Thread: procharger+carb
View Single Post
Old Apr 27, 2008 | 09:36 PM
  #3 (permalink)  
obituary's Avatar
obituary
TR OG
 
Joined: Oct 2001
Posts: 933
Likes: 0
Default

Originally Posted by Tiffiny
7 psi and you should go with a bypass return style fuel system
yeah i was reading on prochargers site .to use a elec fuel pump ,but they say......






=========Fuel pump (carbureted applications):
Your fuel pump must be capable of supplying the proper amount of fuel flow at the maximum operating pressure. To determine maximum operating fuel pressure requirement, add your maximum boost pressure to your initial idle fuel pressure.

Example:
(8 psi idle fuel press.) + (10 psi boost press.) = 18 psi max. fuel press.

multiplying this figure by 1.2 (20% safety factor) gives us 21.6 psi

To determine required fuel flow, multiply your total expected horsepower by a bsfc (brake specific fuel consumption) of .65. This will give your fuel flow requirement in 1bs/hr. To convert to gallons per hour, divide this figure by 5.87.

Example:
(500 boosted hp) x (.65 lbs/hr/hp bsfc) = 325 lbs/hr fuel flow

325 lbs/hr / 5.87 lbs/gal = 55.4 gals/hr fuel flow

Therefore, a fuel pump capable of providing a minimum fuel flow of 55.4
gals/hr at a pressure of 21.6 psi is required.

This can be accomplished by an all electric high pressure-high flow fuel pump (i.e. SX #18201, B.G. 400, Magna-Flow 250 or similar type fuel pump) and a return style, boost sensitive fuel pressure regulator (Mallory #4309 or similar). Or by using a boost referenced mechanical fuel pump only (up to 500 hp) or a boost referenced mechanical fuel pump in conjunction with a low pressure electric pump (i.e. Holley blue, Comp 140 or similar).=========







sounds complicated
__________________
1972 nova ss
89 240 sr20det
2002 chevy 1500 truck


Reply