I'm in search of new forged pistons for my motor.

Question is, do I go with the ceramic coating for them? I can grab regular diamond forged pistons for $5xx vs the $7xx with the coating, rings included.

Does it make that much of a difference?

 

subbed for future reference lol

 

I have diamond forged pistons.
scuff and heat coated.

 

Ok....?

 

GO here

http://intense-racing.com/Merchant2/...e=LSJ_Hardcore

 

Those are only coated. That helps me nothing.

 

it makes a huge difference dan, it protects the piston from heat problems by creating a thermal barrier

 

My engine builder (just his opinion) did not think much of coatings and showed me a bunch of pistons he had taken out of cars that had the coating flake off. So I elected to not spend the extra money on it

It probably provides a good thermal barrier but doesn't help much if it all eventually flakes off.

 

true..it does eventually flake off but imagine..the coating stayed on for say 75k miles of abuse before it flaked off and u have alot of life still left in ur pistons..now imagine a piston that didnt have the coating after 75k miles..


so yea i mean im no expert at any means but it makes since to me to protect it as long as possible

 

I'm not an expert at all but wouldn't the flakes of coating floating around in the engine be bad? Isn't that why we have air filters, to keep particles out of the motor?

 

Thanks Raven, appreciate it.

I really don't have the extra cash, but if it makes a major difference I'm sure I can save up some more. Install will be nothing since i'll do it with a DSM buddy of mine.

Looking for more answers, primarily from the more knowledgeable on here as well.

 

it doesnt flake off like skin does or stuff like that..more of a burns off..every ignition burns a little more and more..

no prob man

 

If it does flake off, it probably goes right out through the exhaust or burns. I can't say though as I have no experience with this subject.

 

It was just my builder's opinion. But when I went through my engine build I found that everyone had a different opinion. Engine building seems like it is more of an art than science sometimes.

I have a friend that has a ton of engine experience that just put coated pistons into his ecotec.

I doubt the flaked coating would hurt anything. it is such a thin layer to start. It's not like a rock flying into the cylinder.

 

cryo..cryo...cryo is all ima say

 

I have a friend that put diamond pistons in his with them coated and after about 10k miles he had to change his head gasket. dont ask me why he didnt change it when he put new pistons in, I would of done alot more than that. but anywho he took out his pistons and he saw like burn makes on them where the coat was chipped off and burned the sport where the coat was.. i dont have much experience either but i just thought id tell yall. he had all cooling mods and stage 2 with a 2.8 pulley.

 

I've built several motors (not LSJ's) but I've always used Speed Pro Hyperutectic pistons. I've never had any problems with them. The pistons I use are the same ones a few of the locals that run short tracks use and you pull the pistons out after a full season and they still look almost brand new...

 

I soent some time reading some abstracts this morning
http://www.sae.org/servlets/SiteSear...pe=ALL&x=0&y=0

And there are definite experimental advantages in the literature. I guess it comes down to is it worth the money and if it is going to not chip off eventually.

 

^^^^ I have Speed Pro Hyperutectic's in the 350 in my Chevelle...

 

Yep I've got em in my 383 which is in my IROC. I love em! Bet they don't make em for the LSJ's though. I'd just go with a high quality hyperutectic piston and good rings...

 

When I had my engine re-built the guy said that Diamond is like the bottome of the barrel for quality. He also explained to me that ceramic coating is kinda like a barier that reduces friction. He was not a huge fan of it for the price. Don't know if any of what he said is BS but I thought I would pass it along. He wasn't a "normal" mechanic... this guy builds race cars so I trusted him. *shrug*

 

Personally I would go with non coated...

 

I'm definitely not going with hyper-eutectic pistons. They are the weakest, same type of metal as the stock ones.

I'm leaning towards the non coated ones, I just can't justify the extra $225 that could go to the rest of the rebuild parts.

 

yo dan your putting in new pistons? why?

 

Well, cylinder 1 was low on compression to my knowledge for about 2 months. Now, it's down to 118 and it's well beyond obvious the motor is blown. Not surprised to say the least, and when the pistons come in I can really spray the motor.