Powdercoating barrels ??

el_simo

el_simo

Zi goggles, Zey do Nothing !!
Sup guys, so the guy reboring my barrels told me that powdering my cylinder heads would lead to trouble with cooling as the ds7 is air-cooled . I may be a noob but this sounds a bit of an exaggeration . Anyone any views on this before I bring the heads and barrels to the powdercoater ? Cheers, Si
 
Don't do it. Powder coat is to thick and has a very smooth finish, it will seal off the fins and not allow your engine to cool properly. just use a standard rattle can paint, there are some really durable paints out there that work fine.


JR
 
He's right. Raw bead or sandblasted alum is best for heat dissipation. Clear high temp rattle can is about as much as I'd do. Even polishing causes alum to retain heat.
 
Ceramic coatings are great for heat applications and are generally just a little more expensive than powder.

VHT is an easy do it yourself coating, but does require you being able to bake the part at 200, 400, and 600 degrees Fahrenheit.
 
I have seen the ceramic powders just never have tried them. I use the Hi temp header powders already with good results.
 
Thanks for the fast reply lads jeez I thought he was pulling my leg ! Cool I'll look for a good rattle can paint that'll match the frame powder . Thanks lads !!
 
hahahaha maybe i can shed some light on this a owner of a shop that does powder coating... we have coated over 30 motors top to bottom jugs and all... mine are coated on my harley and it is a built motor, air cooled. coat them you are fine! i would recomend you coat prior to haveing them honed, but either way is fine... it does not keep any more heat in that paint would it is all a myth... if you can prove me wrong guys do it! we have done our own testing in the shop and work hand in hand with a speed shop/dyno tuner... never ever had issues... ever...
unless you are running insane power in a motor, and we are talking like full blown drag bikes... coat away! powder is not an insulator

lrg-424-sd_wet_black_jugs.JPG


lrg-425-sd_wet_black_jugs_2.JPG


lrg-719-1z1co4y.jpg


37600_424023228072_594008072_4640163_1939509_n.jpg




hell i even coated my oil coolers and saw no increase in temp at all!
lrg-651-oil_cooler.JPG


we even coat radiators with no issues
lrg-786-radiator.jpg
 
I agree with JRK. The idea that powdercoat retains heat is just so much bullshit. No more heat retention than paint. Polishing makes a slight difference in heat dissipation because a polished surface has slightly less surface area than a rough surface. Still, die cast aluminum is already a LOT smoother than sand cast aluminum.

'Sunny how something with no factual basis can get repeated so many times that it takes on the apearance of truth. <G>
 
i just can not see how he could mask the mating surfaces if he did that the plating would space the head
 
What if he shuved'em up his ass side ways..? what if? "heads" or "cylinders/jugs"

????????????

Being a little more direct and clearer helps answer the question
 
I wasn't seconding that powder coating should not be used. Just offering another option for DIY really. The whole engine on one of my T250s is powder coated flat black.
 
Right so, barrels in the ass is a non-runner !! That's a sweet job on those pics Joe really ! Man I wish I knew of a guy in this part of the world that could get a finish that good . I handed back parts twice to one guy cause of bubbles in the finish . Thanks again for the down to earth advice
 
Agreed. I wish there was a way to kill the myth quicker. I've always heard NOT to powdercoat things because of heat blah blah blah...but then you see really built motors with powder all over them...not just bikes, but cars and all sorts of things. JRK, other than pure experience, do you know of anyone who has done "research" as in heres an engine without PC, temp = ? and here's with PC temp still = ? or "slightly" higher or slightly lower for all we know! Just wondering. Thanks for the good answer on PC
 
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