where to by 86mm M52 pistons

[torsten]

Hi guys,

For my frankenstein engine (M50B25 block and rods with M52B28 crank) I'm looking for 86mm pistons with an CR of about (8.5 - 8.8) :1.

I contact VAC a few days ago, but doesn't receive an answer till now. (Maybe they can't deliver this bore diameter)
Maybe somebody have an idea where I can buy such pistons else?

Thanks
Torsten

[e30tomo]

I know that TRM is offering 86.5mm 8,5:1 CR, but 86mm, huh... I presume that you will need to make a special order on pistons if you want to go 86mm route...

[wlad]

i've bought mine from importperformanceparts.net S50B30 std 86mm bore, but ratio is 10:1

[torsten]

thank guys... I'm going to buy these pistons from bavariansolutions.com

He offered me Ross pistons - I never heard that brand before, so I hope they will work well as CP Pistons.

[320iGUY]

pretty sure the m60, or an S52 has this diameter.. I wrote down the dimension so i know its a bmw oe part.. but ill have to look.

[m3boost]

call these people. Not sure if you'll find the compression you want, 9 to 1 maybe

https://www.cnc-motorsports.com/ke12...mm-10-0-1.html

[vollosso]

I Have made a few designs for m52, easy enough for that bore diameter. Je and Diamond produce our piston designs. here: https://22rpd.com/shop/product/95