justinco

Well I finally got my IS-F out for a fun day of autocross. My BMW (see sig) is my primary autocross car.

The F is a little bit out of its habitat on small/slow autocross courses, but it was still a lot of fun. Plan is to hit up some open track days and HPDE next with the car.

Justind27

iTrader: (6)

Nice! I ran my car at the 2015 Monroe wa hot import daze Autocross event, it was the 1st time drifting the car and I had just installed the giken/350 diff. I should get a gopro or something to take vids at events..

ISF4life

iTrader: (30)

Not bad for 1st timer gotta love the F .

justinco

Very cool! Yea the GoPro's are so awesome, amazing little cameras, highly recommended.

Well, I have been an autocrosser for many years, this was just the first time in the F Lots of videos of my STX BMW and stock classed Miata/RX-8 on my youtube channel

lobuxracer

iTrader: (2)

the F is pretty big and heavy for autocross. Definitely not it's strong point.

I8ABMR

I think the reason you were losing grip intially is that the tires were cold, you had a dusty lot, and the car weighs a tons, and the course is narrow as all hell. This makes taking an appropriate line through a corner much more difficult in a car that weighs 2 tons with a driver. HPDE is going to be much better and really suit the weight of the car . AutoX is easier for super light cars usually

chris07is

iTrader: (10)

looks fun, but I agree that F is meant for HPDE.

VMRWheels

Nice, looks like a lot of fun!

justinco

Yea not its strong point for sure, but it did do well considering the circumstances. I placed 8th out of 20 in the street tire index class (it was a BMWCCA event which uses SCCA PAX) and if I had good tires, I am pretty confident I would have been in the top 5. This is against a number of nationally competitive trophy winning drivers with SCCA that have setup cars.

But anyways, I can't wait to stretch its legs on a larger track for sure. Autocross just barely cracks into the power, but it does provide lots of lateral G's and transitions that you just don't get on a road course.

True, the tires may have been cold, however I ran in the second heat so course was dusted off and rubber put down. I think it was more of me learning to be more precise on the throttle with the F, or it would break loose. My BMW throttle is like an on/off switch and it just grips all the way, not so much on the F with all the power Yes, light weight cars are generally the way to go in autox, but there are plenty of big/heavy cars like the F that work fine. My primary autox car is 1000# lighter than the F, hah.

It was, thanks!

I8ABMR

The stock tire sizes mixed with the higher torque at low speed is a formula for over steer

justinco

Found a photo of the exterior from this autocross event. Still trying to decide what damn tires to get, argh.

I8ABMR

oem size all rouder PSS!!!

back up in oem or 245/275 RE11 #1, then #2Nitto NT05 ( the most track focused ), S04 Pole Poisition #3. Ive done a ton of research and these are probably the best options for a street car that does see some rain

gearcase

Good vid looks like fun .

justinco

I ended up going with Michelin PSS in OEM sizes. Finding something in 245/275 sizes was very difficult, and the ones I did find were just too expensive.

The PSS feels like an ok tire on the street. See how they at an autocross and track day before too long.

Thanks, indeed lots of fun!