LPFP Actual Raw Psi (what is your number?)

13blk335ix · 07-26-2019, 12:02 AM

my stock lpfp is always at 72. i have upgraded xdi 35 hpfp. i experiance a stutter in wot. i have been dealing with this stutter since the first time i tuned my car with bm3. i have done all that bm3 has suggested, spark plugs gapped correctly, new ignition coils, ER cp, wagner catless downpipe, intercooler, drop in air filter and resonator delete. bm3 said my stock hpfp was crashing so i upgraded to xdi 35, problem still persists so it leads me to beleive my stock lpfp cannot keep up this entire time.

looking for insight on your readings of lpfp actual raw psi, and what number that should be to handle the boost and tune on my car.

i have a 2013 f30 n55 335ix 6mt.

here are logs with xdi 35 installed

http://www.bootmod3.net/log?id=5d3a575cc090c65e9f4f92b3

http://www.bootmod3.net/log?id=5d3a572fc090c65e9f4f92b2

here are older logs before xdi with stock hpfp

http://www.bootmod3.net/log?id=5d10a304ae729b165fa4f46f

http://www.bootmod3.net/log?id=5d10a374ae729b165fa4f472

http://www.bootmod3.net/log?id=5d10a360ae729b165fa4f471

this build will eventually have a ps2. please offer insight on this issue, at this point i wish i just upgraded lpfp first and went from there. i have followed bm3 guidance through this to no avail so far.

i have been looking at the stage 2 lpfp from fuel it but have heard of over heating issues with the ekp. wondering how common that is or if anyone has had that issue. i know there is a ekp upgrade. also there is a stage 3 option with new lpfp and a walboro lpfp on the other side so two in the tank pumping. this sounds like a good option but am curious as to how reliable it is. thanks.

bdragon46 · 07-26-2019, 06:41 AM

I've had experience with upgrading to a stage 2 lpfp(not fuel-it). Overheating is a major issue, ekp and other electrical. I'm back to stock for now until I figure out something that'll work. Fuel-it claims the stage 3 does not put strain on the electrical system. I'd say that's your best bet

Boostinwithfish · 05-13-2020, 01:44 AM

Quote:

Originally Posted by 13blk335ix

my stock lpfp is always at 72. i have upgraded xdi 35 hpfp. i experiance a stutter in wot. i have been dealing with this stutter since the first time i tuned my car with bm3. i have done all that bm3 has suggested, spark plugs gapped correctly, new ignition coils, ER cp, wagner catless downpipe, intercooler, drop in air filter and resonator delete. bm3 said my stock hpfp was crashing so i upgraded to xdi 35, problem still persists so it leads me to beleive my stock lpfp cannot keep up this entire time.

looking for insight on your readings of lpfp actual raw psi, and what number that should be to handle the boost and tune on my car.

i have a 2013 f30 n55 335ix 6mt.

here are logs with xdi 35 installed

http://www.bootmod3.net/log?id=5d3a575cc090c65e9f4f92b3

http://www.bootmod3.net/log?id=5d3a572fc090c65e9f4f92b2

here are older logs before xdi with stock hpfp

http://www.bootmod3.net/log?id=5d10a304ae729b165fa4f46f

http://www.bootmod3.net/log?id=5d10a374ae729b165fa4f472

http://www.bootmod3.net/log?id=5d10a360ae729b165fa4f471

this build will eventually have a ps2. please offer insight on this issue, at this point i wish i just upgraded lpfp first and went from there. i have followed bm3 guidance through this to no avail so far.

i have been looking at the stage 2 lpfp from fuel it but have heard of over heating issues with the ekp. wondering how common that is or if anyone has had that issue. i know there is a ekp upgrade. also there is a stage 3 option with new lpfp and a walboro lpfp on the other side so two in the tank pumping. this sounds like a good option but am curious as to how reliable it is. thanks.

This is happening to me now and I just installed my HPFP every time I floor it stutters/sputter. My car has Ps2 and it's on 93. Stock LPFP. Did you find a fix ?

akgambino · 05-13-2020, 10:06 AM

Quote:

Originally Posted by Boostinwithfish

Quote:

Originally Posted by 13blk335ix

my stock lpfp is always at 72. i have upgraded xdi 35 hpfp. i experiance a stutter in wot. i have been dealing with this stutter since the first time i tuned my car with bm3. i have done all that bm3 has suggested, spark plugs gapped correctly, new ignition coils, ER cp, wagner catless downpipe, intercooler, drop in air filter and resonator delete. bm3 said my stock hpfp was crashing so i upgraded to xdi 35, problem still persists so it leads me to beleive my stock lpfp cannot keep up this entire time.

looking for insight on your readings of lpfp actual raw psi, and what number that should be to handle the boost and tune on my car.

i have a 2013 f30 n55 335ix 6mt.

here are logs with xdi 35 installed

http://www.bootmod3.net/log?id=5d3a575cc090c65e9f4f92b3

http://www.bootmod3.net/log?id=5d3a572fc090c65e9f4f92b2

here are older logs before xdi with stock hpfp

http://www.bootmod3.net/log?id=5d10a304ae729b165fa4f46f

http://www.bootmod3.net/log?id=5d10a374ae729b165fa4f472

http://www.bootmod3.net/log?id=5d10a360ae729b165fa4f471

this build will eventually have a ps2. please offer insight on this issue, at this point i wish i just upgraded lpfp first and went from there. i have followed bm3 guidance through this to no avail so far.

i have been looking at the stage 2 lpfp from fuel it but have heard of over heating issues with the ekp. wondering how common that is or if anyone has had that issue. i know there is a ekp upgrade. also there is a stage 3 option with new lpfp and a walboro lpfp on the other side so two in the tank pumping. this sounds like a good option but am curious as to how reliable it is. thanks.

This is happening to me now and I just installed my HPFP every time I floor it stutters/sputter. My car has Ps2 and it's on 93. Stock LPFP. Did you find a fix ?

This guys clutch was slipping.

Boostinwithfish · 05-13-2020, 11:32 AM

Quote:

Originally Posted by akgambino

Quote:

Originally Posted by Boostinwithfish

Quote:

Originally Posted by 13blk335ix

my stock lpfp is always at 72. i have upgraded xdi 35 hpfp. i experiance a stutter in wot. i have been dealing with this stutter since the first time i tuned my car with bm3. i have done all that bm3 has suggested, spark plugs gapped correctly, new ignition coils, ER cp, wagner catless downpipe, intercooler, drop in air filter and resonator delete. bm3 said my stock hpfp was crashing so i upgraded to xdi 35, problem still persists so it leads me to beleive my stock lpfp cannot keep up this entire time.

looking for insight on your readings of lpfp actual raw psi, and what number that should be to handle the boost and tune on my car.

i have a 2013 f30 n55 335ix 6mt.

here are logs with xdi 35 installed

http://www.bootmod3.net/log?id=5d3a575cc090c65e9f4f92b3

http://www.bootmod3.net/log?id=5d3a572fc090c65e9f4f92b2

here are older logs before xdi with stock hpfp

http://www.bootmod3.net/log?id=5d10a304ae729b165fa4f46f

http://www.bootmod3.net/log?id=5d10a374ae729b165fa4f472

http://www.bootmod3.net/log?id=5d10a360ae729b165fa4f471

this build will eventually have a ps2. please offer insight on this issue, at this point i wish i just upgraded lpfp first and went from there. i have followed bm3 guidance through this to no avail so far.

i have been looking at the stage 2 lpfp from fuel it but have heard of over heating issues with the ekp. wondering how common that is or if anyone has had that issue. i know there is a ekp upgrade. also there is a stage 3 option with new lpfp and a walboro lpfp on the other side so two in the tank pumping. this sounds like a good option but am curious as to how reliable it is. thanks.

This is happening to me now and I just installed my HPFP every time I floor it stutters/sputter. My car has Ps2 and it's on 93. Stock LPFP. Did you find a fix ?

This guys clutch was slipping.

Nah my clutch ain't slipping I a stage 3+ clutch in mine

akgambino · 05-13-2020, 11:33 AM

Quote:

Originally Posted by Boostinwithfish

Quote:

Originally Posted by akgambino

Quote:

Originally Posted by Boostinwithfish

Quote:

Originally Posted by 13blk335ix

my stock lpfp is always at 72. i have upgraded xdi 35 hpfp. i experiance a stutter in wot. i have been dealing with this stutter since the first time i tuned my car with bm3. i have done all that bm3 has suggested, spark plugs gapped correctly, new ignition coils, ER cp, wagner catless downpipe, intercooler, drop in air filter and resonator delete. bm3 said my stock hpfp was crashing so i upgraded to xdi 35, problem still persists so it leads me to beleive my stock lpfp cannot keep up this entire time.

looking for insight on your readings of lpfp actual raw psi, and what number that should be to handle the boost and tune on my car.

i have a 2013 f30 n55 335ix 6mt.

here are logs with xdi 35 installed

http://www.bootmod3.net/log?id=5d3a575cc090c65e9f4f92b3

http://www.bootmod3.net/log?id=5d3a572fc090c65e9f4f92b2

here are older logs before xdi with stock hpfp

http://www.bootmod3.net/log?id=5d10a304ae729b165fa4f46f

http://www.bootmod3.net/log?id=5d10a374ae729b165fa4f472

http://www.bootmod3.net/log?id=5d10a360ae729b165fa4f471

this build will eventually have a ps2. please offer insight on this issue, at this point i wish i just upgraded lpfp first and went from there. i have followed bm3 guidance through this to no avail so far.

i have been looking at the stage 2 lpfp from fuel it but have heard of over heating issues with the ekp. wondering how common that is or if anyone has had that issue. i know there is a ekp upgrade. also there is a stage 3 option with new lpfp and a walboro lpfp on the other side so two in the tank pumping. this sounds like a good option but am curious as to how reliable it is. thanks.

This is happening to me now and I just installed my HPFP every time I floor it stutters/sputter. My car has Ps2 and it's on 93. Stock LPFP. Did you find a fix ?

This guys clutch was slipping.

Nah my clutch ain't slipping I a stage 3+ clutch in mine

Ok, was just noting that the guy you quoted had a slipping clutch.

harkes · 05-14-2020, 08:58 PM

F-series does not have a LPFP sensor. What ever you read in your logs is phantom data.

Running 93 on PS2 the LPFP is plenty. Even E-mixes is ok so you must have another issue.

2-3 years ago "everyone" believed the LPFP to be the fueling bottle neck - it is not. Not even with upgraded HPFP (but good business for Fuel-It)

n55david · 05-14-2020, 09:44 PM

Quote:

Originally Posted by harkes

F-series does not have a LPFP sensor. What ever you read in your logs is phantom data.

Running 93 on PS2 the LPFP is plenty. Even E-mixes is ok so you must have another issue.

2-3 years ago "everyone" believed the LPFP to be the fueling bottle neck - it is not. Not even with upgraded HPFP (but good business for Fuel-It)

this and a ton of people with lpfp have had lots and lots of issues

07-26-2019, 12:02 AM	#1
13blk335ix First Lieutenant 75 Rep 323 Posts Drives: 2013 BMW F30 N55 335ix 6mt Join Date: Feb 2019 Location: New York iTrader: (0) Garage List 2013 BMW 335ix [0.00]	LPFP Actual Raw Psi (what is your number?) my stock lpfp is always at 72. i have upgraded xdi 35 hpfp. i experiance a stutter in wot. i have been dealing with this stutter since the first time i tuned my car with bm3. i have done all that bm3 has suggested, spark plugs gapped correctly, new ignition coils, ER cp, wagner catless downpipe, intercooler, drop in air filter and resonator delete. bm3 said my stock hpfp was crashing so i upgraded to xdi 35, problem still persists so it leads me to beleive my stock lpfp cannot keep up this entire time. looking for insight on your readings of lpfp actual raw psi, and what number that should be to handle the boost and tune on my car. i have a 2013 f30 n55 335ix 6mt. here are logs with xdi 35 installed http://www.bootmod3.net/log?id=5d3a575cc090c65e9f4f92b3 http://www.bootmod3.net/log?id=5d3a572fc090c65e9f4f92b2 here are older logs before xdi with stock hpfp http://www.bootmod3.net/log?id=5d10a304ae729b165fa4f46f http://www.bootmod3.net/log?id=5d10a374ae729b165fa4f472 http://www.bootmod3.net/log?id=5d10a360ae729b165fa4f471 this build will eventually have a ps2. please offer insight on this issue, at this point i wish i just upgraded lpfp first and went from there. i have followed bm3 guidance through this to no avail so far. i have been looking at the stage 2 lpfp from fuel it but have heard of over heating issues with the ekp. wondering how common that is or if anyone has had that issue. i know there is a ekp upgrade. also there is a stage 3 option with new lpfp and a walboro lpfp on the other side so two in the tank pumping. this sounds like a good option but am curious as to how reliable it is. thanks.
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07-26-2019, 06:41 AM	#2
bdragon46 Private 23 Rep 73 Posts Drives: 2013 F30 335i Join Date: Jan 2018 Location: Palm Beach, FL iTrader: (0)	I've had experience with upgrading to a stage 2 lpfp(not fuel-it). Overheating is a major issue, ekp and other electrical. I'm back to stock for now until I figure out something that'll work. Fuel-it claims the stage 3 does not put strain on the electrical system. I'd say that's your best bet
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05-14-2020, 08:58 PM	#7
harkes Colonel 1077 Rep 2,357 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	F-series does not have a LPFP sensor. What ever you read in your logs is phantom data. Running 93 on PS2 the LPFP is plenty. Even E-mixes is ok so you must have another issue. 2-3 years ago "everyone" believed the LPFP to be the fueling bottle neck - it is not. Not even with upgraded HPFP (but good business for Fuel-It) __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
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