Need 12mm pump for race520 nozzles and high rev engine

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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby oldestof11 » Wed Jul 09, 2014 3:00 pm

What is your lift pump?
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93 D250~ Mismatch of cheap parts, trying to look fast going slow
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby zeejay83 » Sun Jul 13, 2014 12:50 am

I had 2 pump in the tank. 0,5 bar 120l per minuter each one. But one pump died. I drive now without pumps. You think pump in the tank must have higher l/h. I think about higher pressure pump but with pressure regulator... Does petrol pump survive with diesel.
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby oldestof11 » Sun Jul 13, 2014 11:00 am

If the VE's need to pull their own fuel, then it is going to suffer at higher RPM's.

So is the combined pumps making (before it quit) 1.0 bar and 240l per minute? Or making .5 bar and 240l min?

For reference, we typically run 1-1.3 bar of pressure. The higher pressure helps keep the fuel fed into the case. The 12mm can, and does, drain the case pressure where it fills the rotor. So higher pressure and flow helps to not drain it.

Petrol pumps may or may not hold up. However, a good Walbro does. I prefer the GS392 Walbro. The 044 should hold up.
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby zeejay83 » Thu Jul 24, 2014 3:43 pm

Very helpfull, i bought now 220l/h fuel pump i think it will help. Change thos 495 springs into 410 high rpm springs and camplate into de143. i saw that pump rotate very softly , much more softly that on de110 and 495 springs. I set new KF value for 410 springs so maybe i must make them hughs and kisses more :lol: hehe strange translate :shock:
It rotate like Td pumps does.
And what i saw in esitronic pump is that 11mm with de143 have one shim less under the plunger in roterhead. So maybe i must tightened those 410 springs much more. ( this shim have 1,0 or 1,6mm there are two of them , but 11mm have only one ).

hm maybe i buy second one 220l/h pump :roll:
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby oldestof11 » Thu Jul 24, 2014 4:11 pm

Sounds like it should help.

Is this for a VW TDi? Or VW IDI?
Jon
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby zeejay83 » Thu Jul 24, 2014 6:48 pm

It is for TDi but someone says that Timing from 11mm pump don't like pressure higherthan 0,5 bar in fuel inline.
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby oldestof11 » Thu Jul 24, 2014 6:56 pm

I have pushed 20psi, or 1.5bar in my rigs. My brother pushed 1.0 bar in his ALH TDI with the 10mm pump.
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby zeejay83 » Thu Jul 24, 2014 11:21 pm

10 mm pump intdi have different timing cylinder.
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby Spiegelmann » Mon Sep 07, 2015 7:32 am

I`m intresting too is 2 piece rollers more durable?!
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby oldestof11 » Mon Sep 07, 2015 9:26 am

I think the 1 piece solid ones are the most durable
Jon
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby Spiegelmann » Mon Sep 07, 2015 10:21 am

oldestof11 wrote:I think the 1 piece solid ones are the most durable

Many thanks!!!
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Re: Need 12mm pump for race520 nozzles and high rev engine

Postby Douglas » Tue Sep 08, 2015 11:14 am

The ALH TDi's use the VE to draw fuel from the tank. Sure looks to me like another lift pump would be of use. The Carter 4601 is diesel rated, and has survived nearly a half decade in my 1990.

Listening closely as I'd love to build a 12mm pump for my ALH. I sold an engine to a guy who was just putting a 3.9 pump on his to get the 12mm pump head. No need for high rpm in *MY* app...but a solid increase in fuel between 2k5 and 3k5 would sure help justify spending on a bigger turbo...LOL those things are as bad as owning cummins-es for a drain on the entertainment budget.
cheers,
Douglas
1990 D250, NV5600, 16cm housing and PAC brake, Powr-Lok'd 3.07's, HX35...IC next

1991 D250, 727 and 16cm H1C.
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