|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
What the heck, Shiv & Terry fix bog at same time whos is better
|
|
09-16-2009, 02:05 PM | #67 |
Lieutenant
37
Rep 471
Posts |
I for one, can attest to the drop of boost pressure without this feature even with forge DVs with yellow springs....
|
Appreciate
0
|
09-16-2009, 02:10 PM | #68 | |
1743
Rep 17,960
Posts
Drives: A Lot
Join Date: Sep 2006
Location: SF Bay, CA
iTrader: (0)
Garage List 2018 Ducati Panigal ... [0.00]
2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00] |
Quote:
As you know, the secret isn't in the spring rate. It's in keeping the physical triggering conditions from occurring in the first place. And since the bypass valve is a mechanically driven device, we can't do that directly through piggyback tuning. We just have to create the right condition through boost control, throttle activation and ignition timing offsets. Shiv |
|
Appreciate
0
|
09-16-2009, 02:13 PM | #69 |
Joint Chiefs of Staff
4922
Rep 115,999
Posts |
As far as I know BMS has an automatic 135i and an automatic 335i. Probably explains why their automatic mapping has always been so much better. But I have a manual 335i and have been helping with the MT changes/developments lately.
Mike |
Appreciate
0
|
09-16-2009, 02:15 PM | #70 |
Joint Chiefs of Staff
4922
Rep 115,999
Posts |
Really?
To bring you in the loop, heavier springs require a greater pressure differential to open, between the charge pipe in front of the throttle body and diaphragm on top of the diverter valve. When we're talking about tuning a "no lift shift" as you put it, where the DV is intended to stay closed during the shift, it is much more challenging to keep the pressure differential below 4psi (stock DV levels) than those of heavier springs (aftermarket DV). Mike |
Appreciate
0
|
09-16-2009, 02:24 PM | #71 | |
1743
Rep 17,960
Posts
Drives: A Lot
Join Date: Sep 2006
Location: SF Bay, CA
iTrader: (0)
Garage List 2018 Ducati Panigal ... [0.00]
2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00] |
Quote:
Shiv |
|
Appreciate
0
|
09-16-2009, 02:40 PM | #72 | |
Joint Chiefs of Staff
4922
Rep 115,999
Posts |
Quote:
Mike |
|
Appreciate
0
|
09-16-2009, 02:46 PM | #73 | |
Banned
43
Rep 1,310
Posts |
Quote:
regards, Michael |
|
Appreciate
0
|
09-16-2009, 02:55 PM | #74 | |
1743
Rep 17,960
Posts
Drives: A Lot
Join Date: Sep 2006
Location: SF Bay, CA
iTrader: (0)
Garage List 2018 Ducati Panigal ... [0.00]
2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00] |
Quote:
Cheers Shiv |
|
Appreciate
0
|
09-16-2009, 03:04 PM | #76 | |
Major
68
Rep 1,432
Posts |
Quote:
However, with fixed tuning the yellow springs enable you to hold boost really well during the shift. |
|
Appreciate
0
|
09-16-2009, 04:17 PM | #79 | |
Lieutenant
37
Rep 471
Posts |
Quote:
I also wouldn't say bad tuning.... just not yet fully enhanced tuning (as i anxiously await the release of the new maps, and am totally happy with current maps) |
|
Appreciate
0
|
09-16-2009, 04:35 PM | #80 | |
Major
68
Rep 1,432
Posts |
Quote:
The outcome with good tuning depends on the DVs and the springs used. So testing the tunes with the same DVs is obviously better than testing the tunes with different DVs. The fix/no fix is the major difference. However DVs have a small effect as well. |
|
Appreciate
0
|
09-16-2009, 04:43 PM | #81 |
Lieutenant Colonel
640
Rep 1,716
Posts |
Shiv - but is the new procede compatible with mac?
very interested in newest version, will it work when i swap to my2010 335? thanks
__________________
Formerly addicted to e46fanatics
Formerly addicted to e90post |
Appreciate
0
|
09-16-2009, 05:37 PM | #82 | |
Joint Chiefs of Staff
4922
Rep 115,999
Posts |
Quote:
Mike |
|
Appreciate
0
|
09-16-2009, 05:40 PM | #83 | |
Joint Chiefs of Staff
4922
Rep 115,999
Posts |
Quote:
This really isn't rocket science. If the DME boost is below the target boost, and the gas pedal is pushed in 100%, the throttle is 100% open until close to redline. When you detect a reduction in the rate of change of RPM AND the gas pedal value drops, a manual shift is taking place. If the gas pedal value does not drop, an automatic shift is taking place. If the DME intervenes to cut boost due to loss of traction, overboost, etc, you'll see it in the TMAP input and solenoid duty cycle values. Reading the throttle blade position seems not nearly as useful as the DME target boost would be in terms of overall boost control logic. But the JB3 is designed in such a way that we never need to know the exact target, just within 1psi or so. It is designed to work without that information, just like your REV1 is. I suppose much of these details are of no interest to the general forum. Really all that matters is that it works well. There are currently 109 people testing 1.4 beta R8.3 and feedback among manual drivers has been very positive. Mike |
|
Appreciate
0
|
09-16-2009, 06:23 PM | #84 |
First Lieutenant
23
Rep 342
Posts |
Easy test
All this complicated testing talk....All we need is 2 willing 6mt cars. And say 4 good N54 6mt drivers.
Put shiv and terrys best new units in the cars. Let them test independently with out talking to one another. Film there reactions and vote on witch car better fixed the bogggggy man. If I ran both cars I could tell in a couple runs weather the fix is bull or the cats meow. And anyone else who is a DRIVER can tell also. |
Appreciate
0
|
09-16-2009, 06:44 PM | #85 |
Lieutenant Colonel
318
Rep 1,517
Posts
Drives: Ever changing fleet
Join Date: May 2007
Location: Alabama
|
So what does that make you, besides the most epic drama queen I've run across on automotive forums to date?
__________________
23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
|
Appreciate
0
|
09-16-2009, 06:46 PM | #86 | |
Colonel
94
Rep 2,339
Posts |
Quote:
But that's just me. Continue if you must.
__________________
What do I know? I'm insane.
|
|
Appreciate
0
|
09-16-2009, 06:49 PM | #87 |
Colonel
94
Rep 2,339
Posts |
It makes me happy knowing that I bug the bejesus out of you.
__________________
What do I know? I'm insane.
|
Appreciate
0
|
09-16-2009, 06:52 PM | #88 |
Lieutenant Colonel
318
Rep 1,517
Posts
Drives: Ever changing fleet
Join Date: May 2007
Location: Alabama
|
Doesn't really bug me that much. You are quite good at stirring the pot, which honestly is needed from time to time.
__________________
23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
|
Appreciate
0
|
Bookmarks |
|
|