DIY twin pumps on the quick and cheap
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
yes you could do that. it would change the $ investment considerably.
in a 00 the pumps are not 'drop in' even more so than 98's. look at the plastic tank pictures.. thats what you have. modding the tank to accept -8 and running that to the front is also not drop in and go. will require significant mods to the fuel system.
in a 00 the pumps are not 'drop in' even more so than 98's. look at the plastic tank pictures.. thats what you have. modding the tank to accept -8 and running that to the front is also not drop in and go. will require significant mods to the fuel system.
Thanks for rthe reply. I was concerned with adding other pieces to the system to make this work. I keep seeing "hobbs switch" in this thread. I wouldn't need that right? I am not running boost. I will eventually be running a 427 with a 250-300 shot. I saw a write up on the Nasty Fuel lines installation. It looked time consuming but not impossible. So, I guess what I am trying to say is could I put the pumps in run two of the harnesses and a -6 return and -8 feed and a regulator and everything work correctly. I figure my final setup should have about 720-780hp at the wheels. I would rather have plenty than not enough. I was looking at going the Aeromotive External pump route but that is $$$$$. Also, Racetronix says that these pumps function like stock pumps that is why I was saying a "simple drop in".
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
hustler- yes the great thing about the walbro is that they ARE OEM grade pumps so you can expect quiet operation and years of trouble free performance if installed correctly. A HOBBS switch is a pressure sensitive trigger. for nitrous you could use a wide open, or an rpm based trigger, or trigger the second pump to hit when the nitrous sprays. A relay is not picky what gives it the last ground or hot it needs. I personally would not run both pumps all the time, but some do and claim no negatives. This is what would be the case if you were to simply wire two Rx harnesses into the car.
Beaflag- I have never been under a 93 but i am almost positive the tank is the same, I hear the fuel line set up is different through.. but the wiring and what you do inside the tank should be identical.
Henny- On this car the fuel system mods other than injectors are totally captured in the pictorial. On my car I have a merge to -8 and a -8 bulkhead on top of the tank sender; Run -8 to one aftermarket rail, a -8 cross over, a -6 return to aftermarket regulator, then it hooks to the original factory pressure line as my return and goes back into the tank through it.
Beaflag- I have never been under a 93 but i am almost positive the tank is the same, I hear the fuel line set up is different through.. but the wiring and what you do inside the tank should be identical.
Henny- On this car the fuel system mods other than injectors are totally captured in the pictorial. On my car I have a merge to -8 and a -8 bulkhead on top of the tank sender; Run -8 to one aftermarket rail, a -8 cross over, a -6 return to aftermarket regulator, then it hooks to the original factory pressure line as my return and goes back into the tank through it.
hustler- yes the great thing about the walbro is that they ARE OEM grade pumps so you can expect quiet operation and years of trouble free performance if installed correctly. A HOBBS switch is a pressure sensitive trigger. for nitrous you could use a wide open, or an rpm based trigger, or trigger the second pump to hit when the nitrous sprays. A relay is not picky what gives it the last ground or hot it needs. I personally would not run both pumps all the time, but some do and claim no negatives. This is what would be the case if you were to simply wire two Rx harnesses into the car.
Beaflag- I have never been under a 93 but i am almost positive the tank is the same, I hear the fuel line set up is different through.. but the wiring and what you do inside the tank should be identical.
Henny- On this car the fuel system mods other than injectors are totally captured in the pictorial. On my car I have a merge to -8 and a -8 bulkhead on top of the tank sender; Run -8 to one aftermarket rail, a -8 cross over, a -6 return to aftermarket regulator, then it hooks to the original factory pressure line as my return and goes back into the tank through it.
Beaflag- I have never been under a 93 but i am almost positive the tank is the same, I hear the fuel line set up is different through.. but the wiring and what you do inside the tank should be identical.
Henny- On this car the fuel system mods other than injectors are totally captured in the pictorial. On my car I have a merge to -8 and a -8 bulkhead on top of the tank sender; Run -8 to one aftermarket rail, a -8 cross over, a -6 return to aftermarket regulator, then it hooks to the original factory pressure line as my return and goes back into the tank through it.
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TECH Enthusiast
Joined: Dec 2001
Posts: 548
Likes: 0
From: Dublin, CA
Make sure you use teflon insulated wire inside the tank. PVC insulation gets softened by gasoline.
Walbro pumps pull 10.6A each -> http://www.autoperformanceengineerin...l/fpspecs.html
Walbro pumps pull 10.6A each -> http://www.autoperformanceengineerin...l/fpspecs.html
Mightymouse, are you just adding another pump to the factory setup or does this setup have return lines and FPR upfront in the engine bay?? Might have over looked this, but not sure.. One other thing is there a part number for the relay you used??
thanks Andy
thanks Andy
Thread Starter
Joined: Nov 2001
Posts: 10,018
Likes: 51
From: Virginia
30a automotive relay, in the electircal sections of any auto parts store, if you find a 40a you could certainly use that as well
on the red car pictured i just added a second pump and hobbs trigger. my car has a front mounted regulator
on the red car pictured i just added a second pump and hobbs trigger. my car has a front mounted regulator
Thanks Andy
i have a 98 with racetronix race fuel kit on a boosted setup
is it possible to run a boost referenced FPR in front of the car in conjunction with the stock fuel regulator in the tank to up the fuel pressure to enhance the efficiency of one pump ??
if so, would i just cut the stock return line and tee it into there ?
is it possible to run a boost referenced FPR in front of the car in conjunction with the stock fuel regulator in the tank to up the fuel pressure to enhance the efficiency of one pump ??
if so, would i just cut the stock return line and tee it into there ?
Last edited by Project Dc2; Mar 7, 2008 at 10:08 AM.
