by Remps » Tue Oct 03, 2017 1:07 pm
If a 12 valve producing 450+ horsepower is being fed (a potential) 150 lbs/min of air at 50-60 psi from compound turbos, but only actually requires 65-75 lbs/min to make 450+ horsepower, could excess volume/pressure be used to run an air over hydraulic case feed pump? Or possibly an air over hydraulic boost pump? (As of now unsure of the volume of air required to run these)
Lets say it has a working air pressure of 40-125 psi, consumes 12 scfm, and can pump 40 cubic inches of fluid per minute at 500 psi with 40 psi input. Pumped fluid pressure is pretty much stalled out at 1 cubic inch per minute at 5000 psi with 40 psi input, not really important for a secondary relieved pump case, lets say a 300 psi secondary case pressure bypass, with it's own return to the fuel tank.
How much of a drop in boost at wot would one see using boost pressure to run a pump like this, and would one see boost returned (and maybe increased) by the extra fuel provided? I'd guess that doubling or possibly tripling the case pressure (from a setup with huge injectors) has to have an effect on fill time/volume in the plunger, especially at higher rpms.
Also the timing piston would stay pegged at full travel where it should be when wot at 2700+ rpms. With the factory fuel inlet/vane pump providing the volume of fuel, and with case pressure above zero, the case is full, it just needs a low volume/high pressure pump to maintain pressure.
Any and all thoughts and ideas welcome, good or bad.
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
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