[M2guru]

Originally Posted by whitesharkM2

Is anyone like me? Pure 750 has a howling sound.
low rpm cadence

No howling/voices on mine. Stock intake.

[whitesharkM2]

Originally Posted by M2guru

No howling/voices on mine. Stock intake.

Previously, I also used Stock intake.
There is a howling sound too, but not as intense as Eventuri intake

[mwpa71]

Have you finished the tuning?

[VGSON]

Originally Posted by mwpa71

Have you finished the tuning?

who?
Im still working with wedge, my revs are like once a week or two cuz of time..but currently at 25psi and strong timing(10-15deg)… i want to turn it up more but steve is keeping me from hurting shit. New tires/wheels helped too…old ones where spinning bad

[mwpa71]

Cheers..
How many revisions so far?
25psi at redline or still tapering down?

[VGSON]

think im on #9? but also changed some parts around rev 5(?)…pretty much holding 25 now when doing a long pull..it was being tapered before. he was trying to get boost control nailed down. I believe we are going to start turning it up bit by bit now…steve from wedge is either super busy or not very talkative..tried getting info from him & expressed id like to ramp up power thru rpms/opposite of taper…basically didn’t get much feedback other than “heres your new rev”…would still recommend him though as car is running great. stock manners and tons of power up top…

attached is a log in 5th gear…stopped around 5500rpm for obv reasons..cylinder 1 is pulling timing but everything else looks solid..wgdc is low 90’s..

[F87source]

Originally Posted by VGSON

think im on #9? but also changed some parts around rev 5(?)…pretty much holding 25 now when doing a long pull..it was being tapered before. he was trying to get boost control nailed down. I believe we are going to start turning it up bit by bit now…steve from wedge is either super busy or not very talkative..tried getting info from him & expressed id like to ramp up power thru rpms/opposite of taper…basically didn’t get much feedback other than “heres your new rev”…would still recommend him though as car is running great. stock manners and tons of power up top…

attached is a log in 5th gear…stopped around 5500rpm for obv reasons..cylinder 1 is pulling timing but everything else looks solid..wgdc is low 90’s..

You're going to have to post a link to datazap or bm3, because these screen shots aren't very helpful.

[mwpa71]

Originally Posted by VGSON

think im on #9? but also changed some parts around rev 5(?)…pretty much holding 25 now when doing a long pull..it was being tapered before. he was trying to get boost control nailed down. I believe we are going to start turning it up bit by bit now…steve from wedge is either super busy or not very talkative..tried getting info from him & expressed id like to ramp up power thru rpms/opposite of taper…basically didn’t get much feedback other than “heres your new rev”…would still recommend him though as car is running great. stock manners and tons of power up top…

attached is a log in 5th gear…stopped around 5500rpm for obv reasons..cylinder 1 is pulling timing but everything else looks solid..wgdc is low 90’s..

Good one.. it can be painfully slow waiting for revisions..as long as you are happy with the progress....
Have you got any 4th gear logs? Datazap? Ss?
I wonder if your tune is cwg or pid??big difference in spool time.
25 psi is probably the good daily compromise with decent wgdc.
Look forward to progress 👍

[VGSON]

Originally Posted by F87source

You're going to have to post a link to datazap or bm3, because these screen shots aren't very helpful.

All/most of the data is right there. Not sure what it is you’re not seeing. familiar with mhd logs?

[F87source]

Originally Posted by VGSON

All/most of the data is right there. Not sure what it is you’re not seeing. familiar with mhd logs?

No one reads logs via charts alone, we trace the lines to examine the true values as lines can be misleading - especially if the scale is very large or very small compared to the values.

Also all of your lines are unlabeled.

[mwpa71]

Originally Posted by F87source

No one reads logs via charts alone, we trace the lines to examine the true values as lines can be misleading - especially if the scale is very large or very small compared to the values.

Also all of your lines are unlabeled.

Fair points.
Tuners dont accept screenshots... well mine don't 😃👍

[F87source]

Originally Posted by mwpa71

Fair points.
Tuners dont accept screenshots... well mine don't 😃👍

That's because charts are mostly useless for reading data longs without the ability to see the data points themselves, they do give you an idea of trends but nothing on actual values (because charts intrapolate between finite data points during sampling, and we want to see the actual data points themselves).

Also it is a huge pain to trace a line to the axis to try and interpret the data value, no one is going to waste their time doing that.


And of course which line is what (pictures don't allow you to remove irrelevant data lines which means clutter and garbage further skewing the y axis scale and making it harder to read the log)? That's the biggest problem here.

[VGSON]

Originally Posted by F87source

That's because charts are mostly useless for reading data longs without the ability to see the data points themselves, they do give you an idea of trends but nothing on actual values (because charts intrapolate between finite data points during sampling, and we want to see the actual data points themselves).

Also it is a huge pain to trace a line to the axis to try and interpret the data value, no one is going to waste their time doing that.


And of course which line is what (pictures don't allow you to remove irrelevant data lines which means clutter and garbage further skewing the y axis scale and making it harder to read the log)? That's the biggest problem here.

I haven’t shared actual logs publicly out of respect for my tuners(previous and current). Data can be extracted/stolen from their tunes thru the logs. Along with inferences/assumptions... I have shared them with others running the pure750 when we where troubleshooting this new turbo. My datazap isnt private either. The data is there^ & is actually easy to read: green is rpm, pink is target ram boost, blue is actaul ram boost…Whether anyone is wanting to put in effort to extrapolate is on them. I’ve also given detailed info on what is happening while the chart is a visual aid. Again, I am here to help others running down this rabbit hole. I answer their PM’s often. Not promoting, selling, or proving. There’s others in this thread who also have a pure750 & they are welcome to share their logs.

[M2guru]

I've lost track: Is anyone else doing 20+ minute sessions on a PURE750? I'd like to compare logs if so.

[wassy4]

Originally Posted by M2guru

I've lost track: Is anyone else doing 20+ minute sessions on a PURE750? I'd like to compare logs if so.

abirmaher might be able to help here. He recently upgraded to the Pure750 and tracks, not sure if he’s gone since upgrading though.

[abirmaher]

Originally Posted by wassy4

abirmaher might be able to help here. He recently upgraded to the Pure750 and tracks, not sure if he’s gone since upgrading though.

I’ve only one track day at Daytona since upgrading and the sessions were just about 20 mins.

Car did great. Ended up popping off a coolant line when things got very hot and almost overheated the engine but luckily it was fine.

[squalacheck]

Reading all posts I see several mentioning the TS plumb back BOV. Is this recommended to use by others without issues? 3rd gear WOT pulls on Rev3 near 19psi is resulting in Blow Off valve Clamped shut fault code numerous times. Goal is 23-24psi for stock engine. Any recommendations any can offer? Should I reseat it? Check the spring? Seems finicky but always seems to pop when I take the car to or near redline and don’t want to damage the turbo. If anyone else has recommendation for alternatives that do not vent to atmo also, thank you. Obviously nothing the tuner can do as they’re simple mechanism but they say the car is running fine despite this fault popping. I’ve confirmed with pure that the DV appears to have been oriented properly on the turbo. Do I need the vr11? I see folks saying the vr9 is no good.

I also see a few others reporting hitting peak boost or near at 4,000 rpm. But mine hardly starts spooling until 3,700-4,000 in sport mode. Is this 20psi range being achieved at 4,000 on the n55 or a different engine? What can I do to reduce turbo lag and get it spooling earlier in RPM range? I don’t think I got the larger inlet inner diameter despite buying the inlet from pure through kies who then orders it from pure which is disappointing.

As many others also report, the turbo takes a bit to build up but hits hard and holds all the way to redline. Amazing feeling that my tires are so planted but that will change as boost goes up with more Revs. so happy with it overall. Just struggling to work through some pesky issues.

Next up on the journey once tune and DV are sorted is suspension, SPL parts full front setup, rear traction arms, end links, and H&R sway bars front rear before getting further into it. Target WHP 550-600.

N55 335i
MHD - custom
CTS intake
Pure silicone inlet
Pure 750
turbosmart Kompact EM Plumb Back VR9 - should I get VR11?
Stock turbo to FMIC CP - I bought VRSF billet piece but it didn’t fit well enough and clips didn’t fit proper enough my mechanic was wary of installing.
VRSF intercooler (not 7.5”)
VRSF charge pipe
NGK 0.022-0.023 plugs
Stock Bosch coils
DS1.5 HPFP
Fuel It Stage 3 stock LPFP w/ Walbro 525 2nd - dedicated wiring 30a fuse to battery
Hobbs 4psi switch - triggering walbro
AWE downpipe
AWE Midpipe
AA axle back exhaust

[M2guru]

Originally Posted by abirmaher

I’ve only one track day at Daytona since upgrading and the sessions were just about 20 mins.

Car did great. Ended up popping off a coolant line when things got very hot and almost overheated the engine but luckily it was fine.

Did you log any data from your session(s)? Which line did you pop off? Who tuned your car?

[AmuroRay]

Originally Posted by squalacheck

Reading all posts I see several mentioning the TS plumb back BOV. Is this recommended to use by others without issues? 3rd gear WOT pulls on Rev3 near 19psi is resulting in Blow Off valve Clamped shut fault code numerous times. Goal is 23-24psi for stock engine. Any recommendations any can offer? Should I reseat it? Check the spring? Seems finicky but always seems to pop when I take the car to or near redline and don’t want to damage the turbo. If anyone else has recommendation for alternatives that do not vent to atmo also, thank you. Obviously nothing the tuner can do as they’re simple mechanism but they say the car is running fine despite this fault popping. I’ve confirmed with pure that the DV appears to have been oriented properly on the turbo. Do I need the vr11? I see folks saying the vr9 is no good.

I also see a few others reporting hitting peak boost or near at 4,000 rpm. But mine hardly starts spooling until 3,700-4,000 in sport mode. Is this 20psi range being achieved at 4,000 on the n55 or a different engine? What can I do to reduce turbo lag and get it spooling earlier in RPM range? I don’t think I got the larger inlet inner diameter despite buying the inlet from pure through kies who then orders it from pure which is disappointing.

As many others also report, the turbo takes a bit to build up but hits hard and holds all the way to redline. Amazing feeling that my tires are so planted but that will change as boost goes up with more Revs. so happy with it overall. Just struggling to work through some pesky issues.

Next up on the journey once tune and DV are sorted is suspension, SPL parts full front setup, rear traction arms, end links, and H&R sway bars front rear before getting further into it. Target WHP 550-600.

N55 335i
MHD - custom
CTS intake
Pure silicone inlet
Pure 750
turbosmart Kompact EM Plumb Back VR9 - should I get VR11?
Stock turbo to FMIC CP - I bought VRSF billet piece but it didn’t fit well enough and clips didn’t fit proper enough my mechanic was wary of installing.
VRSF intercooler (not 7.5”)
VRSF charge pipe
NGK 0.022-0.023 plugs
Stock Bosch coils
DS1.5 HPFP
Fuel It Stage 3 stock LPFP w/ Walbro 525 2nd - dedicated wiring 30a fuse to battery
Hobbs 4psi switch - triggering walbro
AWE downpipe
AWE Midpipe
AA axle back exhaust

THe VR11 has a different harness. And I have a stock turbo with the VR9 with the same code. I don't think it effects anything, unless you know otherwise. I can say that it does allow the turbo to hold boost better between shifts.

Who is your tuner? I absolutely believe you can have full spool by 3500RPM, but what do I know, I'm a guy behind a screen.

[VGSON]

in 4th gear on mine. 3500rpm is 15/16psi then by 4k im at 20, 4200 im at 27ish..4th gear pull…Not sure what your issue is exactly, but you’re going to need injectors and likely a liftkit. Unless you keep emix really low. Maybe it can work

[squalacheck]

Originally Posted by AmuroRay

THe VR11 has a different harness. And I have a stock turbo with the VR9 with the same code. I don't think it effects anything, unless you know otherwise. I can say that it does allow the turbo to hold boost better between shifts.

Who is your tuner? I absolutely believe you can have full spool by 3500RPM, but what do I know, I'm a guy behind a screen.

Jordan Tuning. Thanks for the input on the BOV I appreciate it a lot.

[squalacheck]

Originally Posted by VGSON

in 4th gear on mine. 3500rpm is 15/16psi then by 4k im at 20, 4200 im at 27ish..4th gear pull…Not sure what your issue is exactly, but you’re going to need injectors and likely a liftkit. Unless you keep emix really low. Maybe it can work

Running 92 pump gas. Dorch specifically told me I will not need S63 (other any others) injectors or a liftkit to reach goal hp/boost target.