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SteamSpeed SteamSpeed is offline
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Default 08-21-2018, 02:07 PM

Quote:
Originally Posted by Bimmer_Boost
They are logging through MHD not the JB4. You can also download the CSV from Datazap .me.
I think they are using a COBB AP, and you are correct, datazap has all of the data which can be freely downloaded.
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SteamSpeed SteamSpeed is offline
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Default 08-21-2018, 02:09 PM

Here is the new data in a chart:
2011 335i M-Sport Manual
3rd gear pulls
92 octane with single port meth

The red lines are where we left off last time. Looks like it is hitting peak torque around 4k fairly consistently. It looks like we were able to pick up another 50 ft*lbs and 50 whp comparatively. Version 9 has new colder plugs, so the tune is backed off.

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JacquesN55 JacquesN55 is offline
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Default 08-21-2018, 02:29 PM

Why os torque droppimg off so bad


2011 135 n55 DCT RHD, MAMBA GTX3576R (5962) single turbo kit. Jb4 FBO. METH KIT WITH cm7 and cm4
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Bimmer_Boost Bimmer_Boost is offline
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Default 08-21-2018, 04:02 PM

Quote:
Originally Posted by SteamSpeed
I think they are using a COBB AP, and you are correct, datazap has all of the data which can be freely downloaded.
Name:  MHD.jpg
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2011 E92 335i Auto
12.0 @ 125MPH JB4
12.6 @ 112MPH 92 Octane | 11.7 @ 120MPH E30 MHD
Back to stock

2014 E84 X1 35i 13.9 @ 99MPH 293 AWHP 305 AWTQ
ER Chargepipe | BMS Intake |
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SteamSpeed SteamSpeed is offline
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Default 08-21-2018, 05:53 PM

Quote:
Originally Posted by JacquesN55
Why os torque droppimg off so bad
I know probably most people are interested in the technical details, but you can read on if you are or skip this post if you don't like reading about it.

There are lots of factors. The main turbo factors are:
hot side:
- flow through the turbines section
- efficiency of the turbine section to generate shaft speed
cold side:
- turbine shaft speed
- boost pressure
- comp wheel flow
- comp wheel efficiency
Note: both sides are interconnected with the turbine shaft.

In this case, the turbine housing in this case probably has the most impact on the torque curve. The basic idea is that the exhaust can't flow enough through the OEM turbine housing to keep up with the compressor wheel's output. I think the chart shows that the comp wheel is flowing a lot around 4-5k and the system is less efficient above 4.5-5k.

All systems should peak and drop off, but ideally you want to design the system to have a long flat torque curve. Tuning can also limit the initial surge of torque.
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blackhat75 blackhat75 is offline
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Default 08-30-2018, 10:07 AM

I'll probably try this turbo out. It's seems the engineering's there. I would like to hear some real world testimonials though. I hate being the guinea pig:p
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blackhat75 blackhat75 is offline
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Default 09-06-2018, 08:24 AM

I think this is the month I pull the trigger on a turbo upgrade. I really liked where this 78R was heading but it seems the detail train has come to a stop. Did anyone ponied up and got one of these lately?
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zole2112 zole2112 is offline
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Default 09-06-2018, 09:32 AM

Quote:
Originally Posted by blackhat75
I think this is the month I pull the trigger on a turbo upgrade. I really liked where this 78R was heading but it seems the detail train has come to a stop. Did anyone ponied up and got one of these lately?
I decided on the Speedtech kit, with the BW8374, just waiting to install later in Sept. Giving me a license to fly!


2013 BMW 335xi F30 N55 PWG
Injen CAI/ER CP/VRSF C-less DPipe/Active A FMIC/JB4 ISO_11 - Map 7/e50/Custom tuned exhaust/stock turbo/Resonator Delete/MHD BEF with JB4 e85/Stage 2 LPFP Walbro 450
Waiting to install: Speedtech BW 8374/PI/MHD BEF and Tune by Trebila
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blackhat75 blackhat75 is offline
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Default 09-10-2018, 12:54 PM

I like the fact that the 78R doesn't have clipping. Wonder if they tested for clipped vs. larger wheel? Wonder if Pure did the same comparison and found clipped to be better for our(N55) situation? They're up here in the Northwest so I'm gonna run by and talk with 'em. If they're serious about selling this to the masses, they could really use some more publicity.
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