Dishing pistons

[Peter]

Hello guys,
to lower the CR for the turbo i would like to dish my wiseco pistons.
11 cc would be the max..
i found out that a dish of 84 mm and 2 mm deep would give me that.
so there would be an edge of 5 mm.
Does this sound ok?

thanks

[Zach Gomulka]

I don't know about your pistons, but this should help a little:

http://cal-look.no/lounge/index.php/topic,6664.0.html

[BeetleBug]

In the pictures below you can see the dish in my Wiseco pistons - 11cc:

[ Attachment: You are not allowed to view attachments ]

Best rgs
BB

[K-Roc]

I was going to dish some Weisco's and was thinking that it would be better to mirror the chamber shape in the piston as this would keep the Flat areas of the piston and the chamber ( the squish band ) at my .040" deck... My thinking is that keeping a tight squish band  helps reduce the chance of detonation.

You guys have any thoughts on this?

Darren

[ED2.4]

I was going to dish some Weisco's and was thinking that it would be better to mirror the chamber shape in the piston as this would keep the Flat areas of the piston and the chamber ( the squish band ) at my .040" deck... My thinking is that keeping a tight squish band  helps reduce the chance of detonation.

You guys have any thoughts on this?

Darren

+1, i try to keep the chamber shape too for the dish,better squish  as you say ,
here's a good example :

http://www.lnengineering.com/type1.html

[Peter]

Thanks for the reply guys,
i would like to mirror the dishes,
but that way, i wont be able to drop the CR enough..

[ED2.4]

yes and no, because the dish is wider than 84 mm on the ends ,
so   it must  compensate a bit ,
 nice for a N/A engine ,but on a turbo i would not go  closer from the edge/first ring than 5mm

[Peter]

thanks guys,
well i have a new solution;
a guy i know can drop off the heads in germany to cnc the chambers..
he thinks i will be able to get 10 cc more out of them