THERE'S A DAMN GOOD REASON WHY THE 383-406 cubic inch SBC combos are currently far more popular than the older 302-327 SBC engines and that's simply because the cost will be fairly similar but the results will favor the larger displacement combos by a wide margin if you do your home work and build both to their respective full potentials
and I doubt the cost would be all that much different after either build was completed
if a 302 can make 1.35 hp and ft lbs of torque per cubic inch you get
about 408 ft lbs and 408 hp
if a 383 can make 1.30 hp and ft lbs of torque per cubic inch you get
about 498 ft lbs and 498 hp
lets put both those engines in a 3400 lb car and calculate the results assuming 80% at the rear wheels
http://www.wallaceracing.com/et-hp-mph.php
302-408 flywheel hp x .80=327 hp in a 3400 lb car that should give near
12.71 et at 106.3 MPH
383-498 flywheel hp x .80=398 hp in a 3400 lb car that should give near
11.91 et at 113.5 MPH
http://garage.grumpysperformance.com/index.php?threads/tbucket-engine-project-dart-shp.3814/
http://garage.grumpysperformance.com/index.php?threads/the-new-215cc-vortec-heads.266/#post-35948
http://garage.grumpysperformance.co...vortecs-on-a-400-short-block.4462/#post-17247
http://garage.grumpysperformance.co...ding-sbc-crate-engine-heads.13041/#post-69348
http://garage.grumpysperformance.co...cu-sbc-in-vortec-head-build.12080/#post-57865
http://garage.grumpysperformance.com/index.php?threads/port-and-runner-math.148/#post-34936
http://garage.grumpysperformance.co...ed-up-fuelie-heads-for-cheap.2099/#post-50526
http://garage.grumpysperformance.com/index.php?threads/heads-for-302-sbc.11492/#post-52993
http://garage.grumpysperformance.com/index.php?threads/precision-measuring-tools.1390/#post-68861
http://garage.grumpysperformance.co...sbc-vs-383-sbc-dyno-results.10210/#post-40509
and I doubt the cost would be all that much different after either build was completed
if a 302 can make 1.35 hp and ft lbs of torque per cubic inch you get
about 408 ft lbs and 408 hp
if a 383 can make 1.30 hp and ft lbs of torque per cubic inch you get
about 498 ft lbs and 498 hp
lets put both those engines in a 3400 lb car and calculate the results assuming 80% at the rear wheels
http://www.wallaceracing.com/et-hp-mph.php
302-408 flywheel hp x .80=327 hp in a 3400 lb car that should give near
12.71 et at 106.3 MPH
383-498 flywheel hp x .80=398 hp in a 3400 lb car that should give near
11.91 et at 113.5 MPH
http://garage.grumpysperformance.com/index.php?threads/tbucket-engine-project-dart-shp.3814/
http://garage.grumpysperformance.com/index.php?threads/the-new-215cc-vortec-heads.266/#post-35948
http://garage.grumpysperformance.co...vortecs-on-a-400-short-block.4462/#post-17247
http://garage.grumpysperformance.co...ding-sbc-crate-engine-heads.13041/#post-69348
http://garage.grumpysperformance.co...cu-sbc-in-vortec-head-build.12080/#post-57865
http://garage.grumpysperformance.com/index.php?threads/port-and-runner-math.148/#post-34936
http://garage.grumpysperformance.co...ed-up-fuelie-heads-for-cheap.2099/#post-50526
http://garage.grumpysperformance.com/index.php?threads/heads-for-302-sbc.11492/#post-52993
http://garage.grumpysperformance.com/index.php?threads/precision-measuring-tools.1390/#post-68861
http://garage.grumpysperformance.co...sbc-vs-383-sbc-dyno-results.10210/#post-40509
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