Anyone use the PolyDyn coatings on pistons?
Originally Posted by CANNIBAL
If so, how did you like it? Was their better oil control, i.e. less burning/blowby?
I can help you here since I have used Polydyne coatings for years. I use both their dome coating as well as their skirt coating. Both allow slightly less piston to wall clearance but the major benefits are reduced friction and reduced heat loss through the piston. Both contribute to more horsepower at the flywheel.
Steve Demirjian
Race Engine Development
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From: Orange Park, FL
My pistons were coated from Diamond so I'm not sure who they use. My heads however were coated by PolyDyn. Give them a call as they are more than helpful in answering any questions you may have. I sent in my GTP S2's and had the combustion chambers, valve faces, and exhaust ports ceramic coated and the intake ports flow coated all for only $300. Turn around time was about 1 week. I was quite pleased with their work and professionalism.
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From: Lexington, Ky
Originally Posted by Steve - Race Eng
Cannibal,
I can help you here since I have used Polydyne coatings for years. I use both their dome coating as well as their skirt coating. Both allow slightly less piston to wall clearance but the major benefits are reduced friction and reduced heat loss through the piston. Both contribute to more horsepower at the flywheel.
Steve Demirjian
Race Engine Development
I can help you here since I have used Polydyne coatings for years. I use both their dome coating as well as their skirt coating. Both allow slightly less piston to wall clearance but the major benefits are reduced friction and reduced heat loss through the piston. Both contribute to more horsepower at the flywheel.
Steve Demirjian
Race Engine Development
Thanks, Steve. Do you see any advantage of having the combustion chambers, valves, etc that the latter poster posted? Doesn't sound like a bad idea.
Originally Posted by CANNIBAL
Thanks, Steve. Do you see any advantage of having the combustion chambers, valves, etc that the latter poster posted? Doesn't sound like a bad idea.
I can shift faster than you.
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From: Baton Rouge, LA
I am using the PolyDyn coatings in a 346ci forged nitrous motor that I am building for a customer/friend. The tops and skirts of the pistons will be coated, along with the combustion chambers, exhaust port, and valve faces. I attached some pics below.
These were all coated through GTP, who is a dealer for PolyDyn.
These were all coated through GTP, who is a dealer for PolyDyn.
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I can shift faster than you.
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From: Baton Rouge, LA
Levi, give Craig@GTP a call. He charges around $300 for combustion chamber, intake/exhaust runner, and valve facings coatings and I believe $200 for the piston tops and skirts. Call him and double check those prices.
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From: Aurora IL
Yes give Craig a call... He had my whole LT4 coated. it is reasonable in cost as well as added protection if you lean it out. i use it for all my N20 or boosted engines.. i have seen the benefits with Bob Norwood ( who coats EVERY engine he builds NA or not) "tuning" 1000 RWHP TT ferrari's on my old dyno that were seeing 1600 degree exhaust temps... the Bonneville GTO with a 468 TT BB Chevy running 40 lbs of boost at 7800 RPM with 1760 exhaust temps!!!!!! (1424 RWHP on my dyno jet) and the motor not only lived but ran Bonneville at 268MPH the following month. 
to date that car has made a best of 1560 rwhp 
on my old dyno. Yes we had a software patch to allow the dyno to display the numbers over 1200. they were not wanting to do it because of the potential of over spinning the drums but we told them the dyno is seeing it why not let us see the results as well we were not spinning it over 190MPH... which was their main concern. at that time they did not recommend anything higher than 200mph.. and this was done in 1998.. Of which i have the video still but have not converted it to view online it is such a big file. I have TT F50, TT Testarrossa, TT 911, F40, as well as other cool high HP stuff from the days of Area 51 Performance.
to date that car has made a best of 1560 rwhp on my old dyno. Yes we had a software patch to allow the dyno to display the numbers over 1200. they were not wanting to do it because of the potential of over spinning the drums but we told them the dyno is seeing it why not let us see the results as well we were not spinning it over 190MPH... which was their main concern. at that time they did not recommend anything higher than 200mph.. and this was done in 1998.. Of which i have the video still but have not converted it to view online it is such a big file. I have TT F50, TT Testarrossa, TT 911, F40, as well as other cool high HP stuff from the days of Area 51 Performance. 
Originally Posted by Chris99WS6PWTMET
My pistons were coated from Diamond so I'm not sure who they use.
so its possible to order pistons already coated? GOD BLESS 
Where did you get yours from (direct from Diamond or from someone else)?
Originally Posted by Chris99WS6PWTMET
My heads however were coated by PolyDyn. Give them a call as they are more than helpful in answering any questions you may have. I sent in my GTP S2's and had the combustion chambers, valve faces, and exhaust ports ceramic coated and the intake ports flow coated all for only $300. Turn around time was about 1 week. I was quite pleased with their work and professionalism.
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From: Orange Park, FL
I ordered the Diamond's from my #1 mail order shop - Thunder Racing. Yes Chris G. will drop ship coated pistons.
You can find polydyn contact info at www.polydyn.com
Ragtop - I have noticed cooler engine temps since the coatings (I dont monitor oil temps).
You can find polydyn contact info at www.polydyn.com
Ragtop - I have noticed cooler engine temps since the coatings (I dont monitor oil temps).
Something I'm curious about...
I regularly toss around the idea of switching to a big bore, so I may need to unshroud the valves in my heads one day down the road. Since this is a possibility, I don't really want to coat my combustion chambers just yet.
If you have the pistons coated, but not the combustion chambers, does it subject the combustion chambers to more heat? And if so, would the additional heat be more likely to cause any damage?
I regularly toss around the idea of switching to a big bore, so I may need to unshroud the valves in my heads one day down the road. Since this is a possibility, I don't really want to coat my combustion chambers just yet.
If you have the pistons coated, but not the combustion chambers, does it subject the combustion chambers to more heat? And if so, would the additional heat be more likely to cause any damage?
When we first started using ceramic heat barrier coating
in the early 80's we captured so much heat in the chamber that we would roast the rings.Things have improved with better materials lately.This was on high output 2 strokes,that don't get a rest period like 4 strokes.
in the early 80's we captured so much heat in the chamber that we would roast the rings.Things have improved with better materials lately.This was on high output 2 strokes,that don't get a rest period like 4 strokes.
what are all the "gains" that a person gets out of each:
- piston top coated
- piston skirts coated
- chamber coated
- valve face coated
- exhaust port coated
- intake port coated
I'm on a limited budget so I'm trying to do what gets the most gain per $.
to give you an idea of what I'm "trying" to do. I "think" I can scrape together the money to do a:
re-sleeve LS1 block (use my 01 block and put in Dartons) @ 4.125" bore
forged pistons (4.125")
stock rods w/ARP bolts and floating pins
stock crank
I will reuse my stage 3 heads (2.08/1.60 valves), head studs, and put in main studs. With this, I plan to spin no higher than 6800 (7000 MAX) and am shooting for a very streetable (stock idle) 450-460 rwhp.
With this all in mind, what should I really coat (if any of it)?
- piston top coated
- piston skirts coated
- chamber coated
- valve face coated
- exhaust port coated
- intake port coated
I'm on a limited budget so I'm trying to do what gets the most gain per $.
to give you an idea of what I'm "trying" to do. I "think" I can scrape together the money to do a:
re-sleeve LS1 block (use my 01 block and put in Dartons) @ 4.125" bore
forged pistons (4.125")
stock rods w/ARP bolts and floating pins
stock crank
I will reuse my stage 3 heads (2.08/1.60 valves), head studs, and put in main studs. With this, I plan to spin no higher than 6800 (7000 MAX) and am shooting for a very streetable (stock idle) 450-460 rwhp.
With this all in mind, what should I really coat (if any of it)?
Last edited by 2001CamaroGuy; Dec 11, 2003 at 04:52 PM.