08-03-2020, 10:03 PM | #1 |
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Stock turbo XDI 35 map question
Hey so I have every basic bolt on through ER and Dinan, but a stock PWG turbo. At the moment I'm using BM3 stage 2 93 Agg tune with my PR coil set. I have reached out to Jordan and F80 Paul in regards to a custom map. J got back to me saying I can make about 420 wheel with an upgraded fuel pump and was just wondering what anyone else is making on a similar set up. I do have an XDI 35 that I'm going to install soon. Side note the only e85 station near me is 30mins away. Could I possibly max the stock turbo out ? Anything I google is paired with PS2 so I'm at a loss there and decided to come here.
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08-03-2020, 11:40 PM | #2 |
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He said you can make 420whp with PWG? That seems a bit high... even for a custom tune on E. Maybe if you run a really high E mix and alot of timing to compensate for the smaller turbo.
There's no doubt you will max out PWG turbo with a custom tune and HPFP upgrade... but a pwg making that much power seems a little farfetched. |
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08-04-2020, 12:04 AM | #3 | |
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08-04-2020, 12:53 AM | #4 | ||
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08-04-2020, 11:50 AM | #5 | |
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I agree with getting an inlet, i am a big advocate now... MST v2 all the way. |
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08-04-2020, 12:25 PM | #6 | ||
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08-04-2020, 04:07 PM | #7 | |
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Key missing note is that was accomplished with METH. |
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08-04-2020, 04:27 PM | #8 | |
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Are you sure BMWDIYGUY runs meth? I dont follow dyno numbers really, so could be wrong, but i dont recall him mentioning it in his mod list... someone will need to dig up the thread. |
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08-04-2020, 04:42 PM | #9 | |
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08-04-2020, 05:22 PM | #10 | |
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No stock map baseline, and his Jordan tune only made 10hp more (on a cooler day) than his Active custom tune. Def not going to hold up in the summer. |
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08-04-2020, 05:49 PM | #11 | ||
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08-04-2020, 06:11 PM | #12 |
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No, he ran 93.
I will just reiterate what i always do that all these numbers that get thrown around are pointless for so many reasons, especially without a baseline. Different cars on different dynos on different days, etc etc. Not only that, but the shape of the curve for some custom tunes i have seen is awful - it might give you a peak # to brag about but area under the curve is what matters. So let's circle back to the original question - Yes, you will max out stock PWG turbo with a XDI-35 and a custom tune. The amount of power it makes in terms of xxx WHP is irrelevant because it is what it is - you wont be able to push any higher without a turbo upgrade. The more relevant question, which is equally as difficult to put a number to, is how much gain you will have relative to your current tune. That will depend heavily on your E mix, since the PWG turbo is already pushed pretty far on the OTS map, so most of the gains will be from timing and not more boost. I think you will have to answer that question in hindsight. I recommend getting some good 4th gear logs on a nice smooth road with your current setup and then go back and log under the same/closest conditions with the new setup and tune and throw them in VD for comparison. Last edited by thejeremyman9; 08-04-2020 at 06:19 PM.. |
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08-04-2020, 06:16 PM | #13 | |
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08-04-2020, 06:37 PM | #14 |
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To add context, I’ve got a Halim tuned FBO M2 with Dorch Stage 1 HPFP, Dinan turbo, and am running half 93/half E85.
We’re working to create a setup that is rock solid with no power loss or overheating the car on a 100F summer track day during a 45min open track session, and I have every plug & play cooling solution available (CSF, do88, Wagner Evo3), and I’m only expecting 425-430whp on a Dynojet. Sure, we could push more, but I have some 100F+ ambient logs with several back to back 3-4 & 3-4-5 pulls with hard braking in between, and we’ve got no timing pull and coolant/oil temps seem stable at the upper limit of what I want to see. I’m hitting the rollers next week with another M2 guy with a PS2 that is focused on max reliable power for the street so he’ll be able to push quite a bit further than me, but we’ll still overlay the curves and post up in the M2 forum so everyone can take a look. |
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08-04-2020, 09:21 PM | #15 |
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420whp....LOOOL That is what I am making with PS2 on 93+methanol.
Sales talk!
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08-04-2020, 11:17 PM | #17 | |
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Why on earth would you waste thousands of dollars on a hpfp upgrade with stock turbo? It will literally do nothing of benefit for you and the turbo will still fall flat after 5000rpm and you will still struggle to make 10psi past 6000rpm. Do yourself a favour and invest that money in a turbo upgrade, run the stg2h ots map and if you still aren't happy upgrade hpfp.
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08-05-2020, 09:05 AM | #18 |
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I would keep the XDI-35 in its box until you can get a new turbo. If you don't want to get a new turbo I would sell the fuel pump. Stage 2 OTS maps already max out the PWG turbo.
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08-10-2020, 10:28 AM | #19 |
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Hey yall..
So yes.. great numbers, early in the year, and weather, temp, humidity and a dozen other factors will flex those numbers. I agree though that the numbers themselves are almost useless, and just a snapshot in time. They could be better or worse tomorrow. I have my full buildout in my sig, but running 92oct with NO meth (though seriously thought about it) and stock turbo. I also agree that all of this build around the stock turbo is overkill, but that is next on the list, only so much I can do at a time. The upgraded HPFP though made a HUGE difference. I jumped almost 30rwp just on the pump change alone, so it can and will make a difference even with stock turbos. The jump was from the low 380s to like 410. Then going to the custom tune jumped me to 440. Fuel rail pressure was cratering at anything past about 5500 RPM with the stock HPFP, so the upgrade was absolutely worth it. I am very much aware I am flogging the stock turbo hard.. my logs from just yesterday showed 22.9 max at one point, so know I am sucking the life out of it. Big turbo upgrade is on my radar for hopefully no later than next spring, Pure, Littco or maybe Mosselman. My goal though isnt numbers.. its just butt dyno power increase (which I have now in spades, the car is almost silly at times), and reasonable reliability all on pump gas. I don't have time to blend e85, and really found the thought of meth a hassle. I want to just hit my local (good) gas station and call it good.
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08-11-2020, 06:59 AM | #20 | |
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08-12-2020, 08:51 AM | #21 | |
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08-12-2020, 08:55 AM | #22 | |
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