Let me start by saying I don't claim to have a lot of experience with R-compound tires, I'm just giving a review in comparison to the BFG R1s and various 200TW tires I've tried. Ok, lets get into it.
These tires were pretty fast up to about the 60 run mark, but still not on par with the Hoosier cars. After 60 runs our PAX results were showing us falling down the rankings. Then in July of 2017 we finally installed a set of BC Racing coilovers and went out to try testing and tuning. We did 10 runs on the practice day and then 8 more runs at the championship the next day. It was about 90 degrees on Sunday and I noticed right away we had limited front grip. I had to drive the car like it had an open differential, and once again the PAX results told the story....slower than last time. After our runs I pulled the car into the paddock and removed the wheels....
This is a picture of one of our front tires, and you can see why we were experiencing a lot of understeer. The rear tires still had some life left, maybe one more event since a bit of chord was showing on the edges. But since we are trying to tune a set of coilovers we decided its best to toss them.
So in conclusion we think these tires were great, we got a trophy at the Match Tour and they lasted us a long time. With a proper suspension setup and maybe a better driver these could easily last to 100 autocross runs. Thats really good for a 40TW, since I was only getting 120 runs out of the Dunlop Z2s @ 200TW. Are these tires going to win nationals?-not likely. But they will give you a glimpse into the R-compound realm! So before you go out and drop $1000 on hoosiers, try these first and perfect your driver mod...they can take a beating and still provide lots of fun.
You can purchase these from TireRack;
I know what you're thinking. "The first set? C'mon really?"
Yes thats right! Believe it or not, at the time we requested a set of these coilovers from BC there were no products available for the Toyota Yaris. We had to wait 6 weeks for them to design and test fit the set they sent to us. The day they finally arrived we were all super excited to see what they built. You can check out the unboxing video above. Right out of the box you could tell these were high quality. Digressive valving and reasonable spring rates of 5k front/3k rear. There is a TON of ride height adjustability and the collars seem to be very sturdy, with the install and adjusting the rear ride height several times...not one tool mark was left. I've seen some low end coilovers locking collars become very damaged from regular adjustments. The damping adjustment is also phenomenal, the clicks are easy to feel and Ive noticed damping changes with only 2 clicks! If you take a look at the dyno graph from BC you can see the changes based on level of adjustment.
I then verified preload using this video HERE. I reused the TRD upper strut mounts I've had for a few years, and then installed the coilovers on the car. I used (2) sets of SPC Camber Bolts to achieve -3.4 degrees of front camber, and set the toe to zero. You can check those out here.
And here's the install time-lapse video below.
For road driving we set the damping at +10 front/+10 rear, and it feels similar to the Tokico setup. Our first real test on these coilovers was at SCCA SDR #7 where we did 18 autocross runs total including the practice day. Some damping adjustments were made but we ended up at +10 front/+17 rear and stopped seeing results due to our cycled out tires. We mounted some new tires recently so stay tuned for our next round of testing at SCCA SDR #8.
I'll also post a bunch of the Toyota torque specs here for anyone interested.
Over all these BC Racing DR coilovers are great, they have all of the right features and are fully rebuildable with Bilstein valves and Swift springs. The install is simple, and they don't make any noise while driving or racing. So far the customer support has been great, all of this for just a bit more money than the Megan, Ksport, or Fortune sets and absolutely worth the price so far!
Not a sponsored post.
Thanks so much for stopping by! Hope you found this useful!
So grateful for every single person involved in this project. There's never a bad time to sign up for autocross, get out there and have some fun!
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If you are also interested in purchasing these coilovers please contact Paul at www.CircuitMotorsports.net
You can also purchase these directly from BC;
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There are many ways we as enthusiasts can measure a builds potential or worthiness, but the way I've always looked at this is simple. Power-to-weight ratio minus the likelihood of failure factor. Lets say this factor is a scale from .010-.050, .010 being an oem engine while .050 represents a turbo kit thrown on a normally n/a stock engine running a base map.
If I had turbocharged the original 1.5L to 170hp, with the engine's power output being divided by the weight (2368) of the vehicle....we land at .072. I probably would have gotten a tune so lets say the reliability factor is .040. Subtract .040 from .072 and that leaves us at .032.
Now with the 2zr Im at 139hp with only a header, so the power to weight ratio on a full interior car is .058. and lets say the reliability factor is .015. subtract these 2 and you end up at .043. Risk assessment complete. So, now what can we do to increase our number without sacrificing any more reliability, this is a budget build after all...
I would like to start this blog by saying thank you to The Dyno Shop. They were punctual with my appointment, getting me on the dyno right away. They were careful with strapping the car down and I was provided a dyno printout with A/F ratio readings from the tailpipe.
Now lets talk numbers. Below you can see a dyno graph from a 2010 AT Corolla, also equipped with a 2ZRFE it puts down 119hp, 113ftlbs using an intake and full exhaust. You can view the video here:
Now going into this dyno day I had expected mid to high 120's from my 2ZRFE mainly because of the highly coveted RPM long tube header. And on top of that, when my buddy Arnel raced the 2zrVios last month with me...he mentioned it seemed low on power. I connected a SnapOn scan tool to the car and went on a test drive to verify the car was in closed loop and that the dual vvti system was fully functional...All was well. So lets see what the internet has to say:
People close to me know I'm not the car show type, I'll sometimes attend the local cars-n-coffee and anything that supports veterans but thats about it. This is mainly because I didn't build the 2zrVios to be a show car, its a race car. If I'm going to take the car and family somewhere for a whole day, to me it only seems worthwhile that I better be racing and enjoying the car how its meant to be enjoyed.
This year was different though, a few people on the forums and Facebook groups requested to see the 2zrVios at Toyotafest. I asked my friends, family, and sponsors for advice on this as this is unfamiliar territory for me. The consensus was unanimous, go for it. I signed up and let everyone know I was attending, then the search for a tow to Long Beach began. Right away my friend Juan agreed to tow us with his truck, so we rented a trailer from Uhaul for about $60.
It took about 2 hours to make the trip from San Diego to Long Beach, so we left at 5:30AM and that drive felt especially long at 55mph. After we arrived I drove the car off the trailer and over to the event with all of our gear inside, once in our spot I set up the canopy and went to get registered. In our registration goodie bag was a detail kit from Mcquires, that was a life saver since I don't own any of that stuff and the car has never really been detailed.
We got breakfast and coffee from the Crepes Bonaparte Food Truck, and man was that delicious!(we even returned there for lunch!). There were over 500 cars displayed so it took us a while to walk around and look at all of the cool builds. Every Toyota you can think of from 1970 up to present day was there; cars, trucks, vans, suv's, and a hand full of us race cars.
I made sure to make conversation with everyone that was interested in the 2zrVios, even some TORC staff members wanted to talk about the humble grassroots racing story behind this car. There was even a point where the Toyota media team came by to interview me on camera, asking why I chose this car. They said I may be included in a commercial, but because of my ties to Subaru I won't get my hopes up.
I also made a point to visit my friends at the Cusco booth to talk about how the Type-RS LSD has improved the car immensely. Kenji and Moto are vital parts of the Cusco team and I have tremendous respect for them.
Around 3PM TORC started giving out awards, and not surprisingly the 2zrVios didn't win anything. Honestly I'm not even sure what it would take to win anything from these events, nor do I really care. I enjoyed meeting and talking with the people that can respect the accomplishments of this car, we enjoyed the food, and now we can say we've attended Toyotafest!
We drove back home feeling accomplished, and looking forward to the next autocross event in June. Stay tuned as we are planning a track day at Big Willow in October! Check out the Toyotafest video down below.
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