08-12-2020, 08:16 AM | #617 | ||
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Yes, vibrations were present before the track day. The event made the issue twice as worse, though, and now when I am slowly coming to a stop, e.g. at the traffic lights, the braking force is so uneven that it makes my head rock forwards and backwards kinda like if I were pumping the brakes aggressively. So what y'all say I shall do? I have found a cheap new set of M Performance pads which I believe are RS29s, I could run those for a bit and see if they would scrub away the deposits? Rotors should still be fine in terms of their thickness, but I'd have to check that in detail. I thought the brakes would clean up on the rainy 300-mile cruise home from the track. Since the vibrations are so present, I don't want to keep driving it too much and possibly damage some of the suspension components that are taking a beating.
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08-12-2020, 09:56 AM | #618 | |
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In more rare and extreme cases, the uneven deposits could have created hot spots on the rotors that are hot enough to harden the rotor material in those spots, if that is the case new rotors are required. But as stated, it is quite rare.
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08-12-2020, 10:15 AM | #619 | |
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I have no problem managing the power delivery in Sport+ S3 DSC off when driving in the snow, so there’s no reason for it to be too sensitive on a dry track with R-comps. In Sport+ you do need to manage the throttle, you cannot just mash an go. In Sport, you can be more aggressive with the throttle because the programmed lag in the response does part of the throttle management for you. What I mostly dislike with Sport is the response lag on liftoff, which limits the ability to tuck the nose in to tighten the line when needed. Yes, the shifts in S3 are pretty aggressive to maximize performance. It has to be said that S3 is only suitable with DSC off, even in MDM the DSC cuts back power in S3. If you use MDM, S2 is the better choice. S1 is really tuned for comfort. In S1, the downshifts are super sluggish with no rev match.
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08-12-2020, 11:12 AM | #620 | |
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08-12-2020, 11:15 AM | #621 | |
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Repeat cold stops with the same pads that caused the deposits never worked for me, unfortunately. Possible it would have if the deposits were less severe. Switch to a race pad + cold stops/bedding sessions is the only method I found that worked. I know you tried to source and get fitted beforehand, but for future reference and those wondering about using stock pads on track, this is part of the reason why switching to a race pad -- even for novices -- is a good idea. This deposit situation is such a pain in the ass.
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08-12-2020, 11:53 AM | #622 | |
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08-12-2020, 12:14 PM | #623 | |
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Cold stops with race pads to clean up, bedding sessions to "reset" the system, achieve what you detail. Then again, defining exactly when cold stops become a bedding session is a challenge. Last time I went through this, a few hard "cold" stops in a row yielded much improvement. Couple rounds of that and was good to go. Race pad characteristics work in your favor here since it takes such substantial heat (a very intentional bedding session) to create a transfer layer.
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08-12-2020, 12:22 PM | #624 | |
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When the sudder is gone, time for bedding.
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08-12-2020, 12:35 PM | #625 | ||
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All this nonsense for some laps round a track! I'm trying to find whether there are some more track days in my country until the end of the summer, but it's looking pretty bleak.
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08-12-2020, 03:59 PM | #626 | |
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It's been mentioned a few times that the tire chirps aren't healthy for the tires, you're inducing a rapid deceleration on the contact patch. I've only had 1-2 issues with S1 going into the same corner braking 140->70 and dropping 5th to 3rd, and I timed the 4-3 downshift poorly. Otherwise single-gear downshifts under threshhold braking in S1 have not caused any problems. |
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08-12-2020, 04:53 PM | #627 |
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Having a 6MT was no doubt my dream but it is definitely a considerable disadvantage at track. I might be spoiled if I ever get to drive DCT on track. I would happily leave it full auto and focus fully on diving into turns. For same reason I avoid downshifting as much as possible.
Also I wonder how much GTS's power level closes gap against the 500hp Porsches on straight line? For my 425hp they are just as fast as Z06s in going away in straight. |
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08-12-2020, 05:38 PM | #628 | |
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I track my CS with the throttle in Efficient and the dct in 1/3 per James' recommendation. But this is the internet, I'm sure it's common knowledge that the throttle has to be sport+ and the dct 3/3. |
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08-12-2020, 05:39 PM | #629 | |
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08-12-2020, 05:50 PM | #630 |
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Have you guys seen this video? Jörg Weidinger driving G82 M4 manual. His driving it in Sport+ looking he does heel and toe if it works same way as F8X. Personally I think the throttle setting is personal preference that suits to one's driving style and what they want to achieve though.
edit, added comment: the video might have been taken for a show purpose of all that heel and toes and we don't know what Weidinger really prefers. He might be using efficient or sport throttle with auto rev-match and might not even downshift to 2nd that often when he is not being videotaped. Also going to 5th gear could be a show. For 6MT there is less freedom as rev matching is disabled with Sport+ throttle. I like sport+ and also I don't usually go down to 2nd gear so sport+ really helps on slow corners to bring up boost quickly. Last edited by MyFragileHalogen; 08-12-2020 at 06:32 PM.. |
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08-12-2020, 06:09 PM | #631 | |
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https://fastestlaps.com/comparisons/ml8uz863mop3 But perhaps 2018 and newer GT3 would be faster than the one above. |
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08-12-2020, 06:20 PM | #632 | |
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As for the DCT in S3 with R-comps, I might get an occasional chirp on 2-3 upshift, but never in higher gears, and rarely need 2nd on the tracks I frequent. So “tire chirping” has never been an issue for me. I am curious, have you ever upshifted mid corner in S3? You’d be amazed, the DCT knows you’re cornering and will execute a butter smooth upshift. It’s really amazing. I find the shifts, especially the downshifts super laggy in S1. This comes from a guy that uses Efficient and S1 on the daily drive, I’ve got nothing to prove on the internet, just share my experience...
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08-12-2020, 06:51 PM | #633 | |
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08-13-2020, 07:05 AM | #634 | |
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And those OE dubs...
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Manual adds another layer of difficulty to the process, especially learning a new track, but once you have shift points and corner gearing sorted it's not much of a disadvantage. Especially nowadays with the auto-blips. Enjoy the 6MT. Can't bring myself to run DCT in auto on track. Just doesn't seem right... and despite what I've been told by many who run full auto still doubt the car's ability to always know what gear is optimum for the situation. I'll try it in the GTS one of these days to see how close the car is to my timing and gear selections. Suspect it might try to kill me, though.
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08-13-2020, 08:36 AM | #635 | |
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08-13-2020, 12:32 PM | #636 | |
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08-13-2020, 01:01 PM | #637 |
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A sales associate at Carbahn Autowerks told me that Steve Dinan also tracks his cars in Efficient mode.
Last edited by drroc; 08-13-2020 at 04:07 PM.. |
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08-13-2020, 02:27 PM | #638 |
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Speaking of brake cooling, have you guys noticed that only the outer part of the calipers is changing color (i.e. turning green)? Inner side is almost the same original blue.
This does seem to imply that the outher side is not getting enough cooling (or the same as the inside at any rate), and I don't see what can be done about that.
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