dual fuel pumps, stcok fpr
09-18-05, 11:45 PM
#2
Passing life by
Wasted effort. Why on earth would you run a setup that needs dual pumps with a factory FPR? The factory FPR was designed just for that factory setup.
More pumps = more volume not necessarily PSI
More pumps = more volume not necessarily PSI
09-18-05, 11:55 PM
#4
Passing life by
The answer is in my response! READ IT!
I do not think you are routing your fuel system properly anyhow with 2 pumps to possible even consider the functionality of the stock FPR and PD setup.
I do not think you are routing your fuel system properly anyhow with 2 pumps to possible even consider the functionality of the stock FPR and PD setup.
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09-19-05, 12:51 AM
#9
I'm a boost creep...
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The answer to your question is it depends. Pumps in parallel, maybe; pumps in series, no way. BUT...
Dual pumps is a waste of time in 99% of cases. There are drop-in pumps that can provide 450-500hp worth of fuel without any mucking around with trying to connect two pumps together. Do you need more than that?
Dual pumps is a waste of time in 99% of cases. There are drop-in pumps that can provide 450-500hp worth of fuel without any mucking around with trying to connect two pumps together. Do you need more than that?
09-19-05, 05:09 AM
#11
Lives on the Forum
The dual stock FC turbo fuel pumps are going to "overrun" the stock FPR.
In my estimation, you're probably going to run about 10psi to 15psi higher that spec.
This will cause the fuel injectors to shoot more fuel, and the engine will run richer.
The FPR is a purely mechanical device.
It's made to bypass with a known input flow (i.e. stock FC turbo fuel pump).
Once flow rate is signnificantly changed (in this case, basically doubled), the FPR cannot hold back to it's original working specs.
An aftermarket FPR that is adjustable is highly recommended, especially if you want to adjust the fuel pressure back down.
Aftermarket adjustable FPR's are available a little over $100 with barbed fittings, so installation is moderately simple - you need to chuck the stock FPR (S5's are screwed
), and install a barbed fitting to connect to the new FPR.
-Ted
In my estimation, you're probably going to run about 10psi to 15psi higher that spec.
This will cause the fuel injectors to shoot more fuel, and the engine will run richer.
The FPR is a purely mechanical device.
It's made to bypass with a known input flow (i.e. stock FC turbo fuel pump).
Once flow rate is signnificantly changed (in this case, basically doubled), the FPR cannot hold back to it's original working specs.
An aftermarket FPR that is adjustable is highly recommended, especially if you want to adjust the fuel pressure back down.
Aftermarket adjustable FPR's are available a little over $100 with barbed fittings, so installation is moderately simple - you need to chuck the stock FPR (S5's are screwed
), and install a barbed fitting to connect to the new FPR.-Ted
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