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fuelling a whipple 5.3

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Old Mar 5, 2012 | 11:49 PM
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Default fuelling a whipple 5.3

i am running a 10lb pulley on a side mount whipple, 44lb delphi injectors. what kind of fuel pump should i be getting. i also would like to know if those 44lb injectors will be capable of supporting that power with e85. if so i will need a fuel pump that will supply enough for e85. if the injectors will not flow enough for e85 then i wont upgrade ill just stay 91 octane.
my mods are in sig.
also there is a blow off mounted to the bottom of the supercharger that was used with the supercharger electronics that have been deleted. can i run a boost controller to this to control the boost?
also what do i need to do to pin the crankshaft?
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Old Mar 6, 2012 | 12:47 AM
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Those injectors should be okay for your 5.3 at 10 psi with the 91 octane. But they'll be nearly maxxed out. They definately won't be enough to run E85. What have you decided to do for your fuel pump?

That valve is a bypass valve, and does not need the Whipple-crapfantastic-tronics to operate. You need a manifold vacuum source to open the valve at idle, and that will also keep the valve open for bypass while you're driving in vacuum. When you mash the pedal and manifold vacuum goes to zero, the valve will close, and your Whipple will go into boost. That's all it takes.

You'll need a crank pinning kit, and there's a sticky in the Forced Induction section called "Finally pinned my crank". Or something like that. I have a crank pinning kit for sale in the classifieds(with instructions) that would work perfectly for you.
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Old Mar 6, 2012 | 12:17 PM
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Thanks for the info, are those injectors 44lbs at 45 psi or 60psi?
I still havnt figured out what to do about a pump tho, any ideas?
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Old Mar 6, 2012 | 01:13 PM
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I've got a KB kit I just put on and it has the bypass valve as well. I have it running to a barb on the blower that's after the roots...is this correct? Also there's a barb on the back of the throttle body elbow and another on the back side of the blower, where do these go? Right now I just have them connected to one another
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Old Mar 7, 2012 | 08:12 PM
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What should I do about fuel pump?
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