View Poll Results: How much gas should be in the tank for auto-x?
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How much gas in your tank for auto-x?
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I have read various comments on how much gas autocrossers have in their tank but have not read anything as a consensus. I am just curious as to the pros & cons of the amount of gas that should be in the tank. I have driven with 1/4 tank and it felt light. I have also driven with a full tank of gas. Although it felt heavy, my rear wheels felt more planted on the course.
What is the ideal amount of gas that should be in the tank for auto-x and your reason why?
What is the ideal amount of gas that should be in the tank for auto-x and your reason why?
Last edited by z-u-later; 03-16-2007 at 10:02 AM.
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I like at least 1/2 tank or more , i dont know about the Z but with my old car if my gas was to low it would slosh and casue the chassis to be unstable in some corners.
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As far as the wheels feeling planted, I tend to do better with a copilot, esp. on asphalt. I run half a tank because I haven't made up my mind whether more weight is better or worse for tight courses and a torquey motor.
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Originally Posted by 12AutoX
As far as the wheels feeling planted, I tend to do better with a copilot, esp. on asphalt. I run half a tank because I haven't made up my mind whether more weight is better or worse for tight courses and a torquey motor.
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We ran a full tank and so did Chris Hammond.Based on our testing rear wheelspin out of corners was nearly eliminated with a full tank plus a big front bar plus 285/30 Kumhos plus proper shock tuning.The Z's advantage is at corner exit(torque and lot's of it) and you must do everything you can to reduce wheelspin.
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Hey, everyone! Great responses so far, and appreciate everyone who have voted. It really helps all of us who participate in autocross to understand the dynamics of how the amount of gas affects our Zs behavior on the course. Keep it coming and we certainly are continuing to learn from each other's vast experiences in this great forum.
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PDX makes a good point.We did use a delete tube(5 lbs) in place of the 35 lb muffler.Therefore a 3/4 tank would be the equivalent with a muffler.In either case you have approx an additional 90 lbs to help load those rear tires on corner exit.
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Originally Posted by tomsn16
PDX makes a good point.We did use a delete tube(5 lbs) in place of the 35 lb muffler.Therefore a 3/4 tank would be the equivalent with a muffler.In either case you have approx an additional 90 lbs to help load those rear tires on corner exit.
Damnit, now I'm going to have to try a full tank
<----------9.5 pound JIC full Ti catback exhaust
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We preferred using the fuel load to find the right weight to keep rear wheelspin to a minimum.All our testing kept telling us that a full or near full tank was best,even on the high grip concrete at Peru Ind,so we never let it get below 3/4.
Ballast per se not allowed in stock class.
Ballast per se not allowed in stock class.