Oval Chamber Pistons

[kenny]

piston coating

Coatings are a thermal barrier and polishing is not. That would be the reason to do one vs the other.

Thermal barrier to prevent what? Oil baking on the bottom side? I have seen people run these both with a top coat and without. I havent found any feedback or benefit relating to coaitng the tops? Thanks for the response!

 

[Cknight199]

Thermal barrier to prevent what? Oil baking on the bottom side? I have seen people run these both with a top coat and without. I havent found any feedback or benefit relating to coaitng the tops? Thanks for the response!

In theory the coating helps the piston withstand higher egt's.

 

[kenny]

piston top coating

In theory the coating helps the piston withstand higher egt's.

Oh, I gotcha. Makes sense then. Thanks for the reply!!

 

[LBZ]

In theory the coating helps the piston withstand higher egt's.

I don't know how much better they are as some have still melted/ burnt the coating off but I suppose it's better than nothing.

 

[S Phinney]

I don't know how much better they are as some have still melted/ burnt the coating off but I suppose it's better than nothing.

There are really good coatings out there but not available to the general public. NASA used these on the space shuttles to prevent meltdown on reentry in the atmosphere. I wish it was available for purchase somewhere. I had iron my original set of pistons but that source closed their doors.

 

[WolfLMM]

They are available to the public. It's just that nobody has 50k laying around to spray a set of pistons. I joked around with a NASA engineer a few months ago about spraying some pistons for me. (We are working on new injectors/rocket engines for them, all of which are sprayed with exotic materials which I then machine) he said sure give them to me when you ship us the liners for spraying lol.

 

[kenny]

They are available to the public. It's just that nobody has 50k laying around to spray a set of pistons. I joked around with a NASA engineer a few months ago about spraying some pistons for me. (We are working on new injectors/rocket engines for them, all of which are sprayed with exotic materials which I then machine) he said sure give them to me when you ship us the liners for spraying lol.

Haha, thats awesome!!..

 

[Burn Down]

Wolf I got 8 coming your way

 

[Cknight199]

Luckily some piston companies are starting to test different coatings. I believe cp and weisco both are in testing stages of some new technology for coatings.

 

[S Phinney]

Akadized coatings method is from all data that I have seen is hands down the best possible stuff. That is what I can't get anymore.

 

[minisub]

I'm not following this fork.

What is it that an Oval piston coated with unobtanium do that the current polished one not do based on real-world experiences thus far?

 

[WolfLMM]

In reality, give the piston a few more seconds of life, in really bad conditions. It would only buy you a small amount of time. That's it.

 

[mike diesel]

But when you have $15,000+ into your engine, what's a few hundred bucks more for coated Pistons that will only help reliability.

 

[Cknight199]

I believe coatings also help with n2o. I heard that somewhere. It could be false information, if someone wouldn't mind clarifying.

 

[MarkBroviak]

Ummm, if you need coating on them to stay alive you are doing something wrong in the way you are making hp. Brett's pistons are not coated and barely polished and look like new everytime the heads were off.:thumb:

 

[Chevy1925]

Coating is not definitive to me in making stock pistons last. My pistons did not receive any coating and if/when they do crack, fingers pistons will be going in.

 

[WolfLMM]

Ummm, if you need coating on them to stay alive you are doing something wrong in the way you are making hp. Brett's pistons are not coated and barely polished and look like new everytime the heads were off.:thumb:

^^this.

 

[schulte]

I just blew apart my crankshaft in my motor with Fingers pistons; they have 40 to 50,000 miles on them, I need to do some checking and see exactly how many miles it was. Could be north of 50,000 even.

They've been run pretty hard; this was a 1,000rwhp truck that has a couple dozen hooks on it as well as a bunch of dyno pulls, and I daily drove it for 3 years in a pretty mean way. As in, on the street I drove it around no ****s given, beating on it pretty regularly.

What all do you want to see to evaluate the condition of the pistons? High res pics?

 

[Fingers]

Aw shoot.

First thing is to clean them well without using an abrasive. Carb cleaner and brake cleaner. Multiple passes.

Post the pics here and we will see what they look like.

 

[Fingers]

For those that don't know, these are one of the very first sets of Finger pistons.