Technical Aftermarket FPR mounting location?

Mikejones1208

Corporal
Dec 6, 2016
115
96
0
Savannah, GA
Ride
2009 BMW 335i
Currently redoing my fuel system, where have some of you guys mounted your FPR's at in the engine bay? Having a hard time figuring out where i want to put it
 
Last edited:

veer90

Captain
Nov 16, 2016
1,000
762
25
West Nyack, NY
Ride
e90 335i 6MT
I have it zip tied to the AC line elbow behind the alternator.

Precision Raceworks gave me some grief when they saw how I mounted their reg lmao
 
  • Like
Reactions: JuniorB

PFS

Corporal
Premium Vendor
Nov 19, 2018
156
191
0
Ride
335i
I know you said "in the engine bay" but there is a great spot underneath on the driver's side to mount a filter and FPR. It's away from heat and vibration, and no need to run a return line all the way from the engine bay.

47689063_2318536791807170_548556293946736640_o.jpg
47388311_2318536835140499_2450401867411226624_o.jpg
 
Last edited:

PFS

Corporal
Premium Vendor
Nov 19, 2018
156
191
0
Ride
335i
Not installed yet when that photo was taken, will exit bottom of FPR with a 90* and flow back to tank.

IMG-5579.JPG
IMG-5584.JPG
 
Last edited:
  • Like
Reactions: Twinz and veer90

PFS

Corporal
Premium Vendor
Nov 19, 2018
156
191
0
Ride
335i
I think this is the route im gonna go, why the 2 feed lines coming from the tank?

Most common would be a dual pump system with one of the pumps being "external", i.e. it exits through the top hat, bypassing all internal tank regulator/etc. You get significantly more flow out of that second pump routed like that for a modest cost increase and not much work done inside the tank (lpfp drop-in only).

Of course we sell the filter/FPR with a single input as well if that's more your speed.
 
  • Like
Reactions: Mikejones1208

Mikejones1208

Corporal
Dec 6, 2016
115
96
0
Savannah, GA
Ride
2009 BMW 335i
Oh im building my own setup! But yeah that makes sense, never thought by passing the intank filter for just the second pump, im putting in a new intank filter and just running dual 450's with a return, im only shooting for 700-750whp so my setup should be able to supply that! But i think ill mount it under the car like your setup looks clean and less clutter in these tight engine bays, definitely makes it easy to route the return, hopefully it wont cause any issues not being after the rail. I guess i should be able to adjust it to compensate
 

The Convert

Captain
Jun 4, 2017
1,485
1,038
0
Ride
335
Oh im building my own setup! But yeah that makes sense, never thought by passing the intank filter for just the second pump, im putting in a new intank filter and just running dual 450's with a return, im only shooting for 700-750whp so my setup should be able to supply that! But i think ill mount it under the car like your setup looks clean and less clutter in these tight engine bays, definitely makes it easy to route the return, hopefully it wont cause any issues not being after the rail. I guess i should be able to adjust it to compensate
You can still put it after the rail under the car.
 

Mikejones1208

Corporal
Dec 6, 2016
115
96
0
Savannah, GA
Ride
2009 BMW 335i
Yeah i could but wouldn't mounting it that far back behind the rail cause it to drop pressure by the time it hits the regulator then
 

PFS

Corporal
Premium Vendor
Nov 19, 2018
156
191
0
Ride
335i
It doesn't really matter as long as you have sufficient flow capability (lpfp side, you have many options here), you have lines that will flow enough (easily accomplished), and you can adjust your regulator as required (you can). Plus most of you in this section have the low pressure fuel pressure sensor to use as a reference for what's going on under boost up top, when traditional low pressure system weaknesses are exposed. Lots of ways to do this with a reasonable budget, keeping things clean and simple.
 

Mikejones1208

Corporal
Dec 6, 2016
115
96
0
Savannah, GA
Ride
2009 BMW 335i
So i ended up mounting it directly underneath my fuel rail, post rail placement. Found a big threaded hole in the block and ended up having a bolt that matched, unfortunately needed to add a bunch of washers to space it away and clear the hpfp but the bolt still has over half the threads in The block and its mounted pretty solid! Also im able to get to it fairly easily with the manifold and everything in place for adjustments.

IMG_20190118_032139.jpg

IMG_20190118_040830.jpg
IMG_20190118_032128.jpg
IMG_20190118_040824.jpg
 

matreyia

Major
Apr 19, 2017
1,748
685
0
Ride
335i e93
Am I to understand that this device is to replace the fuel pressure regulator with the fuel filter on the driver side? what are the benefits of this unit?

Thanks.