Crankshafts for 5.7 or 6.0" rods

b73 · Post by **b73** » Fri Jul 22, 2005 11:32 am

I see that Eagle and Scat ect list SBC 383 cranks designed for 5.7 and 6.0" conrods. Whats the difference between these cranks? I would have thought that the cranks were the same, and any difference in rod length would be taken care of by selecting a piston with the correct compression height..

Wolfplace · Post by **Wolfplace** » Fri Jul 22, 2005 11:58 am

b73 wrote:I see that Eagle and Scat ect list SBC 383 cranks designed for 5.7 and 6.0" conrods. Whats the difference between these cranks? I would have thought that the cranks were the same, and any difference in rod length would be taken care of by selecting a piston with the correct compression height..

=
Counterweights are larger in diameter for a 6" rod crank which makes internal balancing much easier & less expensive.
They need to be cut down for the 5.7 rod or when you get to BDC very bad things happen

Shaffy · Post by **Shaffy** » Fri Jul 22, 2005 1:18 pm

What Wolfe said.. I also heard from a supplier of mine that Eagle is discontinuing the 6inch crank as the 5.7 crank will suffice for the 6in rod applications..

b73 · Post by **b73** » Sat Jul 23, 2005 6:50 am

Thanks, that makes sense...

Don Terrill’s Speed-Talk

Crankshafts for 5.7 or 6.0" rods

Crankshafts for 5.7 or 6.0" rods

Re: Crankshafts for 5.7 or 6.0" rods