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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications David Shoup Tune
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      04-08-2020, 11:43 AM   #177
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Good stuff. Can't wait to find and fix my leak. I'm keeping my AZ-MCRacer inlet. I fitted it with part of the stock grommet so there's no unmetered air happening at that point. I think my leak is at the valve cover which i don't have prior to the DS tune. Which means his tune found my weak points when setting the target to 22psi.
I am just wondering if he is getting me to 20psi now and adjust tune for timing then how much I can get out of Helix. I think lpfp stage 2 is helping as that is one of the things David Shoup asked me about before I bought his tune. I think I am also going to get the breather oil cap to help with crankcase pressure.
Not sure what the combo of a upgraded lpfp and helix can actually do. Just keep in mind there's going to be engine limits as the N55 is not reinforced. If you can clear the 500-550whp I think that would be the limits of a semi dependable street build.
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      04-08-2020, 12:11 PM   #178
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Not sure what the combo of a upgraded lpfp and helix can actually do. Just keep in mind there's going to be engine limits as the N55 is not reinforced. If you can clear the 500-550whp I think that would be the limits of a semi dependable street build.
If I can do 550whp then I am happy. As long as I am not WOT every stop light and every day all the time then I don't think 550whp would be an issue. I do not plan on taking it further then that. I know people saying you don't need lpfp upgrade if you go Helix, but I think with straight E85 it is must to have a stage 2 lpfp to keep up with demand. I could be wrong and you might prove me wrong once your car is done tuning.
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      04-08-2020, 01:30 PM   #179
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Not sure what the combo of a upgraded lpfp and helix can actually do. Just keep in mind there's going to be engine limits as the N55 is not reinforced. If you can clear the 500-550whp I think that would be the limits of a semi dependable street build.
If I can do 550whp then I am happy. As long as I am not WOT every stop light and every day all the time then I don't think 550whp would be an issue. I do not plan on taking it further then that. I know people saying you don't need lpfp upgrade if you go Helix, but I think with straight E85 it is must to have a stage 2 lpfp to keep up with demand. I could be wrong and you might prove me wrong once your car is done tuning.
500whp is a lot of power, key being whp. Be careful and responsible with that power as it can quickly get out of control on you in a dangerous way. My recommendation would be to take a few autocross courses or get some track time to know your limits. I know when my car is at its limits, however once this tune is done I'm going to have relearn my car.
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      04-08-2020, 02:02 PM   #180
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500whp is a lot of power, key being whp. Be careful and responsible with that power as it can quickly get out of control on you in a dangerous way. My recommendation would be to take a few autocross courses or get some track time to know your limits. I know when my car is at its limits, however once this tune is done I'm going to have relearn my car.
I am AWD so it is different for me compare to your RWD plus I run sticky summer tires.
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      04-08-2020, 02:10 PM   #181
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If I can do 550whp then I am happy. As long as I am not WOT every stop light and every day all the time then I don't think 550whp would be an issue. I do not plan on taking it further then that. I know people saying you don't need lpfp upgrade if you go Helix, but I think with straight E85 it is must to have a stage 2 lpfp to keep up with demand. I could be wrong and you might prove me wrong once your car is done tuning.
I don't think the demand is the issue with the LPFP I think it's the compatibility with full e85, meaning the ethanol will ruin the pump.
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      04-08-2020, 04:11 PM   #182
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I don't think the demand is the issue with the LPFP I think it's the compatibility with full e85, meaning the ethanol will ruin the pump.
Not sure why David Shoup asked me, "are you at least running stage 2 lpfp?" Even though he knew I am only using 93 octane and had 0 clue regarding my Helix OD plans. I think there is a psi difference too between the OEM pump vs stage 2 pump. But honestly I would love to go back to OEM lpfp if lpfp stage 2 is useless.

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      04-08-2020, 04:30 PM   #183
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Ask him! He will know... Lol, don't listen to me!
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      04-08-2020, 04:34 PM   #184
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Ask him! He will know... Lol, don't listen to me!
Or I am wrong and I told him in excitement about the Helix OD and e85 lol and now forgot about it.
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      04-08-2020, 05:06 PM   #185
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i run the 525 Hellcat pump. On e30 e40 never had a problem with y 450 on e50. Soon as i went pass that the e85 put a strain on the EKPM3 and left me stuck a couple of times. My advice. If your plannning onrunning e50+ get yourself a 525 hellcat pump where the fuel pressure rises with the boost and an ekpm3. If your lower then you should be fine.
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      04-08-2020, 07:44 PM   #186
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i run the 525 Hellcat pump. On e30 e40 never had a problem with y 450 on e50. Soon as i went pass that the e85 put a strain on the EKPM3 and left me stuck a couple of times. My advice. If your plannning onrunning e50+ get yourself a 525 hellcat pump where the fuel pressure rises with the boost and an ekpm3. If your lower then you should be fine.
Do you mean bpm4? My car already got ekpm3 Module and I always get the power too high for the pressure Code. That is I rather go back to stock pump lol, than spending 700 dollars on a module. We will see how it goes and maybe I will go bpm4 route if needed.

Side note, car is completely different on a 20psi tune.

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      04-08-2020, 07:45 PM   #187
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Originally Posted by Bmwdoubles_ View Post
Not sure what the combo of a upgraded lpfp and helix can actually do. Just keep in mind there's going to be engine limits as the N55 is not reinforced. If you can clear the 500-550whp I think that would be the limits of a semi dependable street build.
Did you ask David about the lpfp at all or has he said anything?
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      04-08-2020, 09:50 PM   #188
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Not sure what the combo of a upgraded lpfp and helix can actually do. Just keep in mind there's going to be engine limits as the N55 is not reinforced. If you can clear the 500-550whp I think that would be the limits of a semi dependable street build.
Did you ask David about the lpfp at all or has he said anything?
No i have not asked.

Pros and cons on our fueling choices.

Mine takes care of top end fueling but makes a metal clanking sound occasionally.

Yours holds good pressure up top too but could potentially melt your top hat or ekps or both or have a hose pop off.

People using meth could blow up their car either by no ecu control under detonation or worse a line breaks loose.
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      04-08-2020, 10:24 PM   #189
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No i have not asked.

Pros and cons on our fueling choices.

Mine takes care of top end fueling but makes a metal clanking sound occasionally.

Yours holds good pressure up top too but could potentially melt your top hat or ekps or both or have a hose pop off.

People using meth could blow up their car either by no ecu control under detonation or worse a line breaks loose.
I am going to get Helix OD soon hopefully. I am running lpfp stage 2 for over a year now. I will remove the back seat next time I am getting oil change done to see how everything looks.
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      05-07-2020, 08:24 PM   #190
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Any updates on this Bmw doubles? ziekxq
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      05-07-2020, 08:27 PM   #191
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Any updates on this Bmw doubles? ziekxq
So far making 430whp. We'll get 500whp but i have a boost leak and wgdc are at 95%. Thought I fixed it so now i need to smoke test it. The car rips even with the leaks.
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      05-07-2020, 08:29 PM   #192
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Is David waiting for you to get that sorted out or does he even need to? I would imagine he's feeding in the boost but you just can't hold it...?

Awesome stuff.
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      05-07-2020, 09:48 PM   #193
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Originally Posted by Bmwdoubles_ View Post
So far making 430whp. We'll get 500whp but i have a boost leak and wgdc are at 95%. Thought I fixed it so now i need to smoke test it. The car rips even with the leaks.
430whp... What psi you at and what timing are you running?
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      05-08-2020, 06:25 PM   #194
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Quote:
Originally Posted by ziekxq View Post
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Originally Posted by Bmwdoubles_ View Post
So far making 430whp. We'll get 500whp but i have a boost leak and wgdc are at 95%. Thought I fixed it so now i need to smoke test it. The car rips even with the leaks.
430whp... What psi you at and what timing are you running?
Peak 22 because I don't have my 3.5 tmap is.


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430whp to the top! When the leaks are fixed I'll should be smashing on a lot cars. There an N55 out there on IG smashing on lambos! I'll share soon.
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      05-08-2020, 07:52 PM   #195
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I think I am going to sell this car and move on.... We have been trying but timing corrections don't want to go away... Tried 93oct + 3 gallons of e85 but no difference. I am giving up hope. I already tried changing plugs and coils twice.
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      05-09-2020, 02:12 AM   #196
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Anyone know if David tunes ewg n55's. I know his FB says early model n55's but I'm leaning more toward a custom tune to get off the OTS maps and would love to go to someone highly recommended.
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      05-09-2020, 02:37 AM   #197
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I think I am going to sell this car and move on.... We have been trying but timing corrections don't want to go away... Tried 93oct + 3 gallons of e85 but no difference. I am giving up hope. I already tried changing plugs and coils twice.
I feel ya bro the N55 is not a tuner friendly platform. I've been scoping F10 M5's also e90 M3's. 2 different worlds but V8's are the next list. How much power did you finally pull out of yours? Roughly? The B58 motors on the 3 and 440's are producing large power!
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      05-09-2020, 02:40 AM   #198
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Anyone know if David tunes ewg n55's. I know his FB says early model n55's but I'm leaning more toward a custom tune to get off the OTS maps and would love to go to someone highly recommended.
Yes he does EWG and honestly you're going to get better results than us PWG guys. Your down pipe is 4" and ours is 3.5 plus EWG you get full control of the WG. If I had the 4" DP and EWG with the upgraded hpfp for that platform i would be way past 500whp. I'm hitting 430whp to the top with problems
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