Ran my 07' WRX-TR last night... - Page 2 - Subaru WRX Forum
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#16 Old 09-23-2008, 03:27 PM
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You shouldn't be drastically cutting tire pressure on street rubber. Keep it at the factory specs.

04 STi 16G powered lagless fun
04 WRX: SOLD
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#17 Old 09-23-2008, 04:37 PM
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That is pretty fast. isn't that STi range in the 1.4 mile??? What do the stock wrx's run?

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#18 Old 09-23-2008, 05:18 PM
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Only dropped tire psi to about 30psi down from 35. I have seen stock WRX's(06-07) run a 14.0 at like 95mph stock. I guess the stock times for STI's are similar to what I ran.


-Joe

07 WRX TR-12.7@106
Invidia Catless DP,Invidia Catback,SPT Intake,Stage2Protuned,Large TMIC
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#19 Old 09-23-2008, 05:36 PM
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I have never felt a difference in launching with different tire pressures. I reduced my fronts from 35 to 30psi. But then again, i'm a FWD non-Subaru. So it's different. I have seen people at the strip adjusting their tire pressures for every run and I just don't see the point. Just show up, line up and run....

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#20 Old 09-23-2008, 05:38 PM
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If you have street rubber, your tire pressure isn't going to change much. If you have drag rubber and enough power where you can spin em, it makes a HUGE difference.

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#21 Old 09-23-2008, 05:52 PM
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^Okay thanks. If you had drag rubber on a WRX, I don't picture all that grip being very nice to your tranny or drive lines...

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#22 Old 09-23-2008, 05:56 PM
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Drag rubber on a relatively stock WRX would be silly. AWD has so much grip that you can't get much tire spin anyway. Drag rubber starts to be useful when you start to exceed ~100whp per powered wheel. That's nothing for even a stock RWD 4.6L Mustang GT but it's a ton for an AWD 2.5L subaru. Once you get to 200+whp per wheel or more, drag radials become almost a necessity to get even half way decent times for your power levels. How many 800+whp WRX's do you see though?

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#23 Old 09-23-2008, 06:04 PM
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Practiclly none. Is it even possible to push that much out of the 2.0??? The most I have seen is 600-700whp...

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#24 Old 09-23-2008, 06:27 PM
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There are the stroker kits and other methods to get there. I have read about several in the 790-810AWHP. One was complety stripped and everything though. Other guy said he cant use the power cause when it hits, its a rocket, and really slow before the turbo start spooling.

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"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Cobbtuning.com"
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#25 Old 09-23-2008, 08:16 PM
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idk, my tires at reg psi it spun a little too much for my liking. Lowered them and cut better 60's. best 60 I could get at full tire psi was a 2.0. Best on lower pressure was a 1.7.... but missed 4th on that run.

07 WRX TR-12.7@106
Invidia Catless DP,Invidia Catback,SPT Intake,Stage2Protuned,Large TMIC
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#26 Old 09-23-2008, 09:10 PM
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and what kind of tires were they? RE92s?

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#27 Old 09-23-2008, 09:14 PM
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Bridgestone Potenzas

07 WRX TR-12.7@106
Invidia Catless DP,Invidia Catback,SPT Intake,Stage2Protuned,Large TMIC
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#28 Old 09-23-2008, 09:15 PM
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which is about as specific saying they're made of rubber...

Just CURRENTLY being sold on tire rack with the name "Bridgestone Potenza":
Potenza RE-01R
Potenza RE070R RFT
Potenza RE050
Potenza RE050 RFT
Potenza RE050A
Potenza RE050A II RFT
Potenza RE050A Pole Position
Potenza RE050A Pole Position RFT
Potenza RE050A RFT
Potenza RE050A Scuderia
Potenza S-02
Potenza S-02 A
Potenza RE010
Potenza RE011
Potenza RE030
Potenza RE040
Potenza RE040 RFT
Potenza RE070
Potenza RE750
Potenza RE760 Sport
Potenza RE960AS Pole Position
Potenza G 019 Grid
Potenza RE92
Potenza RE92A
Potenza RE92A RFT
Potenza RE93

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#29 Old 09-23-2008, 10:28 PM
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LOL...Damn! Well, I would have to look tomorrow.

07 WRX TR-12.7@106
Invidia Catless DP,Invidia Catback,SPT Intake,Stage2Protuned,Large TMIC
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#30 Old 09-24-2008, 10:32 AM
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your lucky you didnt go to island! well it wouldnt matter to much for you... but the track was way more slick then the street! (i have rwd) but on the street i can get a big bark going into second but at the island i was going all the way through second!!! :eek:
good times by the way!
there was a guy at island with the black one, stage two gong like 14's and 99.. he can launch like a mother but woul donly shift at like 5000 lol... think that cars is missing driver mod...

2001 COBRA
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