sbc rod length in a 350

[Grumpy]

If 6 inch is better for my 350 , will a 6.25 inch be even better also?,
I have `pistons for 6 inch rods , can the pistons work with the 6.25 rods?

thanks

well almost true ("no the same pistons won,t work in the stock block with longer connecting rods,") if they are pistons for 6" rods IN A 350 the piston pin height is set, but>>>>>the 6.25" rods will work with those same 350 pistons,if, the crank stroke is short enough (IE) those rods and pistons designed for a 3.48" stroke were used on a 3" stroke! CAN YOU SAY 302 CHEVY

look a 3.48 stroke 350 engine built for a longer rod length, commonly uses a 6" rod with a 9.025" deck height
thats 6" rod + 1.74 (1/2 stroke) =7.74" so 9.025 minus 1.285 pin height
now a 1.285 pin height and a 6.25" rod in a 9.025 block will match a 1.49" (1/2 STROKE) DISTANCE WHICH IS A 3" STROKE CRANK

there are some slight advantages IF YOU PICK A CAM,COMPRESSION RATIO,INTAKE RUNNER SIZE and MATCH YOUR EXHAUST SCAVENGING, as the rod gets longer the piston dwell time increases slightly and the rod to stroke ratio improves, at least in theory you should pick up a few hp in the over 5000 rpm range due to the lower friction on ring drag and the more efficient use of cylinder pressure on the power stroke ,.....but if you don,t carefully pick the correct cam to take advantage of the slightly longer pressure peak available in the cylinder, you most likely gain little if anything!, PERSONALLY,IF I was building a 302 Id USE THE 6.25" rods and matching pistons without a second thought, ESPECIALLY if I already owned those parts

RELATED INFO
http://garage.grumpysperformance.co...ng-piston-pin-height-compression-height.5064/

http://garage.grumpysperformance.com/index.php?threads/can-you-plan-for-quench.11298/#post-51315

http://garage.grumpysperformance.com/index.php?threads/connecting-rod-strength-h-vs-i-beam.1168/

http://garage.grumpysperformance.co...onnecting-rod-rod-length-too-stroke-info.510/

 

[Loves302Chevy]

PERSONALLY,IF I was building a 302 Id USE THE 6.25" rods and matching pistons without a second thought, ESPECIALLY if I already owned those parts

Now you're talking. That's exactly the way I would do it too. Compared to the stock Chevy version (5.7" rod),
you benefit from longer rods as well as a much lighter piston because of the shorter piston compression height.
All better for high rpm (and less stress) with that short 3.00" stroke.