4 mil pistons

[jriffe23]

ok so here is the deal, im building a 4 mil and i was wanting to know if i have to use 795 or can i use 513 without a spacer plate with the correct cut domes??

[sheerider11]

110 or 115 rod?

[jriffe23]

115 rod. Sorry i forgot to put that

[sheerider11]

No. The piston will contact the rod

[jriffe23]

So I have to have 795s?

 

 

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[sheerider11]

Or the new 4 mil pistons that have the windows moved and the pin right.

[Atomic Monkey]

Yes. They're meant to take up the 5mm of the longer rod when used with stock stroke. With the 4 mill you either have to run the spacer, or even better get the 11882 pistons with the 0.60 base gasket

[Currie Motorsports]

795 or 573

[Atomic Monkey]

I'm doing a 4mil long rod with the 11882 piston. They're 1mm over deck with stock base gaskets instead of 2mm like the 795 or 573, and have the piston windows in the correct spot for the 4mil stroker. The 573 is a blaster piston and needs the correct dome shape... its different from the Banshee.

The cheap way to use the 11882 piston is to get the thicker base gasket, or like I'm doing, adjust the port heights, and get the correct domes to compensate for the additional height. I think you can only find these pistons on Ebay.