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Re: RB 440 vs. RB 500 vs. B 470 Pro's / Con's [Re: '72CudaRacer] #1823694
05/10/15 08:44 PM
05/10/15 08:44 PM
Joined: Jan 2003
Posts: 31,256
Oregon
A
AndyF Offline
I Win
AndyF  Offline
I Win
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Joined: Jan 2003
Posts: 31,256
Oregon
I meant just what I said. If you want a stock stroke bottom end that is stronger and lighter than stock then get a 3.75 crank from Molnar with the 2.200 rod journals. Add in some 7.100 long BB Chevy rods and the matching pistons to give you the compression ratio that you want and you're done. Diamond will make the pistons for a decent cost since all you need is a stock shelf piston with the pin moved up.

Re: RB 440 vs. RB 500 vs. B 470 Pro's / Con's [Re: AndyF] #1823780
05/10/15 10:09 PM
05/10/15 10:09 PM
Joined: Aug 2009
Posts: 2,076
Mooresburg, Tn
'
'72CudaRacer Offline OP
top fuel
'72CudaRacer  Offline OP
top fuel
'

Joined: Aug 2009
Posts: 2,076
Mooresburg, Tn
Thanks Andy and Greg, I never concidered that rod length, thought it was a typo. Hmmm.

Thanks,
Brian

Re: RB 440 vs. RB 500 vs. B 470 Pro's / Con's [Re: '72CudaRacer] #1824127
05/11/15 12:39 PM
05/11/15 12:39 PM
Joined: Jan 2003
Posts: 31,256
Oregon
A
AndyF Offline
I Win
AndyF  Offline
I Win
A

Joined: Jan 2003
Posts: 31,256
Oregon
The logical choices with BB Chevy rods are 6.70, 6.80 or 7.10. With a stock stroke the pistons are going to be super tall and heavy so there isn't much reason to stay with 6.7 or 6.8 rods. Might as well go with the 7.1 and take a little weight off. 7.1 rods are fairly common. If you go to Summit you'll probably find 20 different part numbers for them. Basically everyone makes 7.10 rods, they are very common for stroker motors.

If this is all new to you then you might want to pick up a copy of my big block Mopar book at Amazon. I have a lot of pictures in there of stroker motors and various components.

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