lpfp for e50?

ttbullet · 11-12-2013, 10:40 AM

is an upgraded lpfp needed to run e50. If it is needed which pump are the guy with e50 running.
Thanks

idrift4wd · 11-12-2013, 10:45 AM

depends. It should be okay without, but logs will show if your stock lpfp can handle it or not.

marc@x-ph.com · 11-12-2013, 11:12 AM

Like said above, try it out and log. if your pressure is dangerously low, and you're leaning out then you'd have to go aftermarket.

With a good tune for E50, I think you might be OK if your pump is in good shape.

enrita · 11-12-2013, 11:29 AM

Yes

135Pats · 11-12-2013, 11:39 AM

Unless your stock pump is very healthy, I doubt it will flow enough for E50. Granted my stock pump is probably on the way out, but it gets its’ ass kicked on multi-gear pulls when running E30. The low pressure side falls below 45PSI at times.

I’d log E30 first to be sure. If your high pressure isn’t being dragged down too much and you aren’t pegging trims, you may be able to run E50 on a newish LPFP. But I’d be willing to bet you’ll need an aftermarket pump to up the flow rate.

lawwailok · 11-12-2013, 02:20 PM

my stock pump was getting old when i was tuning for only E25, it saw 47psi, so i ended up replacing an OEM pump and now on E40, hovering around 70psi no problem.

lawwailok · 11-12-2013, 03:34 PM

@ttbullet, your inbox is full, can't reply to your PM, hahahaha

ttbullet · 11-12-2013, 03:57 PM

Any shops in la orange county area that do the fuel pump upgrade.

BQTuning · 11-12-2013, 05:05 PM

It depends on the car and the car's health, with almost 50k miles when I took this test log at the track this is what my fuel trims looked like on E50 - E55

11-12-2013, 10:40 AM	#1
ttbullet Second Lieutenant 34 Rep 243 Posts Drives: 2009 135i Join Date: Oct 2008 Location: 949 area code iTrader: (0)	lpfp for e50? is an upgraded lpfp needed to run e50. If it is needed which pump are the guy with e50 running. Thanks
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11-12-2013, 10:45 AM	#2
idrift4wd Brigadier General 151 Rep 3,549 Posts Drives: Three Hundred and Thirty Five Join Date: Jul 2010 Location: Yonkers NY iTrader: (0) Garage List 2007 BMW [7.00]	depends. It should be okay without, but logs will show if your stock lpfp can handle it or not. __________________ 12.0 @ 117
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11-12-2013, 11:12 AM	#3
marc@x-ph.com BimmerPost Supporting Vendor 15 Rep 678 Posts Drives: 2010 e92 335i Join Date: Sep 2013 Location: USA iTrader: (0)	Like said above, try it out and log. if your pressure is dangerously low, and you're leaning out then you'd have to go aftermarket. With a good tune for E50, I think you might be OK if your pump is in good shape.
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11-12-2013, 11:29 AM	#4
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	Yes
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11-12-2013, 11:39 AM	#5
135Pats Major General 461 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	Unless your stock pump is very healthy, I doubt it will flow enough for E50. Granted my stock pump is probably on the way out, but it gets its’ ass kicked on multi-gear pulls when running E30. The low pressure side falls below 45PSI at times. I’d log E30 first to be sure. If your high pressure isn’t being dragged down too much and you aren’t pegging trims, you may be able to run E50 on a newish LPFP. But I’d be willing to bet you’ll need an aftermarket pump to up the flow rate. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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11-12-2013, 02:20 PM	#6
lawwailok Lieutenant Colonel 153 Rep 1,922 Posts Drives: E90 335i, E70 X5 Join Date: Aug 2009 Location: Sacramento, CA iTrader: (18) Garage List 2007 E90 335i [8.00] 2009 E70 xDrive30i [0.00]	my stock pump was getting old when i was tuning for only E25, it saw 47psi, so i ended up replacing an OEM pump and now on E40, hovering around 70psi no problem. __________________ -eric E90 335i TiAg STOCK see my garage for mod list.. E70 X5 SGM try to stay stock :/
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11-12-2013, 03:34 PM	#7
lawwailok Lieutenant Colonel 153 Rep 1,922 Posts Drives: E90 335i, E70 X5 Join Date: Aug 2009 Location: Sacramento, CA iTrader: (18) Garage List 2007 E90 335i [8.00] 2009 E70 xDrive30i [0.00]	@ttbullet, your inbox is full, can't reply to your PM, hahahaha __________________ -eric E90 335i TiAg STOCK see my garage for mod list.. E70 X5 SGM try to stay stock :/
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11-12-2013, 03:57 PM	#8
ttbullet Second Lieutenant 34 Rep 243 Posts Drives: 2009 135i Join Date: Oct 2008 Location: 949 area code iTrader: (0)	Any shops in la orange county area that do the fuel pump upgrade.
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11-12-2013, 05:05 PM	#9
BQTuning Banned 475 Rep 4,392 Posts Drives: 2012 Z4 sDrive35i M Sport 6MT Join Date: Nov 2010 Location: bq@bqtuning.com iTrader: (0)	It depends on the car and the car's health, with almost 50k miles when I took this test log at the track this is what my fuel trims looked like on E50 - E55 Attached Images
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