stroking and injectors
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From: tucson, az
stroking and injectors
ok, got a question here. I have a 460 and if i make it a 514, that is aprox an 12 % increase in cubic inches. So if I have 24 lb injectors currently, do i go to say 26-28 lb injectors. This is speed density. or is this just not the right way to approach Speed density and stroking? Thanks--
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From: Copley, OH
stroking and injectors
The S/D system probably won't like the displacement increase. Probably nothing that can't be handled bt re-flashing the EEPROMs in the PCM. I don't know if an add-on chip would handle the differences or not.
Injectors are sized by peak HP not by engine displacement. 24# injectors are good for somewhere in the range of 305-365 HP max. The next step up is 30# units, good for 380-460 HP max. How much HP do you really expect to have?
Injectors are sized by peak HP not by engine displacement. 24# injectors are good for somewhere in the range of 305-365 HP max. The next step up is 30# units, good for 380-460 HP max. How much HP do you really expect to have?
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From: tucson, az
stroking and injectors
I'm not looking to make max HP....But max Torque is what I'm after. I use this for pulling a 5th wheel trailer....maybe upto 11000 lbs. soon--- Fuel economy is also a consideration, but i'm realistic about that. I have a few other items i'm looking at, most of consideration is a S/D cam Comp has and a custom chip.
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From: Louisville,Ky.
stroking and injectors
Economy will never be great, it takes alot of fuel to fill 514 ci. You may get by with a chip, but the mass-air will be more user friendly and will adapt to different changes.
Jimmy
Jimmy
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From: Louisville,Ky.
stroking and injectors
I believe that there is a conversion. I think some of the later 460's had mass-air, if so, all parts are available at a junkyard . You might want to try somebody like Downs Ford, That is where I got my adapter harness when I converted my Mustang to mass-air with all of the hard parts off of my buddies wrecked 89.
The chart that I used says that 650hp, 8 injectors, .75 max duty cycle of injectors and max fuel ine pressure of 75lbs = 41.25 lb injectors. A stock fuel pump ain't gonna feed 614ci. An adjustable fuel pressure regulator and a high perf. pump will definatly be required.
Jimmy
The chart that I used says that 650hp, 8 injectors, .75 max duty cycle of injectors and max fuel ine pressure of 75lbs = 41.25 lb injectors. A stock fuel pump ain't gonna feed 614ci. An adjustable fuel pressure regulator and a high perf. pump will definatly be required.
Jimmy
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From: Copley, OH
stroking and injectors
Injectors are normally rated at a pressure drop of 39 PSI. If you bump that up to 75PSI, you increase the thruput by ((75/39)**0.5) =1.387. It would only take 30# rated injectors to get 42# thruput at the increased pressure.
Bur Brucen2son madeit pretty clear he's not building a track-burner. He's looking for towing torque. For that he's not going to need anything like that sort of thruput.
Bur Brucen2son madeit pretty clear he's not building a track-burner. He's looking for towing torque. For that he's not going to need anything like that sort of thruput.
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From: Copley, OH
stroking and injectors
No. I'm telling you that injector size is a function of peak HP not of displacement. I don't know how many HP he's building for, he may need 30s or possibly 36s but the 42s are clearly overkill, especially if he cranks up the pressure. All you get by going to too large injectors is drivability problems.
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From: tucson, az
stroking and injectors
breifly what are the consequences of using an older engine 460 (carb) in place of the current efi version. I'm talking using a Speed Density friendly cam and since i would have the older heads have choice of intakes--all that would need is to adapt the intake for injectors and the top throttle body assembly. The air moving at similar rpm levels should be relative on either engine, but possibly in the higher power levels it might give the computer a problem? Thoughts on this?
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