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Author Topic: What gearing should I use?  (Read 304 times)
106mm
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« on: July 28, 2010, 06:24:14 PM »
I'm gonna see how fast I can go with about 450-475hp. What kind of gearing should I use for the standing mile? I weigh 220 in full gear and I'm 6'2". My tuck WILL be better this time. lol
Any input is appreciated!
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« Reply #1 on: July 28, 2010, 06:41:22 PM »
Over drive tranny? Rev limit?
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« Reply #2 on: July 28, 2010, 06:56:08 PM »
Quote from: TrickTom1 on July 28, 2010, 06:41:22 PM
Over drive tranny? Rev limit?
Stock transmission gearing. I'd like to stay close to the stock rpm limit. I can give or take a little.
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« Reply #3 on: July 28, 2010, 07:21:42 PM »
what all size sprockets do you have?
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« Reply #4 on: July 29, 2010, 02:26:38 PM »
Quote from: TrickTom1 on July 28, 2010, 07:21:42 PM
what all size sprockets do you have?
18/38 currently. The front sprocket uses a larger billet output shaft (APE).
I'd like to take just one set of gears to the track. I'd rather not be changing gears all day. lol
Thanks for the help!
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« Reply #5 on: July 29, 2010, 05:24:15 PM »
pm sent
« Last Edit: July 29, 2010, 05:47:28 PM by TrickTom1 » Logged
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« Reply #6 on: July 29, 2010, 05:39:44 PM »
Quote from: 106mm on July 29, 2010, 02:26:38 PM
Quote from: TrickTom1 on July 28, 2010, 07:21:42 PM
what all size sprockets do you have?
18/38 currently. The front sprocket uses a larger billet output shaft (APE).
I'd like to take just one set of gears to the track. I'd rather not be changing gears all day. lol
Thanks for the help!

Just bring a couple sprocket carriers.  Wink
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« Reply #7 on: July 29, 2010, 05:49:07 PM »
Quote from: TrickTom1 on July 29, 2010, 05:24:15 PM

So do you think that would be a good setup with stock transmission gearing? My goal is 225 mph (anything beyond that would be AWESOME!!!!).
« Last Edit: July 29, 2010, 05:59:59 PM by 106mm » Logged
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« Reply #8 on: July 29, 2010, 05:50:23 PM »
Quote from: JHerheim on July 29, 2010, 05:39:44 PM
Quote from: 106mm on July 29, 2010, 02:26:38 PM
Quote from: TrickTom1 on July 28, 2010, 07:21:42 PM
what all size sprockets do you have?
18/38 currently. The front sprocket uses a larger billet output shaft (APE).
I'd like to take just one set of gears to the track. I'd rather not be changing gears all day. lol
Thanks for the help!

Just bring a couple sprocket carriers.  Wink
I used to drag race cars a lot and I got to the point where I was tweaking the car all day. I'm trying to keep it simple...and enjoyable. lol
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« Reply #9 on: July 29, 2010, 06:18:12 PM »
18/38 should be 225 @10800, 229@11000.
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« Reply #10 on: July 29, 2010, 08:22:21 PM »
Quote from: 106mm on July 29, 2010, 05:50:23 PM
Quote from: JHerheim on July 29, 2010, 05:39:44 PM
Quote from: 106mm on July 29, 2010, 02:26:38 PM
Quote from: TrickTom1 on July 28, 2010, 07:21:42 PM
what all size sprockets do you have?
18/38 currently. The front sprocket uses a larger billet output shaft (APE).
I'd like to take just one set of gears to the track. I'd rather not be changing gears all day. lol
Thanks for the help!

Just bring a couple sprocket carriers.  Wink
I used to
 drag race cars a lot and I got to the point where I was tweaking the car all day. I'm trying to keep it simple...and enjoyable. lol


Well then you should know already that it just don't work that way.   Hysterical
Aren't you on your 2nd major upgrade since turbo bike purchase? 
You're gonna be pissed if you blow through the rev limiter in 6th on the first day. 
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« Reply #11 on: July 30, 2010, 03:23:08 PM »
Well then you should know already that it just don't work that way.   Hysterical
Aren't you on your 2nd major upgrade since turbo bike purchase? 
You're gonna be pissed if you blow through the rev limiter in 6th on the first day. 
[/quote]
Ryan Schnitz and I talked (he tuned my bike) and we figured it out. Thanks to everyone for the help!
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« Reply #12 on: July 30, 2010, 06:17:22 PM »
 thumb
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« Reply #13 on: July 31, 2010, 09:27:13 AM »
19/38 will get you 225mph at 10,720rpms(ball park.. Razz )  That is real numbers, not spreadsheet BS....

With 475hp IF you can get it to bite you can run WAAAAYY more gearing....  A 20t front is probably as big as you will get under the sprocket cover.  Then run maybe a 36 or 37t rear..... That should get you enough for close to 240mph I would guess....atleast 235mph..

Good luck.. thumb

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« Reply #14 on: July 31, 2010, 09:45:43 AM »
A friend of mine ran 245 at Bonneville with 20/37 and about 300HP.
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« Reply #15 on: July 31, 2010, 11:09:59 AM »
Quote from: fvance on July 31, 2010, 09:45:43 AM
A friend of mine ran 245 at Bonneville with 20/37 and about 300HP.

Yeah exactly... thumb   475hp is good for 250mph+....  He will run out of gear WAY before he runs out of power.  Really need OD gears for over 235 ish.... You could run 235 with 350hp or less...theoretically anyway....You know how it really is in the real world.  Things are never as they "should" be....
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« Reply #16 on: August 03, 2010, 06:55:00 PM »
Giving serious thought to overdrive gears...
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« Reply #17 on: August 03, 2010, 11:07:43 PM »
Did someone recommend that last time you had it apart.... Wink
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« Reply #18 on: August 04, 2010, 07:52:40 AM »
Mark Deluca ran 245+ without overdrive gears,
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« Reply #19 on: August 04, 2010, 03:25:46 PM »
Quote from: fvance on August 04, 2010, 07:52:40 AM
Mark Deluca ran 245+ without overdrive gears,

He must have had 20/36 on it and a 12,000 limiter....lol

My 10,800 limit is a bish....
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« Reply #20 on: August 04, 2010, 03:30:53 PM »
No extended limiter!! Gearing chart says 20/36 at 10,800 is 264. I dont know what gear he was running.
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« Reply #21 on: August 04, 2010, 07:16:22 PM »
Quote from: Wolf1397 on August 04, 2010, 06:44:43 PM
I believe Bill is running stock ratios as well.  And he coasted to 273 MPH at Loring after his head gasket gave up the fight against two atmospheres. 

LOL no bill has some R&D OD gears..

I've ran 252 mph with stock gears with 20 /36 @ 10k ish on my little silver bike
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« Reply #22 on: August 04, 2010, 09:55:54 PM »
Sorry about the all caps lol Wolf was on my cell... I just chuckled when I read that guess it heard me Smile

Just wanted to make sure you knew I wasn't trying to be rude.   Wink

Shane
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« Reply #23 on: August 05, 2010, 01:16:07 PM »
I do believe Mr. Yancy's bike has/had a stock ratio transmission.
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« Reply #24 on: August 05, 2010, 04:24:47 PM »
I'm gonna stick with stock internals in the transmission, but I'll be taking a few different sprockets. I'm thinking 19, 20, 36 and 38. I'll also have a spare chain, links, etc. Thoughts?
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