Coated Parts

[bsbn]

In the Nov. car craft mag. they claim that painting the piston tops with VHT flame proof coating P/N sp101 and baking them at 400 deg. for 8 hours was worth 40 H.P. on a 800 H.P. 406 gm motor. Is this for real? I"ve read about coated parts before and they claimed similar results. If this really does work does it wear off or carbon over after awhile and loose efectivness? Does anybody know about this type of thing?

[sctur601]

The stuff works I had a chebby engine I used the stuff in. I did the piston tops, valves, combustion chamber, and the exhaust port. The engine made 26hp more but was able to run 92 pump gas on 11-1 engine with a iron heads! before I had to run 100 race fuel. also I changed headers on the engine and noticed that the ports where still shiny wasnt any carbon to be seen and I had put 22000 miles on it. But they are expensive to use. Sctur601

[sanborn]

The principle of coating the pistons, chambers,etc, is to keep combustion heat inside the chamber and not let it be dispated to the water, pistons,etc. And it appears to work in certain applications. You saw a lot of coated pistons and chambers in Nascar a few years ago, don't see much of it now except in supertrucks because they run so much chamber heat.

You do see a lot of coated cranks, rods, windage trays in order to improve oil control. And coated rod and main bearings especially in qualifying engines.

I hav not seen the VHT product. We send our parts to H.M. Elliot in Denver N.C. for coating. Prices are reasonable for what you get.