Hi all,

Craig from crankshaft engineering is assisting me with some bearing clearance issues. He said for blue printing, the aluminium case main studs might have different required torque specs compared to the stock vw magnesium cases.

Its a CBPerformance Aluminium Case. I have sent an email to CBperformance, but they said on the website it could take a week for a reply. Would anyone know if factory torque specs still stand?

Thanks,
Chris.

PM sent.

Kev

With stock hardware I use stock spec

Thanks guys.

There's little factory hardware on this. Has VW oem main bearings plugged around a forged c/w 74mm stroke chinese crank.

Planned Red line won't be very high, at most 6000rpm allowance when forced induction bolted on (Stage 2). Its certain that SP heads won't be anywhere near that prior to stage 2. If its too bad i'll conclude the SP experiment as a dud as swap the heads out.

Update: CB Performance where quick to reply! wow, they just said factory 25 ft/lbs.

just trying to hlp it's not that changing the metal that requires the mild torquen setting it's the whole engine being air cooled it goes from cool to bloody hot when that happens the studs will be holding about 80 foot pounds and by screwing them down you will be asking them to hold much more and thats when head studs pull out
keep the book tensions