09-27-2019, 12:41 PM | #1 |
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Aftermarket turbo inlet on stock turbo.
I just ordered an aftermarket replacement inlet that I am gonna swap on my stock turbo.
Ive seen almost nothing as far as people doing this with stock turbo as its generally all but required with a turbo upgrade. Since I am not doing a turbo and hpfp upgrade for a while I wanted to do whatever I could for any little extra. We know the stock one is sort of restrictive but not a huge deal with stock turbo. Ive seen a few guys who seen an increase of 1-2 lbs/min through their maf readings. Increase in flow means more power for sure. Its not huge but for someone who is FBO on a stage 2 e30 flash it sure helps. With a basic rule of 10hp per 1lbs or so... a 10hp gain is good for sure. So inlet is ordered and Ill have it next week, for anyone interested I will do some logs and post them up. Will have pics up on Instagram as well.
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2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc Last edited by n55david; 09-27-2019 at 12:47 PM.. |
09-27-2019, 02:00 PM | #2 |
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You've probably seen my logs, but for anyone on the fence here is mine before Pure Inlet and after.
OTS Stage 2 91 Before inlet http://www.bootmod3.net/log?id=5b1f1da5d10b4355bc6a667d After inlet http://www.bootmod3.net/log?id=5baadd37d10b435c56a38456 |
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09-27-2019, 02:02 PM | #3 |
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Hey! Yeah I am in the same boat as you as far as being FBO on my 335i with stage 2 E30 BM3 tune. Which inlet did you buy? Also, have you done the GFB DV+ upgrade? That is my next thing to do since it is relatively inexpensive and I heard it holds boost better than stock. Please keep us updated!
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09-27-2019, 02:04 PM | #4 | |
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Im going to see if I can get the updated charge pipe from tiago and do it all at the same time.
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2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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09-27-2019, 02:22 PM | #5 | |
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I have not done the DV, Basically, I will eventually upgrade the turbo and I will do it then or I will get an M car... so for now im not worried.
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2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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09-27-2019, 02:47 PM | #6 | |
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09-27-2019, 02:56 PM | #7 |
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I am hoping so!
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2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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09-27-2019, 06:18 PM | #8 |
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Oh no, you may want to cancel. Only the Pure Inlet is larger than stock, the FTP is the same as the stock piece.
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09-27-2019, 07:36 PM | #9 | |
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Ordering the pure version... Last edited by n55david; 09-27-2019 at 08:02 PM.. |
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09-30-2019, 08:47 AM | #10 | |
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'14 F20 M135i EWG FBO:// INJEN INTAKE // PURE INLET// TURBOSMART BOV DUAL PORT // //CSF INTERCOOLER // ER CP // SNOW S2.5 METH KIT // B58TU HPFP // NGK 97506 // ER DP // TMSS MID PIPE //MPE // MPBBK // UR STRUT BRACE // BM3 CUSTOM JORDAN E85 TUNE // XHP STAGE 3 // |
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09-30-2019, 09:26 AM | #11 |
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Mass air flow sensor readings.. its in lbs per min... the higher the number the more air flow is passing by the sensor. The higher the intake of air the higher the power to be made by the engine.
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09-30-2019, 11:34 AM | #12 | |
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By eliminating the stock pipe constriction point the Pure Turbo pipe adds +42% more potential airflow into the turbo. I also have a '15 335i. I've been told by several who I trust that upgrading to the Pure Turbo inlet pipe would not provide a gain running BootMod3 Stage2 N55 EWG 93 Octane because the stock inlet was not holding back any performance gains, that the performance level of the stock turbo itself had been maxed out (running 93 Octane). Supposedly, the next performance bump would require a Pure Turbo Stage2 turbo upgrade. So I'm anxious to know the before and after mass air flow readings. Are there other factors such as ambient temperature when the two measurements were taken that might effect the values? |
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09-30-2019, 11:42 AM | #13 |
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FYI- Someone previously measured the FTP inlet pipe and determined that all they did was copy the stock inlet pipe in aluminum, including the restriction.
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09-30-2019, 12:07 PM | #14 | |
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2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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09-30-2019, 12:08 PM | #15 |
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Yeah, i see that info now. sending the ftp pipe back and have the Pure inlet ordered.
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2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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09-30-2019, 12:14 PM | #16 | ||
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10-01-2019, 01:47 PM | #17 | |
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MAF Comparison With Pure Turbo Inlet Pipe
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It's interesting that your airflow numbers from 3000-3500 RPMs are significantly lower with the Pure Turbo inlet pipe. There was no difference from 4000-4500 RPMs. But there was a significant 8%-9% airflow increase from 5000-5500 RPMs and an airflow increase of 4%-5% continued from 6000-6500 RPMs. Of course this is all assuming that the logs were taken under exactly the same conditions and there were no other variables. Also assumes that this is reproducible if more before and after logs were taken. I'm not sure how to account for lower air flow at lower RPMs. I don't remember much flow dynamics from physics class. The main physical difference between the two pipes is that the PT pipe does not have the constriction at the end so it can handle 42% more flow than the stock pipe right as it enters the turbo. This is pure speculation on my part but maybe the larger PT pipe exit reduces velocity at lower RPMs so that actually makes for less flow until engine speed increases enough to utilize the higher flow capacity of the PT inlet pipe. Pray For Mojo did you notice less engine response below 4000 RPM? Are there any flow dynamics guys out there or anyone else who has added a Pure Turbos Inlet pipe to an N55 with a stock turbo? Please chime in. |
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10-01-2019, 01:58 PM | #18 | |
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2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD 2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots IG: @n55david For pics and updates! Youtube: @ n55david For videos or Racing etc |
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10-01-2019, 02:57 PM | #19 | ||
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One of the things that makes the N55 so attractive is the low end torque that makes it so responsive and drivable. So the numbers would seem to be against adding the PT inlet to a stock turbo car. Anyone else out there who has done this? Did it reduce low end response from standing starts or when you need to suddenly accelerate to pass? |
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10-01-2019, 06:22 PM | #20 | |
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10-01-2019, 09:20 PM | #21 |
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EWG, noticed no change in responsiveness. You should probably omit the data in your table below 3,600rpm considering it isn't 100% throttle on the second log. I avoid going WOT below 3,500 to prevent LSPI.
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10-01-2019, 10:48 PM | #22 |
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Ahh, thanks for the heads up. First time that I got to look at graphs on a larger screen. I didn't catch the lower throttle%. That would explain the low numbers in the "after" set, especially if you aren't seeing any change in low rev responsiveness. Thanks!
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