[wagspe208]

I'd be interested in knowing the specs in gph and psi of the various lift pump setups/systems you guys are using. (kennedy, tts, fass, holley black, etc) Also, are the pumps (as the kennedys and tts pumps are) able to flow through in the event of failure?
I'll start, the edelbrock 1792 flows 160 gph at 12 psi.
This sure seems like alot of fuel for low hp applications. Also, a sytem designed for 0 psi input, 12 psi is a bunch.
I am a new guy, and have done tons of searching on lift pumps. This is just for more knowledge.
Thanks
Steve

 

[keith_2500hd]

most fuel pumps are rated for pumping gasoline, fuel/temp has viscosity difference that will lower the gph rate. any pump should work until you go for large HP numbers(450+). as long as there's not vacuum at test point, would be fine. if vane pump(holley,carter) need bypass check valve, for when(if) not running, centrifugal pumps allow fuel to pass through.

 

[wagspe208]

I understand the need for a bypass if using a "conventional" style pump. Do most guys use a check valve to prevent fuel from going back to tank when the pump is running? Seems like it would be simple enough to "T" into the line from tank, one line to check valve, one line to pump, then "T" back into one line. The check valve would prevent "pumped fuel" from returning to tank, and if pump fails, would "suck" through the check valve.
Is this about right?
Any recommendations for a check valve?
Thanks
Wags
PS, was also thinking abnout using the 6.5L lift pump. Are those of a flow through design?

 

[HoustonDMax]

I understand the need for a bypass if using a "conventional" style pump. Do most guys use a check valve to prevent fuel from going back to tank when the pump is running? Seems like it would be simple enough to "T" into the line from tank, one line to check valve, one line to pump, then "T" back into one line. The check valve would prevent "pumped fuel" from returning to tank, and if pump fails, would "suck" through the check valve.
Is this about right?
Any recommendations for a check valve?
Thanks
Wags
PS, was also thinking abnout using the 6.5L lift pump. Are those of a flow through design?[/quote]

Yes.

 

[wagspe208]

Whew. thanks Houston.
I did my homework, several searches before opening a duplicate post.
I thought there would be more interest in separating myth from reality by showing the numbers. Guess I was wrong.
Thanks again.
Wags