Gas holes tops of pistons
 

Windsor 302
Nephew already bought pistons for his wana be lil cruiser car (1962 Comet ) KOOL !
He has most the stuff to make it a real fun engine for .
Cam, manifold , .011 decked block, 60 CC AL heads with 202 valves and all.
SO
I was trying hard to adjust the drag of oil rings on these so called "performance pistons".
Come to find out after much frustration they are just hyper pistons with a moly skirt.
They fit nice-
BUT he has standard go to twn Aunt Tilly grocery getter rings ! :eek:
OK, cant send pistons back. Cant allow 40 pound drag rings in there either!
Is it a BIG trick to drill tops for gas operated low drag piston rings ?
This does not look like a magic trick.
OR should i just send them out, to where, for some holes ?
Your opinion?
thanx

What hp @ what RPMs is he expecting to turn? I use standard rings ,moly faced top one in a 347 , stroked 302 Windsor, which dynoed @ 468 hp @6400 flywheel. I regularly wind it to 6800 and don,t think I left much on the table (KB icon forged pistons ,AFR heads ,Anderson N-71 cam ).
Your standard cast rings will have less friction after they break in.

The benefit largely depends on: ring land / location, ring thickness, and max RPM. The problem with running that even in limited street use is carbon build up plugging the tiny holes..............................all based on my experience.

I would consult the piston manufacturer as to what they recommend. Hopefully you'll get a knowledgeable guy on the other end of the phone.

Here's a little discussion of gas venting:

Vertical or Side/Lateral gas porting • Speed Talk

Can or would someone point me to a part number or place that will sell a med drag ring?
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The rings he has now takes a freight train to move the piston with JUST the oil rings in there.
I did not even measure it as its just TOOOOoo much
Thanx
Next -
He is hoping for 400 HP at around 5500 its not a real race car, i call it a Ricky race car.
More of a ego trip....But then i think it all is anyway.
Asphault, - thanx for the tip
and thanx johnsjmc. Goood job on HP ! looks usuable
This car is just a hamburger dan car Sat night Special