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> AutoX tire pressures, Using road race tires for autox
jt914-6
post Sep 27 2010, 05:05 PM
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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:

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PeeGreen 914
post Sep 27 2010, 05:07 PM
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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)
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campbellcj
post Sep 27 2010, 10:49 PM
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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.
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ConeDodger
post Sep 28 2010, 01:25 AM
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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.
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PeeGreen 914
post Sep 28 2010, 09:59 AM
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QUOTE(ConeDodger @ Sep 28 2010, 12:25 AM) *

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.
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sean_v8_914
post Oct 1 2010, 07:42 AM
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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.
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jt914-6
post Oct 1 2010, 02:38 PM
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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)
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messix
post Oct 2 2010, 10:22 PM
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QUOTE(Phoenix 914-6GT @ Sep 28 2010, 08:59 AM) *

QUOTE(ConeDodger @ Sep 28 2010, 12:25 AM) *

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??!!
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jt914-6
post Oct 6 2010, 06:16 AM
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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)

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PeeGreen 914
post Oct 12 2010, 12:03 PM
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QUOTE(messix @ Oct 2 2010, 09:22 PM) *

QUOTE(Phoenix 914-6GT @ Sep 28 2010, 08:59 AM) *

QUOTE(ConeDodger @ Sep 28 2010, 12:25 AM) *

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)
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jt914-6
post Oct 12 2010, 04:05 PM
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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
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PeeGreen 914
post Oct 12 2010, 04:27 PM
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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.
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jt914-6
post Oct 12 2010, 05:03 PM
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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....
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