Tire Pressure : RT-615

LightWerkz · 09-02-2006, 07:25 PM

I just relized im going to be running on my new 245/45/17 rt-615's tmrw morning. Whats a good tire pressure to run at for auto-x on this tire?

battlecat · 09-03-2006, 06:20 AM

i found my rt615 (new) pushed alot. Checked and pressure was only 32 lbs.

I set them to 45 all around and big improvement. Start there. I might play with the back pressures. I find with DCCD in auto, the backend will start to slide out under increasing power, mid corner. Not sure if i can remedy that with tire pressure change in the rear or if there is just that much power.

LightWerkz · 09-03-2006, 01:51 PM

I stuck with 45 all around and it was grreat....

battlecat · 09-03-2006, 05:04 PM

Nice tire huh?

For the price i don't believe they can be beat. It was the best handling upgrade i've done to my car. After the pro tune the extra width is very nice to have.

suren27 · 09-05-2006, 06:01 AM

Im running 40 in the front and 37 in the rear, 235/40/18

SpYdEr2723 · 09-05-2006, 06:20 AM

42F 37-38R Although I am going to be playing around with those this weekend.

Puckshaw · 09-05-2006, 09:55 AM

So far I seem to be pretty happy with 43 F and 40 rear.

tphss · 10-01-2006, 08:09 PM

Isn't 45psi all-round too high?
I run 38F/37R.. Increase?

LightWerkz · 10-01-2006, 08:13 PM

Im pretty happy with 45 all around. On the track it felt great, and auto-x it kicks ass. I will play around with it though.

***VSGTS14*** · 10-02-2006, 06:22 AM

once they heat up you should really check them, running 45 is too high. they'll heat up over 50 i bet and thats max pressure.
i run 38f, 36r.

SSIXProject · 10-02-2006, 08:32 AM

Quote:

Originally Posted by VSGTS14

once they heat up you should really check them, running 45 is too high. they'll heat up over 50 i bet and thats max pressure.
i run 38f, 36r.

+1, Once they get hot the air is going to expand.

Mykl · 10-02-2006, 08:35 AM

At the track I tweaked them to be at 38 hot, all around. They felt very good at this pressure.

For autocross I went for 38 front and 35 rear, cold.

keyser_soze · 10-02-2006, 08:46 AM

245/40/18
34/34 f/r

i wonder if the higher pressure you guys using helps @ higher speeds

LightWerkz · 10-02-2006, 10:04 AM

Quote:

Originally Posted by VSGTS14

once they heat up you should really check them, running 45 is too high. they'll heat up over 50 i bet and thats max pressure.
i run 38f, 36r.

Sorry, I meant I run them at 45psi hot.

**T3h_Clap** · 10-02-2006, 11:11 AM

damn, i used to run 49+ hot in the fronts to keep them from rolling over.

the rears would get to 45 or so.

tire chalk is your friend.

then again i had 255/40s on my stock 8" wheel so i need to compensate for the extra sidewall flex.

09-02-2006, 07:25 PM	#1
LightWerkz STI Master Car: E46 M3 Fav Mod: ZCP Wheels Location: Clifton Posts: 7,464 IWSTI Addict since: Aug 2005 Trader Rating: (77)	Tire Pressure : RT-615 I just relized im going to be running on my new 245/45/17 rt-615's tmrw morning. Whats a good tire pressure to run at for auto-x on this tire? This ad is not endorsed by this member. Please register or login to hide this ad.

10-02-2006, 11:11 AM	#15
T3h_Clap Wheel33tist Whore Car: Aspen White GDF-D Fav Mod: Pastelito Racing / SFSOC Location: 0R!4ND0 Posts: 21,523 IWSTI Addict since: Dec 2004 Trader Rating: (7)	damn, i used to run 49+ hot in the fronts to keep them from rolling over. the rears would get to 45 or so. tire chalk is your friend. then again i had 255/40s on my stock 8" wheel so i need to compensate for the extra sidewall flex. This ad is not endorsed by this member. Please register or login to hide this ad.

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09-03-2006, 06:20 AM	#2
battlecat Junior STI Driver Car: 06 Subaru WRX STi: A Fav Mod: exhaust Location: winnipeg manitoba canada Posts: 145 IWSTI Addict since: Oct 2005 Trader Rating: (0)	i found my rt615 (new) pushed alot. Checked and pressure was only 32 lbs. I set them to 45 all around and big improvement. Start there. I might play with the back pressures. I find with DCCD in auto, the backend will start to slide out under increasing power, mid corner. Not sure if i can remedy that with tire pressure change in the rear or if there is just that much power.

09-03-2006, 01:51 PM	#3
LightWerkz STI Master Car: E46 M3 Fav Mod: ZCP Wheels Location: Clifton Posts: 7,464 IWSTI Addict since: Aug 2005 Trader Rating: (77)	I stuck with 45 all around and it was grreat....

09-03-2006, 05:04 PM	#4
battlecat Junior STI Driver Car: 06 Subaru WRX STi: A Fav Mod: exhaust Location: winnipeg manitoba canada Posts: 145 IWSTI Addict since: Oct 2005 Trader Rating: (0)	Nice tire huh? For the price i don't believe they can be beat. It was the best handling upgrade i've done to my car. After the pro tune the extra width is very nice to have.

09-05-2006, 06:01 AM	#5
suren27 Grassroots STI Racer Car: 05 STi Location: NYC Posts: 566 IWSTI Addict since: May 2005 Trader Rating: (5)	Im running 40 in the front and 37 in the rear, 235/40/18

09-05-2006, 06:20 AM	#6
SpYdEr2723 STI Driver Car: 04 WRX STi WRB/Gold Fav Mod: Race Seats Location: Albuquerque, NM Posts: 243 IWSTI Addict since: Sep 2005 Trader Rating: (2)	42F 37-38R Although I am going to be playing around with those this weekend.

09-05-2006, 09:55 AM	#7
Puckshaw Professional STI Driver Car: CGM 05 STi Fav Mod: High tensile moon noodles Location: Charlotte, NC Posts: 427 IWSTI Addict since: May 2005 Trader Rating: (4)	So far I seem to be pretty happy with 43 F and 40 rear.

10-01-2006, 08:09 PM	#8
tphss Junior STI Driver Car: 2004 STi Prodrive Tu Posts: 103 IWSTI Addict since: Jul 2006 Trader Rating: (0)	Isn't 45psi all-round too high? I run 38F/37R.. Increase?

10-01-2006, 08:13 PM	#9
LightWerkz STI Master Car: E46 M3 Fav Mod: ZCP Wheels Location: Clifton Posts: 7,464 IWSTI Addict since: Aug 2005 Trader Rating: (77)	Im pretty happy with 45 all around. On the track it felt great, and auto-x it kicks ass. I will play around with it though.

10-02-2006, 06:22 AM	#10
*VSGTS14* Muller Chevrolet Car: 08 Chevy 2500 Diesel Fav Mod: a new 09 STi Location: Milford, NJ Posts: 10,226 IWSTI Addict since: Oct 2004 Trader Rating: (11)	once they heat up you should really check them, running 45 is too high. they'll heat up over 50 i bet and thats max pressure. i run 38f, 36r.

10-02-2006, 08:35 AM	#12
Mykl S204 Racer Car: '04.5 STi Fav Mod: Whiteline steering rack bushings Location: Montgomery, Al Posts: 3,079 IWSTI Addict since: Apr 2006 Trader Rating: (0)	At the track I tweaked them to be at 38 hot, all around. They felt very good at this pressure. For autocross I went for 38 front and 35 rear, cold.

10-02-2006, 08:46 AM	#13
keyser_soze Professional STI Racer Car: WRB, 2005 STi Posts: 673 IWSTI Addict since: May 2004 Trader Rating: (0)	245/40/18 34/34 f/r i wonder if the higher pressure you guys using helps @ higher speeds