Oval Chamber Pistons

[1slowmax]

Forged would most definitely be the safer way to go.

Although, Jon's (fingers) been looking to see just what the cast pistons are worth, i.e, how much power they can tolerate, I haven't heard of a failure yet and guys are pushin them pretty good, haven't they been in 1200hp applications already? You say your only looking for a few passes, you'll have a spare built motor available, so you may be just the guy Jon has been waiting for

:dontknow:

It's your money, do what feels right:thumb:

Im down for some testing and might even be interested in buying two sets.

By a few passes i mean i would like them to last a season

 

[JoshH]

You can get fingers' pistons in forged. Not sure if you knew.

 

[1slowmax]

You can get fingers' pistons in forged. Not sure if you knew.

Yea waiting on PM for info and prices. Thanks man:thumb:

 

[Fingers]

Everything has a breaking point. Just don't know where that point is for these pistons. Apparently north of the current installations.

 

[Fingers]

I don't want to go Nazi on here, but I do want to stay on topic guys.

 

[02ilduramax]

can you pm me a price on .020 overs

 

[1slowmax]

Thanks for the PM, sent you some more questions. Let me know. Interested and ready to make a move on something.

 

[MarkBroviak]

Brett has made at least ten 9sec passes on cast fingers pistons at 148mph in his
C10 with vgt twins. I am almost 1100hp with vgt twins and single cp3 on cast fingers pistons. I have sled pullers running these pistons in 1200+hp setups and so far we have not had a single issue with them. We are extremely pleased with the performance!:thumb:

 

[DURAMXD]

Brett has made at least ten 9sec passes on cast fingers pistons at 148mph in his
C10 with vgt twins. I am almost 1100hp with vgt twins and single cp3 on cast fingers pistons. I have sled pullers running these pistons in 1200+hp setups and so far we have not had a single issue with them. We are extremely pleased with the performance!:thumb:

Have you put any forged sets in anything yet?

 

[MarkBroviak]

A couple of sets in pullers iirc. Don't have dyno numbers from them yet.

 

[MAXX IT OUT]

I was wondering, for use "budget" guys, use stock LB7 pistons and cut the oval into them. I would guess the oval would not be the sames as on the cast and forged pistons, but with your simulation showing that the oval is stronger the just delipping, something like this would better? I would of loved to use your piston in my build, couldn't, that is why I am asking.:thumb:

 

[chevyburnout1]

That wouldn't be the same. The point of the oval is to keep the CC's the same but add more material in the bottom of the oval area where the wrist pin is at.

 

[Burn Down]

The oval ports in fingers pistons can be/are the same volume as factory... If you cut the oval into factory pistons you would make the chamber so large that compression would suffer. Besides the way the oval is designed it puts more piston material parallel with the wrist pin, which is where they like to crack. A stock piston that had a oval chamber cut in it would have the same amount of material over the wrist pin therefore making it just a weak as a stocker with really low compression.

 

[Fingers]

Almost regardless of the required compression, I leave the same amount of material over the pin. That material is already gone on the stock piston bowl, and that is what make these oval pistons "different". Most any compression can be dialed in by adjusting the volume of the end chambers.

 

[JoshH]

I'll say I was very impressed with how much more material these have over the wrist pin once I got them in my hands. I can definitely see how these will be much less likely to crack.

In case anyone is curious, my scale says these piston assemblies (piston, rings, pins, clips) are 80 grams lighter than a stock LMM piston assembly.

 

[1slowmax]

I'll say I was very impressed with how much more material these have over the wrist pin once I got them in my hands. I can definitely see how these will be much less likely to crack.

In case anyone is curious, my scale says these piston assemblies (piston, rings, pins, clips) are 80 grams lighter than a stock LMM piston assembly.

Thats awesome :woott:

 

[paint94979]

Thats awesome :woott:

Are you going to run a set in your truck?

 

[Bigdirtylbz07]

i received my pistons jon, these pistons are a work of art!! i almost wannna sit a set on a shelf and just look at em haha. very good craftsmanship:thumb:

 

[Fingers]

Thanks!

 

[20dirtymax03]

Yes they sure are pretty. To bad no one will see them.