Thread: Pistons

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Originally posted by MECHANIX_84
I want to run between 10:1-10.5:1 Compression Pistions in my 390. Any body know of any, Please let me know. Thanx,
Don

If this is a daily driver street motor, that's too much compression with iron heads. Here's my suggestion for a strong street motor that will run on pump gas and should allow enough ignition timing for good response.

Bore it 0.030" and use Keith Black hypereutectic pistons part # KB150-030. If it's already cut 0.030, use 0.040 or 0.060. (9.35:1 compression ratio with 0.030 pistons, 9.46:1 with 0.060 pistons)

Cut the block for zero deck, use Fel-Pro 1020 head gaskets, 0.041" compressed.

Edelbrock Performer #2105 intake

Barry Grant 750 Mighty Demon (annular discharge) Jeg's part # 132-5423020GC. Anyone who hasn't read the Car Craft August 2005 article on annular discharge carbs needs to read up.

Crane hydraulic cam H-272-2. This cam will give the exhaust some help and God knows the Ford needs exhaust help!!
http://www.cranecams.com/?show=brows...tType=camshaft
Use these adjustable rockers and pushrods:
http://www.cranecams.com/?show=brows...umber=34772-16
http://www.cranecams.com/?show=brows...umber=34645-16

1 3/4" headers, 2 1/2" exhaust pipes

If automatic, use a slightly looser converter (2,000-2,200)

It's your motor, build it like you want to, I just like to play with combinations......