[Stan Weiss]

Originally Posted by pastry_chef

Intake 11468
Exhaust 11470

252 / 256 @ .050
111 LSA - 107.5 IC
Rockers 1.92 / 1.86 - .020 lash.

Peak 663 @ 6500 RPM - 663 @ 6750
4500 to 6500 avg = 595 HP.

Another metric 255 / 259 dur @ .050 valve lift.
----------------------------------------------------------------
For a few of the combinations I looked at duration @ .050 VALVE LIFT.

TMC cam 1 with 2.1 / 2.0 rockers = 269 / 271 dur @ .050 valve lift

Brian .465 lobe solid cam with 1.65 rockers .020 lash = 259 / 268 dur @ .050 valve lift.

-----------------------------
New combo.
HXL 2231 intake, HXX 12203 exhaust.
270 / 274 @ .050 cam duration
108 LSA - 105 IC.
1.7 rockers - .020 lash.

Top performance so far.
Peak 684 @ 6500 RPM.
Avg 4500 to 6500 = 612 HP.

Duration @ .050 valve lift is also the highest - 270 / 274 dur @ .050 valve lift.

Mike,
Thanks. Would have happened to run that sim high and maybe have 7000 and 7250 HP numbers?

Stan

[pastry_chef]

Originally Posted by Stan Weiss

Mike,
Thanks. Would have happened to run that sim high and maybe have 7000 and 7250 HP numbers?

Stan

For the HXL / HXX lobes with 1.7 ratio.

677 @ 6750
663 @ 7000
652 @ 7250

All runs have been using "large open header" but nothing more specific.
It has the power to tune for primary lengths, collector lengths and taper. Also stepped pipes.

[Stan Weiss]

Originally Posted by pastry_chef

Intake 11468
Exhaust 11470

252 / 256 @ .050
111 LSA - 107.5 IC
Rockers 1.92 / 1.86 - .020 lash.

Peak 663 @ 6500 RPM - 663 @ 6750
4500 to 6500 avg = 595 HP.

Mike,
Sorry I must not have highlighted this one. I wanted to see how it hung on after peak.

Stan

[pastry_chef]

Originally Posted by Stan Weiss

Mike,
Sorry I must not have highlighted this one. I wanted to see how it hung on after peak.

Stan

Got it, this one was
663 @ 6750
656 @ 7000
644 @ 7250

[Scott Stoneburg]

Originally Posted by Scott Stoneburg

Thats what i was informed. Like I say i never tried it. My cam was 268/276 @ .050 with a .403 lobe. It made power to 6200-6500 I shifted at 6500. It didnt make crazy power, 550HP to the rear tires and went 10.20@ 131 in my 3500 lb street car.

I went back through my old emails, I remembered that incorrectly. Max rpm on that cam was 6500. Sorry for the confusion.

[PAUL K]

I PM'd the OP the correct cam specs he should run for his application..... After five pages I felt he should get the right cam.

[slowbird]

Pasty Chef since this thread is about wide ports on a stock block, just curious what your sim would say about a set of standard ports. Just pick one of the cam mentioned here. For the heads just use a standard 330cfm e-head. Maybe the wide ports will be down on power??

[pastry_chef]

Originally Posted by slowbird

Pasty Chef since this thread is about wide ports on a stock block, just curious what your sim would say about a set of standard ports. Just pick one of the cam mentioned here. For the heads just use a standard 330cfm e-head. Maybe the wide ports will be down on power??

I can check that tomorrow. I'll use the flow curves posted by AG here.
http://forums.maxperformanceinc.com/...3&postcount=60

Estimated CSA of the intake port?

[slowbird]

Originally Posted by pastry_chef

I can check that tomorrow. I'll use the flow curves posted by AG here.
http://forums.maxperformanceinc.com/...3&postcount=60

Estimated CSA of the intake port?

Min csa is around 2.55-2.60

[pastry_chef]

Tested the smaller SD330 heads, used your .465 lobe shelf cam / same specs as before.

Avg 4500 to 6500 = 592 HP

655 @ 6500
651 @ 6750
639 @ 7000

-----------------------------------------------------------------------------------

For the 330 head, I asked it what events it wanted for best power 4500 to 6500 using .465 lobes.

1.65 rockers .020 lash

108 LSA / 105 IC

Intake lobe
12604 294 267 194 .465

Exhaust lobe
12305 305 277 203 .465

Avg 4500 to 6500 = 601

656 @ 6250
660 @ 6500
652 @ 6750

[slowbird]

Interesting, thanks for your time and energy on this PastyChef. Maybe someday ill build a combo like this just to see how it does