Thread: Building a blown 402/427
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11-06-2011 04:08 PM #1
Building a blown 402/427
Recently a nice original BBC 396 .030 over block fell into my lap.
I'd like to build a blown engine..but don't want to bore the block out to maximum specs if I can avoid it.
I really could use some help choosing pistons and cylinder heads.
Piston choices are slim unless I build a 454..which means boring to the max and hoping the cylinder walls can take the abuse.
Most guys tell me to sell the block and build a 454..I'd like to build what I have.
Anyone good with numbers and can tell me what dome size of piston I'll need when bolting on 454 heads to a 402/427 bore?
I intend on using all forged parts in the bottom end and run this car on the street in a 1971 LeMans.
The Dyers Roots type blower will be added later.
Thanks.
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance