like the L78, had an aluminum intake manifold for weight savings and better flow, but most had cast iron manifolds. Compression on most 396 big blocks was 10.25:1, but the L78 was higher at 11.0:1.
Starting with the basics like cams, headers, and intake mods can take the 454 big block a long way. If you’re sticking with the low factory compression ratio then you might want to go for high-torque cams. Cams with wide lobe separation and short duration are a good bet with low comp...
made the 600/900hp specs - it was a beautiful engine with a nice easy idle, huge torque, and a 5800rpm power peak. But a trip to the track showed that traction issues with the Chevelle meant that I needed about 750hp to run 9.9s 'on the motor' and more like 1200+hp to run 8.9...
87cc Intake Valve Dia. 2.165 in. Exhaust Valve Dia. 1.590 in. Cylinder Head Bolt Style Torque to Yield (TTY) Cylinder Head Bolt Size (10) M11 x 2 x 100, (5) M8 x 1.25 x 45Camshaft Specifications Camshaft P/N 12623066 Duration @ .050 in. (int./exh.) 195°/201° Valve Lift (...
(2 stage - off the line on the plate and down the track on the fogger) to avoid hitting the tires to hard with all of that nitrous torque. We are also looking at a long term project of fabricating a new front end that would reduce the car weight by another 200+ lbs and would ...
the conversion went rather quickly. We put thread locking compound on all three cam gear bolts, torqued them in place, lubed the chain, and installed the front cover and oil pan. With the harmonic balancer in place and the water pump back on we were ready to install the in...
LS SeriesDispHP / TorqueCam DurationCam deg intake / exhaustCam liftValve dia inRocker Arm rationComp RatioBoreStroke LS1346 cid/ 5.7L350/3650.050 in200/203.500/.5002.00/1.551.710.25:13.8983.622 LS6346 cid/ 5.7L405/4000.050 in204/211.525/.5252.00/1.551.710.50:13.8983.622 ...