Dual fuel pumps?
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Dual fuel pumps?
Im sitting here, contemplating spending the 160 bucks on the external walbro... when I come across this Vortech T-Rex 190lph pump I have...
So Im thinking.. I've heard of running pumps in parallel before.... Now how do I do it.
Please someone help me out. Here's how I think it can go.
Tee off the feel line from the tank, into both pumps, then T the output from both pumps back into the original line. How's that sound?
Now what about powering both pumps? Can I use the same power/ground for each? Or must I run them both seperatly to the battery, or a switch as it might be? Right now the stock pump is still going by the relay. Should I run the 2ndary pump to a switch as to only run it when I need it?
Suggestions?
So Im thinking.. I've heard of running pumps in parallel before.... Now how do I do it.
Please someone help me out. Here's how I think it can go.
Tee off the feel line from the tank, into both pumps, then T the output from both pumps back into the original line. How's that sound?
Now what about powering both pumps? Can I use the same power/ground for each? Or must I run them both seperatly to the battery, or a switch as it might be? Right now the stock pump is still going by the relay. Should I run the 2ndary pump to a switch as to only run it when I need it?
Suggestions?
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I would use dedicated power and ground circuits since those pumps draw quite a bit of current. For many cars, they pick up substantial fuel flow running a dedicated wire to the factory pump, you can only imagine 2 race pumps.
As far as plumbing, yes, T-off from the fuel tank into 2 pumps. You can either T them back together, but a better solution is to modify the fuel rail so one pump feeds each end of the fuel rail. Especially on an inline 6 rail, this will allow equal distribution to all injectors and give you max potential.
The 5.0 guys do something similar to this, they eliminate the crossover between the 2 rails and use one pump for each rail.
As far as plumbing, yes, T-off from the fuel tank into 2 pumps. You can either T them back together, but a better solution is to modify the fuel rail so one pump feeds each end of the fuel rail. Especially on an inline 6 rail, this will allow equal distribution to all injectors and give you max potential.
The 5.0 guys do something similar to this, they eliminate the crossover between the 2 rails and use one pump for each rail.
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I can't do that, because it's a speghetti rail. Difficult to explain, but it's ghetto. So do you think running a switch to the 2ndary pump would be a good idea then?
The only other possible problem im worried about is the FPR blowing open.
My friend's DSM is doing it with a single 255 walbro... 2x190lph could be lots worse.
The only other possible problem im worried about is the FPR blowing open.
My friend's DSM is doing it with a single 255 walbro... 2x190lph could be lots worse.
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A T-rex pump is used in line. The in tank pump is still there, and it basically feeds the T-rex. Having two pumps running seperate being fed by the same stock pick up and then forcing fuel into the same stock line doesn't sound like something that is going to work to me.
Edit: Definitely make sure you have good power though, you can get a race pump to flow less than stock with a cobbed up wiring job
Edit: Definitely make sure you have good power though, you can get a race pump to flow less than stock with a cobbed up wiring job
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Just to make sure we're on the same page here, you want to run the pumps parralel right? So you're going to use the stock pump (which is external of the tank anyway right) and the T-rex seperately?
Bill is referring to series, which won't do much but raise your base pressure quite high.
I've seen guys using the stock pump under normal conditions, and have a boost switch or something to turn the second pump on with its own fuel line (so when the TRex kicks in, its adding fuel to the same line as the factory pump), but you aren't going to get max benefits from it since youre still using one pickup and one fuel rail.
Bill is referring to series, which won't do much but raise your base pressure quite high.
I've seen guys using the stock pump under normal conditions, and have a boost switch or something to turn the second pump on with its own fuel line (so when the TRex kicks in, its adding fuel to the same line as the factory pump), but you aren't going to get max benefits from it since youre still using one pickup and one fuel rail.
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The only way I would see something like that being effective is if you had a separate pickup for the second pump. It would seem to me that a stock pickup wouldn't flow enough to feed both pumps.
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My 930 has two pumps but they are in series. With a fuel loop system as long as the return line can handle the volume you will be ok.
These pumps only move a certain volume of fuel and putting them in series won't change that and the pressure is controlled by the regulator restriction.
The thing I like the most about having two pumps is my car runs fine with just one. Since all my mechanical injection needs is pressure to operate it makes the system very dependable.
These pumps only move a certain volume of fuel and putting them in series won't change that and the pressure is controlled by the regulator restriction.
The thing I like the most about having two pumps is my car runs fine with just one. Since all my mechanical injection needs is pressure to operate it makes the system very dependable.
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The main reason Im putting the other pump on there, is the 2ndary injectors run off the high pressure side, before the regulator. With the 450 and 1200cc injectors, it robs the pressure from my stock injectors, and causes a lean condition when I run over 18psi.
