General info for an uneducated AX'r, Primarily tire pressure |
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General info for an uneducated AX'r, Primarily tire pressure |
jd66921 |
Jun 6 2009, 07:30 PM
Post
#1
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Member Group: Members Posts: 316 Joined: 9-January 06 From: Texas Member No.: 5,394 |
Hi,
I've been doing AX's for a little more than a year. Currently I'm driving Howard's old car "Suzi". She's a pretty much stock 914 2.0l. She's been lightened a little. She has fiberglass hood and bumpers. All her heat and ventilation has been removed. Weight is 2050 lbs The engine is a stock 2 l as far as I know, and has an unmolested MPS. The transmission is stock. I do not know what kind of shocks are on her. The rears are yellow and do not seem to have any adjustments. The rear springs seem fairly soft to me? There are sway bars front and rear, I do not know what size they are. The fronts are adjustable with a number of holes in the horizontal arms. They are set to the center. I typically run about 10-12 seconds behind Corvettes, A Birkin, and a well setup Mustang Cobra. I am typically 3-4 seconds behind set up Miata's,etc. This is on courses that I would generally say favors the high powered cars. Generally, the courses are two 180's at each end, fast stuff down the middle, and most of the courses I can take flat out or with minimal lifting., except for the real corners, of course. Wheels are 5.5 inch Fuchs, with Falken Azeni RT-615's. My big questions is: I am now running 25 psi front and rear in the tires. Is that in the right ballpark? Should I go higher/lower, and why? The car feels good most of the time, with a little bit of mostly controllable oversteer. I can get some wheel spin off the line, and a little on right hand sweepers. What will changes to the front swaybar make? I've never understood them! I would prefer an answer like "increasing the front rate will increase grip" instead of "decrease over steer". Anyway, I seem to have reached the limit of my improvements without help, so I 'd like any help I can get!! Thanks, Jeff My first question is |
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