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Topic Review (Newest First)
10-20-2003 03:24 PM
302 Z28 Willys is right on, the heat loss through a block is practically nothing. I doubt you could actually tell much differance between a bare cast iron block and a painted one. If someone is claiming a heat related problem and blaming it on whatever they coated the block with, they better look elsewhere.

Vince
10-20-2003 12:07 PM
willys36@aol.com I powder coat all of my engines, frames, springs (better than Teflon lining!), exhaust except the header which is a little too hot - those I ceramic coat. Wears like iron, sheds dirt like the plague, and needs little or no maintenance. Never had the slightest problem with overheating. If you do a heat balance of an IC engine, you will come up with numbers like 24% of the energy goes to useable power, 30% goes out the radiator as heat loss, 45% goes to heat loss in the exhaust (apprximate - don't quote me on thoses but they are of the correct magnitude). The rest goes to incidental losses such and convection and radiant losses from the block and heads and is insignificant.
10-17-2003 10:11 PM
HemmiGremmie Me to. HG
10-17-2003 09:21 PM
78SilverShark Can you please post a picture of this powdercoated engine? I've seen many other coated parts, but I would really like to see how the engine came out. Thanks!

78SilverShark
10-17-2003 02:33 PM
scott011422 We told the customers that we were painters not engineers. They asked for us to paint their blocks with so and so paint. And thats what we did. Its up to the customer to figure out the physics. Lets see, wrap a hot object in an insualating material and the object gets hotter...... NO SH1T!!!! Besides, We're half paint shop and Machine shop. All they had to do was ask one of us engineers and I'm sure one of us knew for a fact that the paint was an insulator. If not, a few of us know that it just plan makes things warmer. OOhhh Wellll......
10-17-2003 01:25 PM
classic_chevy_guy what exactly does that mean???
10-17-2003 01:22 PM
crazy larry
Quote:
Originally posted by scott011422
I would think if you get a good radiator and a pump that doesn't pump so much volume that it creates cavitation that the heat buildup couldn't be too bad.
i agree. what did y'all end up telling the customers?
10-17-2003 01:16 PM
classic_chevy_guy yeah i was thinkin about goin with the por-15, but one of my friends dad said that since its a hardcoat then it would chip a lot easier. he told me to go with ceramic, but i really havent ever heard anything bad about their coatings, besides i like some of their colors to
10-17-2003 12:40 PM
scott011422 I'm sorry, but I really don't know. Ceramic is basicly a thermalcoating. I've only seen it on overly hot items. I would say use the powder on the chassis but I really don't know the strength difference. Personaly I'd use POR-15. I can get all the free powdercoating I want and I still went with the POR-15. Its stronger and wears a hell of a lot better. Powdercoating is a little brittle so in abusive apps it tends to chip. I.E. under a vehicle.
10-17-2003 11:47 AM
classic_chevy_guy where all can you take it to get it powdercoated???

where all can you take it to get it powdercoated???

sorry my computers messed up, the second statement was supposed to say:

which ones more durable, like for chassis's and stuff???
10-17-2003 11:40 AM
scott011422 Well the ceramic is more expensive, but its main purpose is to enclose heat, that and it can take a lot of heat too.
10-17-2003 11:38 AM
classic_chevy_guy well id like to know how much more the powder coating is than the ceramic??? i dont have one yet, but id like to go ahead and find out now while i can.
10-17-2003 11:30 AM
scott011422 Hey all, I just got off the phone with our Du Point rep. Powder Paint is an insulator. Therefore will help keep the heat in the parent material. But, the rep was also telling me that some engine manufactures DO powder paint from factory. Harley Davidson is one of them. So, powder paint will cause your engines to run a little warmer, but this is apparently not a large factor. Sounds like the people that are overheating have other probs and blamed it on the coating because of basically an "urban legend". So will you see a 10-30 degree increase? Maby..... Depends on the engine. But overheat, No. Unless you don't know the difference between powder paint and ceramic coating.
10-17-2003 11:16 AM
BanditT/A i agree with 302/z28. i had my 400 pontiac block powdercoated 2 years ago actually runs cool! doesnt run cool due to the paint obviously but has never over headed even in 95 degree weather. and i dont drive like a grandma either. so your buddy is FOS!
10-17-2003 10:47 AM
302 Z28 You will not have any overheating problems with a powder coated block. All powder coating is is a different way of applying paint. The paint is a powder that is applied and the the item is heated so the powder flows out, just like paint. I agree with the above post, your buddy is FOS.

Vincr
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