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New N54 5-10 v5 PWM maps/firmware
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05-26-2011, 03:31 AM | #375 |
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05-26-2011, 03:46 AM | #376 |
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Has Shiv explained the difference b/w Boost Response and Boost Control Gain anywhere, and what the ranges of values mean for each? There is differing advice in this thread as to what each does, and which one will give back the quicker boost ramp up in lower RPM's.
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05-26-2011, 03:57 AM | #377 | |
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Boost Response parameter just controls the throttle point at which boost starts to ramp up. Mostly a subjective thing as different people prefer different boost/throttle relationships. Cheers, Shiv |
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05-26-2011, 08:00 AM | #378 | |
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No the recircs are stock, and again it was so much "holding" the pressure, but I assure you it can get there. It basically would shoot to 20psi then start to fall back down.
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05-26-2011, 09:48 AM | #379 | ||
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I will try this too. Right now I am finding that I have lost some power from the 3-30 maps to the 5-10 maps in the 1500 to 3500 range. After 3500 power comes on strong... I would prefer the strong pull at 1500 to 2000 so I will change my boost control to 50% and see what this does. I also have to get my logging working - I have to copy some files around apparently.... gotta read more on this. Any suggestions guys?
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05-26-2011, 11:35 AM | #380 |
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If you wait for the Wastegate compensation to do its thing, it will ramp itself up to where it was in the 3-30 maps over a little bit of time. I just set the starting point a little lower so those who have stiffer/newer wastegates won't boost overshoot/oscillate. Just be patient and it will work itself where it needs to be for YOUR car. After a few days of driving, check the wastegate compensation value %. If it's maxed or min'd out at +5 or -5%, then you can make the manual adjustment down or up (respectively). If you found that you value was stuck at +5%, this is because you have softer/looser wastegates than most and need the extra boost DC to hit boost target.
Please understand has nothing to do with Autotuning being disabled. Shiv |
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05-26-2011, 06:00 PM | #381 |
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Shiv, sent you an email regarding these maps...
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05-26-2011, 06:05 PM | #382 | |
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If you are reading from the fuel gauge and you overboost (meaning you exceeded MAX boost settings) the throttle closes. During the throttle closure process it will further induce a false inflated boost pressure and you will notice the car will have extremely laggy response. The 3-30 maps were very boost happy. Are you still on those? Go to 5-10 if you havnt. The reason it is false is because boost is read PRE throttle body. When the throttle blade closes, it creates a turbulance to where the boost is read thus creating a false inflated boost reading. Be aware this is not the actual pressure in the intake manifold or the engine. If you are overboosting you should adjust your boost delay another + 10. This means you overboosted and in doing so the PROcede has closed throttle out of safety. If your still confused PM me. |
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05-26-2011, 06:49 PM | #383 | |
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So if Boost Response is already set to 100% by default, and there's no more room to make it more "responsive", it's the Boost Control Gain that one would adjust to get the old boost back? Would it be ok for us to bump up the Boost Control Gain to 50%, even without first checking the wastegate compensation in the datalog menu? |
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05-26-2011, 06:53 PM | #384 | |
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Also, low end boost targets have not changed appreciably over the past year or so. So the old maps do not have more low end torque. In fact, they have slightly less. But what has changed over time is the relationship between boost target and applied throttle. |
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05-29-2011, 03:58 PM | #387 | |
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I can floor it in 2nd at 2,5k rpm, and the wheels will barely lose traction. Boost gain is set to 50%. Yes, the car will accelerate hard, but I kinda miss the raw power down low of the JB4 which, in the same situation, would make traction control kick in wildly...
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05-29-2011, 05:45 PM | #388 |
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V5 is nice but I do miss the power down low that v4 had. My car just doesn't seem that quick anymore even thoughh it might be faster. Looking forward to future updates.
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05-30-2011, 07:16 AM | #389 |
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Here's something I noticed on my 3-30 and 5-10 logs. On both logs, the Boost Control Set Point shows that the boost should be kicking in well before it actually is, so there is a bit of delay in both. Keep in mind that both logs have the DC set to 50%. There's also a strange oddity between shifts. In the 3-30 maps the AFR drops to 11.8 when the throttle is closed, which is fine of course, then steadys out below 12, around 11.8. Also, good.
The 5-10 maps show the AFR dropping to 9.8 in between shifts when the throttle is closed, which is pig rich IMO, then normalize above 12, around 12.5 AFR in the upper RPMs. Not ideal IMO. And these results are repeatable of course. I can send you the files if you would to review Shiv, just let me know. 3-30 ![]() 5-10 |
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05-30-2011, 09:59 AM | #390 |
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that's just the logging software when you combine channels on 1 graph. separate them and you'll see that they match pretty close with some delay in the beginning for spool time.
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05-30-2011, 11:14 AM | #391 |
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+1, just a scaling bug that occurs sometimes when you combine multiple graphs. just separate them
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05-30-2011, 11:36 AM | #392 |
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05-30-2011, 05:06 PM | #393 |
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I looked at the raw data before I posted, and there is a delay in the boost response. The boost still seems to come on slower than it should in the lower rpm, could be my imagination.
What about the change in AFR? Anyone see DME code 11757? Last edited by C4sF80M3; 05-30-2011 at 05:23 PM.. |
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05-30-2011, 06:01 PM | #394 | |
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I agree, raised boost gain to P And that helped a little but still seems slow to build
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05-30-2011, 06:02 PM | #395 |
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i know someone that just got it on 5-10 maps.
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05-30-2011, 06:13 PM | #396 | |
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But it's not accurate to say that it boost builds slower than it should because it is programmed to do this in the newer maps.......so it's doing what it should. But boost definitely builds a little less rapidly than it did on earlier maps. I too would like it reverted back to how it was. |
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