FIRECHILD wrote:The guy thats gonna put my motor together said I would be better off with big stroke . Its for a 3/8 mile asphalt track. I already ordered the crank,rods and pistons fo a big bore short stroke,just want some opinions,should I stick with what I ordered or call and see if I can cancel,he said he talked to a couple of guys that have built 2 bbl motors and they said I wouldnt make as much power. Any suggestions Thanks JEFF
Any cast iron head ported is allowed, solid mech cam,500 cfm 2 barrel must pass gauge,360 ci 12.5 comp. What im wanting to build 4.125 bore 3.250 stroke,347 SB chevy Victor jr ,sideways HVH ss carb spacer with a Braswell carbProPower engines wrote:Since you have rules to follow you leftout the real importants stuff like what heads are allowed cam hyd. soild,roller, intake, engine size limit and what carb allowed Crank stroke rod length..................
3V Performance wrote:Is there a gear rule? or max rpm controlled by a chip?
If not then:
Biggest bore first for block used then match biggest crank to max cubic inch.
xstfudonniex wrote:smaller bores generally resist detonation better, therefore respond to nitrous and boost better, Bigger bores generally allow better cylinder heads because you can run bigger valves and they will not be as shrouded, the smaller strokers also allow for more RPM and less piston speed.
MadBill wrote:There's a graph in the old HP "How to Hotrod Big-block Chevys" book that shows GM data on motoring friction torque of a 4.25" x 3.46" 392 c.i. Vs a 4.09" x 3.76" 396 c.i. The short stroke engine has as much as 20% less...
FIRECHILD wrote:The guy thats gonna put my motor together said I would be better off with big stroke . Its for a 3/8 mile asphalt track.