Quote:
Originally Posted by strat61caster
60-70 lbs. is not insignificant if you're serious, fighting for tenths of a second on a lap or a couple hundreds down a drag strip. Racing teams spend millions optimizing every piece to the minimum it needs to be.
They say it costs $10,000 to put a pound of payload into orbit around our planet.
Will it help you beat a Mustang to the next stoplight? Probably not. Will you feel it in the butt dyno as you floor it through the onramp on your way to work? Probably not. Will the car feel different at the end of a track day vs. the beginning? Absolutely, but that's not entirely due to the fuel burning off as track temperatures change, your tires wear and you either find a better line around the track or your reflexes start lagging.
tl;dr: don't worry about it unless you're racing competitively.
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You got me playing with a few numbers. I think on my next track day I'll start with <½ tank and add from a 5 gal. tank as required. Also, I'm going to try Torco Accelerator that's dyno proven to add ~2% hp on a n/a car. Together, I'll be looking at 3%-4% lb/hp gain when applied to a typical 15 sec. ¼ mile time could be worth 0.5 sec. and my home circuit has two straights per lap longer than that, more than enough time to overtake an equal car or two. All placebo effect, I'll let you know how it worked out next week.