another weight saving mod. gasoline?
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maybe? all i know is that my car is faster right after i filled up. like it picks up quite fast. on the other hand, when im about to fill, it is very slow and picks up like molasses.
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Rep Power: 0 racing with am empty tank is bad. you can cause fuel starvation especially in high G cornering... which would NOT be good for track times since your car will most likelt stall out on you in mid turn.
Yes, gas does add weight. A full tank (for ME anyway @ 12 gallons) is ~100lbs worth of extra weight. This is why real racing cars use smallish fuel calls which hold a smaller amount of gasoline, while preventing fuel starvation issues. Ill see if I can scare up the exact weight per gallon for regular pump gas.
Yes, gas does add weight. A full tank (for ME anyway @ 12 gallons) is ~100lbs worth of extra weight. This is why real racing cars use smallish fuel calls which hold a smaller amount of gasoline, while preventing fuel starvation issues. Ill see if I can scare up the exact weight per gallon for regular pump gas.
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Originally Posted by NAstage2
racing with am empty tank is bad. you can cause fuel starvation especially in high G cornering... which would NOT be good for track times since your car will most likelt stall out on you in mid turn.
Yes, gas does add weight. A full tank (for ME anyway @ 12 gallons) is ~100lbs worth of extra weight. This is why real racing cars use smallish fuel calls which hold a smaller amount of gasoline, while preventing fuel starvation issues. Ill see if I can scare up the exact weight per gallon for regular pump gas.
Yes, gas does add weight. A full tank (for ME anyway @ 12 gallons) is ~100lbs worth of extra weight. This is why real racing cars use smallish fuel calls which hold a smaller amount of gasoline, while preventing fuel starvation issues. Ill see if I can scare up the exact weight per gallon for regular pump gas.
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the specific gravity of fuel is .76 according to the majority of measuring systems used (jrfish007 can back me up on that).
water is 8 pounds/gallon. so 8 * .76 = 6.08, or, the weight of 1 gallon of fuel.
what do you mean by baffle the stock tank?
the specific gravity of fuel is .76 according to the majority of measuring systems used (jrfish007 can back me up on that).
water is 8 pounds/gallon. so 8 * .76 = 6.08, or, the weight of 1 gallon of fuel.
what do you mean by baffle the stock tank?
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Rep Power: 371 wow this is a good discussion.
Anyways, I'm experiencing the opposite to what you guys experience. I find that when I fill up my car completely it seems to run better and faster then when I only fill up halfway. I also seem to get better gas milage. weird.
As for autox. Can you guys not take Jerry cans? maybe fill up the car 1/4 and when you start running low... just fill up in the parking lot.
Anyways, I'm experiencing the opposite to what you guys experience. I find that when I fill up my car completely it seems to run better and faster then when I only fill up halfway. I also seem to get better gas milage. weird.
As for autox. Can you guys not take Jerry cans? maybe fill up the car 1/4 and when you start running low... just fill up in the parking lot.
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Originally Posted by gearbox
isn't the tank plastic? and where is fuel taken in?
Yeah, modern tank are plastic... baffling is very tricky to do effectivly though.
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Originally Posted by gearbox
Jerry cans, whats that. You mean Jerry springer?
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Last edited by R1Style; Aug 22, 2005 at 09:35 AM.
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Rep Power: 0 Getting back to the question of AutoX. You want to run as little fuel as possible so the car is as light as possible so it will be quick. Start at a 1/4 of a tank and see how you do. If you don't starve the engine you'll be okay.
That said, you can add fuel to help tune the suspension of a stock AutoX car. In the stock classes there is little you can do to tune the suspension. If your car is understeering as FWD will tend to do, and tire presure changes don't help enough, you can add fuel to increase weight over the rear tires. You will sarcifice top speed and accelleration for better handling. For most tight AutoX courses this is acceptable. Smooth driving through the corners usually wins.
I used to do this when I Autocrossed VW's. Since I switch to Honda's I was always able to manage with just tire pressure. YMMV. Indiviual driving style makes a difference.
That said, you can add fuel to help tune the suspension of a stock AutoX car. In the stock classes there is little you can do to tune the suspension. If your car is understeering as FWD will tend to do, and tire presure changes don't help enough, you can add fuel to increase weight over the rear tires. You will sarcifice top speed and accelleration for better handling. For most tight AutoX courses this is acceptable. Smooth driving through the corners usually wins.
I used to do this when I Autocrossed VW's. Since I switch to Honda's I was always able to manage with just tire pressure. YMMV. Indiviual driving style makes a difference.
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