[Half-Inch Stud]

Thermal barrier coatings for combustion chambers: probably see a HP benefit with aluminum heads. Ping?

Friction reduction coatings; probably see a HP benefit in the rear gearset & transmission, maybe in the engine. Seems to mee that the high-loading surfaces are better-off with a polish and Redline lubrication.

[mgarblik]

Agree, the anti-friction coatings must do something, because almost all the OE's use them on piston skirts. They do it for mileage and emissions. Coating allows tighter piston to wall clearance which means fewer hydrocarbon emissions. Anti-friction results in less heat and more HP. The real question which nobody can put a number on, including the coating manufacturers and sellers, is how much HP gain. Is it 2 HP on a 1000 HP engine?, 8 HP? They never want to put a real number on it. Certainly isn't anywhere near 50 HP or as I said, sanctioning bodies would be all over it. We run "hard anodized" pistons in our car. That could be considered a coating, I guess. We do it to provide a greater margin of error in our tuning. The soft aluminum piston is shielded from melting a fraction of a second longer with the coating than without. Think of it as the difference between a regular fuse and a "slow blow" fuse. So in a sense it makes more HP by remaining a piston longer than a glob of melted aluminum. Coatings have their place in an engine, but there are many more cost effective places to spend $$$ first.

[Aaron Quinton]

The skirt coatings are there too reduce the effective piston to wall clearance while dealing with more bore distortion. It reduces noise without scuffing. That is it.

If you think about it, the friction in the power cylinder boils down to rings rubbing in the bore and the skirt to wall clearance shearing oil. Tightening the clearance up reduces oil film thickness increasing friction.

Originally Posted by mgarblik

Agree, the anti-friction coatings must do something, because almost all the OE's use them on piston skirts. They do it for mileage and emissions. Coating allows tighter piston to wall clearance which means fewer hydrocarbon emissions. Anti-friction results in less heat ..

[mike leech]

Originally Posted by Half-Inch Stud

Thermal barrier coatings for combustion chambers: probably see a HP benefit with aluminum heads. Ping?

Friction reduction coatings; probably see a HP benefit in the rear gearset & transmission, maybe in the engine. Seems to mee that the high-loading surfaces are better-off with a polish and Redline lubrication.

With a micro polish and a coating coating like microblue on the ring gear and bearings it's possible to run thinner dif fluid. Possible help there.

Problem is pro stock re-Coats often I'm told. By a very reliable source.

[Half-Inch Stud]

Originally Posted by mike leech

With a micro polish and a coating coating like microblue on the ring gear and bearings it's possible to run thinner dif fluid. Possible help there.

Problem is pro stock re-Coats often I'm told. By a very reliable source.

Mike, hmmmm, if your ring-pinion is still swimming in 80-90W then please look into draining it ut, wiping everything clean, solvent spritz, then reload with the Redline stuff. Definite reduced temperatures.
....and reduced parasitic HP losses.

[chiphead]

What do you guys think of Swain's coatings for piston skirts to reduce piston to wall clearance?

[PAUL K]

Originally Posted by chiphead

What do you guys think of Swain's coatings for piston skirts to reduce piston to wall clearance?

Works great for that application.

[mike leech]

Originally Posted by Half-Inch Stud

Mike, hmmmm, if your ring-pinion is still swimming in 80-90W then please look into draining it ut, wiping everything clean, solvent spritz, then reload with the Redline stuff. Definite reduced temperatures.
....and reduced parasitic HP losses.

I'm running Dewco lube. If I didn't know better I would think it was 10 W 30. Super light weight

[Half-Inch Stud]

Originally Posted by mike leech

I'm running Dewco lube. If I didn't know better I would think it was 10 W 30. Super light weight

Check the Red Line stuff; likely thinner, likely slipperier, likely never get dark colored after many runs.

[Anderson Port Development]

Originally Posted by mike leech

I'm running Dewco lube. If I didn't know better I would think it was 10 W 30. Super light weight

... c'mon Mike, you gotta step up to the 0/10 ultra thin weight stuff, and see what really low oil pressure looks like ...

[john marcella]

Originally Posted by Anderson Port Development

... c'mon Mike, you gotta step up to the 0/10 ultra thin weight stuff, and see what really low oil pressure looks like ...

He's talking about rear gear oil. Not motor oil. And 0/10 is chicken chit. 0 /2 and 0/5 is trying! But not for me.lol

[Anderson Port Development]

Originally Posted by john marcella

He's talking about rear gear oil. Not motor oil. And 0/10 is chicken chit. 0 /2 and 0/5 is trying! But not for me.lol

... I know, I saw his pretty blue stuff laying on top of the heads, at Norwalk , I was just trying to make him laugh ... Lol