[an nguyen]

nice quad vid; here’s mine http://www.youtube.com/watch?v=ak6ANO6SWEY&feature=youtu.be

[an nguyen]

i guess i chose right in not stopping

[an nguyen]

http://www.rmsolo.org/rmsoloschool/index.html
no extra http for clicking
[quote=”jeffroberts” post=694]
[url=http://http://www.rmsolo.org/rmsoloschool/index.html]http://www.rmsolo.org/rmsoloschool/index.html[/url]
[/quote]

[an nguyen]

Nudged standing cones can be missed by even veteran workers so allowing drivers to stop/point it out is a convenient/practical solution.

Ps it’d be good to remind all workers near start/finish to run around not thru lights

[an nguyen]

thanks for the fun course/day!

[an nguyen]

i carry 1-2 full spares, the plugs are backup

[an nguyen]

that’s huge [is what she said =]; i carry a tire plug kit in each car just in case

[an nguyen]

thanks![quote=”Knio” post=553]Some pictures:

https://picasaweb.google.com/100783153791785225304/BMWGGCAutoX20120729?authuser=0&authkey=Gv1sRgCLrgipzsr_isxAE&feat=directlink%5B/quote%5D

[an nguyen]

congrats i was way behind http://www.youtube.com/watch?v=c8-jBXJqMKs&feature=youtu.be

[an nguyen]

thanks to all volunteers for a fun course!
ps were timing gremlins ever id’ed?

[an nguyen]

a lot of folks use oe mounts; I had ireland urethane for a while but don’t think it was better so went back to oe

[an nguyen]

i’d say difference will be plainly obvious to an intermediate AutoX’er.
v12 is not track worthy so your track guy is likely referring to kook rs3.

[quote=”macmacaman” post=298]Are we talking about a difference that is only noticeable at the hairy edge of stability, or will the difference be plainly obvious to an intermediate AutoX’er?

I’ve had a track guy recommend the Hankook’s, and have definitely heard a number of veteran AutoX’rs rave about the Star Specs.[/quote]

[an nguyen]

yes; i’ll add that some street tires squeal while others howl at/near the limit of their grip, so the sound you want depends. A coach riding shotgun may be able to suggest how loud your tires should be for max grip.

[quote=”CharlieDavis” post=243]That said, BMWs are often camber challenged, and understeer at lower (autocross) speeds, which is hard on fronts. Higher pressures will help, and camber plates will also help. New autocrossers tend to charge the corners hard and exacerbate the understeer issue. The phrase goes something like “Slow in, fast out. Fast in, out backwards”. That would be the part where the fronts finally find grip and the back is hung out to dry.

Tires with really small tread blocks tend to have more of a chunking problem. The individual blocks squirm around and tear themselves apart, especially on the outside edges of the fronts.

I would look into tires with larger tread blocks (I really like the Dunlop Direzza Z1 Star Specs), some negative camber and higher pressures (possibly over 40 psi) for autocrossing. I would guess that your camber is around zero to 1 degree positive and your car may have toe in. Up to -2 degrees is fairly friendly on the street and just a little toe in (maybe 1/8″) Other E9X autocrossers can help you with more precise numbers.

Then, take it a little easier going into the corners, try to get more of your turning done early (also known as late apexing) and accelerate out of the corner. If a street tire is squealing (high pitch), that’s okay, but as the pitch deepens into more of a squalling noise, the tire is being abused.

Charlie Davis[/quote]

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