I am building a Darton re-sleeved LS7 with high piston speed and would like a recommendation on the absolute best forged piston.

Thanks,
DF

 

i would go with wiseco, and i would also get them coated if funds allow.

 

I've been told that coating helps, but eventually wears of and your tolerances increase.

 

The coating are so thin the small change doesnt matter but ive had coated piston that after 30k miles coating still looked good

 

well you are not supposed to make the piston smaller just because you are coating it. you measure the bore, get the appropriate piston and then you coat it. the coating is so thin it really does not make that much difference. look at the factory pistons.

 

Doesn't the potential damage occur with the connecting rod and bearings with high piston speed?


.

 

If you are talking higher than normal piston speed, what stroke are you talking if non stock 4" stroke? (its either a hi rpm engine or a longer stroke or both to be talking about "high piston speed" right? )

If the Darton sleeves are longer for a longer stroke, best to talk to Wiseco or Diamond (etc) and see what skirt profile/length + crown/ring land setup they recommend for your application.

 

J&E has always been the "ultimate" piston to me. But Diamond or Wiesco will work just fine also!

 

https://ls1tech.com/forums/generatio...o-pistons.html

^^^ look here. i started this trhead when i didnt know anything. and i have learned a lot since then.

but a Darton re-sleeve, huh. ERL do that for you? they did mine. great block.

talk to Sean. he knows his ****.

 

I'm between a 4.125 and a 4.250 stroke. The programs say the cam will make good power to 7500 rpm.

 

^^^ my next nuild will be a 4.25 bore with a small stroke. like 3.622 or less

 

Why?

 

^^^ motors with smaller stroke like to rev

 

Nice. Naturally aspirated?

 

Yes.

 

Does any one here besides me run Ross pistons? When mine came in I placed on up next to the Wiesco, Diamon, and the JE pistons, WHO what a difference. Check into them. If I am not mistaking they are the number one piston for NASCAR and NHRA teams. I know when I ordered mine they told me there would be a delay do to the Nascar season was coming up and they had to get all of those orders out first.

Ross Pistons, check them out, you said the best and I would be suprised if there is anything better then Ross Pistons.

My .02

 

^ Thank You.

 

i like Wiseco & CP pistons myself,never used Ross pistons before but have heard only good about them

 

I'll be using CP's in my darton sleeved block. I hear nothing but good about wiseco though.

 

I run a set of ross custom nitrous pistons in a lsx 427, and i'd have to say they are pretty nice! They have reinforcement (webbing) on the underside of the piston which i thought was pretty cool! Defenitely some nice pistons, and i'll be using them again for my next build.