Ready for a Super Weekend at the Brickyard?

Continental Tire and GRAND-AM Road Racing join NASCAR for the inaugural Super Weekend at the Brickyard. For the first time ever on Friday, July 27, 2012, GRAND-AM Rolex Sports Car Series and Continental Tire Sports Car Challenge cars will compete at the Indianapolis Motor Speedway.Continental Tire arranged for Tire Rack to get a ride around the 13-turn IMS...  Read More

What Really is "One Lap of America?"

When I agreed to co-drive with Tire Rack sales specialist Joe Woodward in the 2012 Tire Rack One Lap of America, I had at least a basic understanding of what I was getting into. I knew that it was NOT what you think of when recalling Burt Reynolds and Farrah Fawcett in the famous “Cannonball Run” movie. While that movie was a hilarious retelling of some of...  Read More

Tire Rack's Own Take on One Lap of America

About two weeks ago, I (William Loring) had a conversation about the upcoming Tire Rack One Lap of America event with one of my co-workers, wholesale sales specialist, Joe Woodward. Joe has run in the event four times before in his Miata and I briefly asked if he was participating again this year. I let him know that if he needed a co-driver that I'd love...  Read More

Project STR Trophies in the Largest Class at the 2011 Tire Rack SCCA Solo Nationals

Whew, that was tough. The 2011 Tire Rack SCCA Solo Nationals, that is, where the STR class was the largest with 64 drivers going head-to-head; and man, oh man, was it a battle.We drove on the faster East course on day one, designed by GRM’s Andy Hollis. His course featuring a mix of transitions and fast sections had us to the rev limiter in three places. The...  Read More

Project STR races in C Street Prepared at the Solo Nationals

 Following the fun of our R-compound tire test, we thought it would be an interesting experiment to run the car in the C Street Prepared class at the Tire Rack SCCA Solo Championship event in Lincoln, Nebraska. Since our regular drivers can’t compete in more than one class we drafted GRM’s newest editor and long-time Miata owner Alan Cesar to make his first...  Read More

Victory at the 2011 Great Lakes Divisional Championship

Fresh off installing the new OS Giken limited slip differential it was time to return to where our wheelspin issues first surfaced – Grissom Aeroplex in Peru, Indiana for the 2011 Great Lakes Divisional Championship. It was at this event last year that we discovered wheelspin with the OEM limited slip differential. So we thought it only fitting to head back...  Read More

We tackle installing an aftermarket limited slip differential to help solve our wheelspin issues.

As we look through our comments in the log book, one that stands out is rear wheel spin as we try to accelerate to the next corner. We’ve worked on the KW coil-over suspension to try and increase rear end grip, and even tried different tires, settling on the Hankook Ventus R-S3. And while this has helped, at most event sites we can still slide the rear...  Read More

Hoosier A6 versus Goodyear Eagle RS AC Autocross Tire Test

Now that we’ve tried all of the fastest ST-class tires, we thought it was time to really step up the grip. So we decided to test some super-grippy 245/40R17 Hoosier A6 and Goodyear Eagle RS AC autocross compound tires. And as fast as our vehicle has been able to go on the Hankook Ventus R-S3 ST tires, the fastest of the R-Compound tires is still a full two...  Read More

Project STR Faces Some Tough Competition

Our lead project drivers Chris Harvey and John Rogers pointed the red Mazda MX-5 towards Toledo, Ohio for last weekend’s Tire Rack SCCA Northern States Championship. With lots of room, smooth concrete and high grip, this is one of the best venues east of the Mississippi. The two-day combined time event featured 50-second courses that were fast and relatively...  Read More

Comparing All of the ST Class Contenders

Trying to figure out what tire to run for the rest of the summer? Well deciding should get a little easier.Project STR drivers Chris Harvey and John Rogers headed out to the Tire Rack test track to put our MX-5 through its paces, comparing six different 245/40R17 Extreme Performance Summer tires (five options are listed below while the sixth was the Toyo...  Read More

AEM Cold Air Intake Installation

To help our little MX-5 breathe a little easier, we’ve installed an AEM Cold Air Intake.There is some debate about how to legally install an intake, which according to the rules cannot modify the structure of the car to route the intake pipe. Most off-the shelf CAI’s require modifying or removing a splash shield behind the bumper cover to get the “coldest”...  Read More

Project STR Competes in 4 Events in 3 Weeks

It's been a busy few weeks for Project STR as the summer race season has finally made its way to the Midwest with three back-to-back weekends of competition. First up was an outing to the Tri-State Sports Car Club event at the Sears Centre in Hoffman Estates, IL for a shake down on the installation of our new KW Clubsport suspension. Installation went well,...  Read More

Project STR Revs up for the SCCA Solo Spring Nationals

Memorial Day weekend 2011 will go down as the first time the SCCA has held a ProSolo and National Tour event over the same holiday weekend. We can’t think of a better place to host the event than the awesome Lincoln Airpark, home of the Tire Rack SCCA ProSolo Finale and National Championships. It appears many of our fellow Solo competitors agree, as the...  Read More

Project STR launches into the 2011 Pro Solo season

Tire Rack driver Chris Harvey pointed the Project STR Mazda MX5 550 miles south to Blytheville, Arkansas for our first SCCA ProSolo event of 2011. Co-driver John Rogers was tending to One Lap of America event duties so Chris was on his own to dial in the car and take on the solid, 12 car STR class field.The Friday test and tune course was put to good use as...  Read More

Project STR Roars Back To Life

After a long winter hibernating in Florida at the Grassroots Motorsports headquarters, Project STR finally saw some action this weekend at the Tire Rack SCCA Dixie National Tour in Cecil, Georgia. Tire Rack drivers Chris Harvey and John Rogers packed their bags and headed for Georgia to compete against 27 other drivers in the burgeoning STR class, which was...  Read More

Project STR Heads to the Performance Racing Industry Trade Show in Orlando, FL

After taking a few months off to rest up after the 2010 Tire Rack SCCA Solo Nationals, it’s time for Project STR Mazda MX-5 to head south for the winter. Leaving behind the snow and cold temperatures of Northern Indiana, we’re headed to Florida for the 2010 Performance Racing Industry trade show in Orlando later this week. This car isn't a trailer queen, so...  Read More

Project STR to Continue Development in 2011

Tire Rack and Grassroots Motorsports are excited to announce our drivers/test team will be returning in the 2010 Mazda MX-5 for another season of SCCA Solo competition and STR vehicle development. 2010’s competition success exceeded our expectations as the car and drivers scored: Three divisional championships Two ProSolo class wins Second place overall in the...  Read More

Project STR Scores Big at the Tire Rack SCCA Solo Nationals

This is what we’ve worked all season for –- to compete in the Tire Rack SCCA Solo Nationals on the wide open concrete of the Lincoln Air Park in Lincoln, Nebraska. Our lead drivers Chris Harvey and John Rogers were joined by former G Stock Ladies champ and Tire Rack team member Angie Rogers in the quest for glory in our bright red Mazda MX-5. Our team found...  Read More

Pro Solo Finale Event Results

Minimal cone usage on the wide open expanse of concrete provided a pair of deceptively challenging courses. Posing as simple elements, a variety of technical sections kept the field of 11 STR class drivers working overtime during the weekend. Eventual winner Ken Montonishi jumped out to a large lead right off the bat, and never looked back. Tire Rack and...  Read More

Project STR Gets Ready to Roll

It all comes down to this. We've tested, we've tuned, we've tweaked. We've done our homework and think we’re ready for the big dance. This is what we've been working for all year -- to see if our project can prove itself in autocross competition at the Tire Rack SCCA Pro Solo Finale and National Championship being held in Lincoln, Nebraska.Yes, we're towing...  Read More