[yoandry]

Guys,
I ordered finally PS2+DV+inlet.

Now, my question is about the supporting fuel. I want to run just more e85 for now, not to maximize ps2. My understanding is to upgrade just the lpfp? I see that fuel-it has stage 2 and stage 3 now. I think i'll be good with just the stage 2.

I normally run e40 with the trim around 40-45. How much E% I would be able to run with a safe trim on stg2 pump? Thanks

[Chicken_Joe]

You can run as much as you want but your HPFP won't be able to push a lot. That's why you need PI to usually maximize the potential of PS2

[yoandry]

Originally Posted by Chicken_Joe

You can run as much as you want but your HPFP won't be able to push a lot. That's why you need PI to usually maximize the potential of PS2

Yeah I know the HPFP wont keep up, but I'm not trying to maximize ps2 for now. Just want to know if it worth it the fuel-it st2 pump and whats the gain of it.

[Chicken_Joe]

Originally Posted by yoandry

Yeah I know the HPFP wont keep up, but I'm not trying to maximize ps2 for now. Just want to know if it worth it the fuel-it st2 pump and whats the gain of it.

Well if that's the case you I have gotten away with running like 8.5 gallons of pump E85 ( never tested mixture lol) and the rest 93 with the updated LPFP and haven't really had any issues with it

[yoandry]

Originally Posted by Chicken_Joe

Well if that's the case you I have gotten away with running like 8.5 gallons of pump E85 ( never tested mixture lol) and the rest 93 with the updated LPFP and haven't really had any issues with it

That's like e50 mmmm. I think I will just try stock pump first on e40 to see how ps2 do on map5, then upgrade and see the difference.

[Mike@N54Tuning.com]

Originally Posted by yoandry

Guys,
I ordered finally PS2+DV+inlet.

Now, my question is about the supporting fuel. I want to run just more e85 for now. My understanding is to upgrade just the lpfp? I see that fuel-it has stage 2 and stage 3 now. I think i'll be good with just the stage 2.

I normally run e40 with the trim around 40-45. How much E% I would be able to run with a safe trim on stg2 pump? Thanks

Thats gonna be fun

With e40 mixes the stage2 should be no problem.. Stage3 is really if starting to play with port injection, etc.

Mike

[yoandry]

Originally Posted by Mike@N54Tuning.com

Thats gonna be fun

With e40 mixes the stage2 should be no problem.. Stage3 is really if starting to play with port injection, etc.

Mike

But I run e40 on stock one with no problem(PWG). So with stg2 shouldn't I be running more? Like e50-e60? Otherwise is not worth the upgrade.

[JaredG_F30]

I have 2014 N55 EWG with the BMW fuel pump replaced under warranty and I’m having issues maintaining fuel pressure to redline with an E30 mix. The most I mix is E25 and the stock fuel system seems ok with that based on logs.

[yoandry]

Originally Posted by JaredG_F30

I have 2014 N55 EWG with the BMW fuel pump replaced under warranty and I’m having issues maintaining fuel pressure to redline with an E30 mix. The most I mix is E25 and the stock fuel system seems ok with that based on logs.

Yes, thats how pretty much all EWGs seems to hold, around e25. Not the same on PWG. But this is about ps2 with stage 2 fuel it lpfp.

[JaredG_F30]

Reading comprehension fail

Originally Posted by yoandry

Yes, thats how pretty much all EWGs seems to hold, around e25. Not the same on PWG. But this is about ps2 with stage 2 fuel it lpfp.

[Tchao]

Originally Posted by yoandry

But I run e40 on stock one with no problem(PWG). So with stg2 shouldn't I be running more? Like e50-e60? Otherwise is not worth the upgrade.

There little to gain in terms of octane moving from E40 to 50/60.

So if you’re not trying to squeeze every last drop from your PS2 then no it’s not worth it IMO. Just buy a Stage 3 pump if and when you’re ready.

[mike@x-ph.com]

Congrats OP!

Its all going to depend on how aggressive you are pushing your turbos. If you plan on staying close to E50 get a stage 2, datalog and see what would be the best mix in your case

[yoandry]

Originally Posted by Tchao

There little to gain in terms of octane moving from E40 to 50/60.

So if you’re not trying to squeeze every last drop from your PS2 then no it’s not worth it IMO. Just buy a Stage 3 pump if and when you’re ready.

Yeah, The stg3 is $600 and the st2 is not that bad for $300 i guess. For $600 I also can get the meth kit with the 3g steal tank, but Im not quite sure how hard is the meth integration and install.

Originally Posted by mike@x-ph.com

Congrats OP!

Its all going to depend on how aggressive you are pushing your turbos. If you plan on staying close to E50 get a stage 2, datalog and see what would be the best mix in your case

Thanks for the good deal. waiting for the shipping status, let me know.

[lens]

Originally Posted by yoandry

Guys,
I ordered finally PS2+DV+inlet.

Now, my question is about the supporting fuel. I want to run just more e85 for now, not to maximize ps2. My understanding is to upgrade just the lpfp? I see that fuel-it has stage 2 and stage 3 now. I think i'll be good with just the stage 2.

I normally run e40 with the trim around 40-45. How much E% I would be able to run with a safe trim on stg2 pump? Thanks

At this point, you should also grab a flash tune like BM3 as well. Once you upgrade the turbo, I find JB4 cannot fully maximize the turbo potential as you cannot control timings, AFR etc...

If you are mixing E85, the flash will take full advantage of the gas and you will be able to squeeze out all the power while having no timing retard.

I put down 400whp on 91 octane only, no E85 mix or meth or anything like that, with a non updated 91 oct OTS map, and I am AWD.

Since you are mixing E85, you can probably be easily in the 450whp+ range.

[yoandry]

Originally Posted by chaungo

At this point, you should also grab a flash tune like BM3 as well. Once you upgrade the turbo, I find JB4 cannot fully maximize the turbo potential as you cannot control timings, AFR etc...

If you are mixing E85, the flash will take full advantage of the gas and you will be able to squeeze out all the power while having no timing retard.

I put down 400whp on 91 octane only, no E85 mix or meth or anything like that, with a non updated 91 oct OTS map, and I am AWD.

Since you are mixing E85, you can probably be easily in the 450whp+ range.

Thats tempting I know, but Bm3 will cost me another what? $600 with no custom map That's on the future for sure, heck I'm going to MPI shop to get install all that + new spark plugs and while im there get the DME also unlock.

And I'm trying to see if its worth the fuel-it stage 2 lpfp upgrade SO another $400 + throw it on the install list.

[BimmerFan]

Originally Posted by chaungo

At this point, you should also grab a flash tune like BM3 as well. Once you upgrade the turbo, I find JB4 cannot fully maximize the turbo potential as you cannot control timings, AFR etc...

If you are mixing E85, the flash will take full advantage of the gas and you will be able to squeeze out all the power while having no timing retard.

I put down 400whp on 91 octane only, no E85 mix or meth or anything like that, with a non updated 91 oct OTS map, and I am AWD.

Since you are mixing E85, you can probably be easily in the 450whp+ range.

What he said. I put down 411whp and 414 wtq straight 93 octane with nothing else with my Pure stage 2 turbo. No tune, just JB4 and with stage 2 LPFP. With E30 (the sweet spot for EWG cars) you might be able to squeeze out a little more. Now, with PI and E60, you are for sure in the 500whp and torque club with FBO of course. A good custom tune will get you those numbers with way less boost!

[yoandry]

Originally Posted by BimmerFan

What he said. I put down 411whp and 414 wtq straight 93 octane with nothing else with my Pure stage 2 turbo. No tune, just JB4 and with stage 2 LPFP. With E30 (the sweet spot for EWG cars) you might be able to squeeze out a little more. Now, with PI and E60, you are for sure in the 500whp and torque club with FBO of course. A good custom tune will get you those numbers with way less boost!

So you put down those numbers with 93 and jb4? and Chaungo 400 with bm3 and 91? Seems the same to me. Thats why Im going to try jb4 first on st2 lpfp+e40-e60 whatever is the sweet spot on E% then bm3 with the same setup and see the difference.

[lens]

Originally Posted by yoandry

So you put down those numbers with 93 and jb4? and Chaungo 400 with bm3 and 91? Seems the same to me. Thats why Im going to try jb4 first on st2 lpfp+e40-e60 whatever is the sweet spot on E% then bm3 with the same setup and see the difference.

Nothing near the same, he has more octane and way better knock resisitance. Not to mention im awd so more drivetrain lost.

I am doing the almost the same power with shitter gas on lower boost levels consistently. Again JB4 requires octane to work correctly, flash tune works with whatever gas you have.

[SeanWRT]

Originally Posted by yoandry

Yeah I know the HPFP wont keep up, but I'm not trying to maximize ps2 for now. Just want to know if it worth it the fuel-it st2 pump and whats the gain of it.

I don't like throwing horsepower numbers without a stock base line. What I have to tell is that Pump gas and 17-18psi at mid-high rev range are already maxing out HPFP.

In reality, it's very rare to see lpfp failing to keep up. Without meth, you'll be always looking at HPFP prior to LPFP.

[enemigo13]

it depends on requested lambda also, if you will run richier than 0.84-0.85 you will max out hpfp earlier.

Originally Posted by SeanWRT

I don't like throwing horsepower numbers without a stock base line. What I have to tell is that Pump gas and 17-18psi at mid-high rev range are already maxing out HPFP.

In reality, it's very rare to see lpfp failing to keep up. Without meth, you'll be always looking at HPFP prior to LPFP.

[BimmerFan]

Originally Posted by chaungo

Nothing near the same, he has more octane and way better knock resisitance. Not to mention im awd so more drivetrain lost.

I am doing the almost the same power with shitter gas on lower boost levels consistently. Again JB4 requires octane to work correctly, flash tune works with whatever gas you have.

True, flash tune wins over piggy-back any day. My mod journey started way before DME unlock and flash tunes were available for our cars. If I just bought my car yesterday and after FBO, I would go PS2 turbo, PTF tune, stage 2 lpfp and call it a day...for a while . I currently have a PTF 93 octane only custom tune(JB4 off, no PI ~16 PSI). I run this tune during the week for my 100 mile two way commute for work. Figured ~400 whp is plenty for my daily commute . Just about finished with a custom BEF from PTF( JB4 Map 6, E60 + PI, ~ 19-23 PSI). This will be my weekend warrior tune.

[lens]

Originally Posted by BimmerFan

True, flash tune wins over piggy-back any day. My mod journey started way before DME unlock and flash tunes were available for our cars. If I just bought my car yesterday and after FBO, I would go PS2 turbo, PTF tune, stage 2 lpfp and call it a day...for a while . I currently have a PTF 93 octane only custom tune(JB4 off, no PI ~16 PSI). I run this tune during the week for my 100 mile two way commute for work. Figured ~400 whp is plenty for my daily commute . Just about finished with a custom BEF from PTF( JB4 Map 6, E60 + PI, ~ 19-23 PSI). This will be my weekend warrior tune.

I only have access to 91 octane in my area so I run the updated 91 oct PS2 OTS map, I believe it should be more than 400whp as the map I used to dyno was on OEM stock gap plugs with a OTS map that was just sent to me to log, but I didn't have time. I currently have a 91 and 93 OTS map that were both perfected through probably 30 logs each sent back and forth.


The map was pulling timing (barely running 91 oct timing) and I still managed to put down 400whp

I ran a test 1/4 mile on Torque pro and a OBDII reader and managed to run 12.1 @ 116mph.