Just saw this racing forum... Hello to fellow Fit racers.


Endurance














GK5 Challenge - F1 Track

 

Looks like a ton of fun! I wish I had the money and time to get into wheel to wheel racing.

 

1K a day.. no biggie..

 

I'm considering a GK for SCCA B-spec competition, but locating a manual LX is next to impossible. Honda HPD has no intent on offering a "white body" program similar to the Civic deal, so purchasing from a dealer and "prepping " from there is the only option.

The search continues

 

Are the wheels Konig Dial-Ins?

How do you like them?

 

Not sure if he has the Konig's but I've heard good things about them. They are currently the lightest 15x7.5 wheel available especially at a nice price. I'm considering them for another set on the track myself to run a 225" (limited to 7.5" due to SCCA STF class for autoX). It's hard to leave my Volk RE30's at 9.5lbs but they are only a 7".

 

Unless things change in the tire wars, you basically have two choices for STF. Either the RE-71R in a 225/45R17 or 225/50R16. I get that Bridgestone lists the measured rim width for the 17" tire at 7.5" but the tire will safely fit on a 7-8.5" wheel. You might get a couple more mm of contact patch with the 7.5" wide rim opposed to the 7" wide. The widest the RE-71R appear to come in, in the 15" is a 205? My Fit is just a daily. I run a WRX in DS locally. That being said, if I ever thought to run my 2017 MT Fit in STF, I'd want a larger diameter combo. Otherwise the courses I tend to run at would probably require 2nd to 3rd and back shifts? Personally, I like to shift into 2nd and just leave it.

BTW: I belive 949 Racing makes a 12# 15X7" wheel? I also read that Dunlop is going to have a Direzza Z3 tire this year. Not sure how it will compare to the RE-71R or what sizes it will be available in?

 

949 does make a 15x7 wheel but it has a really low offset! Like +25. You would need a roll and a big pull to fit those. Not worth it :/
They discontinued the 15x7.5+40 6UL option which would have fit perfectly for the car and STF class.

 

The RE-71R is the class leader now for 2 years. I'm VERY educated on this tire especially since I work for Bridgestone. I run a 15" wheel so both those 17" sizes don't apply for me. Yes the widest size in the RE-71R is a 205. The contact patch is fine on a 7" wheel at the moment. There is a possibility of seeing a 225/45R15 in the RE-71R for 2017 but that info will hit soon on new sizes. I have a GD and a 15" wheel is perfect for the car.

Yeah the 949 racing wheel is pointless for me since it is 2.5lbs heavier then my Volk's. The Konig is even lighter at 7.5" wide and a pretty solid wheel. There are a bunch of new tires hitting in 2017. ZIII, RS4, redesign of the Rival-S, I think Kumbo revamped the V720 compound for delame, N Fera SUR4, and a few more like Falkens new compound. It will be an interesting year.

 

Interesting...will Bridgestone release a newer 71r to combat all these new tires?

btw - I have the Bridgestone S001 that comes on the ND miata and i'm curious what 'Low Rolling Resistance' technology is actually in the tire and how much mpg improvement it has.

 

There hasn't been any talk about a newer compound for 2017. It has been the class leader for 2 years so until theres a new kid on the block I'm sure there's no reason to update. But I will say that most tires that come out a new compound/design is already in the mix. So I'm sure 2018 they'll be something but who knows.

As far as the S-001 goes typically its the compound that helps the low rolling resistance (LRR). It allows the energy that a tire develops to continue through the tire rather then rebuild energy as its lost throw tire/ground contact. Also the compound used has a special process called NanoProtech which helps internal molecular heat making the tire more efficient. It's so pretty high tech stuff that cost about a billion dollars to develop about 4 years ago.

 

That makes sense. I'm hoping the next iteration has a little more heat resistance. Tracking in Texas heat sucks. I look forward to whatever is next.

Wow that's cool. I wonder why it's in a tire for a miata though. LRR and roadster don't really go hand and hand.

 

Unless it was to increase the gas millage of the vehicle?

I haven't followed it in a long time since I really didn't care, but at one time 2016 was a year that car manufacturers had to increase the overall CAFE millage ratings across their whole lineup. I used to work for Chrysler and every 100# of weight savings they figured was 1 MPG. They seen that as huge and took great steps in weight reduction. The Dart had 3 floorpan redesigns that I'm aware of, one sunroof reinforcement redesign along with other part redesigns all to save weight and increase gas millage. Why do you think all the trucks are going aluminum body?

Besides most Miata owners will never push their cars hard enough to be at the limits of the tires. Those who autocross or do track days will change their tires anyway regardless of what it was equipped with at the factory.

 

CAFE law is set for 2025 for all vehicle manufacturers to hit an average of 51mpg so every little bit counts on vehicles.

 

I forgot about CAFE. That make sense. now to decide if i should continue with the S001's or try something else.

 

The S001 is a great performing tire. If you're looking for more grip the next level would be RE-11A or into the RE-71R as far as Bridgestone goes.

 

I love the tire so far, way better than hankook v12 or kumho escta le sport. I haven't tried the Conti's DW yet. I would like something with longer life, since i have a dedicated track wheels now. I haven't been able to determine how fast they wear yet. Bought the ND wheels/tires used.

 

Anyone try Toyo R888R 's ? ....... TOYO Proxes R888R 195/50R15 82V Tires Direct

More info ...... https://www.toyotires.com/tire/patte...petition-tires

 

I don't know anyone who runs Toyo tires other than kids who have watched Fast & Furious movies.

Most amateur motorsports in the US, usually just go with 200TW tires. If you autocross it's a minimum of 200TW to be considered a "street" tire. If you were to look at the 2017 Solo nationals results the two stand out tires that were used by probably 95%+ of the competitors were the Bridgestone RE-71R or the BF Goodrich Rival S 1.5. The latest generation of 200TW tires are as good if not better than the R888

Tire Test! Toyo R888R, and Hankook RS4 vs BFGoodrich Rival-S 1.5 ? tracktuned

 

I been running 205/50/15 R888R all year and I love them. You can push them as much as you want without having them grease up or go out. I wouldn't recommend using them for auto X as they take about 2 laps for me to get up to temp and proper psi. And by the way always take comments like the one RobH provided with a grain of salt. Just because one thing works really great for one person it doesnt mean you can apply it across the board. Driver experience and driver capability along with Weight of the vehicle, suspension setup, and power all play a role on how a tire will perform. Best thing to do is to try them your self and see if you like them.