Fuel MODs?
Hotshot
Joined: Nov 2006
Posts: 11,288
Likes: 269
From: North of Greenville
In that case, wouldn't Guzzle's approach with the lift pump feeding into the stock pump sort of counter the impact of the higher pressures to some degree? An even better "final touch" may be Kwik's in-tank pump approach, too.
in my line of work, i work with pump-sizing issues quite frequently, and you're right, Tenn, increased load does equate to shortened life to a certain degree. That's why I think that either a lift pump or in-tank pump would offset some (or most) of that impact by reducing the suction requirements on the system design. Essentially, when you reduce the suction load on a pump, that amount of "suction load capacity" then can transfer straight into the "discharge pressure capacity" without affecting pump life at all. Without doing the friction calculations and associated pressure losses, it's impossible to say if it will be an equivalent tradeoff in the end.
in my line of work, i work with pump-sizing issues quite frequently, and you're right, Tenn, increased load does equate to shortened life to a certain degree. That's why I think that either a lift pump or in-tank pump would offset some (or most) of that impact by reducing the suction requirements on the system design. Essentially, when you reduce the suction load on a pump, that amount of "suction load capacity" then can transfer straight into the "discharge pressure capacity" without affecting pump life at all. Without doing the friction calculations and associated pressure losses, it's impossible to say if it will be an equivalent tradeoff in the end.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
The VW pump that I use is designed to run at 73psi system pressure on gasoline. If they have an adequite fuel supply ( customer never runs below 1/4 tank ) they would easily go beyond 100,000 miles before the brushes would wear out and the pump stop.
Diesel is a tad thicker, but not by much.
Diesel is a tad thicker, but not by much.
