Author
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Topic: going from efi to carb and need some wiring help
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89'LXNOTCH
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Member # 8810
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posted
I am changing over from EFI to carb and was wondering who has a diagram of the wiring that needs to be done or if there is a website with instructions on how to do it. Going to use a MSD 6-al box and blaster ss coil. I know the computer and main wiring harness needs to be removed but im stuck there. thanx guys!
Posts: 313 | From: Oakland | Registered: Dec 2008
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true11
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Member # 9262
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posted
to make it run just wire up the msd with the right dist an msd dist would be the easy way and use the right fuel pump .you can use the stock fuel pump if you put a return style reg from aeromotive.
Posts: 62 | Registered: Jun 2009
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BIGBALLFACTOR
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Member # 7277
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posted
do not use a the stock efi fuel pump the pressure an volume from a stock pump will over flow the bowls of a carb get a holley blue,or black pump an reg it will work like it should
Posts: 6908 | From: okc | Registered: Dec 2006
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true11
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Member # 9262
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posted
no it wont if you use the right return style reg us fast guys run 30 lbs of fuel press at the pump
Posts: 62 | Registered: Jun 2009
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BIGBALLFACTOR
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Member # 7277
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posted
quote: Originally posted by true11: no it wont if you use the right return style reg us fast guys run 30 lbs of fuel press at the pump
yeah something tells me this guy is not run a 1200 hp car right now
Posts: 6908 | From: okc | Registered: Dec 2006
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true11
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Member # 9262
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posted
what does that have to do with a stock low horse power pump .it can be done whith an aeromotive by pass reg and will only have low press at the carb .i have done it many times when conv fom efi to carb. aeromtive #13301
Posts: 62 | Registered: Jun 2009
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BIGBALLFACTOR
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Member # 7277
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posted
quote: Originally posted by true11: what does that have to do with a stock low horse power pump .it can be done whith an aeromotive by pass reg and will only have low press at the carb .i have done it many times when conv fom efi to carb. aeromtive #13301
gee aeromtive pump is not a stock up is it
Posts: 6908 | From: okc | Registered: Dec 2006
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true11
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Member # 9262
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posted
why would you need a aeromtive pump to work it will just dump any extra fuel back to the tank ?
Posts: 62 | Registered: Jun 2009
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wilit
Mustang Messiah
Member # 3367
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posted
quote: Originally posted by fasthatch: quote: Originally posted by true11: what does that have to do with a stock low horse power pump .it can be done whith an aeromotive by pass reg and will only have low press at the carb .i have done it many times when conv fom efi to carb. aeromtive #13301
gee aeromtive pump is not a stock up is it
That part number he quoted is for a Aeromotive regulator, not pump. The regulator is adjustable from 3psi to 65psi so you can use it either for a carb or EFI. With the stock pump and that regulator, you can easily run a carb.
-------------------- "If a man hasn't found something worth dying for, he isn't fit to live." - Martin Luther King Jr.
Posts: 4793 | From: 37.78514° North 122.40100° West | Registered: Oct 2003
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89'LXNOTCH
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Member # 8810
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posted
Thanx guys but i have the whole fuel system already handled. I have a holley blue pump and 3/8 fuel line and im going to get the mallory fuel tank insert with return line to deal with the in line pump since i had the 255 pump already. Just needed to know about the wiring for the dash to keep the gauges working still and the wiring for starter, alternator, oil sending unit and ignition. Looked on Google and the jason fletcher site is down for the wiring diagram. Thanx again
Posts: 313 | From: Oakland | Registered: Dec 2008
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