Keeping IP alive w/stock lift pump

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Keeping IP alive w/stock lift pump

Postby spencerdiesel » Mon Nov 02, 2015 4:12 pm

Hey everyone, only mods are fuel pin and 366 spring. How much fuel is "ok" to run over stock, before diaghram pump can't keep enough fuel to the IP for longevity? I'll be getting 12 psi piston pump, but it'll be a little while. Can I turn my fuel screw in just a little?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
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Re: Keeping IP alive w/stock lift pump

Postby CumminsPower59 » Thu Nov 05, 2015 11:20 am

Get a fuel pressure gauge on it and see then. It's not hard to pull the stock lift pump down to 0psi with just pump mods (in my experience).
Ike

91 W350 SRW, 3.07's, NV4500, 370's, THD LPPP, Super HX40, 2nd gen IC swap, BHAF, Isspro's, 2" lift, 285's on 3rd gen 17"'s.
04 VW Jetta Wagon TDI 5speed
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Thu Nov 05, 2015 5:15 pm

Thank you.
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Tue Nov 17, 2015 6:02 am

I know I should get a gauge, but not feasible for the time being.

Truck doesn't "fall on its face", but piddles out noticeably at 2800 rpm.
I know VE's aren't high revvers, but is that a bit early? I promise eventually ill get a piston pump :roll:
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
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Re: Keeping IP alive w/stock lift pump

Postby CumminsPower59 » Tue Nov 17, 2015 6:11 am

Sounds like you are out of fuel. Get a gauge on there. Cheaper than a injection pump.
Ike

91 W350 SRW, 3.07's, NV4500, 370's, THD LPPP, Super HX40, 2nd gen IC swap, BHAF, Isspro's, 2" lift, 285's on 3rd gen 17"'s.
04 VW Jetta Wagon TDI 5speed
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Re: Keeping IP alive w/stock lift pump

Postby PToombs » Tue Nov 17, 2015 5:02 pm

Geno's garage has the banjo bolt tapped for 1/8th pipe for $7 or $8, and any pressure gauge will work to see what is going on. And old oil pressure gauge, boost gauge (I've seen them used), as long as you can read the pressure it will work for a temporary trouble shooting tool.
pete

Just enough power to break everything behind the crankshaft.
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Wed Nov 18, 2015 8:33 am

That's defiantly doable then.
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
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Re: Keeping IP alive w/stock lift pump

Postby 1STGENFARMBOY » Mon Nov 30, 2015 9:53 pm

I have a $15.00 summit mechanical fuel psi gauge on my truck along with the banjo bolt Pete spoke of, works fine
93 W250 STD CAB, AUTO 3.55, GAUGES, 80HP DDP STICKS, DENNY T ,16CM HOUSING, 60MM GILLETT, VE MAXED,BHAF, BHFF, 366 SPRING,P/S INTERCOOLER, TIMS COOLER TUBS, TIMMING 1/8 BUMP,4in TURBO BACK TO DUEL 5IN STACKS,33 12.50 BFG, HOLLEY BLACK, CONVERTER COOMING.
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Tue Dec 01, 2015 7:01 pm

Great info, I like saving greenbacks. Ordered the piston pump from THD, 12 psi spring. Put 7'' fs1221 filter on. Just the bigger filter actually took 3 tenths off the 30-60 time. Previous wasn't clogged either, cut it open and just found a couple specs. Could the extra surface area aid in flow just like on an air filter?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Wed Dec 02, 2015 3:57 pm

Pump came in, fingers are twitching
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Sun May 08, 2016 2:13 pm

Looking at the isspro R5604R mechanical gauge. I've ordered the banjo bolt, should I have bought the one that came with a snubber instead? Will the needle bounce?

What tubing is the best/safest to run since fuel will be going into the cab?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
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Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Keeping IP alive w/stock lift pump

Postby CumminsPower59 » Mon May 09, 2016 5:06 am

Well, some get away with running the fuel line into the cab, but I have an isolator on my mess. Uses antifreeze/coolant on the other side. Has worked flawlessly for many years. It's easier to get the banjo with the "snubber" built in, or get a needle valve from a hardware store and add it after the banjo. If you run the line off the regular banjo directly to the gauge, you're wasting money as you'll kill the gauge with the pulsating pressure.
Ike

91 W350 SRW, 3.07's, NV4500, 370's, THD LPPP, Super HX40, 2nd gen IC swap, BHAF, Isspro's, 2" lift, 285's on 3rd gen 17"'s.
04 VW Jetta Wagon TDI 5speed
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Re: Keeping IP alive w/stock lift pump

Postby spencerdiesel » Mon May 09, 2016 10:58 am

I'd love to plumb an isolator but every one I've looked at is astronomically pricy....so the guage would live if I installed a needle valve after the banjo?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
Muffler delete
spencerdiesel
14mm rotor
 
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Joined: Tue Oct 27, 2015 4:02 pm
Location: Brevard, NC
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Re: Keeping IP alive w/stock lift pump

Postby CumminsPower59 » Mon May 09, 2016 1:29 pm

You're looking in the wrong place then...I think mine was $50...
Ike

91 W350 SRW, 3.07's, NV4500, 370's, THD LPPP, Super HX40, 2nd gen IC swap, BHAF, Isspro's, 2" lift, 285's on 3rd gen 17"'s.
04 VW Jetta Wagon TDI 5speed
CumminsPower59
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Re: Keeping IP alive w/stock lift pump

Postby RCCUMMINS89 » Wed May 11, 2016 11:53 pm

I literally run the boost gauge kit, and hook it up like an oil pressure gauge.

I have zero needle bounce by leaving air in the lines. Simple and affordable. Never had a failure.
89 RC on shortened 92 diesel frame - NV4500 w/dual disc/4.10s on 37s. - Self built pump, "hot screw", lots of timing, True high volume low pressure lift pump, 62fmw/68/.7gated, 77lpm SAC Inj., Studs/O-rings,- 423/1220 Mustang - 11/16/2013 http://www.TheHungryDiesel.com full line dealer, if you don't see it please ask.
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