Welded v Forged Cranks

59BUG Casual Dubber

27 posts · joined Nov 2006 · 4 May 2007, 1:38 pm

#589295

Hi guys,

Im tossing up between buying a 69mm welded counterweight crank ( exchange from gene berg ) or buying a forged 69mm one from some one else.

Just wondering if anyone has used a welded gene berg crank before. Ive heard that the welded cranks can be just as good as forgies in lower power cars.

Nate

BTW the engine will be 69x85.5 or 69x90.5 havn't made up mind yet.

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 4 May 2007, 6:03 pm

#589343

Hmm, good question.

Simple answer would be to get a VW factory one counterweighted here in Australia.
Saves the hassle with exchanges and shipping costs.

If you want one step better have it nitrided and ground to suit your case and bearings.

I used a nitrided & counterweighted VW crank in my supercharged 1775cc combo,
and it served me well with about 275hp and over 7500 rpm.

westi wrote:That's mad Alan.

Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 4 May 2007, 6:36 pm

#589352

If you are staying with the standard stroke why not just go straight to 94's ?

As for the cranks, I have a Stan Pobjoy welded standard VW (which comes crack tested nitrided,counterweighted, balanced and ground for $770) and it revs all day to 8000rpm.

Buy locally 👍