I would guess your piston tops are coated to shed heat, not retain it.
I experimented with ceramic coatings on pistons in the late 70's (on a 50cc
GP bike) Worked really well.
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of matt matthews
Sent: Tuesday, April 27, 2004 1:08 PM
To: MJSUKEY@cs.com; 6pack@autox.team.net; fot@autox.team.net;
shop-talk@autox.team.net; Triumphs@autox.team.net
Subject: Re: Engine coatings
I use Polydyne coatings in Houston.
I use two different coatings, layered, on the bearings. I was told by the
original engine builder the he could not get the 1500 Spit to live long
without them. Normal rev limit is about 7000 with touches to 7500. 8900
wiped three of the four rod bearings. Also, if the bearings were aluminum
they would only be good for one weekend. Clearances are critical.
The exhaust manifold is coated inside and out to retain heat and resist
rust.
The exhaust passages are also coated.
The piston tops and cylinder head combustion chamber is coated to retain
heat. The sides are coated to reduce friction.
The car runs cool, compared to our other car which was not coated, but will
be.
> From: MJSUKEY@cs.com
> Reply-To: MJSUKEY@cs.com
> Date: Tue, 27 Apr 2004 13:06:51 -0400
> To: 6pack@autox.team.net, fot@autox.team.net,
> shop-talk@autox.team.net, Triumphs@autox.team.net
> Subject: Engine coatings
>
> There are all kinds of coatings being offered by different plating
> companies out there to be used on internal engine surfaces, different
> ones for blocks, cams, pistons, ..... all claiming to decrease
> friction, make your parts last longer, make your car go a million miles
per hour, well you get the picture.
> On paper they look kind of interesting. Has anybody had any first hand
> experience with any of these coatings? Opinions good bad or indifferent?
>
> Thanks,
> Marty Sukey
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