What is the EWG HPFP fuelling limit?

bradsm87 · 02-21-2018, 05:24 PM

I understand the cam lobe operated single piston HPFP reaches its limit at a lower output than the early model HPFP.

Does anyone have lots of near-maxing their HPFP on an EWG N55?

Is PS2 running 18psi at redline on E25 fuel with a 12.3:1 AFR too optimistic?

yoandry · 02-21-2018, 06:36 PM

Quote:

Originally Posted by bradsm87

I understand the cam lobe operated single piston HPFP reaches its limit at a lower output than the early model HPFP.

Does anyone have lots of near-maxing their HPFP on an EWG N55?

Is PS2 running 18psi at redline on E25 fuel with a 12.3:1 AFR too optimistic?

Dont know if hpfp are different from PWG and EWG, but my pwg with ps2 + 93 will do around 8-10 hpfp values on 17psi. Anything over will crash down to 5 which is the safe fail for jb4. My afr start at 13 in low rpms and goes to 11 at the redline but Im on MHD bef also. I thing 16psi is the sweet spot for PS2 on stock fuel
So putting e25 will be worst.

SeanWRT · 02-21-2018, 08:22 PM

Many people think early model (PWG) has a better HPFP, think again.

I know from real world experience that late model EWG HPFP is noticeably stronger. I am not talking about isolated case.

obriennathaniel · 02-21-2018, 08:31 PM

My HPFP on my PWG allowed me to run e60, hardly any other car has been capable of that.

yoandry · 02-21-2018, 08:40 PM

Quote:

Originally Posted by obriennathaniel

My HPFP on my PWG allowed me to run e60, hardly any other car has been capable of that.

On stock turbo right? Cuz on PS2 I can only do around 16 with just 93

obriennathaniel · 02-21-2018, 08:43 PM

Quote:

Originally Posted by yoandry

Quote:

Originally Posted by obriennathaniel

My HPFP on my PWG allowed me to run e60, hardly any other car has been capable of that.

On stock turbo right? Cuz on PS2 I can only do around 16 with just 93

No that was with PS2. Didn't get PI until about 7 months later. Been running full e85 ever since I got PI

FSociety · 02-21-2018, 08:45 PM

yoandry you should try on stock flash with JB4 and see if it lets you run more boost or more E

bradsm87 · 02-21-2018, 09:05 PM

Quote:

Originally Posted by yoandry

Dont know if hpfp are different from PWG and EWG

They are

Quote:

Originally Posted by SeanWRT

Many people think early model (PWG) has a better HPFP, think again.

I know from real world experience that late model EWG HPFP is noticeably stronger. I am not talking about isolated case.

Stronger in what way? I know they're more reliable but I've always heard they have a lower flow limit.

Quote:

Originally Posted by obriennathaniel

My HPFP on my PWG allowed me to run e60, hardly any other car has been capable of that.

That's completely dependent on how much boost and what turbo etc. How much ethanol is only one piece to the puzzle.

Quote:

Originally Posted by FSociety

yoandry you should try on stock flash with JB4 and see if it lets you run more boost or more E

Joking surely? That's a terrible idea.

yoandry · 02-21-2018, 09:23 PM

Quote:

Originally Posted by obriennathaniel

No that was with PS2. Didn't get PI until about 7 months later. Been running full e85 ever since I got PI

@ what psi? or maybe because your afr was way leaner.

Quote:

Originally Posted by FSociety

yoandry you should try on stock flash with JB4 and see if it lets you run more boost or more E

I was on stock flash with just jb4 and yes I could hit 20psi with no crash but afr running to lean, thats why, so MHD bef put it back at 12.

Stanio · 02-21-2018, 09:30 PM

Mine is 2014 and my HPFP was fed up with my constant pulls ..I guess.
On the drag strip I experienced couple of dead spots both in rpm and speed which resulted in a lower trap. That was later on confirmed when the the car was logged.
Fortunately the N55 community will have something soon to address the issue.
Have no clue about PS2...still on stock turbo.

harkes · 02-21-2018, 09:52 PM

Quote:

Originally Posted by bradsm87

I understand the cam lobe operated single piston HPFP reaches its limit at a lower output than the early model HPFP.

Does anyone have lots of near-maxing their HPFP on an EWG N55?

Is PS2 running 18psi at redline on E25 fuel with a 12.3:1 AFR too optimistic?

Short answer... 16-17psi with ~12.5 AFR on 100% petrol. My PWG car is ok at 16 - crashes at 17. Blending in ethanol = more volume = less boost for same lambda, but the gain in timing is worth it.

bradsm87 · 02-21-2018, 11:26 PM

Quote:

Originally Posted by harkes

Short answer... 16-17psi with ~12.5 AFR on 100% petrol. My PWG car is ok at 16 - crashes at 17. Blending in ethanol = more volume = less boost for same lambda, but the gain in timing is worth it.

Thanks. Agreed regarding a bit less boost and lots more timing with a bit of ethanol. Yeah that's about what I expected. That's fine with me. I might stick to 15% ethanol and aim for 17psi tapering to 15 at redline.

FSociety · 02-21-2018, 11:37 PM

Quote:

Originally Posted by yoandry

I was on stock flash with just jb4 and yes I could hit 20psi with no crash but afr running to lean, thats why, so MHD bef put it back at 12.

Ah makes sense, you mean BMS BEF via MHD

Btw, did u try Race-Gas/Torco/Boostane/NOS (Octane Boosters) instead of E ?

yoandry · 02-22-2018, 08:45 AM

Quote:

Originally Posted by FSociety

Ah makes sense, you mean BMS BEF via MHD

Btw, did u try Race-Gas/Torco/Boostane/NOS (Octane Boosters) instead of E ?

After ps2 installed I haven't try anything else than 93 because on my understanding, that will stress more the hpfp and make it worst.
Now, one time I get meth then I can put some e85 or race gas as the phfp will have the support from meth.

obriennathaniel · 02-23-2018, 02:04 AM

Quote:

Originally Posted by yoandry

Quote:

Originally Posted by obriennathaniel

No that was with PS2. Didn't get PI until about 7 months later. Been running full e85 ever since I got PI

@ what psi? or maybe because your afr was way leaner.

Quote:

Originally Posted by FSociety

yoandry you should try on stock flash with JB4 and see if it lets you run more boost or more E

I was on stock flash with just jb4 and yes I could hit 20psi with no crash but afr running to lean, thats why, so MHD bef put it back at 12.

21-22 psi. I could manage 24 but it was clearly dangerous. And yea I was running lean but it never caused any issues. I actually had better results and less issues running on the leaner side than richer side. But also those AFR's might not have been accurate because this was jb4 and basic tuning so the afr scaling was off due to the e content.

I'm working with CaryTheLabelGuy now on an E85 tune that will maximize the the HPFP to the best of its abilities and supplemented with PI.

02-21-2018, 05:24 PM	#1
bradsm87 Lieutenant Colonel 592 Rep 1,693 Posts Drives: F25 LCI xDrive30d Join Date: Jun 2013 Location: Australia iTrader: (0)	What is the EWG HPFP fuelling limit? I understand the cam lobe operated single piston HPFP reaches its limit at a lower output than the early model HPFP. Does anyone have lots of near-maxing their HPFP on an EWG N55? Is PS2 running 18psi at redline on E25 fuel with a 12.3:1 AFR too optimistic?
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02-21-2018, 08:22 PM	#3
SeanWRT Colonel 3179 Rep 2,577 Posts Drives: E90 M3 & F87 M2 Join Date: Sep 2015 Location: Shanghai iTrader: (1)	Many people think early model (PWG) has a better HPFP, think again. I know from real world experience that late model EWG HPFP is noticeably stronger. I am not talking about isolated case. __________________ Lemania 2320
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02-21-2018, 08:31 PM	#4
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02-21-2018, 09:30 PM	#10
Stanio Private 67 Rep 64 Posts Drives: F30 335 2014 Xdrive Join Date: Sep 2017 Location: Baltimore MD iTrader: (0)	Mine is 2014 and my HPFP was fed up with my constant pulls ..I guess. On the drag strip I experienced couple of dead spots both in rpm and speed which resulted in a lower trap. That was later on confirmed when the the car was logged. Fortunately the N55 community will have something soon to address the issue. Have no clue about PS2...still on stock turbo.
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