On our high rpm racing V8's we always coat piston tops and skirts. The
reduction in cylinder wall scuffing and bore wear is definitely noticeable,
aside from the friction reduction (skirts) and anti detonation effectiveness
(piston crown). Don't waste your time with cranks unless it's on counterweights
where you are trying to increase oil throw off and less cling. Don't do the
journals or the bearings, a waste of time and can have an effect on clearances
which is not useful.
Our valve springs are coated in engines that are endurance deals. Big advantage
here to spring life. The coating holds the oil better for more effective
cooling, heat being the most destructive valve spring enemy.
On our drag race engines we only coat springs when the oil flow to valve covers
is marginal. Once again this brings more heat into the equation and heat kills
'em. On a Max I wouldn't waste my money on the springs unless you have higher
lift cams and more than stock spring pressures. You should also consider
coating cam lobes in this case.
If you are rebuilding an engine such as the V-Max I would always coat the
piston skirt and crown in either a stock 1200 right up to the big bore engines,
especially useful if raising the compression and hence cylinder pressures.
We also coat valve covers to aid in oil return and heat dissipation. Coating
transmission gears in a bike engine would be a definite bonus to friction
reduction and wear.
We always use HPC for our stuff. They do all our exhaust systems as well,
inside and out. This stuff ain't no snake oil, it's Space Shuttle spinoff and
is very effective for many applications as well as cosmetics, friction
reduction, heat dissipation and corrosion protection.
Sam Blumenstein #795
Hal Taylor wrote:
> Listers,
> Anyone here have any experience w/ ceramic coating on engine internals like
> pistons, cranks, springs, etc. I'm curious to know if it really reduces
> heat loss & friction as purported, or if it's just another "bottle of snake
> oil". How tough is ceramic coating? Forgive my ignorance, but it sounds a
> little exotic to me. Somebody please enlighten me. TIA.
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