Flipping the gears |
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Flipping the gears |
Bleyseng |
Jun 14 2003, 12:52 PM
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#1
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Well, I have been busy rebuilding a transmisson and went ahead with flipping 5th and 3rd gears for AXing. It's been interesting to say the least but not too hard. Here is a shot of the assembled gear stacks.
Geoff Attached image(s) |
Dave Cawdrey |
Jun 14 2003, 09:08 PM
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#2
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Dumbo going poop, Daddy :) Group: Members Posts: 818 Joined: 22-January 03 From: Seattle, WA USA Member No.: 182 |
QUOTE(TimT @ Jun 14 2003, 05:41 PM) Using the stock gears on the track or at an AX you will never ever see the "top speed" of the car. For a race car you gear the transmission so you can use all the gears. The 901 based gear boxes offer a wide range of gear choices. porsche designated them alphabetically A through ZD (I think) some gears are very rare and costly. A easy way to fill the hole ion your gear selection is by inverting a gear take a Z (29:23) and flip it you now have almost an M (22:29) There is no reason at all to have gears to go 155 mph if you dont have the power to get the car there. My cars are geared to a max of about 145, but I can use all 5 gears.... The RPM drops on each shift decrease in a good way... 2-3rd is about 1000, 3-4th is about 800 ,4-5th is about 600.. This keeps the car in its power band.. The faster the car is going the harder it is to push through the air.... hence wanting less rpm drops. close ratio gears lets you get the most out of your engine.. Tim, After reading your post, I am thinking that flipping or changing will benefit me (see my first thought above). See, I am building this car for a specific driver. He is an excellent driver. I feel comfortable sacrificing a little high end for a bit more torque and bite in the bottom end ONLY because he (the driver) can handle all the extra "squirliness" in the tight corners. Constant shifting (up/down) will be smooth thanks to Rennshift. So, am I correct in my thinking now? That, due to the fact that I could shift sooner, the RPM's drop less, and use 3rd and 4th rather than 2nd and 3rd. Then again, with the closer ratio gearing, you'd be finished shifting and have to start the next shift (IMG:style_emoticons/default/wacko.gif) |
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