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Underbody braces, turbos and more!

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PostPosted: Thu Aug 21, 2014 6:02 pm 
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At the moment I am running 205\50r15 and a gt tranny. I know the gt need better gearing. I have 4.39 waiting to go in. For future reference, what would be the optimal rim and tire combination for circuit use? 14in rim or 13in rim by 6 or 6.5 rims with which tires...anyone have any experience that would like to share? Thanks

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PostPosted: Thu Aug 21, 2014 8:05 pm 
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As small and light as you can possibly use and still get traction.

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PostPosted: Fri Aug 22, 2014 7:58 am 
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Location: Slovenia
in my country everyone use 14" wheels on swift for rally and circuit... for hillclimb some ppl use 13" but you can get almost same size 14" slicks
dunno for circuit, depends on car power and longest straight part of track but IMO 4.39 is still way too long :lol:
i'm using 4.92 on road (only longer 5th gear from gs) - 195/45/15 tyre
and friend used 5.45 or even shorter custom dog-box for rally 170 or 180/560/14 tyre


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PostPosted: Fri Aug 22, 2014 9:07 am 
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I converted to Honda calipers to make it easier to run 13's. I really like these Koenig 13x5.5's:

Image

They are just under 12lbs and were $45 each, shipped.

Unfortunately, the smaller you go, the more limited your rubber selection. Tires-easy must have picked up a shipment meant for Europe because I was able to get a set of Falken ziex-912 in 185-60 r13 that have been absolutely fantastic all-round tires (I wouldn't run them in the snow, and you won't get fast time of the day at the autocross, but they're even great on the track!). Unfortunately, I have no way to get any more of them :cry:

I think Nexen and Sumitomo still make decent tires in that size that you may be able to pick up, but I can't imagine that they are as good--but on the other end of things Toyo also makes their R888 tire in that size, which is a "streetable" race tire, if your car sees very minimal street use.

You lose some of the gearing advantage, but you can also mount Legends Car take offs, which are really just decent Federal street tires in 205/60 R13. If you know anybody who races Legends, they have strict treadwear rules and nobody has any use for them when they reach the limit so you can score as many free tires as you want.

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PostPosted: Fri Aug 22, 2014 9:13 am 
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If I were buying new tires today, these are the same tire as the legends, but new, not camber shaved, and in a better size:

http://www.avnmotorsports.com/product-p/148h3afa.htm


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PostPosted: Fri Aug 22, 2014 3:00 pm 
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Levon, i think I have a set of CRX calipers if you want to run 13's

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PostPosted: Tue Sep 09, 2014 9:04 pm 
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Gti I think ran a 13" originally 165/65R13?

I've been looking into doing a 15x8 rim with 195/45R15's. Did some calculations and it's just slightly bigger than stock 12". I figure a 195/45r15 would probably work for your application. Only slightly bigger than stock size I think.

Toyo proxy T1R ftw! =)

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PostPosted: Wed Sep 10, 2014 7:51 am 
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Location: Slovenia
bigbadmonster wrote:
Gti I think ran a 13" originally 165/65R13?

I've been looking into doing a 15x8 rim with 195/45R15's. Did some calculations and it's just slightly bigger than stock 12". I figure a 195/45r15 would probably work for your application. Only slightly bigger than stock size I think.

Toyo proxy T1R ftw! =)


i'm using 15x7 et38 rim for 195/45/15.. i wouldn't go for 8" wide rim..
atm i'm on second set of goodyear egale f1 gs-d3.. they last for about 10-11k km on front tyres..
i had one set of uniroyal rainsport 3, they were a little better than eagles but they were only for 3k km...
as much as i know, eagle gs-d3 are better than toyo t1r.. if you can still find them anywhere.. i got em for 75eur/piece in EU..
and if you're going for trackday or similar, toyo have r1r and r888 in 195/50/15 :)


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PostPosted: Wed Sep 10, 2014 8:34 am 
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Yea, I'm running 15x6.5in rims that weigh 15.5 lbs....way too heavy. I am running falken azenis 615k ATM they are awesome.....I heard something like the weight of moving parts, like rims being say 5 lbs too heavy effects the car as if it has an extra 200-300 pounds of dead weight.

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Modified B16 P29 75mm pistons,13:1CR, cultus intake, genie header, genie exhaust, 3tech head, 3tech 222/365 cams, 3tech UD pulley, megasquirt 2.0, 60mm throttle body, Aluminum flywheel


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PostPosted: Wed Sep 10, 2014 8:10 pm 
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bigbadmonster wrote:
Gti I think ran a 13" originally 165/65R13?


the oem wheel and tire was 185/60 14.

the suzuki 7 spoke mags weigh in around 11 pounds. the kumho tires i'm running on my white beater gt weigh around 14 pounds. in my estimation that is the best combination for the gti/gt cars. :wink:

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PostPosted: Wed Sep 10, 2014 9:11 pm 
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175 60 14

Geez, I'm getting tired of correcting you Richard :lol:

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