10-09-2017, 05:48 PM | #67 |
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I found on my last track day that when the outside wheel spun the inside just didn't have enough to hold the car in the turn. Oversteer would happen, I don't see how the an LSD would help or make the situation work.
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10-09-2017, 06:20 PM | #68 | |
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A bit more context would be helpful. Was this on entry or exit? |
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10-10-2017, 10:42 AM | #69 | |
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the idea is the limit where the outside wheel would lose grip is higher, so you can apply throttle sooner and go faster. it's not that it would prevent you from oversteering. |
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10-12-2017, 08:36 AM | #71 | |
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11-10-2017, 09:19 AM | #72 | |
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OP I think my first track day was ~2000 bux without spending anything on mods. My take away from the track day was I spent a lot of money on unneeded power mods. Costs tires - 800 hotel - 250 inspection/alignment/mount tires/brake bleed - 650 school fee - 450 Ultimately you are in charge of your own budget. I think once I get my input and car control into a better state I can start trying to understand suspension issues, tracking a car is a progressive learning process if you stick with BMWCCA schools. Since I had all the bad habits, I spent my first school just trying to break those. |
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12-25-2017, 09:09 PM | #73 | |
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12-25-2017, 10:32 PM | #74 |
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In my case the stock suspension is so floppy it's untenable. The suspension is so surprisingly bad it must be removed (today) way before any driveline discussion.(I have the xdrive so haven't really got the need for the diff, though I believe the same part can be added and would help with throttle add out of a turn).
I have the arc8 18x8.5 et38 and PSS 255/40/18 in the mail for as soon as it stops snowing. I'll figure out the coils soon, I'm just not sure if that is all it will take (sway bars and I fear changing bushings may happen). The stock brakes are also too soft and spongy even. I may try a better fluid soon. But when the brakes are near end of life equipment changes there will be made. (I did not get the track pkg). Then we'll see about driveline (diff /mounts etc).. and finally a few extra hp. There's usually a logical order to fixing a car. I never would consider a diff a wear item.... Last edited by B58 parts; 12-25-2017 at 11:11 PM.. |
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12-26-2017, 12:50 AM | #75 | ||
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Not to get off the original topic but to complement, I'd throw in some caster/camber correction too, using eccentric bushings or equivalent: It will improve steering feel, reduce the center dead zone and providing greater agility for a few hundred bucks. Lowering in itself will provide a bit of both, but not nearly enough as these car come from factory with 0deg camber (could even be positive) and a caster designed to make steering feel light as opposed to communicative.
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12-26-2017, 07:29 AM | #76 | |
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Since you mentioned it, I have my brakes being changed tomorrow I really wanted to put the Brembo GT BBK on but couldn't justify the cost and decided to go with the M Performance kit. I actually don't think the stock BMW brakes on the sport line are that bad and certainly not a day 1 type of upgrade for me but got a steal on a M Performance set so I'm doing it. |
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12-26-2017, 07:39 AM | #77 | |
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I'm finding my biggest issue now is keeping the tires stuck on the road when I accelerate quickly. I'm running the stock OEM run flats which need to go soon !!!! |
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12-26-2017, 08:30 AM | #78 | ||
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IMHO we need -1 to -1,5 degrees of camber which isn't a lot but a good compromise. To stay straight under acceleration i think we need in addition to a better suspension - good tyres (for me that means switching to Michelin Pilot Alpin 4 for the season, PSS have as much grip as a bar of soap these days) - good alignment too to ensure straight thrust
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12-26-2017, 08:39 AM | #79 | |
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12-26-2017, 11:23 AM | #81 | |
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Camber LF= -0.7, RF = -0.6, LR = -1.6, RR = -1.5 degrees When you say -1 to -1.5, do you mean all the way around or just the rears? Thanks |
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04-28-2018, 08:00 AM | #85 |
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Now that winter is (finally) over around here, I'm going with new wheels and Michelin PS4S tires first.
Then DP/FMIC/CP and bootmod3 later this summer. Still haven't made a firm decision on coilovers vs. LSD yet, but will probably not happen until next year. I'm hoping Bilstein will have their B16 DampTronic available by then, in which case I may choose those over the LSD first. |
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