Take your dyno guesses now!!
Those are some big flow numbers. My 18/15 deg conventional sbc heads flow your same 0.700 lift numbers, 377 cfm (superflow 1020 #s). With a similar lift (with more duration and a solid roller cam) on a 15:1 421 it hit 608 rwhp NA with a glide on gas. I don't know how you could be below 550 at the wheels with a more aggressive solid roller. When you have that kind of potential I don't know why you would leave so much on the table by using pump gas.
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Joined: Jan 2008
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Intake Exhaust (without pipe)
.200 162 126
.300 240 180
.400 302 218
.450 316 225
.500 340 236
.550 353 243
.600 361 250
.650 369 254
.700 377 257
.750 382 263
.800 388 268
.850 395
.900 399
.950 405
1.00 414
Those are the numbers on the heads. I was wrong the first time. The cool thing is, these heads never backup. Its a great port really!
.200 162 126
.300 240 180
.400 302 218
.450 316 225
.500 340 236
.550 353 243
.600 361 250
.650 369 254
.700 377 257
.750 382 263
.800 388 268
.850 395
.900 399
.950 405
1.00 414
Those are the numbers on the heads. I was wrong the first time. The cool thing is, these heads never backup. Its a great port really!
Those are some big flow numbers. My 18/15 deg conventional sbc heads flow your same 0.700 lift numbers, 377 cfm (superflow 1020 #s). With a similar lift (with more duration and a solid roller cam) on a 15:1 421 it hit 608 rwhp NA with a glide on gas. I don't know how you could be below 550 at the wheels with a more aggressive solid roller. When you have that kind of potential I don't know why you would leave so much on the table by using pump gas.
6speed car. this thing will see 600 at the wheels on motor. Intake Exhaust (without pipe)
.200 162 126
.300 240 180
.400 302 218
.450 316 225
.500 340 236
.550 353 243
.600 361 250
.650 369 254
.700 377 257
.750 382 263
.800 388 268
.850 395
.900 399
.950 405
1.00 414
Those are the numbers on the heads. I was wrong the first time. The cool thing is, these heads never backup. Its a great port really!
.200 162 126
.300 240 180
.400 302 218
.450 316 225
.500 340 236
.550 353 243
.600 361 250
.650 369 254
.700 377 257
.750 382 263
.800 388 268
.850 395
.900 399
.950 405
1.00 414
Those are the numbers on the heads. I was wrong the first time. The cool thing is, these heads never backup. Its a great port really!
what bore where they flowed on again? Seems interesting that you are not seeing the lose in flow at the lower lifts or a smaller increase due to shrouding of the valve.... not a porter in the world can equate for a larger valve small port problem the L92's seem to have. Dang valve is too close to the chamber wall.
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Verdad Gallardo Perhaps MY head porter is just THAT good! Just because they are a little better/different than you heads doesn't mean its bullshit. This motor has been in the works for over a year. Alot has been learned in this build. Like I said Boone else has ever done this.
Don't let the cam specs fool you. Its not an off the shelf lobe by any means. The closing speed of the intake valve is nuts
Should have no problem making 750 with that much cyl head right, Id think even more. I think we are making around 650-690 at flywheel Id guess, using 290-310 cfm max, with 42x inches. It peaks at 7400, so Im not sure about all the talk about crank limiting whatever. More stroke in any given engine makes more power. Cylinder heads and camshafts dont move air, pistons move air, they just open the right door. At the right time hopefully. And dont slam the door on the way in the house! They dont like that either.
