Re: Big bore

Posted by PackardV8 On 2013/5/13 8:53:30

I don't claim to be a "profesional" nor "expert" engine builder (note use of quotation marks). But over my 40 years of amatuer engine building I will proclaim that in 95% of ANY engine rebuilding procedures of ANY engine made by ANY mfg'er at ANY time it is wise to avoid machining processes that are either unnecessary or done simply for "insurance".

Sometimes machining is necessary for conspicuous wear or damage of course.

For mild street performance engines usually cam, carb and exhust changes are the best options.

For those trying to build engines to win 24 hours of LeMans is a different story. SO different in fact that they probably have an infinite supply of parts.

SIGNIFICANT Compression ratio is best achieved by increasing the stroke, this is especialy true on flat head engines. But stroking is a rather costly machining process. Cylinder boring for oversize pistons (when needed) is more of a machinig process to restore an engine. Compression and HP increase is not significant with boring.

Building an engine to resemble a factory racing team car????
Go ahead. I'm glad for anyone that has factory resources for parts and machining at their beconded command.