I was going to ask this in KTA's thread about his pump testing, but couldn't find the thread, so I'll ask him here. KTA, in your research on the test stand, did inlet pressure ( i.e. stock vs piston lift pump) have a noticeable effect on case pressure and thus timing?
DP
Fuel inlet pressure vs case pressure
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Fuel inlet pressure vs case pressure
by dpuckett » Tue Oct 18, 2011 6:32 pm
His- 93 W250 club cab LE, auto to Getrag conversion, piston lift pump, 3.54 LSD. 400k+
Hers- 04 QC 4x4. Built auto, Triple Dog, Air Dog. Funny Round truck that aint so quiet.
Hers- 04 QC 4x4. Built auto, Triple Dog, Air Dog. Funny Round truck that aint so quiet.
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Re: Fuel inlet pressure vs case pressure
by KTA » Wed Oct 19, 2011 1:00 pm
Yes inlet pressures can somewhat effect timing but not to a signifigant extent since typicaly case pressure is over 100psi and that is signifigantly above both styles of pumps pressures. Fuel delivery rates out of the pump have a far greater effect on the timing curve.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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KTA - diesel guru/mod
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