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      07-08-2018, 10:14 AM   #23
MagnusT
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A higher flow LPFP should generate more "drive" to the passive jet pump so to me that sounds like a better solution than the Dinan reroute kit. If I've understood the starvation problem correct that is :-)


Anyone have any link tips?
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      07-08-2018, 10:21 AM   #24
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Quote:
Originally Posted by MagnusT View Post
A higher flow LPFP should generate more "drive" to the passive jet pump so to me that sounds like a better solution than the Dinan reroute kit. If I've understood the starvation problem correct that is :-)


Anyone have any link tips?
I would agree. I dealt with this issue early last year when there wasn’t really anyone else to bounce it off of, so went the Dinan route which has worked nicely. We’ll see soon how it competes with the HPFP under more power.

As for other options, I think you’re looking at stuff like this: http://www.fuel-it.com/bmw-f-series-...-lpfp-upgrade/
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      07-08-2018, 10:30 AM   #25
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Quote:
Originally Posted by ZM2 View Post
I would agree. I dealt with this issue early last year when there wasn’t really anyone else to bounce it off of, so went the Dinan route which has worked nicely. We’ll see soon how it competes with the HPFP under more power.

As for other options, I think you’re looking at stuff like this: http://www.fuel-it.com/bmw-f-series-...-lpfp-upgrade/
Thanks!
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      07-08-2018, 11:05 AM   #26
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This has been discussed at length. The HPFP is the issue, not the LPFP.
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      07-08-2018, 11:14 AM   #27
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There’s definitely confusion out there on this, so let’s try to make it more clear:

-If you get limp mode while pulling hard in gears 3-5 on a straight away, it’s the HPFP.

-If you get limp mode while pulling G’s around a corner and on 2/3 of a tank of fuel or lower, it’s the LPFP/saddle tank fuel pick up issue.
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      07-08-2018, 12:52 PM   #28
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Quote:
Originally Posted by ZM2 View Post
There’s definitely confusion out there on this, so let’s try to make it more clear:

-If you get limp mode while pulling hard in gears 3-5 on a straight away, it’s the HPFP.

-If you get limp mode while pulling G’s around a right hand corner and on 2/3 of a tank of fuel or lower, it’s the LPFP/saddle tank fuel pick up issue.
Yup
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      11-12-2018, 04:08 PM   #29
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I'm running a dinan stage 1 turbo, fuel it 450 lpfp, and meth. Still getting hpfp crash in WOT pulls. Is this tuning? Or am I missing something?

Log:

https://datazap.me/u/kayblasto55/log...19&mark=50
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      11-12-2018, 05:13 PM   #30
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You need to upgrade the HPFP
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      11-12-2018, 08:31 PM   #31
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Quote:
Originally Posted by EVEda235i View Post
I'm running a dinan stage 1 turbo, fuel it 450 lpfp, and meth. Still getting hpfp crash in WOT pulls. Is this tuning? Or am I missing something?

Log:

https://datazap.me/u/kayblasto55/log...a=3-19&mark=50
What's the capacity of your meth? From trim it doesn't look like you're using much ethanol. Stock HPFP + meth should handle the boost you're running no issue.
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      11-13-2018, 04:08 PM   #32
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Quote:
Originally Posted by SeanWRT View Post
Quote:
Originally Posted by EVEda235i View Post
I'm running a dinan stage 1 turbo, fuel it 450 lpfp, and meth. Still getting hpfp crash in WOT pulls. Is this tuning? Or am I missing something?

Log:

https://datazap.me/u/kayblasto55/log...19&mark=50
What's the capacity of your meth? From trim it doesn't look like you're using much ethanol. Stock HPFP + meth should handle the boost you're running no issue.
Quote:
Originally Posted by SeanWRT View Post
Quote:
Originally Posted by EVEda235i View Post
I'm running a dinan stage 1 turbo, fuel it 450 lpfp, and meth. Still getting hpfp crash in WOT pulls. Is this tuning? Or am I missing something?

Log:

https://datazap.me/u/kayblasto55/log...19&mark=50
What's the capacity of your meth? From trim it doesn't look like you're using much ethanol. Stock HPFP + meth should handle the boost you're running no issue.
I figured the same. Running the twisted tuning port injection meth kit. 200psi @ 1 GPM pump. Have 100% meth in the tank to try to combat the issue, but no luck. Also running 93 oct gas. Any ideas? :
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      11-16-2018, 12:58 AM   #33
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Quote:
Originally Posted by EVEda235i View Post
I figured the same. Running the twisted tuning port injection meth kit. 200psi @ 1 GPM pump. Have 100% meth in the tank to try to combat the issue, but no luck. Also running 93 oct gas. Any ideas? :
You're not seeing the perfect timing but fueling drop is none octane related. If you're sure meth is operating correctly, ask your tuner to lower the fuel compensation.
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      11-16-2018, 06:00 AM   #34
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Quote:
Originally Posted by SeanWRT View Post
Quote:
Originally Posted by EVEda235i View Post
I figured the same. Running the twisted tuning port injection meth kit. 200psi @ 1 GPM pump. Have 100% meth in the tank to try to combat the issue, but no luck. Also running 93 oct gas. Any ideas? :
You're not seeing the perfect timing but fueling drop is none octane related. If you're sure meth is operating correctly, ask your tuner to lower the fuel compensation.
Quote:
Originally Posted by SeanWRT View Post
Quote:
Originally Posted by EVEda235i View Post
I figured the same. Running the twisted tuning port injection meth kit. 200psi @ 1 GPM pump. Have 100% meth in the tank to try to combat the issue, but no luck. Also running 93 oct gas. Any ideas? :
You're not seeing the perfect timing but fueling drop is none octane related. If you're sure meth is operating correctly, ask your tuner to lower the fuel compensation.
Will do! Lets see what he says. Thank you
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      08-24-2019, 05:36 PM   #35
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Quote:
Originally Posted by bmw5sport View Post
Update to this issue. I switched out my ekpm with the Evolution of Speed BPM4 LPFP module. Solved the problem. The original ekpm doesn't supply enough amps to the lpfp to keep up. Starves the hpfp which make the car think the problem is the hpfp.
Very interesting. First post?! Please supply more info!
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      08-26-2019, 08:32 AM   #36
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Quote:
Originally Posted by bmw5sport View Post
Update to this issue. I switched out my ekpm with the Evolution of Speed BPM4 LPFP module. Solved the problem. The original ekpm doesn't supply enough amps to the lpfp to keep up. Starves the hpfp which make the car think the problem is the hpfp.

This should have it's own thread. I'm sure there would be interest.
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      10-25-2019, 03:09 PM   #37
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HPFP solution

Hi to everyone I've been posting this on multiple threads to help people with the issue of their HPFP. I think this will be the best solution for everyone moving ahead much cheaper than other fuel pumps that are out on the market and it is OEM so it will last. Watch this link and I think you'd be pleasantly surprised.


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      10-27-2019, 08:10 AM   #38
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Hi to everyone I've been posting this on multiple threads to help people with the issue of their HPFP. I think this will be the best solution for everyone moving ahead much cheaper than other fuel pumps that are out on the market and it is OEM so it will last. Watch this link and I think you'd be pleasantly surprised.


Disappointing they didn’t show how they modified the pump
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      10-27-2019, 08:33 AM   #39
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Is it a B58 HPFP right?
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      10-27-2019, 08:39 AM   #40
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Is it a B58 HPFP right?
I believe the Hpfp is difference in the supra to the BMW's
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      10-27-2019, 08:41 AM   #41
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Yes. Nothing showing what they did to the pump or the lines. Odd that they showed everything else but left out the most important part.
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      10-27-2019, 08:48 AM   #42
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Yes. Nothing showing what they did to the pump or the lines. Odd that they showed everything else but left out the most important part.
True but how hard is it to modify some few lines.. The bit that gets me thinking is how did they fit it to the vacuum pump.
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      10-27-2019, 09:40 AM   #43
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True but how hard is it to modify some few lines.. The bit that gets me thinking is how did they fit it to the vacuum pump.
How would you modify high preassure steel tubing? I'm assuming that's what they are?
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      10-27-2019, 11:05 AM   #44
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Quote:
Originally Posted by cecaa850 View Post
Quote:
Originally Posted by Ramon89 View Post
True but how hard is it to modify some few lines.. The bit that gets me thinking is how did they fit it to the vacuum pump.
How would you modify high preassure steel tubing? I'm assuming that's what they are?
You can always bend it with a hydraulic handheld bender the same way you bend air-conditioning pipework.. but I believe it's a very close fit so we would only need a small amount of tweaking.. The only issue is the electronic solenoid on the side it's on the opposite side for the supra. If you look at engines in a The new Z4/140i in photographs. You can see it's different on a New supra. So the supra definitely uses a different fuel pump..
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