Carburating a GSL-SE
11-09-04, 01:26 AM
#1
Driving RX7's since 1979
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Carburating a GSL-SE
Question:
Since the entire fuel system for a GSL-SE is set up for high pressure fuel injection, is there anything needed to change if I want to eliminate my EFI and go carburated? I assume I'd at least need to tone down the fuel pressure from the pump.
I've remember reading about someone that was trying to retrofit EFI to a carburated 1st Gen who indicated the gas tank needs to be switch'd. Something about baffels.
Inpute, experienced thoughts, learned opinions????
Since the entire fuel system for a GSL-SE is set up for high pressure fuel injection, is there anything needed to change if I want to eliminate my EFI and go carburated? I assume I'd at least need to tone down the fuel pressure from the pump.
I've remember reading about someone that was trying to retrofit EFI to a carburated 1st Gen who indicated the gas tank needs to be switch'd. Something about baffels.
Inpute, experienced thoughts, learned opinions????
11-09-04, 01:28 AM
#2
a fuel pressure regulator is a cheap mod that'll help regulate fuel flow to the carb. a carter fuel pump (rated @ 9.5 psi i believe) wouldn't hurt either so as to take off excess pressure on the FPR
11-09-04, 02:21 AM
#6
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11-09-04, 11:23 AM
#8
Yeah, what FBII says is true.
With any aftermarket fuel pump you need an FPR to go carbed. I've got a Mallory Comp 70 6psi/70gph fuel pump and I needed to buy a Holley low pressure FPR to bring the pressure down to a managable level. The difference is that with the 6psi pump, a non-return style FPR works but with the higher pressure EFI fuel pump you *have* to have a return style one.
So since you have the lower pressure fuel pump, go out and buy a 1-4 psi FPR and regulate your fuel pressure down to about 2-3psi for any stock or modded nikki. IIRC a Holley can take higher pressures.. Dunno about Weber and Dellorto. What carb are you planning to run?
Jon
With any aftermarket fuel pump you need an FPR to go carbed. I've got a Mallory Comp 70 6psi/70gph fuel pump and I needed to buy a Holley low pressure FPR to bring the pressure down to a managable level. The difference is that with the 6psi pump, a non-return style FPR works but with the higher pressure EFI fuel pump you *have* to have a return style one.
So since you have the lower pressure fuel pump, go out and buy a 1-4 psi FPR and regulate your fuel pressure down to about 2-3psi for any stock or modded nikki. IIRC a Holley can take higher pressures.. Dunno about Weber and Dellorto. What carb are you planning to run?
Jon
11-09-04, 01:59 PM
#9
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Carburator set up planned
is to go Mikuni. I've tried Holly, Webber side draft, and Mikuni. Not as deep as what a Holly gives, but faster reacting to the throttle without the extra noise of the Webber.
11-09-04, 04:46 PM
#10
Originally Posted by HOZZMANRX7
is to go Mikuni. I've tried Holly, Webber side draft, and Mikuni. Not as deep as what a Holly gives, but faster reacting to the throttle without the extra noise of the Webber.
11-09-04, 05:40 PM
#12
Originally Posted by HOZZMANRX7
Question:
Since the entire fuel system for a GSL-SE is set up for high pressure fuel injection, is there anything needed to change if I want to eliminate my EFI and go carburated? I assume I'd at least need to tone down the fuel pressure from the pump.
I've remember reading about someone that was trying to retrofit EFI to a carburated 1st Gen who indicated the gas tank needs to be switch'd. Something about baffels.
Inpute, experienced thoughts, learned opinions????
Since the entire fuel system for a GSL-SE is set up for high pressure fuel injection, is there anything needed to change if I want to eliminate my EFI and go carburated? I assume I'd at least need to tone down the fuel pressure from the pump.
I've remember reading about someone that was trying to retrofit EFI to a carburated 1st Gen who indicated the gas tank needs to be switch'd. Something about baffels.
Inpute, experienced thoughts, learned opinions????
You can use the stock SE pump. For the regulator, use a mallory regulator OR the EL CHEAPO holley but with modified outlet to allow installation of the f/p gauge and the return line.
