[Hunter3]

Still waiting not so patiently for my PS2 to get shipped to my house so I'm just on here looking around seeing if there's anything else I need before the install. The one other thing I'm looking at is a fuel upgrade. Is a LPFP even necessary ? I've seen yes and no answers. But a constant I have seen is that almost all upgrade the HPFP... if so what are you guys running ? And how much more boost will this allow over the stock one ? Is it absolutely necessary to upgrade the HPFP ?

[TunafishE93]

Mainly its the people running high levels of ethanol. The ethanol requires more fuel to burn properly which is why sometimes the pumps cant keep up.

While high boost and ethanol are a common set up. The boost is not the determining factor if you will need upgraded pumps, the ethanol is.

[Turbod]

HPFP is the first limit you'll run into. If you're wanting to run ethanol at or past E30 on the PS2 then a LPFP might make sense. If you're running pump fuel or E30 and less then a HPFP should be more than enough.

[Hunter3]

@Turbod for the most part I'll be running 93 pump gas.. I have a gas station near by that sells E and it could be an option but I doubt I'd go do it that often so what do you suggest for that scenario ?

[anjuna]

Originally Posted by Hunter3

@Turbod for the most part I'll be running 93 pump gas.. I have a gas station near by that sells E and it could be an option but I doubt I'd go do it that often so what do you suggest for that scenario ?

What numbers are you shooting for??

If only on 93 and ps2, i'd do a lpfp and meth

[Turbod]

Originally Posted by Hunter3

@Turbod for the most part I'll be running 93 pump gas.. I have a gas station near by that sells E and it could be an option but I doubt I'd go do it that often so what do you suggest for that scenario ?

Really depends on your power goals. Running 93 only on the PS2 is nice but there is so much more with methanol or ethanol. I am running a PS2 on 92 octane and methanol and still having fuel system crashes around 17psi. The newer style HPFP just isn't as capable as the older one. If I hadn't already maxed out the PS2 on my last car then I would want to see what the turbo can do. I think if I were in your situation I'd most likely upgrade the HPFP, install a methanol kit, and run an E30 mix. If you run into the new HPFP crashing then look to replace the LPFP.

If you don't like the idea of methanol then just run the E30 mix.

[jlegelis]

2013 E92s have lower capacity HPFPs than earlier builds - they were redesigned in response to earlier failures, but flow less (the LPFP is not a problem unless you're trying to make 500+HP). My HPFP couldn't handle the stock turbo at 20psi without the rail pressure crashing and 'engine malfunction' errors being thrown. I went with an XDI and it's been solid.

Have you already maxed out the stock Turbo with a Stage 2+ tune? In my experience there's no way a late E92 HPFP can properly fuel a PS2 - you need an XDI or Dorch pump. Also you'll need an N20 sensor, cooler plugs, etc. Good luck.

[Hunter3]

@anjuna I'm not specifically trying to hit any kind of numbers per say just trying to get the most out of it without getting too crazy. When I messaged pure they told me 450-500 whp on just 93 but suggested e30 mixes idk how close I'll get to that on just 93 gas but I guess we'll see

[Hunter3]

@Turbod since this is my daily for now installing a meth kit and all of that sounds nice in theory but I wana keep it relatively simple. Don't get me wrong I want the most out of the thing but Idt meth would be the way to go for me. For the most part I'll just be running 93 I believe. So that being said is there any reason to upgrade the hpfp or is the only reason to do that is to run higher levels of E85 ? E85 isn't completely out of the question because how I stated before I have a station near me that sells it but it would be a once in a while type deal not every fill up. So I'm just wondering if I were to only do e85 mixes every once in a while is the HPFP enough on its own to allow that ?

[Hunter3]

@jlegelis thanks for the input ! I have a flash tune from RK tunes that is similar to an mhd stage 2 + so I'm assuming it is very close to maxing out the turbo with that tune. As I stated earlier I'll mostly be running 93, this is my daily driver at least in the colder weather when I'm not on my motorcycle so I want to keep it somewhat simple. Is a HPFP only necessary when running E85 mixes or will it also help perform with better numbers on 93 as well ? Kind of stuck in a hard place because I probably won't run E85 mixes nearly as much as just regular 93 gas so I'm not sure what to do here really

[Turbod]

Originally Posted by Hunter3

@Turbod since this is my daily for now installing a meth kit and all of that sounds nice in theory but I wana keep it relatively simple. Don't get me wrong I want the most out of the thing but Idt meth would be the way to go for me. For the most part I'll just be running 93 I believe. So that being said is there any reason to upgrade the hpfp or is the only reason to do that is to run higher levels of E85 ? E85 isn't completely out of the question because how I stated before I have a station near me that sells it but it would be a once in a while type deal not every fill up. So I'm just wondering if I were to only do e85 mixes every once in a while is the HPFP enough on its own to allow that ?

With the newer version of the HPFP you will run into a fueling limit on pump gas with a larger turbo. This will cause the tuner to need to add more timing for power and keeping boost lower than if you had a better HPFP. I have had a meth kit on my BMWs for 7 years and they were my DDs. Your decision to make though. What I like about methanol is it adds more octane and fueling so it actually takes a slight bit of stain off the fuel system. With a decent intercooler you will never have to worry about power loss due to IATs.

Since you already have the PS2 on order you don't really have the luxury of waiting for more data to be shared about the 800. I think the PS2 is a great option for people that aren't looking for the most power. The spool is acceptable, you get power until redline, the reliability is the same as the stock unit, ect. My V2 would hold about 23psi until redline. The V3 is slightly larger so I assume there may be a little more in it.

I wont be pulling the PS2 off for the 800. Part of the reason in my case is probably the fact that I have it on an X1. I am excited to see it come out and what people are able to due with it. I might get a used 135i in a year or two and mess around with it.

[Hunter3]

@Turbod I always appreciate your answer my man they're always helpful and informative. You're absolutely right I'm not looking for an absolute monster on the drag strip but something I can certainly have fun in more than I already do. The 500 awhp number seems like a good and obtainable goal for now. With that being said if you're telling me and please correct me if I'm wrong. The HPFP will help even with just 93 gas to run a little higher boost better timing and also give me the option to run E. So i seems like a no brainer to pick one up even though they are crazy expensive as I've been researching. Also if you ever build a 135 with a pure 800 would love to see a build series from you on here!

[Turbod]

Originally Posted by Hunter3

@Turbod I always appreciate your answer my man they're always helpful and informative. You're absolutely right I'm not looking for an absolute monster on the drag strip but something I can certainly have fun in more than I already do. The 500 awhp number seems like a good and obtainable goal for now. With that being said if you're telling me and please correct me if I'm wrong. The HPFP will help even with just 93 gas to run a little higher boost better timing and also give me the option to run E. So i seems like a no brainer to pick one up even though they are crazy expensive as I've been researching. Also if you ever build a 135 with a pure 800 would love to see a build series from you on here!

You will run into the limit of the HPFP on pump gas with a PS2 or larger turbo. What I was getting at is that you can tune around this by finding that limit, back off the boost a little bit so that you have some head room for overboost during shifts, and add some more timing to make up for running lower boost levels.

Since I haven't upgraded the HPFP I don't have much to offer about going that route. I would absolutely stick to direct injection rather than adding port injection and a second controller though.

Thanks for the kind words.

[Hunter3]

@Turbod in terms of power numbers do you have any estimate in awhp numbers fbo stage 2 turbo with 93 gas vs the same with the upgrade hpfp ? Just curious how much more boost you can make with the upgrade and what kind of power that will actually add with just pump gas

[Turbod]

Originally Posted by Hunter3

@Turbod in terms of power numbers do you have any estimate in awhp numbers fbo stage 2 turbo with 93 gas vs the same with the upgrade hpfp ? Just curious how much more boost you can make with the upgrade and what kind of power that will actually add with just pump gas

On the older style HPFP people were octane limited around that 430whp number. AWHP is a little lower but then it depends on DA, dyno, ect. I haven't ran an upgraded HPFP so I'm not sure what people are able to do with the upgrade.