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« on: April 27, 2015, 06:22:37 PM »
I need to order pistons for my .060 over 390. I think I have figured out how to do the measurements (but I could be wrong) and get numbers, but don't know what to do with numbers, what works best together and what not. So I need some help to put this together the 1st time and be done with it. Going in my 3900 lb. 63 1/2 with close ratio 4 speed and 3:50 gears and 29 inch tires. Maybe some has a different piston in mind.
I am ok with 91 Octane, which is what we have here in Kansas. Weekend driver, and about a 400 mile round trip to my daughters every other month. Has 406 shorty headers and ford tri power.
Heads are 63 c3 heads with 69 cc chambers, block bored .060, std 6.488 rods. Cam research 291 cam, 540/565 lift, 226/234 duration @ .050 with 109 lobe separation. Using 2 different Felpro head gaskets 8554pt measures .051 compressed with 4.232 bore. Felpro 1020 measures .041 compressed with 4.400 bore. Using 10.170 as a deck guideline.
Pistons I have found are:
H304P dish cast piston with 12cc volume and 1.759 compression height. .033 deck height. 9:22 to 1 with 8554 gasket and 9:35 to 1 with 1020.
Quench then looks to be .084 with the 8554 and .074 with the 1020.
H395P flattop cast piston with 4cc volume and 1.759 compression height. .033 deck height. 9:94 to 1 with 8554 and 10:09 with 1020 gasket.
Quench is also .084 with 8554 and .074 with 1020.
L2291F60 flattop forged with 10 cc volume and 1.776 compression height. .016 deck height. 9:72 with 8554 and 9:87 to 1 with 1020 gasket
Quench is .067 with 8554 and .057 with 1020 gasket.
Thanks for any help.
Carl