Stroker Time!!!!
Fleet Owner
Joined: Oct 2005
Posts: 20,782
Likes: 1,747
From: Kentucky
While there is truth in less pressure equals more volume there is only a certain amount the stock fuel pump will supply. At 39 PSI the pump is rated at ~105 lph. At 55 PSI (300 I6) the pump is rated for 90 lph. I seem to recall the maximum flow rate of the stock Ford truck fuel pump is ~125 lph. Far below the requirements of the OP's desired HP level.
Laughing Gas
Joined: Aug 2002
Posts: 1,069
Likes: 19
From: Central Wisconsin
Forget the off the shelf cams… call Jones Cams, Bullet/Ultradyne or Camcraft cams. They will grind a cam for your particular needs. Remember you need enough torque to get a heavy truck off the line… cams made for Mustangs and lighter cars simply will not work the best for your application. most guys see those higher lifts and longer durations as the secret… maybe but not for everybody.
Fleet Owner
Joined: Oct 2005
Posts: 20,782
Likes: 1,747
From: Kentucky
I ran across this from another thread: HFP 255LPH Fuel Pump Assembly *Rear Tank* Ford F150 1990 - 1996
255 lph......that should fit the project scope.
255 lph......that should fit the project scope.
Posting Guru
Joined: Mar 2013
Posts: 1,726
Likes: 3
I ran across this from another thread: HFP 255LPH Fuel Pump Assembly *Rear Tank* Ford F150 1990 - 1996
255 lph......that should fit the project scope.
255 lph......that should fit the project scope.
Fleet Owner
Joined: Oct 2005
Posts: 20,782
Likes: 1,747
From: Kentucky
A blower makes any engine a "Superman".
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Freshman User
Joined: Jun 2007
Posts: 43
Likes: 0
Sounds like a fun build. One thing I noticed on the cylinder heads you mentioned, was 58 cc chambers and pistons with 5 cc dish. On a 408, that combo will have over 12 to 1 compression, not pump gas friendly. I don't know what C/R you're shooting for, but just thought I'd mention it. Looking forward to your project 
New User
Joined: Feb 2015
Posts: 4
Likes: 0
when i converted my truck to 5.8 Cleveland and Holley the standard fuel pump was too much for the needle on the carb would just push past an flood.
these pumps are set up to return fuel to the tank where as carby is not. i run a Holley blue fuel pump on mine and an inline regulator
these pumps are set up to return fuel to the tank where as carby is not. i run a Holley blue fuel pump on mine and an inline regulator
Posting Guru
Joined: Mar 2013
Posts: 1,726
Likes: 3
when i converted my truck to 5.8 Cleveland and Holley the standard fuel pump was too much for the needle on the carb would just push past an flood.
these pumps are set up to return fuel to the tank where as carby is not. i run a Holley blue fuel pump on mine and an inline regulator
these pumps are set up to return fuel to the tank where as carby is not. i run a Holley blue fuel pump on mine and an inline regulator
Plenty of carbs are set up for return...
Senior User
Joined: Dec 2014
Posts: 298
Likes: 0
As far as a fuel pump I could build a 700 hp per tank fuel setup where only one pump runs all the time external pump runs off of a window switch set to a certain voltage usually between 3.25 and 3.75 to 5 volts using your tps as the sensor to drive the voltage switch.
Freshman User
Joined: May 2015
Posts: 37
Likes: 0
500hp at the flywheel with a 408 is CAKE on pump gas. For example, the 8.2 deck 369ci engine in my Mustang made 506rwhp/453rwtq on straight 91 octane pump gas, naturally aspirated. That's about 575hp at the flywheel. There's nothing exotic about it either, it's just a well thought out combo. 10.1 compression, ported Twisted Wedge heads, fairly small solid roller, TFS Box-R intake manifold, 105mm throttle body, and a 117mm MAF.
Here's a video compilation my buddy made of my car with the engine I described above.
The dookie bomb:
You don't want a dual plane intake manifold.
Put a set of AFR 205's on it.
Have a custom hydraulic roller camshaft ground for it, and be VERY specific with your cam guy about your goals and requirements of what you ultimately want the engine to do.
Here's a video compilation my buddy made of my car with the engine I described above.
The dookie bomb:
You don't want a dual plane intake manifold.
Put a set of AFR 205's on it.
Have a custom hydraulic roller camshaft ground for it, and be VERY specific with your cam guy about your goals and requirements of what you ultimately want the engine to do.
Lead Driver
Joined: May 2011
Posts: 5,769
Likes: 441
Yea it's pretty simple, however I wouldn't want your engine in a truck. Your setup is proof of how it's possible though, with some changes in cam selection and maybe head volume, your 500/450 combo would be down to 430/450 ish hp/tq at the wheels. 500 crank hp with a power band that starts lower for a better suited truck app...Ez build.