Guest dancaprar Posted April 2, 2005 Share Posted April 2, 2005 I was wondering which connecting rod length would be a better choice for a supercharged(roots) 383 stroker. The 6" or the 5.7"? Something about stroke/rod ratio comes to mind. Can anybody expound, if i have not been too vague? dan Quote Link to comment Share on other sites More sharing options...
Jolane Posted April 2, 2005 Share Posted April 2, 2005 Dan, I think that the choice comes down to available parts. I think the consensus is that the longer the rod, the better (better rod/stroke ratio, reduced piston side load, etc). For my 383, I used a SCAT 9000 crank designed for 6" rods. Same with the pistons, designed for 6" rods. Naturally, I used 6" rods. If you can get the right parts, I would vote 6" rods also for you. As for the LT1, I don't know what is available though. Sorry if this doesn't help... Joshua Quote Link to comment Share on other sites More sharing options...
Guest dancaprar Posted April 2, 2005 Share Posted April 2, 2005 Very helpful, the LT1s do have cranks designed for a 6" rod available in the aftermarket i was just looking for a little backing in the fact that 6" rods are better. Thank you. Quote Link to comment Share on other sites More sharing options...
Turbo Meister Posted April 2, 2005 Share Posted April 2, 2005 I was wondering which connecting rod length would be a better choice for a supercharged(roots) 383 stroker. Dan, I have the 6" rod for my TT383 Chevy. However, if I had to do it again I would go the 5.7" rod because the wrist pin would not intrude into the oil ring groove. The 6" rod, thus, requires a special support ring in addition to the oil ring to strengthen this area. Also, the 5.7 rod allows more meat to be located at the piston crown to handle elevated cylinder pressures. There are other considerations but for boost pressures I vote for the short rod. Hanns Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted April 2, 2005 Share Posted April 2, 2005 http://www.sallee-chevrolet.com/Scat/Connecting_Rods.html just a reminder! they make 5.850" long (H) connecting rods with 7/16" capscrew rod bolts that split the differance and have both the advantage of the pin kept out of the oil ring yet the longer than 5.7" length to reduce side thrust loads also Quote Link to comment Share on other sites More sharing options...
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