Trying to start a Drag Racing and Autocross Challenge. Winner gets a free Autocross event!
Five events into the Autocross season Grant reflects on how the 335/30/18 size tires have affected his highly modified 2008 Mustang GT. We go over the issue of cold weather events and the inability to heat up a larger tire and some other obvious issues associated with having a car that is more than 5" wider than stock.
Photos by @Conedodger240
2009 was an interesting time for the 911. I was searching for a fun autocross car, and had been mostly shopping cars in the $10k range like E36 M3s and Mazda RX8s. A marketing anomaly known as Rich-People-Must-Have-the-Newest-911 meant that the outgoing 996 body style, made from 1999-2005, was now as valuable as a well-optioned Camry. The 997 was in, and gosh-darn-it it had those proper round headlights like the 993. And in 2009, that was apparently all anyone cared about.
Some poor bastard bought my 911 in 2004 for $98,000. It was a very special 911- not quite a GT3 but close. It was a 40th Anniversary Edition. Limited to only 1963 units (the year the 911 was first released), each "40 Jahre" car had a plaque on the console letting you know which number it was. I say poor because I'm sure he did not enjoy the X51 package (standard engine upgrade on the 40th, but a $17k option on regular 996s), the Limited Slip Differential (available only on the 40th and on some 1999 models with the smaller 3.4L engine), nor the club sport suspension as much as I have. I know this because he traded it in, along with its very sought-after matching luggage set, to a Mercedes dealer who sold it to me for a song. I still haven't forgiven those Mercedes bastards for swiping the luggage set. The car was low miles, mint condition, and besides breaking a pressure plate, it's needed only preventative maintenance.
I've upgraded it with Koni yellows and a GMG world challenge swaybar. I also deleted the mufflers to save weight and to upset the sound people at national autocross events, because it comes within tenths of a decibel of the sound limit.
This is not a car that you get in and drive; this is a car that you strap into and wear like a damned jetpack. No other car has ever felt so liberating as this one does.
Well the season is over and I just took off my 315/35/18 Hoosier A7s to see how they had worn.
I am more of a data oriented person so here are some facts on the tires and how I managed the wear through 2016
Cross rotated after every event
Flipped left to right after the 5th event (see below)
They are on a 2008 Mustang GT with significant weight reduction
Car weight ~3200lbs. 4x 18x10.5 Enkei PF01s 10mm Spacer up front
-2.9 Camber F, 0 Rear
1/16th toe out
7 Degrees Caster
Autocross and Track day runs
(6 runs) Amelia Island Airport
(5 runs) Florida International Rally and Motorsports Park
(6 runs) Amelia Island Airport
(6 runs) Roebling Road Raceway
(10 laps) Florida International Rally and Motorsports Park - Track day
(6 runs) Amelia Island Airport - Alignment out of wack
(6 runs) Amelia Island Airport - Spin out
(12 runs) Florida International Rally and Motorsports Park - Spin out
(4 runs) Brookesville Airport
(15 runs) Amelia Island Airport
Wear better than the A6?
Yes, without a doubt.
~66 total AutoX runs, 10 track day laps. VS ~61 Autocross runs on the A6
They also have almost no drop off. The A6 had, in my experience had significant drop off near the end of the tire life. (edit: They still had drop off but not as pronounced, at least in autox)
To also add the rears have at least 6-12 runs left in them. The fronts were most likely nuked due to doing 15 runs at the last event.
Worth the cost vs Street tires?
Probably not. They do mask some errors in driving and take longer to master. I still have much to learn. Though to stay competitive in a Mustang they are a must in my opinion. They were $1.722 shipped vs $1,358 for BFG Rival S 200tw street tires. So for ~$400 you can go a few seconds faster but sacrifice wear and obviously having two sets of wheels/tires.
The cost per run this season was $22. Haven't run street tires in awhile what was your cost per run? Write us!