Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB

Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Tracking / Autocross / HPDE / Drifting (https://www.ft86club.com/forums/forumdisplay.php?f=39)
-   -   Robispec TIME ATTACK Build (https://www.ft86club.com/forums/showthread.php?t=28180)

robispec 03-03-2013 05:57 PM

Quote:

Originally Posted by RAWR BRZ (Post 761595)
I saw your car today on harbor and adams right by OCC lol. I thought wow someone with a super modded frs at OCC...what?? 777 on the back?? This guy tracks too!! Then while I was turning in I saw the Robispec sticker/logo and it all made sense haha. sick car btw

yeah I def. have a sickness! Thanks for the shout out!

Robi

robispec 03-03-2013 06:53 PM

I love going fast!

EAGLE5 03-26-2013 02:19 PM

I see you have slightly wider tires on the same diameter wheels. What do you think of going with either lower-profile tires and the same width you have now on 17's or switching to 18's or even 19s at the same width?

Captain Insano 03-26-2013 02:33 PM

This thread is awesome

robispec 03-26-2013 06:08 PM

Quote:

Originally Posted by jsimon7777 (Post 819503)
I see you have slightly wider tires on the same diameter wheels. What do you think of going with either lower-profile tires and the same width you have now on 17's or switching to 18's or even 19s at the same width?

Testing has proven that a non forced induction car with me in the seat is faster on 17" 225 with a enkei (LIGHT!) 8" wheel. the only reason to go to an 18" is if you had someone giving you tires and they didn't mind you losing. 19" are even worse...tires are springs and with geometry corrections in place so that the car distribiutes its weight transfer correctly SOFT IS FASTER...

Vonsamhain 03-26-2013 09:13 PM

I don't remember where I read it. But what's your take on front and rear bumper beams? Did you remove those? Do you remember how much each weighed and wether it made much a change in frame rigidity? I thought it was Robispec's car but can't remember.

robispec 03-26-2013 11:34 PM

Pulled both beams no change in stiffness.
Speedventures requires that we run at 2508 so we put the beam back in the rear.

Robi

Captain Snooze 03-27-2013 04:40 AM

Would you please tell me what rear lca and toe adjusters you are using?

robispec 03-27-2013 07:38 AM

currently stock.

EarlQHan 03-28-2013 07:43 AM

Quote:

Originally Posted by Vonsamhain (Post 820485)
I don't remember where I read it. But what's your take on front and rear bumper beams? Did you remove those? Do you remember how much each weighed and wether it made much a change in frame rigidity? I thought it was Robispec's car but can't remember.

On modern cars the bumper beams are for safety and damage reduction, they do little for stiffness. Plus a box shape isn't efficient for torsional stiffness.

EAGLE5 03-30-2013 07:26 PM

I love what robispec has done to the car. I also hate it because his goals are different from mine so most of his mods are useless to me, like the crash beam removal and suspension. At the same time, I can see getting those Enkeis and and the oil/water radiator.

robispec 03-30-2013 08:26 PM

Light weight aluminum beams in the works!

EAGLE5 03-30-2013 09:18 PM

Interesting, but hard to prove the safety of without a crash test or some serious computer engineering. Steel and aluminum act differently. If possible, go wider than stock for better offset protection.

jonnyozero3 03-30-2013 09:44 PM

Quote:

Originally Posted by robispec (Post 820130)
Testing has proven that a non forced induction car with me in the seat is faster on 17" 225 with a enkei (LIGHT!) 8" wheel. the only reason to go to an 18" is if you had someone giving you tires and they didn't mind you losing. 19" are even worse...tires are springs and with geometry corrections in place so that the car distribiutes its weight transfer correctly SOFT IS FASTER...

Robi -

Can you confirm the best wheel width you've found is 8"? I ask because your first post of the thread says you're on 17x9.0's...


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