AutoX tire pressures, Using road race tires for autox |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
AutoX tire pressures, Using road race tires for autox |
jt914-6 |
Sep 27 2010, 05:05 PM
Post
#1
|
Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
Alright you autox guys.....I'm going to do an autox this next weekend and I plan on using my Yokohoma Advan A048 road race tires. I figure they are better than the Yokohoma ES 100 street tires I use on the street. I don't autox often and am not going to get autox tires. In fact I haven't done an autox in the 914 in several years, I'm doing DE's with the car. My question is what cold tire pressure front and rear should I start with? Also, I'm picking your brains, only have front sway bar. Leave connected or disconnect? Using adjustable Koni's front and rear. Go all the way soft? Maybe between soft and full hard? (get your mind out of the gutter and after this go to the sandbox).....
The car is a six with flares. 7" fronts/225/50/15 and rears are 8" 225/50/15's. The car weighs about 2250lbs. Any input would be helpful...... (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/driving.gif) The tires look like this: |
PeeGreen 914 |
Sep 27 2010, 05:07 PM
Post
#2
|
Just when you think you're done...wait, there is more..lol Group: Members Posts: 10,219 Joined: 21-September 06 From: Seattle, WA... actually Everett Member No.: 6,884 Region Association: Pacific Northwest |
Never used those tires but I found with my previous 914 that 27lbs was a good place to start and then you could go from there. Have an air tank close in case you need to add some but you may find you need to take more out.
Good luck (IMG:style_emoticons/default/smile.gif) |
campbellcj |
Sep 27 2010, 10:49 PM
Post
#3
|
I can't Re Member Group: Members Posts: 4,574 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
I would check the Yokohama web site for pressure info. Just keep in mind their recommendations may be for track use. You will not build heat as quickly in autox and probably not as high temps in general, or as much pressure gain as a result.
|
ConeDodger |
Sep 28 2010, 01:25 AM
Post
#4
|
Apex killer! Group: Members Posts: 23,758 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
Don't you dare unhook your front sway bar. If you had a rear you might hook it up but the jury is about equal on the necessity for that.
|
PeeGreen 914 |
Sep 28 2010, 09:59 AM
Post
#5
|
Just when you think you're done...wait, there is more..lol Group: Members Posts: 10,219 Joined: 21-September 06 From: Seattle, WA... actually Everett Member No.: 6,884 Region Association: Pacific Northwest |
Don't you dare unhook your front sway bar. If you had a rear you might hook it up but the jury is about equal on the necessity for that. (IMG:style_emoticons/default/agree.gif) I don't like the rear bars with the 914s and good rubber but a front is a MUST. |
sean_v8_914 |
Oct 1 2010, 07:42 AM
Post
#6
|
Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
tire temps will tell you where to set the pressure. measure outer edge, middle and inner edge as soon ass you finish a lap. have a friend do it ASAP.
|
jt914-6 |
Oct 1 2010, 02:38 PM
Post
#7
|
Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
Thanks for the replys....I'll be doing the autox Sun....just doing it for fun...don't want to look too serious taking tire temps.....just for fun and scare the hell out of my girlfriend who will co-pilot..... (IMG:style_emoticons/default/icon8.gif)
|
messix |
Oct 2 2010, 10:22 PM
Post
#8
|
AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
Don't you dare unhook your front sway bar. If you had a rear you might hook it up but the jury is about equal on the necessity for that. (IMG:style_emoticons/default/agree.gif) I don't like the rear bars with the 914s and good rubber but a front is a MUST. "must"???? hahaha...... realy??!! |
jt914-6 |
Oct 6 2010, 06:16 AM
Post
#9
|
Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
Had fun at the autox. Didn't scare my girlfriend...though she had taken motion sickness med.....used my track skills with countersteer to correct extreme oversteer in a corner.... (IMG:style_emoticons/default/driving.gif)
|
PeeGreen 914 |
Oct 12 2010, 12:03 PM
Post
#10
|
Just when you think you're done...wait, there is more..lol Group: Members Posts: 10,219 Joined: 21-September 06 From: Seattle, WA... actually Everett Member No.: 6,884 Region Association: Pacific Northwest |
Don't you dare unhook your front sway bar. If you had a rear you might hook it up but the jury is about equal on the necessity for that. (IMG:style_emoticons/default/agree.gif) I don't like the rear bars with the 914s and good rubber but a front is a MUST. "must"???? hahaha...... realy??!! Yes, your car is a perfect example of what happens when you don't. Did you ever buff the road marks off your mirrors? (IMG:style_emoticons/default/poke.gif) |
jt914-6 |
Oct 12 2010, 04:05 PM
Post
#11
|
Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
No rear bar....done both and I don't like using a rear bar....surface was a little sandy/slippery.... http://www.youtube.com/watch?v=FoCxD9TSxmA
|
PeeGreen 914 |
Oct 12 2010, 04:27 PM
Post
#12
|
Just when you think you're done...wait, there is more..lol Group: Members Posts: 10,219 Joined: 21-September 06 From: Seattle, WA... actually Everett Member No.: 6,884 Region Association: Pacific Northwest |
Car looks great out there. No rear bar required (IMG:style_emoticons/default/wink.gif) Troy is just being a smart ass because he doesn't have any bars on his and it sways like a ship in a monsoon.
|
jt914-6 |
Oct 12 2010, 05:03 PM
Post
#13
|
Driving & working on teeners 41 years Group: Members Posts: 1,786 Joined: 3-May 08 From: Bryant, Arkansas Member No.: 9,003 Region Association: South East States |
Thanks....I had not autox'd a 914 since the early 90's....Last autox before last week was three years ago in the '07 Vette...I was about two seconds behind Jay Jackson who was third in FP at the nationals....not bad for a street/DE car on road course tires against a regular autox'er in a all out autox 914....
|
Lo-Fi Version | Time is now: 27th September 2024 - 02:29 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |