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SCJ used to be the best "bang for the buck"..........................but AFR heads have that title now...!!

Word is Kaase is working on some new heads, what.....i don't know.

Cheers, Bob
 

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How do TFS heads rate in the AFR vs. P-51's debate? I thought trick flow's were the hot ticket?

Mike (rookie 1st time 460 project owner - trying to sponge in BBF info)
 

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How do TFS heads rate in the AFR vs. P-51's debate? I thought trick flow's were the hot ticket?

Mike (rookie 1st time 460 project owner - trying to sponge in BBF info)

Feel free to draw your own conclusions.



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Earlier this year I built a big Ford with a new set of P-51's for a customer who mud races and that engine made 918 horsepower and just a little over 800lbs/ft torque. What would it have done with a set of AFR heads?
 

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Earlier this year I built a big Ford with a new set of P-51's for a customer who mud races and that engine made 918 horsepower and just a little over 800lbs/ft torque. What would it have done with a set of AFR heads?
Oakley and Lem have made 1013 at 598" sub 7K if I remember right.

Depends on the specs Dave.


S
 

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Wow that's impressive for AFR! Thanks for the info!

I wonder if the Trick Flow A460 360 heads with BBC oval exhaust ports would have done any better? Either way, AFR looks to be the best bang for the buck.

Mike

The new A and C heads are kind of in their own league.

Myself I compare the AFR stuff with current street style heads.



S
 

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Wow that's impressive for AFR! Thanks for the info!

I wonder if the Trick Flow A460 360 heads with BBC oval exhaust ports would have done any better? Either way, AFR looks to be the best bang for the buck.

Mike
A460 heads really shouldn't be compared to AFR, SCJ, etc. Can't use factory style intakes or headers/manifolds, and they'll likely be down significantly on torque at lower rpms. They're a great race head, but not so much for a street car.


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Hi, I have a 521 bbf crate engine, all original with a powerglide in a 84 ford Thunderbird and Im running low 10´s and I want to get lower, around 9.70
I am going to send the engine for a refresh, it has around 200 runs, and they recommend me to change crank, rods and pistons, and maybe even cam and intake to make it a 557 but I think that it would be too expensive.
So I wanted to ask you if you think that it would be enough with a blueprint, porting heads and intake and maybe changing the cam? And do you think it would just as expensive as the first option or a lot cheaper?
The low budget big gains would be just back cut the intake valves and replace the cam. At 200 passes I don't see the valve guides being in trouble.

Next move would be to put flat top pistons in if you are going to run good gas.

You can make a load more power before you would have to port or replace the heads.
 

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thank you for your comments, here are more details of the engine:
-HP (SAE J607) 609 hp @ 5750 rpm
-Torque (SAE J607) 630 lb-ft of torque @ 4500 rpm
-HP (SAE 1349 Corrected) 580 hp @ 5750 rpm
-Torque (SAE 1349 Corrected) 600 lb-ft of torque @ 4500 rpm
-10.0:1 compression ratio Cast nodular iron crankshaft, M-6303-A514Victor single plane intake manifold M-9424-H429
-Ford Racing "Super Cobra Jet" aluminum cylinder heads. They flow significantly more than production 460 heads. Combustion chamber volume is 72cc (nominal)
-Ford Racing "Super Cobra Jet" valve train includes dual-valve springs, retainers, keepers, seals and premium stainless steel swirl polished valves. Intake valve diameter is 2.20" and exhaust valve diameter is 1.76"
-Ford Racing high-performance solid roller mechanical camshaft M-6250-A514 provides significant horsepower increases above 3500 RPM and good low-end torque. Valve lift is .640" intake and exhaust. Duration at .050" is 254 degrees intake and 258 degrees exhaust
-Ford Racing forged aluminum dished pistons, bore size 4.390"
That cam aint on the same planet with cams that would be good for a drag race engine.
 

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No vacuum pump but the engine ended up with a really nice .043 ring package due to limited availability for the 4.450 bore size for whatever reason. I think that helped a lot.
Add about another 20 hp for a pump. You do but, most people don't consider how big a deal ring package and other stuff is to making HP. The .9mm/.9mm/2mm stuff really makes things happen.
 

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Hi, I have a 521 bbf crate engine, all original with a powerglide in a 84 ford Thunderbird and Im running low 10´s and I want to get lower, around 9.70
I am going to send the engine for a refresh, it has around 200 runs, and they recommend me to change crank, rods and pistons, and maybe even cam and intake to make it a 557 but I think that it would be too expensive.
So I wanted to ask you if you think that it would be enough with a blueprint, porting heads and intake and maybe changing the cam? And do you think it would just as expensive as the first option or a lot cheaper?
There are many paths that can get you there, such as driveline setup change + vehicle weight reduction + a cam change, for example. You don’t necessarily need a big new engine, and in fact a big new engine might subsequently dictate the aforementioned other changes anyway.

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The out of the box AFR castings are going to best P-51's....Unless a client demands it All aluminum headed BBF engines that come out of BOTH of our shops have AFR heads.

S
One size does not fit all. :) I know that both you and Carl know this, I just don’t want your above point to misconstrue others to believe there is only one fantastic head that stands above them all regardless of application. There are many options from which to choose. And AFR heads are not the only way for the OP to gain 3 tenths.

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Well this is depressing. I have a brand new set of SCJ's sitting on the block and I'm already behind.......
You’re not “behind” anything, there is no such thing as a “best” head, and your engine combination is going to make your car a rocket ship, Mike. :cool:

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I wonder if the Trick Flow A460 360 heads with BBC oval exhaust ports would have done any better?
I just want to note that there isn’t a BBF head on the market that uses “BBC oval exhaust ports.” This is not a matter of semantics, it’s a fact. (The pattern for the header flange is BBC, however the port is not.)
 
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