more powerful head!

[1stgen]

Originally Posted by donnyavery

he's been through 17 bottles in 4 months

yup...I would be a very happy retailer of NOS myself.

A lot of people polish their CC with success. If done correctly it works. there are blemishes from the factory those blemishes cause carbon buildup which in turn turn into hotspots of their own. If you polish them the carbon build up is lessened if not halted almost completly. Unless a "customer" (I say customer in the lightest sense of the word since I usually only port for friends now adays.) specifically asks for the CC to be polished I wont touch it.. its way to easy to screw up and IM way to much of a perfectionist when it comes to heads.

Ive polished quite a few CC to a high degree with no problems. Ive done quite a few half ass ones for "this motor only needs to last 3 races" cars and they wound up working just about as well. but to err on the side of caution for the OP start with a lawn mower engine...dont start with your daily driver or anything that cost more than a pair of shoes

[M.Bailey]

I'm not really in favor in grinding or polishing on the CC unless it is for valve clearance however I have seen ceramic coating on the CC and it does help greatly in contaning heat in the cylinder resulting in a better burn (and more power) the same applies in ceramic coated pistons which do come in the SC cars I believe, I know mine has them.

[curvesrgood]

Considering the discussion here I think I'll throw in something I found in a Popular Mechanics issue a few years back that I've always mulled over. This podunk fellow in India had people from all over bringing him motors (motorcycle, lawnmowers... even small cars) to scuff the piston tops... the theory was the marks/swirls (if done properly) caused more turbulence in the chamber causing the fuel/air to mix better thereby causing a more powerful explosion (more efficient burn) in the combustion chamber. I always found this theory very interesting, but have yet to run into anyone who has claimed to have tried this (being as one COULD be ruining an otherwise good set of pistons trying it). I know many pistons are as smooth a top as possible, so his idea may be garbage or may only work because of inferior fuel quality over there, or on engines with poorly designed combustion chambers or fuel/air mixing systems, but I did find it terribly interesting. Smart fellow regardless because he seems to have found something that brings in plenty of business . I'm sure I didn't do the fellow or his work justice in my blurb here... I wish I still had the article! It has stuck with me for like 4 or 5 years now.

[mr2magic]

You prolly mean this Design To Improve Turbulence In Combustion Chambers