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-   -   SBC Rod Length question (https://www.racingjunk.com/forums/showthread.php?t=23693)

visualsmoke 07-11-2009 01:14 PM

Thanks
 
Thanks for your insight on my question. Regarding the advantages of the longer rod, is there an RPM range where those advantages come into play the most? Low RPM? High RPM? Or is it an improvement across the board?

littlehotrod 07-21-2009 03:37 AM

hey
 
well thanks

littlehotrod 07-21-2009 03:38 AM

i mean a 383 Stroker Crank Not 282..

greenone60 07-25-2009 02:02 PM

a 6 inch rod will add about 15 extra hp.

littlehotrod 07-25-2009 08:42 PM

hey
 
wow i didnt know it was that much more..i guess u learn something everyday..

OneBadGMC 07-25-2009 10:11 PM

http://www.stahlheaders.com/Lit_Rod%20Length.htm

mopar1962 07-29-2009 01:24 PM

I would think the long rod would use a shorter,lighter piston,resulting in a lighter rotating assembly, I would use a lighter rod with the lighter piston weight, I would also check to make sure clearancing is properly done with the longer rods. With the lighter pistons I would lighten the crank a lil bit,I would also use new rods as ya dont know how many cycles are on a used rod. A longer rod will use a lighter piston adding life to the rods. Finally, I would shoot for a 1.80 rod ratio, bad lil engine built on a budget.... voila

ARUSSELL 07-29-2009 02:31 PM


Originally Posted by zipper06

Originally Posted by ARUSSELL
The shorter the rod the lower the torque band, If you truely want low end go with a stock 400 rod 5.565

Hey Mr. Russell

Where you been?, i've been meaning to ask you what do you recomment for piston clearance, on a street driven 406" forged 2618 mat'l piston that will probablly not see more than 7200 RPM. I've got .006 but i think .0045/.005 would have been better. Hopefully i can keep it cool no blk. filler.

Right on, i'm building one right now, 406" flattops, eagle 4340 forged crank, 2618 alum. forged flat tops, 5.565 (h) beams and track 1 heads, 850 DP'er, 1.76 PG with pro brake, for my prostreet 1998 stepside Sonoma, i think about 2800 lbs. I believe i can drive it to sonic and the track and run 10.50's with street slicks.

Zip.

Im sorry I missed this one, I hope you still need help. I would run is .0050, but .0060 is no problem, just a little noise (but it does not seam like that would bother you)


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