Billet/two-piece valve covers, how tall to make them?

Richard/SIA

Richard/SIA

Well Known Member
Billet/two-piece valve covers, how tall to make them?

OK, so I'm fairly serious about making some two-piece billet valve covers.

I only want to make ONE design height, so what is the most bulky-tallest rocker assembly I need to clear? :dunno

Anyone have a sample of that rocker (damaged/scrap?) I can use for design mock up?

Follow up question, Finned top, Chevrolet script, or 409? (Mine will be Finned!)
Thinking of a large viton "O" ring to seal the top to the bottom half?
 
Richard/SIA

Richard/SIA

Well Known Member
Easy valve adjustment without oil dripping.

Easy valve adjustment without oil dripping.

Particularly nice for adjusting hydraulic lifters with the engine running.
 
B

Boat

Well Known Member
IMO, the finned look is cool, retro...and not billet. The "409" might be a 348, a 380, a 409, 427, 482...and if they can't figure it's a chevy, then I'm not giving them clues:roll

So I'd go with a plain top with a thickness that could be custom engraved/routed.

It sounds like a neat idea to me.
 
sdb348

sdb348

Active Member
2 piece valvecovers

I made a set about 7 months ago . I used 6065 al 3 inch thick and a 1 inch thick top plate, I made mine with a 1/2 inch thick wall. i countersunk the 6 bolts (1/4X20X3 1/2inch ahcs) and used 18 1/4X20X1 to mount the top plate. the first one didn't come out too bad.I was working on the second one and trashed out $700.worth of aluminium. 3inch tall wall gave me about 3/8 over a taller rocker arm nut. I did find that you will have to remove someof the interior wall for valve spring clearance I mounted 4 coils on my cover cpc system and the airbreather at the front top.I wish I had the knowlage to run the drillmill.I did what your thinking of doing I cut the flange off a old valvecover. I would be intersted in a pr . I no the' re not gunna be cheep
 
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