Preching to the choir i am sure but 13.7 volts is a very good place to be.
Running the right gauge wire is very critical as is a good altenator they
generally add power unless you have one of theose Mitsubushi ones used on a
lot of one wire kits and a lot of electornics, be prepared for the skipping
noise if that is the case. Carbs fine EFI no way. Yes the filterng and
regulation really is that bad.
Dave
> -----Original Message-----
> From: Albaugh, Neil [mailto:albaugh_neil@ti.com]
> Sent: Monday, March 20, 2006 3:57 PM
> To: Dave Dahlgren; John Burk; land-speed
> Subject: RE: Fuel Pump Flow
>
>
> Dave;
>
> Amen to that. The only valuable information about a fuel pump (just like
> a cooling fan) is the curve of its flow vs back pressure. Advertising
> claims are worthless-- "500GPH" says nothing. Some types of pumps (and
> fans) have a very steep flow/pressure curve; lots of flow into an open
> outlet but the volume of liquid drops off dramatically as the output
> pressure increases. It's like putting your thumb over the end of a
> garden hose.
>
> Other types of pumps, notably positive- displacement pumps, lose much
> less flow as the back pressure is increased. These types have a
> relatively flat curve. Hydraulic pumps fit into this category; a
> centrifugal pump would be a poor type to use in a hydraulic system.
>
> How many electric pumps also provide a family of curves-- not only flow
> vs back pressure curve but curves for different DC voltages measured
> directly at the pump? Only the quality manufacturers do that.
>
> Those curves also show how keeping the wiring voltage drop low can boost
> the output of your pump.
>
> Regards, Neil Tucson, AZ
>
>
> -----Original Message-----
> From: owner-land-speed@autox.team.net
> [mailto:owner-land-speed@autox.team.net] On Behalf Of Dave Dahlgren
> Sent: Monday, March 20, 2006 1:01 PM
> To: John Burk; land-speed
> Subject: RE: Fuel Pump Flow
>
> Without knowing the pressure the flow is meaningless. Basically you ne
> 0.5
> lbs per hour at the required pressure plus line losses and the amout you
> plan on bypassing so as to keep air and vapor out of the system. this is
> for
> typical gaolines. alky is approximately double the needed fuel. I have
> never
> run nitro so have no comment on that but double it again would not
> surprise
> me.
> dave
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