Overvolting the fuel pump
Oct 8, 2006, 01:03 PM
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Overvolting the fuel pump
Hello...
what do yu think about overvolting the fuel pump ?
I know that Denso-Supra TT pump is very reliable and fail-safe, and it flows very much at higher voltages...
16 volt: 246 lph @ 80 psi
18 volt: 295 lph @ 80 psi
Are there cons in overvolting a fuel pump ?
Thank you, bye...
what do yu think about overvolting the fuel pump ?
I know that Denso-Supra TT pump is very reliable and fail-safe, and it flows very much at higher voltages...
16 volt: 246 lph @ 80 psi
18 volt: 295 lph @ 80 psi
Are there cons in overvolting a fuel pump ?
Thank you, bye...
Oct 8, 2006, 01:12 PM
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16-18v. seems kinda high to me. Most pumps are flow rated at 12v., and with a heavy duty hotwire kit they usually run them at 13.5, at least the Walbros. This is to the best of my limited knowledge, given my total lack of electrical understanding.
Oct 8, 2006, 02:57 PM
#4
I looked into a voltage amplifier for my Walbro, but just buying an external second walbro seemed easier and cheaper.
BTW, our Evos run 13.4 volts to our fuel pump under any load. That is really good, so hard wiring it isn't going to give you significantly more.
BTW, our Evos run 13.4 volts to our fuel pump under any load. That is really good, so hard wiring it isn't going to give you significantly more.
Oct 8, 2006, 03:01 PM
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Look Italian Evo, if it was me and I wanted to increase fuel volume while staying with the stock injectors, or larger injectors for that matter, I'd try Buschur Racing's increased capacity pump. It is a lot cheaper than the Supra pump, and in addition it is a direct bolt-in replacement. Just my .02
Oct 8, 2006, 03:06 PM
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Originally Posted by Smogrunner
I looked into a voltage amplifier for my Walbro, but just buying an external second walbro seemed easier and cheaper.
But you won't increase lph very much... Walbro are still 255 lph @ 43 psi...
Next step is the A1000, that I have already home... BUT is SOOOOO big !!!
and I'm not able to find a safe place under the car... given that I use it even off-road...
So, given that the Denso-Supra is infallible, maybe that increasing its voltage could be a good solution...
Oct 8, 2006, 03:06 PM
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[
[/QUOTE]
Good info
QUOTE=Smogrunner]I looked into a voltage amplifier for my Walbro, but just buying an external second walbro seemed easier and cheaper.
BTW, our Evos run 13.4 volts to our fuel pump under any load. That is really good, so hard wiring it isn't going to give you significantly more.
BTW, our Evos run 13.4 volts to our fuel pump under any load. That is really good, so hard wiring it isn't going to give you significantly more.
Good info
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Oct 8, 2006, 03:08 PM
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Originally Posted by sparky
Look Italian Evo, if it was me and I wanted to increase fuel volume while staying with the stock injectors, or larger injectors for that matter, I'd try Buschur Racing's increased capacity pump. It is a lot cheaper than the Supra pump, and in addition it is a direct bolt-in replacement. Just my .02
Oct 8, 2006, 03:12 PM
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ItalianEvo: I can't find the thread, but I remember reading that the Denso pump actually flows less than the Walbro at higher pressure levels. Just something to think about.
Oct 8, 2006, 03:19 PM
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Yes sparky,
I perfectly know it !!
But the Denso-Supra is really safe, when the Walbro is not...
so I trust more in increasing voltage to the Supra's than to the Walbro !
I perfectly know it !!
But the Denso-Supra is really safe, when the Walbro is not...
so I trust more in increasing voltage to the Supra's than to the Walbro !
Oct 8, 2006, 03:19 PM
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No one knows just how the Buschur pump differs from the standard Walbro 342SS pump. Some say it is a modified Walbro, I dont know. But as a practical matter the Buschur pump delivers enough fuel to go way over the 570 WHP range. Whereas the standard Walbros start to fall off above 540ish. How much power are you putting down at the wheels, anyway?
Oct 8, 2006, 03:25 PM
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420/430 whp now...
but I'm modifying/changing some parts and I'm expecting much more.
But real problem is that I have a 342 too, and I don't trust it anymore... so I want to change it and get something more reliable and that flows more..
but I'm modifying/changing some parts and I'm expecting much more.
But real problem is that I have a 342 too, and I don't trust it anymore... so I want to change it and get something more reliable and that flows more..
Oct 8, 2006, 03:34 PM
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Originally Posted by Smogrunner
I looked into a voltage amplifier for my Walbro, but just buying an external second walbro seemed easier and cheaper.
BTW, our Evos run 13.4 volts to our fuel pump under any load. That is really good, so hard wiring it isn't going to give you significantly more.
BTW, our Evos run 13.4 volts to our fuel pump under any load. That is really good, so hard wiring it isn't going to give you significantly more.
Oct 8, 2006, 03:37 PM
#14
Originally Posted by whitey4d
Evos have a dual amperage voltage circuit in there wiring harness. Theres more info about it at RREs webpage. Thers a pretty good diagram.
