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suspenceful suspenceful is offline
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Car: 2008 BSM 135i
Default My Experience Installing PR Stage 3+ LPFP and PR/MMP Port Injection - 07-24-2017, 02:04 PM

I update a blog-style website for my car. It helps me keep track of things that I've done, when they were done, etc. The latest update is me installing my Precision Raceworks Stage 3+ LPFP and MMP's port injection with BMS PI controller.

I know I enjoy reading these types of things from other people with various products, so I figured it wouldn't hurt to share here. I'll be doing a write-up on my MMP Stage 3 turbo experience soon. That one is a little longer.

Check it out for yourself: http://my1series.com/2017/07/24/bmw-...injection-kit/

Otherwise, I'll paste the full write-up below.

-------------

After installing MMP Stage 3 turbos on my 135i (write-up coming soon), I needed an upgraded fuel system to get the most power out of the car. I was filling up with an E40 mix of 93 and E85 , but my HPFP couldn't keep up and my old stage 1 inline LPFP was inadequate. I needed something that could handle straight E85 fuel and not run out of pressure at 700+whp.

Having good experiences with Robert at Precision Raceworks, I decided to go with his Stage 3+ Modular Fuel Pump Kit and opted for the upgraded fuel feed line and PNP harness. This would take care of my LPFP issues. I also purchased the PR/MMP Port Injection Kit at the same time to help my HPFP.

The products arrived quickly and were packaged nicely. I've always been satisfied with the quality from Precision Raceworks for the price. Upgraded fuel feed line not pictured.



The first step was to install the upgraded Stage 3+ bucket that had two Walbro 450s stuffed inside. Robert was nice enough to assemble the fuel pumps in a core bucket for me to swap out. Usually you have to modify your stock bucket while mounting and wiring up the pump yourself. I jumped in the back seat and got to work.









After fiddling around in the gas tank for a bit, I got the stock bucket out. New Precision Raceworks Stage 3+ bucket on the left, old OEM bucket on the right (with my old Stage 1 inline pump still attached). Note the additional terminals on the top of the new bucket for the secondary pump.





Installation was basically the reversal of disassembly. Fairly straightforward, more gas on the hands. A plug-and-play harness is included in the kit to activate the 2nd pump under boost. I routed it from the battery to the two terminals on the top of the bucket, then up under the hood to a Hobb's switch (also included) that screws right into the meth port my charge pipe. The PNP harness is very nice quality and makes installation a breeze. The 2nd pump is set to kick on anytime the car sees more than 15PSI of boost.

NOTE: I made the mistake of cutting the Hobb's switch off because I planned on using JB4 to trigger the pump, but later resorted to the Hobb's switch for various reasons. Those two blue crimps are my doing, the harness does not come this way.



Next up was installing the port injection kit and upgraded fuel line. I reconnected the battery right before this to test that the LPFP bucket installation worked as it should (and it did). However, for those of you who are aren't familiar with these cars, they run/prime the fuel pump every time a door opens after the car is "asleep". Well, I disconnected the OEM fuel feed line and then opened the door so I could route the upgraded line to the tank. As soon as I opened the door, the pump kicked on and fuel sprayed everywhere out of the open port. I'd assume a gallon of gas was on the garage floor before I quickly plugged the OEM line back in. Whoops!

Battery disconnected, OEM fuel line out, new fuel line routed and plugged in.





I ran the larger fuel feed line up to the front of the car and started removing parts so I could install the port injection kit.







Intake manifold removed, port injection plate installed. I added a dab of gasket sealer to the o-rings just to make sure they stayed on. The manifold studs have to be replaced with longer bolts, but it's best to leave two studs in, just hand tight. That way the port injection plate stayed aligned while I re-installed the intake manifold and tightened things down with five of the new longer bolts. Then remove the two studs and insert the two remaining bolts.



I connected the upgraded fuel line to the HPFP and port injection plate with the included T adapter. Then I plugged all of the injectors into the BMS port injection controller that I purchased ala-carte since I am using JB4. It took less than an hour to wire up the controller to my JB4 using the instructions at the top of this post. I forgot to take a picture of this, but I managed to fit everything in the DME box for a stealthy installation. Everything went back together smoothly and you can't even tell the port injection is in there unless you look for it.



After everything was back together, I connected the battery so I could test that the port injection worked. As soon as I did, the fuel pumps primed and I heard fuel spraying under the car. Not just a small leak, it was dumping fuel - another gallon or two on the floor. I quickly disconnected the battery and investigated.

Well, I forgot to plug this port on the plate! The kit comes with a proper plug and o-ring... make sure to use it. Another whoops!



I screwed in the plug and wrapped things up, then went out for my first full tank of pure E85. No more mixing!



The car runs great and pulls strong on 28PSI. I'm thrilled! Shoutout to Robert at Precision Raceworks. This installation isn't that hard but he promptly answered any questions I had. Not to mention the awesome pricing and quality of these products. I plan on getting his Precison Raceworks Ignition System Upgrade to go with this fuel system as well. I've already ordered a VRSF 7.5" race intercooler and colder spark plugs.


www.My1Series.com - 2008 135i w/ 6MT - 3260lbs
  • MMP Stage 3 turbos, inlets, outlets, 7.5" FMIC, downp!pes, charge pipe, TiAL BOV, RB PCV, BMS OCC
  • MMP port injection, PR Stage 3 fuel pumps, upgraded fuel line
  • JB4 @ 28PSI with BMS Hybrid E85 backend flash
  • PR ignition kit, NGK 97506 @ 0.020" with index 12 injectors
  • SPEC Stage 3+ clutch, MFactory SMFW, BMW Performance short shift kit
  • APEX ARC-8s, 235/265 Michelin PSS, Eibach Pro springs, StopTech drilled/slotted rotors and pads

Last edited by suspenceful; 07-24-2017 at 02:27 PM..
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AWSAWS's Avatar
AWSAWS AWSAWS is offline
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Posts: 1,367
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Car: 335i MSport DCT
Default 07-24-2017, 03:28 PM

Nice write up and the precision port injection looks pretty nice.
Do you use a bms flash or custom tune? I'm curious how the AIC is tuned and the cars flash is adjusted for the port injection.


UK FBO 335i, GCs, JB4, PI meth, BMS CP, OCC, Braided brake lines. Diff Lockdown. TMAP sensor, custom bucketless stage2

11.79@119mph on stockers, CP meth (UK, Santa Pod)
11.74@129mph on GCs, custom port meth injection.
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suspenceful's Avatar
suspenceful suspenceful is offline
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Car: 2008 BSM 135i
Default 07-24-2017, 07:49 PM

Quote:
Originally Posted by AWSAWS
Nice write up and the precision port injection looks pretty nice.
Do you use a bms flash or custom tune? I'm curious how the AIC is tuned and the cars flash is adjusted for the port injection.
Thanks! I'm running the BMS Hybrid E85 PI backend flash via MHD.

I don't know how the BMS PI controller is programmed or how it really works to be honest. I just know I can adjust the biases in the user adjustment settings of JB4.


www.My1Series.com - 2008 135i w/ 6MT - 3260lbs
  • MMP Stage 3 turbos, inlets, outlets, 7.5" FMIC, downp!pes, charge pipe, TiAL BOV, RB PCV, BMS OCC
  • MMP port injection, PR Stage 3 fuel pumps, upgraded fuel line
  • JB4 @ 28PSI with BMS Hybrid E85 backend flash
  • PR ignition kit, NGK 97506 @ 0.020" with index 12 injectors
  • SPEC Stage 3+ clutch, MFactory SMFW, BMW Performance short shift kit
  • APEX ARC-8s, 235/265 Michelin PSS, Eibach Pro springs, StopTech drilled/slotted rotors and pads
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JazRedGT JazRedGT is offline
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Posts: 242
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Car: 2007 335i E-92 6AT
Default 08-12-2017, 02:04 PM

I cant get my BMS PI to control my pump either


2007 AW 335i E-92 6AT MMP Stage 3 @ 24psi / JB4 G5 ISO / XHP STG3 / VRSF ** / MMP INLETS&OUTLETS / MHD E85 BACKEND / CW EXHAUST / CPe CP / GReddy RS BOV / BMS METH KIT / WAGNER IC / CYBA SCOOPS / BC STAGE2 LPFP 10.98 @ 131
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suspenceful's Avatar
suspenceful suspenceful is offline
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Car: 2008 BSM 135i
Default 08-14-2017, 07:40 AM

Quote:
Originally Posted by JazRedGT
I cant get my BMS PI to control my pump either
Yup, the new orange trigger wire on the BMS PI controller just turned the pump on all the time. Even with the car off. Had to resort to a Hobb's switch.


www.My1Series.com - 2008 135i w/ 6MT - 3260lbs
  • MMP Stage 3 turbos, inlets, outlets, 7.5" FMIC, downp!pes, charge pipe, TiAL BOV, RB PCV, BMS OCC
  • MMP port injection, PR Stage 3 fuel pumps, upgraded fuel line
  • JB4 @ 28PSI with BMS Hybrid E85 backend flash
  • PR ignition kit, NGK 97506 @ 0.020" with index 12 injectors
  • SPEC Stage 3+ clutch, MFactory SMFW, BMW Performance short shift kit
  • APEX ARC-8s, 235/265 Michelin PSS, Eibach Pro springs, StopTech drilled/slotted rotors and pads
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