Bruce, This would be real interesting with aluminum heads as the heat loss there is quite a bit more substantial/crucial than with cast iron. We had a discussion around this a while back as keeping the heat in the combustion chamber is good and bad depending on the application. Not bad numbers when you look at the gains across the power band though. Not to mention that the torque in the uncoated engine peaked at 3500 while the coated parts continued to gain torque all the way to 4000rpm and didn't fall back to the uncoated peak until 4500. Nick Alfano Performance 4849-76 st. Kenosha, WI. 53142 262-308-1302 262-942-8271 after 6pm central and weekends Message: 9 Date: Wed, 16 Jul 2008 08:54:04 -0700 From: Tom Jennings <tomj@xxxxxxx> Subject: Re: [Amc-list] Piston coatings To: "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx> Message-ID: <487E199C.8010005@xxxxxxx> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Bruce Hevner wrote: > It's not cheap! But it does help SOME,, here's a test. > http://www.swaintech.com/store.asp?pid=10321 Thanks, that puts it in perspective. Yeah, not worth the $$$ for small motors like mine. I was just thinking of this old motor's head/heat problems, but there are more cost effective ways to get the low hanging fruit. _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list