Member
Hi, I'm going to replace the fuel pump on my m240i with the Supra pump. The sensor is positioned opposite the original harness. Is it necessary for an extension in the harness or is it possible to rotate the sensor?
Member
Just out of curiosity why are you swapping in a Supra fuel pump?
Member
Hi, I am exchanging the original discharge pump of my B58 with the discharge pump of the Supra B58TU. this is an upgrade.
Member
I bet you won’t gain any performance. Why? The fuel pump in the tank supplies fuel at a relatively low pressure. There’s a very high pressure mechanical pump located on the cylinder head. It’s driven by the exhaust cam. This boosts the pressure up to thousands of psi. Why so high? Direct injection.
Member
https://bmwtuning.co/bmw-b58-fueling-mods-guide/Originally Posted by MarcoZandrini
Member
Ok, that’s the pump that runs off the camshaft. I thought you were writing about the electric fuel pump. While the pump in the link gives you increased fuel pressure (and likely flow), the engine runs in a closed loop mode. That is, the engine computer (DME) regulates the column of fuel going into the combustion chamber based primarily on the data from the ore-catalytic converter oxygen sensor and to a less extent in the data from the post -catalytic converter oxygen sensor. So, unless you mod the DME software you may not get a sizable increase in power.
JMHO YMMV
Last edited by MarcoZandrini; 03-17-2021 at 07:52 AM.
Wagon meister :)
BMW Tech Expert
+1
You are going to need a tune in order to take advantage of the extra fueling, otherwise you will not get the gains by just installing a HPFP.
Also when dealing with that much HP, you will want to look at a custom tune, for most can tunes will not get to that number as the tuner doesn't want you to blow up the motor right out the box.
You might see a 2-5 hp increase as the BMW tune can adjust a little bit to compensate for the extra fueling.
Darin
Current:
16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
Past:
95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
82 528i euro Saphire Blue Met/Blue Leather RIP
79 525 euro Green/Green RIP
79 318 Silver/Black - The first one that got it all started
M-Flight Member
Posting Permissions
Reply With Quote
Bookmarks