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post #1 of 5 (permalink) Old 03-10-2019, 01:29 PM Thread Starter
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Head selection

Building a 4.5 stroke d1ve block stroker, looking at the afr 300 and p51 heads, which would be better? They look very close from all I have researched, just trying to get all the info I can before I pull the trigger. Engine is going in a 75 f 100 2wd, set up for 93 pump gas, aod/4r70w trans, fitech fuel injection, ac, daily driver capability with as much torque as possible, 6000 max, only thing I have for this at this point is the block at this point, would like to be able to run a 12 sec pass if it ever made it to the strip.
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post #2 of 5 (permalink) Old 03-10-2019, 03:43 PM
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Originally Posted by Steve/oh View Post
Building a 4.5 stroke d1ve block stroker, looking at the afr 300 and p51 heads, which would be better? They look very close from all I have researched, just trying to get all the info I can before I pull the trigger. Engine is going in a 75 f 100 2wd, set up for 93 pump gas, aod/4r70w trans, fitech fuel injection, ac, daily driver capability with as much torque as possible, 6000 max, only thing I have for this at this point is the block at this point, would like to be able to run a 12 sec pass if it ever made it to the strip.

To get 4600# to 12.0 you will need about 550 hp. 5000# closer to 575 hp at the crank as installed in the vehicle so build a bit extra into the combo.


You do not need the big AFR 315's. The stated goal can easily be done with the AFR 280's or 295's if you want room to grow.


11 to 1 545
AFR heads
Torker 2 intake with a jomar power cone will offer better daily driver manners than the tall AFR 4150 intake.
HFT cam of about 230 to 236 intake duration and 12 more on the exhaust.
Properly curved distributor
Good rocker arms
Good 9 key timing set.


We've done many AFR headed builds patterned after ported SCJ and P-51 builds already tested. On our somewhat conservative dyno the AFR heads best the out of the box P-51's and are easier to source. This is said with all due respect to Mr. Jon Kaase.

Hell, we do a regular fuel 521 towing engine with AFR 280's and an RPM intake that would get you there:


https://www.facebook.com/pg/PpamLLC/...29445424099806


Two clients copied this exact build with our help and in southern Cali dyno'd at 600+


Hope this helps...


SJ
used 2b RHP

Scotty J. "AKA" The "Mad Porter"
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post #3 of 5 (permalink) Old 03-10-2019, 05:53 PM
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Quote:
Originally Posted by Steve/oh View Post
Building a 4.5 stroke d1ve block stroker, looking at the afr 300 and p51 heads, which would be better? They look very close from all I have researched, just trying to get all the info I can before I pull the trigger. Engine is going in a 75 f 100 2wd, set up for 93 pump gas, aod/4r70w trans, fitech fuel injection, ac, daily driver capability with as much torque as possible, 6000 max, only thing I have for this at this point is the block at this point, would like to be able to run a 12 sec pass if it ever made it to the strip.



theres that 6000 tops rpm silliness again


hell a DOVE WILL MAKE 550,OR A D3VE with a 4.500 crank +
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post #4 of 5 (permalink) Old 03-10-2019, 08:14 PM
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theres that 6000 tops rpm silliness again


hell a DOVE WILL MAKE 550,OR A D3VE with a 4.500 crank +

Lol yuppers. The 521" towing engine did 500 @ 4K


A good 545 with AFR will easily top 800 hp @6k on pump gas.



SJ

Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
http://www.facebook.com/Ppamllc
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post #5 of 5 (permalink) Old 03-10-2019, 09:35 PM
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Lol yuppers. The 521" towing engine did 500 @ 4K


A good 545 with AFR will easily top 800 hp @6k on pump gas.



SJ
Boss 429 sure does like his RPM.....lol

MP what do you think this build could make?

598ci
sr-71 heads
mafia intake with 1 inch spacer
1050 dominator
11.5 comp pump gas
2 1/8 headers
1.8 rockers
hydralic roller huc lobes with .720 lift(solid roller lifters)
duration don't know but peak at 6200rpm like your 557 build
What ya think?

Cheers, Bob
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