Madness Started
#72
Are you talking about out-of-round? If that's the case there is really no fix but to bore it out. Did he tell you how much he's boring out the cylinders .010, .020, .030? if you're going aftermarket pistons, some of the selections are only in .030. Not sure if anybody customizes sizes or not.
#73
#75
No, a 408 a 4" stroke with stock sized pistons. The current stroke length is like 3.58 inches. the bottom od hte block typically has to be clearanced to allow the rods their full range of travel with the extra stroke length.
The common term "stroking it .030 over" implies that if you are increasing the crank stroke to 4 inches to "stroke the the engine" to increase the cubic inches to 408, you are going to need new forged pistons to handle the power and the block will be usually be reconditioned and bored out .030 inches. Most good stroker kits are matched and balanced cranks and rods, with pistons that are .030 oversized. .030" is a generally accepted bore to get out all but the worst disasters a cylinder typically sees.
As a little bonus, boring .030 over usually nets 5 cubic inches, so you could technically claim you're driving a 365.
The common term "stroking it .030 over" implies that if you are increasing the crank stroke to 4 inches to "stroke the the engine" to increase the cubic inches to 408, you are going to need new forged pistons to handle the power and the block will be usually be reconditioned and bored out .030 inches. Most good stroker kits are matched and balanced cranks and rods, with pistons that are .030 oversized. .030" is a generally accepted bore to get out all but the worst disasters a cylinder typically sees.
As a little bonus, boring .030 over usually nets 5 cubic inches, so you could technically claim you're driving a 365.
Last edited by aim4squirrels; 03-09-2009 at 09:24 PM.
#76
#77
#78