forged rods standard pistons?

[Billman]

Weight difference and quality.
And they are clubsy as hell.

Some can have over 10-15 g difference. that's madness

You speak about Pistons or Parner rods here?

My parner had:

The Conrod weight in Gramms (158mm, 23mmPin) without bolts:

1. 551,40
2. 550,60
3. 551,50
4. 551,86
5. 551,40


Is it bad? Doeas anyone else had problems with the weight and quality? What are the HP and Torque rates running on 5 Cyl with PArner?

[Jamo]

23mm wrist pin?

[prosty]

Sounds weird with 23 mm. That's not too bad though for parner weight wise.. The power is no problem, they can surely handle 800-1000 hp, but I would never use them. The engine builders here say that they are crap and built with low-tec machinery and "clumbsy"

[BRY]

Grant really likes his SPM rods and he has had them on the Dynopack at 648bhp at the hubs.
Each to their own I suppose.
They don't bend and that's the main thing

[Billman]

23mm wrist pin?

I had the option between 159mm and 20mm pin and 158 and 23 mm Pin. I bought the second.

I hope i am not going to have problems with fitment.

[Bram]

I believe the standard i5 pistons need 22mm pins? I hope they don't start floating in 23 mm rings on your conrods and damage something.....

[Jamo]

I believe the standard i5 pistons need 22mm pins? I hope they don't start floating in 23 mm rings on your conrods and damage something.....

Standard S2 wrist pin is 20mm, typical upgrade is then 22mm which is what i'll be running.

Never heard of 23mm wrist pin in an S2, I can see why your going the CP pistons route now same as myself as it's a bit non standard.

[Billman]

Excactly. The Parner was a Cheap option to have a nice big conrod for the stroker,i of course choosed the 23 pin over the 20mm since the custom pistons is either way a must for me.

[andy112]

Hey how are the 7A pistons in comparison to 3b/aan/etc. pistons, weak?