Im not an expert by any means, but Im pretty sure that what they mean by porting and polishing the cylinder head is enlarging and smoothing out the ports so that everything flows better. Often this is done in conjunction with changing the pistons, maybe thats what you heard?

 

Here's a good example of it with some pictures to give you a better idea of what a port and polish vavle job involves....


http://www.honda-performance.com/services-porting.asp

 

o thanks. yea pilot u mite be right on that one

 

you balance pistons and rods

you knife edge your crank

you port and polish your intake and exhaust manifolds and and the valves and heads

 

Great link there Mr. Nasty..went in there and got some learnin in that site: Thanks

WheelBrokerAng [sm=americanasmiley.gif]

 

Okay, what does "balancing and blueprinting" an engine mean?

 

Everything on the engine has some tolerances. Say the pistons have to weigh the same within 5 grams - you make them within 1 or 2. Make the diameter & straightness of the cylinder bore BETTER than Honda's allowable tolerance. And you do similar things to whatever other engine parts you can think of.

 

Ah ha! The master comes through with the answer. Thank you, JimBlake, for edumacating me.