Thunderhill Raceway 3/2/2013 (Video)

[sw20kosh]

Lots more fun around thunderhill (CA) in my lightly modified FR-S. Only new mod was custom cat back instead of a muffler delete, and a rear diffuser.

I was quite a bit faster out there this time around. I was focusing on being in the powerband more (aka. downshifting more) and I was a lot more confident in pushing entry speeds as Icemang will atest (he feels bad for my front tires). LOL

This time around I found much much more understeer with my set up. Only thing different was the diffuser. Even the tire pressures were the same. I had to take out 2-3 psi in the front to dial back the understeer. Looks like this may be a sign the diffuser is working? Maybe I need a front splitter now?

App/phone was not cooperating in the later sessions where I feel I was faster but here is a vid from the earlier sessions.

2:12
[ame]http://youtu.be/jQVYjPTfGb4[/ame]
_
_

Diffuser - http://www.ft86club.com/forums/showthread.php?t=30149

Relevant Mods:

RCE Yellow springs
-1.5 camber front
-1.7 camber rear
245/40/17 Hankook RS3's
Mach V Awesome 17x9 +42 rims
FT86 Factory 11lbs battery kit (20lbs savings)
Custom Magnaflow Cat Back (Burlingame Mufflers: Performance and Custom) (10 lbs)
Rear Seat Delete (20lbs)
Spare Tire + Tools Removal (30lbs)
~80lbs weight reduction



3 FR-S and 1 BRZ at the event. I was so happy to see them there!

[suaveflooder]

I can't wait to do this!!! How many miles on your car? I was planning on waiting until 7500 miles before I starting tracking mine, but I don't know if I can wait that long.

[Touge Monster]

Good times man sorry I couldn't make it still dealing with a family crisis stuck out in Hawaii now. Ill see you at Laguna Seca in May you are going the 19th right?

[icemang17]

to help reduce some front understeer try adding a bit more camber in front..might take camber plates.....also try reducing front and-or increasing rear pressure to help the car rotate.......do you know what the front-rear toe settings are? I would guess you are running a "street" style alignment toe settings so probably a little toe in all around.....I would try setting the front toe to zero.....this makes for MUCH faster-stronger turn in.....my racer has this with just a smidge toe in out back.... setting the rear to zero to slightly in also helps the car rotate....

Next time you can pit with me.....I have full alignment tools & can take tire temps to determine exactly how to setup the alignment....I take tire temps everytime I come off track.....

[sw20kosh]

Originally Posted by icemang17

to help reduce some front understeer try adding a bit more camber in front..might take camber plates.....also try reducing front and-or increasing rear pressure to help the car rotate.......do you know what the front-rear toe settings are? I would guess you are running a "street" style alignment toe settings so probably a little toe in all around.....I would try setting the front toe to zero.....this makes for MUCH faster-stronger turn in.....my racer has this with just a smidge toe in out back.... setting the rear to zero to slightly in also helps the car rotate....

Next time you can pit with me.....I have full alignment tools & can take tire temps to determine exactly how to setup the alignment....I take tire temps everytime I come off track.....

I took out pressure in the front for the 4th and 5th sessions and it stabilized the understeer.

Toe is 0 all around I think. I'll double check.

Thanks for the offer to Pit! That is awesome!

[Teo]

What is your setup for iPhone camera "harrys lap timer" ?
Where is installed?

[sw20kosh]

Originally Posted by Teo

What is your setup for iPhone camera "harrys lap timer" ?
Where is installed?

http://www.igloocase.com/

Case and mount. It is mounted to my rear window.

[Teo]

Originally Posted by sw20kosh

http://www.igloocase.com/

Case and mount. It is mounted to my rear window.

Thanks!