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Location:
SE. Melbourne
Registered:
August 2002
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Fuel Pump for 4AC!?
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Thu, 19 September 2002 02:11
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Hey all,
I was wondering if there is any point or way to hook up a fuel pump for my ol 4ac..
hmm I guess it must have one somewhere to get the fuel from the tank to the carbie right?.. hmm what about a higher preasure one?.. I have little understanding about my engine, so I am just bouncing ideas around..
Thanks
-Shaun.
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Location:
Adelaide
Registered:
May 2002
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Re: Fuel Pump for 4AC!?
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Thu, 19 September 2002 06:09
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The fuel pump on a 4A-C can be found on the pasanger side at the rear of the head (in a FWD). This is a mechanical diaphram pump. A lobe on the cam shaft actuates a leaver that moves the diaphram, and pumps fuel.
It will have 3 hoses on it, one from the fuel tank, one return to the fuel tank, and one to the carbie.
Note also, that the black plastic bolted between the pump and the head isn't just a heat shield, but also a spacer.
Just buy changing to a high(er) preausre pump you wont gain anything. The releif valve will still need to be set to the same as in the standard pump if you are running that standard carbie. Moving to an electric fuel pump would give little advantage as far as i can see, as you would then need to add a seperate presure regulator some where in the system, and replumb the fuel lines to suit.
If you can, grab a copy of the Gregorys or Max Ellery books about the AE82 Corolla. They cover a good bit about the 4A-C, and would give you the base knoledge to plan mods from.
Also, have a search through the forums. I know the 4A-C has been talked about a lot before.
Hope that helps!
Craig.
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Location:
SE. Melbourne
Registered:
August 2002
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Re: Fuel Pump for 4AC!?
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Thu, 19 September 2002 06:19
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Thanks buddy, Exactly what I needed to hear.. 
Mine is actually in RWD, but I believe I know what the thing looks like..
-Shaun.
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Fuel Pump for 4AC!?
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Fri, 20 September 2002 23:11
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You could use a low pressure electric and bypass the mechanical alltogether ( leave it in there though or you will have a small oil leak) and it should work fine...maybe use a pressure regulator as well
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