Comp Cam Magnum rocker arms are subpar. So, I intend to replace them with poly locks.

Shoot some suggestions for brand, size, expected cost of new poly locks for this application:

• 455 block
• E heads
• Comp Cam Magnum rocker arms (roller tip)
  • 3/8" stud mount
  • steel
• pushrod guideplates
• pushrods (to be determined) - will be hardened

Thanks

ah64pilot

My dad has the Comp magnums in his Vista Cruiser and has run them as is for 5 years or so. I don't think there's a problem with them...at least if there is I haven't heard about it. I just installed a set in my convertible 455, I hope they are ok...people I have ask about them say they work great, and they fit under stock VC's.

coppercutlass

I bought the roller tip rocker kit from prw and the poly locks came with the kit . My friends sbc he runs that magnum kit for his set up and they would get loose eventually. I don't know if it's from constant abuse but it happened a few times then he went to the poly locks no issues since.

oddball

I don't think there's much discussion about /which/ polys to use. Just pick a set. Some are slightly different heights, which can be a big deal when using stock valve covers and full roller rockers. For the roller-tip comps, any of the available ones will work just fine.

stlbluesbrother

Thanks for the info, guys. I decided to stick with Comp Cams magnum stuff and bought 4602-16 poly locks off Amazon for $40 shipped.

stlbluesbrother

Update: Well, the new valve covers (with baffles), from Inline Tube, do not clear the poly locks I bought - Comp Cams Magnum 4602.

The roller tip rockers are mounted on 3/8" studs and the hardened pushrods ending up being 9.650" long. The poly lock is 1.300" tall.

Anyone running a similar setup that has a shorter poly lock? By the way, I do not want to use a spacer.

cutlassefi

Look in the Comp catalog, I believe they list one that's roughly an inch long.

64Rocket

You can buy spacers or I have bought the extra thick valve cover gaskets.
I have heard some have double up on the gaskets.
Or search for taller valve covers.

Gene

stlbluesbrother

Yes, you're right. The change from 1.30" to 1.00" = 4.8/16" difference, which will be extremely close to the clearance I need (measured). I ordered a set online and will receive them soon. If they don't work then I'm going back to the lock nuts that came with the rocker arms.

64Rocket

get the "Rocket" or "Fel-pro" thick valve cover gaskets. They are about 1/4" thick.

Gene

stlbluesbrother

I have the Fel-Pro VS13403T rigid gasket which is 1/4" thick. I counting on it to help with the spacing