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Current NHRA Pro-Stock Cyl. heads

https://www.speed-talk.com/forum/viewtopic.php?t=60071

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Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 6:51 am
by swampbuggy
Does anybody know pretty close as to what the flow numbers are on the current Pro-Stock heads ? Mark H.

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 7:01 am
by mag2555
Your talking 500 cfm on the Intake and 330 out the Exh @ .900" lift pretty much.

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 8:34 am
by mt-engines
mag2555 wrote: ↑Tue Feb 11, 2020 7:01 am Your talking 500 cfm on the Intake and 330 out the Exh @ .900" lift pretty much.
LMFAO.... not even close to that little.

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 12:15 pm
by LSP
mt-engines wrote: ↑Tue Feb 11, 2020 8:34 am
mag2555 wrote: ↑Tue Feb 11, 2020 7:01 am Your talking 500 cfm on the Intake and 330 out the Exh @ .900" lift pretty much.
LMFAO.... not even close to that little.
It was that little 25 years ago lol

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 1:50 pm
by maxracesoftware
swampbuggy wrote: ↑Tue Feb 11, 2020 6:51 am Does anybody know pretty close as to what the flow numbers are on the current Pro-Stock heads ? Mark H.
from PipeMax v4.50 :

Code: Select all

Bore=4.75000   Stroke=3.52000   499.01057710 Cubic Inches @ 10000 RPM  Intake System= 124.66269 VE%
Complete Intake System Flow     @28in.= 600.0000 -to- 642.5146 CFM @ 1.200000 Lift (0.00000 VE% Loss)
Cylinder Head  Intake Port Flow @28in.= 600.0000 -to- 642.5146 CFM @ 1.200000 Lift (124.66269 VE%)
Cylinder Head Exhaust Port Flow @28in.= 380.0000 -to- 406.9259 CFM @ 1.100000 Lift (no Flow Pipe)

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 2:21 pm
by Stan Weiss
I have no idea what todayes heads flow. These are from some time ago. They were not just ported by Darin but are the heads he designed for Ford.

Ford Pro Stock RCV (Canted Valve) Ported Darin Morgan SF600 Alum
Exhaust = No Pipe
2.575
0.20000 - 175
0.30000 - 273
0.40000 - 369
0.50000 - 457
0.60000 - 530
0.70000 - 583
0.80000 - 614
0.90000 - 637
1.00000 - 644
1.865
0.20000 - 103
0.30000 - 154
0.40000 - 200
0.50000 - 243
0.60000 - 286
0.70000 - 327
0.80000 - 344
0.90000 - 351
1.00000 - 360

Stan

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Tue Feb 11, 2020 7:15 pm
by swampbuggy
Thanks to Larry and Stan for your input. I listened to an audio interview somebody did with Mr. Godbold at Comp. Cams which prompted me to run some math calculations. One was....appx. 1500 H.P. divided by 644 C.F.M. = 2.33 H.P. per CFM . He also mentioned a percentage of the diameter of your intake valve would equate to the needed valve lift. Examples used were appx. 40 percent for NASCAR....appx. a 2.230" x .40 = .892" lift. Pro-Stock close to 50 percent. 2.57" x .50 = 1.285" lift ?????? Mark H. BTW the NASCAR I.V. size was a guess, the 40 percent was Billy's words.

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Wed Feb 12, 2020 1:20 am
by JohnsnsFord2@aol.com
Stan Weiss wrote: ↑Tue Feb 11, 2020 2:21 pm I have no idea what todayes heads flow. These are from some time ago. They were not just ported by Darin but are the heads he designed for Ford.

Ford Pro Stock RCV (Canted Valve) Ported Darin Morgan SF600 Alum
Exhaust = No Pipe
2.575
0.20000 - 175
0.30000 - 273
0.40000 - 369
0.50000 - 457
0.60000 - 530
0.70000 - 583
0.80000 - 614
0.90000 - 637
1.00000 - 644
1.865
0.20000 - 103
0.30000 - 154
0.40000 - 200
0.50000 - 243
0.60000 - 286
0.70000 - 327
0.80000 - 344
0.90000 - 351
1.00000 - 360

Stan

were those the heads Larry Morgan ran before he gave up on Ford....also the same style CW runs?
Darin designed 2 styles ??

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Thu Feb 13, 2020 11:12 am
by Stan Weiss
JohnsnsFord2@aol.com wrote: ↑Wed Feb 12, 2020 1:20 am
Stan Weiss wrote: ↑Tue Feb 11, 2020 2:21 pm I have no idea what todayes heads flow. These are from some time ago. They were not just ported by Darin but are the heads he designed for Ford.

Ford Pro Stock RCV (Canted Valve) Ported Darin Morgan SF600 Alum
Exhaust = No Pipe
2.575
0.20000 - 175
0.30000 - 273
0.40000 - 369
0.50000 - 457
0.60000 - 530
0.70000 - 583
0.80000 - 614
0.90000 - 637
1.00000 - 644
1.865
0.20000 - 103
0.30000 - 154
0.40000 - 200
0.50000 - 243
0.60000 - 286
0.70000 - 327
0.80000 - 344
0.90000 - 351
1.00000 - 360

Stan

were those the heads Larry Morgan ran before he gave up on Ford....also the same style CW runs?
Darin designed 2 styles ??
From what I can remember there were 2 heads designed. Darin designed 1 of them and for some reason the other head was the one used.

Stan

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Fri Feb 14, 2020 12:39 am
by SchmidtMotorWorks
Stan Weiss wrote: ↑Thu Feb 13, 2020 11:12 am
JohnsnsFord2@aol.com wrote: ↑Wed Feb 12, 2020 1:20 am
Stan Weiss wrote: ↑Tue Feb 11, 2020 2:21 pm I have no idea what todayes heads flow. These are from some time ago. They were not just ported by Darin but are the heads he designed for Ford.

Ford Pro Stock RCV (Canted Valve) Ported Darin Morgan SF600 Alum
Exhaust = No Pipe
2.575
0.20000 - 175
0.30000 - 273
0.40000 - 369
0.50000 - 457
0.60000 - 530
0.70000 - 583
0.80000 - 614
0.90000 - 637
1.00000 - 644
1.865
0.20000 - 103
0.30000 - 154
0.40000 - 200
0.50000 - 243
0.60000 - 286
0.70000 - 327
0.80000 - 344
0.90000 - 351
1.00000 - 360

Stan

were those the heads Larry Morgan ran before he gave up on Ford....also the same style CW runs?
Darin designed 2 styles ??
From what I can remember there were 2 heads designed. Darin designed 1 of them and for some reason the other head was the one used.

Stan
The head didn't determine the flow, there was enough stock to cut about any shape you wanted into it.
It was basically a blank canvas as most heads of that class are.
The one dimension that had a little gravity is the intake valve axis to cylinder bore axis was about 9 degrees as designed.
Could have been made a couple degrees up or down from there.

Re: Current NHRA Pro-Stock Cyl. heads

Posted: Fri Feb 14, 2020 2:00 am
by JohnsnsFord2@aol.com
Stan Weiss wrote: ↑Thu Feb 13, 2020 11:12 am
JohnsnsFord2@aol.com wrote: ↑Wed Feb 12, 2020 1:20 am
Stan Weiss wrote: ↑Tue Feb 11, 2020 2:21 pm I have no idea what todayes heads flow. These are from some time ago. They were not just ported by Darin but are the heads he designed for Ford.

Ford Pro Stock RCV (Canted Valve) Ported Darin Morgan SF600 Alum
Exhaust = No Pipe
2.575
0.20000 - 175
0.30000 - 273
0.40000 - 369
0.50000 - 457
0.60000 - 530
0.70000 - 583
0.80000 - 614
0.90000 - 637
1.00000 - 644
1.865
0.20000 - 103
0.30000 - 154
0.40000 - 200
0.50000 - 243
0.60000 - 286
0.70000 - 327
0.80000 - 344
0.90000 - 351
1.00000 - 360

Stan

were those the heads Larry Morgan ran before he gave up on Ford....also the same style CW runs?
Darin designed 2 styles ??
From what I can remember there were 2 heads designed. Darin designed 1 of them and for some reason the other head was the one used.

Stan

the other head wasn't approved by nhra!?? I thought I heard that...
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