teflon coating pistons?
Thread Starter
On The Tree
Joined: Sep 2004
Posts: 117
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teflon coating pistons? My buddy who owns a supra is rebuilding is engine, and he was asking me where he can get his pistons teflon coated... i had no clue, and I didnt even know what the hell that would do... he told me teflon coating further prevents knock and detonation...
anyone have their pistons teflon coated here? should I get my pistons teflon coated before I put it together? I also assume this would make my pistons like 4.034 or so which would make it fit harder? (well im gunna have my machine blocked according to piston fit but still)
anyone have their pistons teflon coated here? should I get my pistons teflon coated before I put it together? I also assume this would make my pistons like 4.034 or so which would make it fit harder? (well im gunna have my machine blocked according to piston fit but still)
TECH Fanatic
Joined: Jul 2002
Posts: 1,218
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From: MI
I believe teflon coating just reduces heat by creating less friction on the sides and skirts of the pistons. I dont see a lot of people doing it. It hasn't really been proved whether or not it is worthwhile or not. I guess if you are paranoid about the engine, it might provide you with piece of mind, but other than that, I think you are wasting your money.
Originally Posted by seal
My buddy who owns a supra is rebuilding is engine, and he was asking me where he can get his pistons teflon coated... i had no clue, and I didnt even know what the hell that would do... he told me teflon coating further prevents knock and detonation...
anyone have their pistons teflon coated here? should I get my pistons teflon coated before I put it together? I also assume this would make my pistons like 4.034 or so which would make it fit harder? (well im gunna have my machine blocked according to piston fit but still)
anyone have their pistons teflon coated here? should I get my pistons teflon coated before I put it together? I also assume this would make my pistons like 4.034 or so which would make it fit harder? (well im gunna have my machine blocked according to piston fit but still)
I have had both done. Diamond Pistons did mine.
You can go to www.perigee.net/~lunapark, and look at the C5-R pictures to see the piston coated on the sides and top
Sorry I thought he was referring to ceramic coating, I read the title too fast...
I have spoken with reputable engine builders and they have all told me ceramic coating has really not been proven to help. As for the teflon, I am not sure about that...
I have spoken with reputable engine builders and they have all told me ceramic coating has really not been proven to help. As for the teflon, I am not sure about that...
9 Second Club
Joined: Feb 2002
Posts: 985
Likes: 7
From: Lake Orion, MI
Originally Posted by 2001WS6Vert
I have teflon coated pistons. I just took the block apart to refresh some things and the coating is gone, just like it was never there. Less than 5000 miles.
Rick
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I have heard that the coating actually permiates (sp?) the metal and that even though it looks wore off, it's still doing it's job. Whatever that is. My dad is into drag boats and he does this with all of his rebuilds. This is the explaination he gave me when he was telling me about it a few years ago. Not sure if its true though, or if he's just crazy. Probably the latter. 
BTW, I can't remember exactly which coating he was talking about. I'd assume it was the teflon, but can't remember for sure.
BTW, I can't remember exactly which coating he was talking about. I'd assume it was the teflon, but can't remember for sure. 
Thread Starter
On The Tree
Joined: Sep 2004
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interesting read on that hotrod article... looks like i'll be teflon coating mine.... just extra degree of safety i guess
(depending on the price, if it costs like 500 bux to coat 8 pistons then no lol)
found my own answer also
and the coatings normally go on with a thickness of .002 to .004 inch, so very little compensation needs to be done during the machining process
(depending on the price, if it costs like 500 bux to coat 8 pistons then no lol)
found my own answer also
and the coatings normally go on with a thickness of .002 to .004 inch, so very little compensation needs to be done during the machining process
Last edited by seal; Nov 1, 2004 at 10:07 AM.
Polydyne coatings does both friction reducing coating and ceramic coatings. Mahle pisons come with an antifriction coating. They have been proven to help reduce wear on the cylinder walls! You will have to look there contact info up though they are located here in the Houston area I think off of 290.
11 & 7 Second Clubs
Joined: Oct 2004
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From: Motorhome, Freeways, Truckstops, Pits
Originally Posted by seal
My buddy who owns a supra is rebuilding is engine, and he was asking me where he can get his pistons teflon coated... i had no clue, and I didnt even know what the hell that would do... he told me teflon coating further prevents knock and detonation...
anyone have their pistons teflon coated here? should I get my pistons teflon coated before I put it together? I also assume this would make my pistons like 4.034 or so which would make it fit harder? (well im gunna have my machine blocked according to piston fit but still)
anyone have their pistons teflon coated here? should I get my pistons teflon coated before I put it together? I also assume this would make my pistons like 4.034 or so which would make it fit harder? (well im gunna have my machine blocked according to piston fit but still)
Originally Posted by seal
Kyle, what kind of coating is that? anti friction? and how much did it run ya? worth it ya think?
Kyle
Originally Posted by Bryan Wilkinson
Well instead of getting responses from those who a. don't understand it, and b. have never done it, the purpose of coating the sides is not to reduce heat, but add a second layer of friction reducer to the skirt. If in some small instanace the oil got low the teflon would offer extra protection. The Ceramic coating on the top of the piston keeps the heat from transferring to the bottom side of the piston and into the wrist pin area.
I have had both done. Diamond Pistons did mine.
You can go to www.perigee.net/~lunapark, and look at the C5-R pictures to see the piston coated on the sides and top
I have had both done. Diamond Pistons did mine.
You can go to www.perigee.net/~lunapark, and look at the C5-R pictures to see the piston coated on the sides and top
Staging Lane
Joined: Jul 2004
Posts: 50
Likes: 0
try this link about different coatings & applications:
http://www.calicocoatings.com/index.phtml?coatings
http://www.calicocoatings.com/index.phtml?coatings