P-51 Flow Numbers? - Page 2 - 460 Ford Forum
Jon Kaase Racing Engines Jon Kaase is considered one of the best minds in the world of Big Block Fords and has created many parts to help enthusiasts with their 460 based projects. Gentlemen start your questions…
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post #16 of 32 (permalink) Old 11-27-2011, 07:32 PM
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p-51

wanting to build a 521 also with the p-51s was thing of the some cam jon used in the 460 he did for the engine challenge(will the same top half but with a 521 with a flat top piston im thinging 12:1 compression what do u guys thing as far as horse power #'s
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post #17 of 32 (permalink) Old 12-02-2011, 09:52 PM
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426 cfm at .600 lift 430 cfm at .840 some ports were higher than that.

Hp and torque numbers in my sig.



Blake

580 inch Ported P-51's
1003 hp @7200 810 tq @ 6100
86 Notch
29.5x13.5 Ladder Bar
1.200 60ft 5.41 @ 127.78 mph 8.51 @ 156 mph
200 shot 5.23 135 mph 1.13 60 ft.
5.23 135 mph on a 200 shot 1.13 on the rear tire.
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post #18 of 32 (permalink) Old 12-03-2011, 10:26 AM
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Hi Blake,

What valve set angles are you using on those heads?

Thanks, Steve
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post #19 of 32 (permalink) Old 12-03-2011, 09:08 PM
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Quote:
Originally Posted by 68xr7cat View Post
Hi Blake,

What valve set angles are you using on those heads?

Thanks, Steve

Not Blake, but just plain 'ol 45* seats.

Charlie Evans
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post #20 of 32 (permalink) Old 12-04-2011, 08:58 AM
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Quote:
Originally Posted by henry b. View Post
Magazine numbers

Cylinder Head
Flow Comparison
Super Cobra Jet vs. Kaase P51
Valve Lift: Super Cobra Jet: Kaase P51:
INTAKE: EXHAUST: INTAKE: EXHAUST:
.100 70 52 72 52
.200 154 103 152 107
.300 202 139 234 151
.400 248 185 306 183
.500 274 200 350 202
.600 298 208 368 215
.700 309 212 388 229
.800 318 214 395 239

Jon Kasse web site numbers

Flow Chart as Delivered @ 28" Superflow 600
P51
Intake .100 105
.200 175
.300 258
.400 330
.500 375
.600 395
.700 401


Exhaust .100 103
.200 137
.300 170
.400 199
.500 223
.600 242
.700 251
magazine # are just that depending which mag ya pick up the numbers are all over the place, for the scj's summits ad says 330-225 then jons site says 345-225 then on his same site the p51 vs. scj add says the scj flows 318-214 so i guess the flow is whatever writeup ya want to believe in.

84 hatch scj headed 472" on 10" tires
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post #21 of 32 (permalink) Old 12-04-2011, 04:27 PM
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Quote:
Originally Posted by c.evans View Post
Not Blake, but just plain 'ol 45* seats.
My intakes are on a 50* degree seat.....................

Blake

580 inch Ported P-51's
1003 hp @7200 810 tq @ 6100
86 Notch
29.5x13.5 Ladder Bar
1.200 60ft 5.41 @ 127.78 mph 8.51 @ 156 mph
200 shot 5.23 135 mph 1.13 60 ft.
5.23 135 mph on a 200 shot 1.13 on the rear tire.
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post #22 of 32 (permalink) Old 12-04-2011, 05:04 PM
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Quote:
Originally Posted by henry b. View Post
FWIW, I took both sets of numbers from Jon's web site, sorry you have a problem with them lol.

http://www.jonkaaseracingengines.com...der-heads.html
FWIW Don't get ur pantys in a wad Henry i was also stating a fact just as you were, and i don't have a problem with any of the ads about any type of heads, it can be misleading to some people thats all. Myself i love the scj's on my 472'' i think their awesome as well as the jegs/kaase castings on my small block.

84 hatch scj headed 472" on 10" tires
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post #23 of 32 (permalink) Old 12-05-2011, 06:56 AM
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Wow Henry its hard for you to read between the lines i guess, my reply went right over your head as too my point.

84 hatch scj headed 472" on 10" tires
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post #24 of 32 (permalink) Old 01-14-2012, 05:25 PM
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my freinds new build with P51s on a 545 all scat motor made 891@6800
764lb at 460 victor intake and 1150 dom all unported
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post #25 of 32 (permalink) Old 01-27-2012, 10:19 PM
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went 4.80s in a 3200 ss mustang without bars with p51s on radials
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post #26 of 32 (permalink) Old 02-01-2012, 09:35 PM
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Flow numbers

My p51s only flow 389@28, but my car gos 9.05@149 with me 3275lb hauls the wood. Raced my buddy with my horse trailer full whipped him. He complained I had 4 more horse.
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post #27 of 32 (permalink) Old 02-11-2012, 07:40 PM
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That is some BBF candy there. I can't wait until the next freshening to step up to these heads.

Carver Speed
93 Mustang Notch 25.3 514
73 F100 429
76 Highboy 472
65 Futura 347, F1r
31 Model A P/U S/Rod
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post #28 of 32 (permalink) Old 02-20-2012, 07:57 PM Thread Starter
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Ok, so it's been a long time with my P-51s coming. I got 436 out of mine finally, and that looks like to me that would be the Max that can be done. Took the time to raise the exhaust ports and yes they do have T&D shafts on them, has taller valves and different angles. The cam is in the 850's and will be on fogger. if the ol' 521 don't see 900, I'll be dissapointed. I will post the dyno sheet for you guys. Thanks for the help!
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post #29 of 32 (permalink) Old 02-20-2012, 08:02 PM Thread Starter
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By 900, I mean without the NOS on the dyno. Got a CFM carb coming for it.
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post #30 of 32 (permalink) Old 04-12-2012, 09:48 PM Thread Starter
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going to the dyno saturday
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