Quote:
Originally Posted by rw7810
Grady - With all respect. I've been running a "dead head" system on my 70 T with Zeniths for 20 years. I tried the recirculating system, but it wouldn't register any pressure. Maybe I was missing something like a restricter in the return line ??
PS: are there any rotary pumps out there any more?? I've been using a Facet Low Pressure Cylindrical Fuel Pump from Pegasus Racing mounted on the front cross bar. Just found this Carter rotary pump and may give it a try.
Carter and Webers |
The recirc system needs a restriction (the regulator) on the return side to hold pressure back to the carbs.
There are lots of rotary pumps out there. Holleys (marginally OK), Pierburg, Carter, Mallory, Aeromotive,....... do a search on summitracing.com and you can sort thru the bazillion different bumps.
The Carter link is a nice piece of tech info. But I wonder if their information is correct. TEP says the pump is rated at 4psi and needs no regulator. I have no problem with that if it is indeed 4 psi. But specs on the pump indicate its rated at 6 psi (free flow?).
Carter GP4070 - Carter Universal Rotary Vane Electric Fuel Pumps - Overview - SummitRacing.com
Nonetheless looks like a nice pump. I think for a bit more money we could get a gerotor style pump that is quieter and more reliable. The vane style pump design like the Carter or Holley is a bit dated. I'll shoot some pics of the Holley innards to show what I mean.
The gerotor design is made of meshing gears, similar to the 911 oil pump design.