I usually try to time my gas tank filling so that when I go to the track, it is pretty much empty. By doing this, I am essentially saving about 100 lbs. My 60' times have been in the 2.15-2.18 area pretty consistantly, but last weekend, I had a completely full tank when I went to the track, and my 60' times droped to a 2.08. My 1/4 stayed roughly the same, 14.12 before, and 14.15 w/full tank, with roughly ly the same conditions; mid 90's, 7500 - 8000' corrected elevation both times. So my question is, how do you guys run your cars? full or empty?

 

I try to run no more then 1/4 tank - to save weight but more gas can give better traction if you need some.

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91 B4C 305 TPI - SOON TO BE 383
TREMEC 5-SP, STOCK 1-BOLT REAREAND w/342 GEARS, K&N, AIRFOIL
EDELBROCK HEADERS, DUAL CAT TO HOMEMADE Y-PIPE & 3.5" SINGLE PIPE W/ FLOWMASTER, CRANK PULLEY, MSD, FUEL PRESS REG, COWL HOOD, WELD WHEELS
14.1@ 98MPH
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OTHER RIDE
67 CAMARO - STREET CAR, BIG BLOCK, PUMP GAS
350TH w/ATI 10", 12-BOLT w/373 GEARS
10.94@124.13 ON MOTOR - ET-STREETs w/MUFFLERS

 

I was wondering the same thing! I hook 5 times better with alot of gas. But I didn't know if it would affect my MPH..I know it affects handling..but who cares in a straight line! I can do a small burn out and LAUNCH with a full tank compared to doing a huge burnout and grinding second with empty.

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• Red '88 IROC 305 TPI T-5 w/3.08
• Accel 300+ Ignition
• Accel 300+ Pro Sleeve Plug Wires
• AC Delco Rapid Fire Plugs
• Dual Friction Stage III Centerforce Clutch
• Energy Suspension Transmission Mount
• Flowmaster Force II 3 Chamber Cat Back Exhaust
• Gutted Airboxes
• Hypertech Stage II PROM
• Hypertech Airfoil
• Throttle Body Coolant Bypass
• Best Maryland (40 degrees) E/T 14.686, 60' 2.205, 1/8th mile 9.461, 1/4 mile MPH 93.91
• Best Florida (80 degrees) E/T 14.88, 60' 2.163, 1/8th mile 9.540, 1/4 mile MPH 92.74
• Best 60' 2.163(Florida)
• TPiS AFPR set to 42psi using Accel Fuel Pressure Gauge (Installed after Maryland run)
• Aluminum Driveshaft (Installed after Maryland run)

I am looking to buy Edelbrock T.E.S. headers with the y-pipe. I am also looking for a 3.42 - 3.55 posi disc rear. cheesy@fred.net is my e-mail, send a letter if you can help!

 

Good, I'm glad someone else has had the same experience, but does anyone know the answere? It seems to me like if it turns out to be 6's, then you might be better off using an empty tank, as it would be les stress on your parts. But MAN, I sure have to tip-toe out of the hole w/ the empty tank. If I launch above 1200 RPM (roll-on throttle style) my tires go up in smoke. So, anyone one know for sure which is teh best route?

 

Unfortunetly, there is no right answer. You guys pretty much explained it yourselves. Gas weighs about 8lbs. a gallon. By filling the tank, you are adding 80lbs. @ 10 gal. That will help with the traction. However, that same weight will reduce your 1/4 mile times enough to make up for the gain of the times with better traction. That's why your e.t. stayed the same.

Confusing enough? I hope so.
AJ

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92 RS w/t-tops 305 TBI Auto.
170K miles and don't burn a drop o'oil
-K&N Truck filter #1500 w, open ele.
air cleaner
-Dynomax 2 1/2" cat-back
-B&M TransPak
-Jet Stage2 Chip
-180* T-Stat w/ 185* Fan Switch
-JVC CD--Alpine speakers & 4ch. amp
Rockford 2ch. to 2 MTX 12" subs

 

Chevy high performance claims gas is 7lbs per gallon, but who cares. Toss on some LCA's and new torque arm from spoon and hook up even better...

 

That's why I wrote "about 8lbs." Jeez. I was taught in science class in school that gasoline was 8lbs./gal. But that was 12 years ago when leaded gas was still around. Unleaded is more than likely lighter.

There, are you happy now?

 

And to be even more accurate, I believe unleaded is about 6.2Ibs, but who cares AGAIN, right?

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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

 

most guys I know drag with about a half tank. I guess this gets the best of both worlds

 

Hey, Up your tail pipe buddy. LOL

Seriously, I thought that was the weight of water. Are you now getting mixed up? Or no. I am.

WHHOOPPPSS!!!! Sorry. Gas is 6lbs. Water is 8lbs. Now I remember!!!!! I told you it was about 12yrs ago!!!!! See what beer does over the years.

I'm not as think as you drunk I am, Occifer.

 

Move your battery to the trunk. Not only are you getting better traction from the weight, your front end will lift quicker and plant the tires harder + the car will handle more balanced in the twisties.

And I second the LCA's and pinion angle at -4 degrees.