the 4v is cheaper because it comes with cast pistons not forged. The lightning motor comes with forged pistons. With that shortblock and a set of 320 dollar TMD h-beams and a balance job away from a rock solid little bullet of a motor.
The 4v block will net out 10.8:1 - 11.1:1 compression (I'm at 10.5:1). The L block will net out closer to 8.5:1 which will cost some NA power (not much) but makes for a great boost motor.
97mustang4.62v... Best cam depends on a lot of things. I'll BRB with the results of simulating your spec and an optimized timing for best HP and TQ. Realize that these are theoretical until someone tries them.
K... cam results: From virtual dyno the 230/236 is an ok cam with decent potential for as low as it lifts. A lot depends on the ramp rate. I was able to play with it a bit and got better results at the same lift with 226/240 on a 112.5 LSA. With a regular street grade ramp speed you'll see higher hp and tq across the board and a bit more power under the curve and that's on .500 lift. FWIW, my comp 270's show better power than either cam but lift .550.
Last edited by r3dn3ck : 11-25-2007 at 07:37 AM.
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