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06-28-2010, 07:34 AM | #23 | ||
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06-28-2010, 08:33 AM | #24 | |
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Turn is is a lot quicker with the washers, and my outside tire wear has been reduced but not elimiated. I don't know what the long term wear is for daily street driving, as mine is a weekend car.
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06-28-2010, 12:08 PM | #25 | |
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I agree, on the street I don't think we'd want much more than -1.7 either, and the plates seem to be the thing to do for more/adjustability. But doesn't using plates bump you up a class for AutoX? I wonder if you could squeeze in another washer? I need to get under the car and see if the bolt/nut have enough length/thread to allow that safely--I think that's where you're going given you have the kit and are circling for F360C's kit I wonder if going "to far" with the additional washer option might adversely affect the suspension geometry given "where" the camber is being applied versus a camber plate? I seem to recall someone raising that issue or saying it was an issue--but I can't find the post/thread. |
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06-28-2010, 01:42 PM | #26 |
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I don't think putting too many washers will affect it since you have plent of adjustment in the postivie direction, the washers just shift the range of adjustment. Am I right in this thinking?
For example, sliding the top of the strut full positive might give you +1.0 camber, then sliding it the other direction -1.0 camber. Add the washers now sliding it full positive would only let you go to 0.0 camber but you could get -2.0 in the other direction. |
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06-30-2010, 11:01 AM | #27 |
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I have done these to my car:
1. Royal Purple SyncrhoMax (shifts better than factory fluid) 2. Royal Purple Max Gear 75W140 (LSD works effortlessly, more squeals from one of the rear tires when taking corner HARD. I guess it does help deliver power more efficiently as RP claims or maybe it was my mind playing a trick on me.) 3. Pulled alignment pin and had more aggressive alignment done 4. Flushed brake fluid to ATE racing fluid 5. went Dunlop star spec Z1 245/275 on stock rims 6. CDV deleted 7. Installed OEM strut brace. 8. Ferodo DS2500 front and Axxis ULT in the rear Now I love how the car drives and feels.
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2006 BMW ///M Roadster 6spd manual 2006 BMW 330i 6spd manual - gone Last edited by runnerx; 07-13-2010 at 10:00 AM.. |
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06-30-2010, 12:12 PM | #28 |
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07-01-2010, 10:05 AM | #29 |
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I think I got almost 1.8 with the pin pulled.
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07-01-2010, 05:30 PM | #30 |
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Thanks, that's where things were with the washer kit and pins pulled on ours. -1.5 seems pretty good for improved turn-in and balance on the street--might take that up to -1.8 next time around.
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07-01-2010, 08:04 PM | #31 |
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Who ever wants it can have it... you just gotta pay for shipping. I actually might have two kits cause I bet if I ask my brother he doesn't want his either
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07-11-2010, 07:50 PM | #34 |
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Ok, I just go back from an AutoX on the same surface as I ran before. This time I was not on the stock tires but on my Star Specs size 245/45 R18 on all four. So I elimated the stagger between front and rear and also have stickier tires.
The car had much better braking capabilityies today, but not as much as I would like. The car had a much better feel, less understeer but it was still present. The course was a short course, about 35 seconds and it was mostly tight, this is where the understeer was present. On one fast part which was a gentle left curve I could get pretty close to the top of 2nd gear the understeer was not as bad, failry decent. I really thought I would get more oversteer by reducing stagger by 30MM. Its possible that on a faster course this may be the case with this setup. Next week if conditions permit I will run with the BMW club on a much larger pad so speeds should be a little higher. I know I need some front negative camber, even just the stock setup with pins removed would help but I don't know how much I have right now. I may get it aligned before next week beore the event. I think I am real close to how fast I was in my 350Z roadster based on times of people I run with so hopefully I can improve it a little to get faster since this is only the second time in this car. One fustrating thing today is I got the 1st to 2nd gear grind in 2 of my runs, first time its ever happened to me so far. |
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07-12-2010, 06:41 AM | #36 |
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07-12-2010, 08:44 AM | #37 |
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Im on RE-11s and after chalking I settled the fronts around 30ish with the rears around 33ish. Going to dial it in some more at my next event. Im running a 225 square setup and this gave me just a bit of oversteer with my current alignment
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07-12-2010, 04:10 PM | #38 |
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I have 245/275 Dunlop Star spec as well. from my experience, they seem to like 39/38 (f/r hot). 33 will wear out the side wall super fast.
Having a little higher PSI than stock in the front will help minimize understeering and protect tire side wall. What I usually do is: first find the psi that will prevent eating into the front size wall, then adjust the rear to go with the front PSI. Too grippy in the back does not help the car rotate, rather it introduces more understeering. I found 39psi is the best for front side wall protection and rear 38psi best to rotate the car with the front.
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07-12-2010, 04:28 PM | #39 |
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Must be differences in tires... at those PSIs and chalking I still had about 1/2ish inch of chalk before I reached the sidewall <- unless my gauge is off.
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07-12-2010, 06:28 PM | #40 |
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Good info,
Runnerx, I noticed you have negative 1.8 camber. I am still stock so that is going to be my next step to get the most from the factory adjustability. |
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07-12-2010, 06:30 PM | #41 |
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My tire edges are worn down to the carrots already from my previous car. When I did lower the pressure up front I felt that I had more grip. I need to chalk it next time.
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07-17-2010, 09:28 PM | #42 |
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OK, I ran again Autox again today. This time with the BMW group on a much larger asphalt surface. Speeds were higher hitting 3rd gear on the backsside and top of 2nd gear several times. At the faster speeds my balance was much better with the square setup. Much easier to excert throttle oversteer. Overall a little understeer but not to bad, easily corrected with the right foot.
One thing I had a major problem with was shifting. First run out started off in first gear, tried to go to second in the turn and was denied. Had to for 3rd. Over and over I had problems shifting. Mainly when in 3rd I could not get back to second in hard braking or turning or about anything during the run. I was able to do it but not anywhere near when I wanted to. After the run I could do it no problem at all. I talked to everyone with E36 and E46 M3's, I was the only Z4M. All of them had upgraded their transmission mount bushings to the harder ones, most had had this same problem with their car. I guess than is in my future, I know there is a thread on this board about it. I did get the 1-2 grind at last weeks autoX. Overall the car was an absolute blast to drive today, felt much better. But very fustrating towards the end trying to get from 3rd to 2nd. Cost me easily 1.5 seconds or more. |
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04-13-2017, 06:13 PM | #43 |
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Hey All, I've enjoyed reading this thread, having all the same thoughts on this as you all did seven years ago. Fairly new to my Z4M and just completed my 2nd AX. I'm looking at my next mods which will probably be suspension. Are any of you still owning these cars ? Hi Finnegan and Kitty, I know you're still out there.
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04-14-2017, 11:00 AM | #44 | |
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This car is a bit of a handful and you will get better the more events you do. Quick comparison, I had the opportunity to drive an M2 at M school last year in autocross exercises, and while its an amazing car and handles very well in stock form, the Z4M is more of a challenge in the same setting. The only things I have actively changed for autocross was a 17" square set up since I'm cheap and desire to rotate tires since I do about 14 autox events a year (Kosei K1 with 255/40/17 200tw tires and spacers if your wondering) and added the turner camber shim kit for more front camber, which also was a pretty cheap mod. Also, did I mention more seat time? Start with better tires and a better alignment then go do more events! Remember, seat time is the best mod you can buy
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