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:confused: Has anybody on this board used piston coatings? Im not talkin about the ones that you send off to NASA or some science fiction store to have applied, Im talkin about the ones one can apply at home as a do it yourself thing, just curious because my street motor is apart right now while I give it a freshening up and I can blast the piston tops clean quite easily:whacked:
no i all ways polish the tops and the head chambers . it would not hurt but you have to get them clean clean and heat them up . honey what are you cooking in the oven??:whacked:
LOL, about the sweet scent of chevy baked goods, Got so bad once when I was messing around that my lass went out and bought me a yard sale amana! Now I can play suzie home maker in my garage!, I had read about VHT header paint on piston tops and a heat barrier but have not tried it.
boy that stuff is not that hot on headers? you can rub it off with you hands .
LOL i hear ya, jus one of those old hot rod magazine articles that I read but did not dare to try, Pat check your pm box regarding a PAT KIT tm
yes i did . keep that under your hat . i can not all ready keep up with the demand of the kits:D
I wanna piston coatings that are colorfast, g,nite all gotta play lotto!
Currently, nearly all of the OEM pistons use moly coated skirts. It is an effective method of reducing cylinder wall wear. Other coatings, like crown coatings, have little benefit. I wonder when they'll fit anti-polishing rings like the big diesel guys do?
granted that there is power to be gained with proper bore finish and clearances but the moly coating of the skirts is part of the manufacturing process I suppose. Unless they are making a DIY product but I have never heard of it. Is there a spray on Moly coating for piston skirts?
No, there is no DIY moly coat. I was referring to pistons that come with moly coated skirts like those available from Speed Pro. Crown coatings have little benefit. The skirt coatings are not for power, they are for cylinder wall wear.
yes and it fall s off in the jet wash :eek: geat stuffQuote:
Originally Posted by 76GMC1500
jeg,s use to sell all alot of coatings sometime ago to do at home i have my eye on a stove for the shop . just to do some jiffy pop coatings:HMMM: may be try some stuff out and maybe it could be a new way to make a buck?
Just think of what those pieces of hard ceramic will do to your cylinder when they start to flake off the crown.
When I want to know what is worth my money and what is not, I look to the guys that do the big diesels like Wartsila. With the amount of fuel those engines burn, a percent here or there can equal a million dollars a year or more. Also with the cost of the engine, tens of millions of dollars, a couple of grand here or there to coat a piston or something would add insignificantly to the cost. Even so, none of them coat their piston crowns (they are polished, though). They don't use skirt coatings, though, because the pistons on the really big engines have no skirts.
Is this coating on the crown or the skirt? In all reality, piston skirts do not wear significantly within the lifetime of an engine. A hard coating on the skirt would serve no benefit, it's just a gimmick.
There is another coating that is very beneficial, Nikasil. Normally, a cylinder wall and rings both last about the same amount of time. My motorcycle has Nikasil plated cylinders. The cylinder lasts through many sets of rings. Plus, it is very resistant to damage. If the engine seizes, which mine has, you just scrape the piston remains off the cylinder and everything is good as new.
A ceramic coating will significantly extend the life of a piston in case of detonation. Not a cure, but it will help, and might make the difference between a WHOOPS and an OH $HIT !
Mahle has used a "Grafal Coated " piston for a long time.
I would never mess around with any "do it youself" stuff.
If you shop around you can find a set of Mahle pistons with rings for $500.
Nitromethane in a street car???Quote:
Originally Posted by TT572ZZILLA
So do you start the engine on meth. and then switch it over to the nitro??:whacked:
A scratch on a piston crown wont hurt anything.
were is erik prep work :confused: that was my old572 block if that is what your talking about:confused: not ericks? hey do not get us mix up:LOL:Quote:
Originally Posted by TT572ZZILLA
that is ok. just bo not do it again i have the 548 blown 50 chevy coupe
Ok, so this hard coating is on the skirt. Well, back to what I said before: The piston skirt does not wear significantly in the lifetime of the engine. So, coatings used to protect the skirt serve no significant function. If you're scuffing piston skirts it's because your piston to wall clearances were too tight in the first place. Personally, I like the idea of coatings that make the skirt more slick to protect the cylinder wall, not the piston.
Gouges on the skirt won't hurt anything, either. This is especially true on the sides of the piston near the wrist pin. There is very minimal loading of that part of the piston. If you do gouge the skirt, you just need to take a file or stone and make sure there are no high spots around the gouge.
You may have a blown 548 big block Chevy, but I've got two 12,500 hp twin-turbo Enterprise R5 V16s :P
You may have a blown 548 big block Chevy, but I've got two 12,500 hp twin-turbo Enterprise R5 V16s :P[/quote] get back to me when you drive it on the street :D i had 1668 cid on the street at one time :) two 548 one 572 all my cars 66 gto 548 14.8 cr 50chevy 548 blown 66gto 572 800 hp if i could of drove all of them in my self at the same time to the Be Cool car show i would have:)
Gosh Pat!
Them boys at Amoco must luv you! looks like 1668 cubic inches, talk about making your own Gone in 60 seconds movie!!
c,mon lemme drive!!!