My new piston 3.0+

[Old H2S]

It will get to 330..

[icarp]

All numbers at the crank

Torque is, 267 lb/ft 3950 rpm and 272 lb/ft @4425 rpm and 270 lb/ft @4100 rpm and 267 lb/ft @5325 rpm, Thats 5lb/ft of variation in TQ over 1325 rpm

Also, 221 lb/ft @2100 rpm



More to come

Ian

[Jpapgar]

Still have sets avail.
Who wants to make some power

[Axel84]

You got pistons for the 2.0S 1969? And 3.4

[Jpapgar]

Originally Posted by Axel84

You got pistons for the 2.0S 1969? And 3.4

The 2.0 no
But we have sets for the 3.4 avail

[Mixed76]

Originally Posted by icarp

All numbers at the crank

Torque is, 267 lb/ft 3950 rpm and 272 lb/ft @4425 rpm and 270 lb/ft @4100 rpm and 267 lb/ft @5325 rpm, Thats 5lb/ft of variation in TQ over 1325 rpm

Also, 221 lb/ft @2100 rpm



More to come

Ian

78.5-80 lb-ft torque per liter is pretty solid!

Sent from my Pixel 7 using Tapatalk

[KMoore68]

I'm doing some planning around rebuilding my 2.7, would these new pistons be a good idea?

[mikedsilva]

Is there any value in using this design for a turbo engine build?
My 3.0sc engine is to be rebuilt using 964 crank and rods, and aiming for around 8.5;1....

Not sure if James can have a set custom made with correct pin heights etc?

[icarp]

Originally Posted by mikedsilva

Is there any value in using this design for a turbo engine build?
My 3.0sc engine is to be rebuilt using 964 crank and rods, and aiming for around 8.5;1....

Not sure if James can have a set custom made with correct pin heights etc?

Mike , this piston is designed to take advantage of the scavenge effect of valve overlap.
Hence the trough cut in the center of the piston.
With a turbo the best bet is the soft dome and sometimes a hollow in the center.
Forced induction makes up for the scavenge effect.

For all other NA 911 engines this piston is very effective .

Just my thoughts

[Jpapgar]

Originally Posted by mikedsilva

Is there any value in using this design for a turbo engine build?
My 3.0sc engine is to be rebuilt using 964 crank and rods, and aiming for around 8.5;1....

Not sure if James can have a set custom made with correct pin heights etc?

Not currently making new sets. We have to move the current stock of 3.2-3.4 stuff on the shelf.

[Jpapgar]

Moved a few sets more dyno numbers soon from pelican members?

[Jpapgar]

Back up top

[Jpapgar]

Another set shipped waiting for a few dyno results

[Jpapgar]

Monthly humpback up top

[mikedsilva]

I've been wanting to try these but until someone actually posts their results from using them, I'll sit on the fence.
Surely someone must be running an engine with these by now? Or is the "absence of feedback", the feedback in itself?

no offence intended to the seller.

[Jeff Alton]

Mike, I am sitting on my 74.4 stroke 98mm set waiting for a build where the client wants to turn a 3.2 into a 3.4. We have been doing smaller and largerdisplacement and watercooled mostly lately. But I am looking forward to buiilding a motor with them.

Cheers