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10-26-2020, 10:48 PM | #45 |
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10-26-2020, 11:56 PM | #46 | |
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10-29-2020, 01:19 AM | #47 |
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10-29-2020, 04:01 AM | #48 |
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Drives: E90 M3, U11 X1
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Stage 2 tune, BW resonated x-pipe, OEM rear section, Dinan intake, 92 oct, 6mt.
I don't notice a wild drop in power like some have mentioned, but there does seem to be slight hesitation in that rpm range (rasp more than anything). Let me know if I can be of assistance? Looking forward to positive results! |
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10-29-2020, 07:27 AM | #49 | |
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The issue is most apparent for my when launching the car at an autox event. Look at this video, you can hear it as the car stops accelerating for a split second. On a DCT car it is when trying to launch the car smoothly. If you just stomp on the pedal the DCT will just raise the RPM and dump the clutch and you'll have a smokey burn out and won't notice this issue. On a 6MT car I am not sure how to best reproduce this, but you would need to be at WOT at around 1500 rpm, then once over 2k is where it is usually felt.
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10-30-2020, 05:25 AM | #51 |
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I tested it yesterday, there is a big improvement. On part throttle it's almost gone, on full throttle there is still some hesitation but definitely not even close to what was before. The car doesn't choke any more and that weird loud (intake?) rasp is gone too.
I'm not sure if I posted it, but you could cleary hear it at the beginning of this video. I floored it in 1st at low rpm and it choked for a brief second at first - that's the issue everyone is refering to here. This is now gone
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10-30-2020, 02:55 PM | #53 | |
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Only did 1 drive on the second file and I am feeling like the first might have been better when launching it. I need to do a few more drives to tell for sure.
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10-30-2020, 06:10 PM | #54 | ||
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10-30-2020, 10:14 PM | #55 |
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I'm going to retract some of and add on to my previous post. It absolutely bogs until 2.5k rpm. Did a 3rd gear roll around 1/2 throttle, and that's all I needed to confirm. Took a video but it probably wouldn't help much. I honestly thought it was just the engine power curve but putting 2 and 2 together makes much more sense now. I'm also about certain the rasp is a byproduct of it.
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10-31-2020, 04:46 AM | #56 | |
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11-03-2020, 05:04 AM | #57 |
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So any updates from people that have gotten on the test file with alpine? Or has this issue died out? Still considering going with epic tune if this doesn't get resolved or just change out the whole system I'm running.
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11-03-2020, 06:49 AM | #58 |
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It's much better, the issue is 90% gone for me. I sent Alex some logs after testing revision #2. It's much more livable now. I just feel a very slight change at that rpm. It's not a hesitation anymore where the car stops accelerating. It's more of a change over like when Vtech kicks in.
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11-03-2020, 10:25 AM | #59 |
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What I'd like to see now is a comparison of the Epic tune vs Alpine tune w/ the BW x-pipe. I'm sure there's not much difference but it would be nice to compare the two.
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11-03-2020, 04:06 PM | #60 | |
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11-03-2020, 06:05 PM | #61 |
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How would you compare the two objectively? Usually dynos don't start until after 3k.
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11-03-2020, 06:52 PM | #62 | |
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11-04-2020, 03:28 PM | #63 | ||
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11-05-2020, 09:14 AM | #64 | |||
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11-05-2020, 09:23 AM | #65 | ||||
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You can ask every single person in the test group, I did not ask any of them for logs. The gentleman above and another gentleman from overseas volunteered their logs without me asking them. If you still keep in contact with your respected tuner ask if the transition period from part throttle to full throttle can be fixed through multiple logs. Yes, you will see the original problem in the log but at the end of the day only user feedback will tell you if the problem is fixed. |
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11-05-2020, 09:23 AM | #66 |
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that's a good point. I've not had a car dyno'd in a while. Not sure other than logs but even still, same environment, temps, etc. could wreak havoc.
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