splain to me lucy.... why i should not have the tops of my pistons and combustion chambers of the head hard anodized in black????

'cause it would look silly.

temperature resistance my friend, temperature resistance.... not to mention hard anodizing is about as hard as diamonds.... mmmm goodness diamonds workin in thine motor....

I think you answered your own question

i wonder how much validity there might be in it ?? defenitely an interesting idea.

Hard anodizing doesn't stand up to impact at all, unfortunately.

Swaintech has some nice coatings you may want to consider.

Steve

even cheaper is calico out of georgia(i think,but down in that area),i use coated bearing,spring and pistons in 1200hp blower motors for offshore boats.i was using coated pistons in 86 on turbo chevy 2.8liter v6's.works well,holds up too

how much do you think it would run for a set of 8 pistons? if it's reasonable, i may consider hahving my milled v8 pistons coated for a little added protection.


were those turbo chevy pistons cast or forged?

i get it done alot by them so we get a good price.as for the pistons,cut down forged pieces.

I'm not a big fan of these coatings, the few times I've used them in motors I've built its either melted or flaked off (including Swaintech). The best thing you can do is build a motor with strong, forged parts, use the right materials and tune it right, you won't need coatings. In theory, its a great concept, but holding up to the torture a turbo comb. chamber serves up is another story.

For example, my uncoated JE pistons have held up wonderfully to 240hp/liter and counting...

sure they do,,205hp/liter normally apirated(coated)kawi 1000 motor,15.5k redline.then i turboed it to 310hp/liter all those nice big hp/liter numbers are impressive,been there done that.but i also run and build offshore powerboat motors,torque and lots of it are king.i run the 1000 island poker run,its 150mi long,my engines spin at 5000-5300rpm for a 125mi,the last 25mi i let it hang out,6200-7000rpm.thats 104mph on water.nothing can help you from severe detonation but my engines also look great on tear down and if the coatings give a total of 5% more hp and help lower oil temps,i'll take it.some have luck with stuff,some don't.

I've heard good things about cryo hardening, and it's not that spendy. Some claim you can get forged like durability with cryo'd cast parts.

Here's one site I remember, but there are many out there.

http://www.onecryo.com/onecryo/motorsport-prijune98.htm

really have to check with machine shops that do it.there are alot of scumbags that thinl dunking parts in nitrogen is all it takes.just be careful who you use,get references,

Yep, I wouldn't go through a machine shop - go to someone who does that exclusively. To get the optimal crystalline restructure the temp needs to be lowered slowly and then 'cooked' for several hours at the lowest temp. Same goes for bringing the parts back to the land of living, needs to be done slowly.

Hard anodizing is bad for fatigue life. That's why.

That's why air planes fall out of the sky if they aren't inspected properly...stress overtime is a bitch.

maybe they should just buy new MC engines and slap those in. they seem to have a good service life , or if they don't that much power, get a trusty ol' JT

This one has a good reputation:

http://www.diversifiedcryogenics.com/motorsports.htm

No affiliation, etc.

Aha! That's the first one I looked at many moons ago. Even talked to the dude on the phone a bit - I was thinking about cryoing my turbo before putting it back in the Avant. You know they have to be good when they list 5-cylinder engines in their price list.

Why would you want a hard surface on the piston crown and chamber head? Plan on eating a few valves? I would understand anodizing the piston skirts would be beneficial but no manufacturer I've heard of has done that.

I don't think anodize changes the heating properties to make it worth your while.

Also aluminium suitable for pistons doesn't anodize well.

Ducati motorcycles use anodizing on some of the air cooled piston ring-lands. there reason is scratch resistance? Go figure!