lpfp upgrade and filtering

tinnsoldaten · 05-28-2013, 12:26 PM

With the use of the Walbro 450 into the stock bucket I cant help but wondering if there should be one more filter in play.

The pump inlet is connected to the filter , that is ok.

The outlet from pump goes to an T and on to the cars fuel line.
The third on the T goes to the siphon in bottom of bucket and fuel is sucked from there without any filter.

Does the total feed get filtered further before going to the injectors ? I know there is the active coal filter , but dont know anything more in regards to filtering.

tinnsoldaten · 05-28-2013, 03:21 PM

Nobody?

enrita · 05-28-2013, 03:42 PM

the siphon is only used to keep the bucket full , that fuel goes back into the pump.
And yes there is another filter on the other side where the pressure regulator sits.

tinnsoldaten · 05-28-2013, 04:07 PM

Like Im thought , the T will be what generates the vacuum fluid going from pump to car fuel line , the third leg on the T , going to siphon will transfer this vacuum to siphon valve in bottom of bucket and transfer should also go back to the T.

So the filter on the pump is just to protect the pump itself , nothing more?

Supply from the T is fuel filtered thru the pump filter and unfiltered from siphon.

Is this correct ?

05-28-2013, 12:26 PM	#1
tinnsoldaten Captain 37 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	lpfp upgrade and filtering With the use of the Walbro 450 into the stock bucket I cant help but wondering if there should be one more filter in play. The pump inlet is connected to the filter , that is ok. The outlet from pump goes to an T and on to the cars fuel line. The third on the T goes to the siphon in bottom of bucket and fuel is sucked from there without any filter. Does the total feed get filtered further before going to the injectors ? I know there is the active coal filter , but dont know anything more in regards to filtering. __________________ Vargas S2 turbos\|VAC S3 Cylinder head\|RR DPs\|RR MPs\|Supersprint X pipe\|Remus Quad Sport mufflers\|aFe Stage 2 Si with scoops\|Forge DVs\|ER CP\|BMS meth elbow\|Aquamist HFS-4\|Walbro 450 E85 LPFP\|AA FMIC\|BMS OCC\|MHD\|P3 Boost Gauge\|Ohlins Road & Track + camberplates\|M3 sways F/R+ Ground control endlinks\|Vorsteiner v303 19"\|Michelin PS2 sport\|Quaife LSD\|Vorsteiner V35 CF hood\|CF CLS trunk\|Duke Dynamics quad diffusor
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05-28-2013, 03:21 PM	#2
tinnsoldaten Captain 37 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	Nobody? __________________ Vargas S2 turbos\|VAC S3 Cylinder head\|RR DPs\|RR MPs\|Supersprint X pipe\|Remus Quad Sport mufflers\|aFe Stage 2 Si with scoops\|Forge DVs\|ER CP\|BMS meth elbow\|Aquamist HFS-4\|Walbro 450 E85 LPFP\|AA FMIC\|BMS OCC\|MHD\|P3 Boost Gauge\|Ohlins Road & Track + camberplates\|M3 sways F/R+ Ground control endlinks\|Vorsteiner v303 19"\|Michelin PS2 sport\|Quaife LSD\|Vorsteiner V35 CF hood\|CF CLS trunk\|Duke Dynamics quad diffusor
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05-28-2013, 03:42 PM	#3
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	the siphon is only used to keep the bucket full , that fuel goes back into the pump. And yes there is another filter on the other side where the pressure regulator sits. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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05-28-2013, 04:07 PM	#4
tinnsoldaten Captain 37 Rep 715 Posts Drives: e92 335i coupe Join Date: Dec 2008 Location: Bergen iTrader: (1)	Like Im thought , the T will be what generates the vacuum fluid going from pump to car fuel line , the third leg on the T , going to siphon will transfer this vacuum to siphon valve in bottom of bucket and transfer should also go back to the T. So the filter on the pump is just to protect the pump itself , nothing more? Supply from the T is fuel filtered thru the pump filter and unfiltered from siphon. Is this correct ? __________________ Vargas S2 turbos\|VAC S3 Cylinder head\|RR DPs\|RR MPs\|Supersprint X pipe\|Remus Quad Sport mufflers\|aFe Stage 2 Si with scoops\|Forge DVs\|ER CP\|BMS meth elbow\|Aquamist HFS-4\|Walbro 450 E85 LPFP\|AA FMIC\|BMS OCC\|MHD\|P3 Boost Gauge\|Ohlins Road & Track + camberplates\|M3 sways F/R+ Ground control endlinks\|Vorsteiner v303 19"\|Michelin PS2 sport\|Quaife LSD\|Vorsteiner V35 CF hood\|CF CLS trunk\|Duke Dynamics quad diffusor
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