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Author Topic: I rock race professionally but look to you for help  (Read 12708 times)

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Offline Nutz4sand

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Re: I rock race professionally but look to you for help
« Reply #60 on: March 17, 2010, 09:45:05 PM »
If you go to that link I posted the last two bottom charts are:

The first one is JUST the tranny ratios themselves. Transmission Gear Teeth (Ratios)
The second one is the tranny AND the primary reduction drop. Transmission Overall Ratios

EDIT: I stand corrected. The overall drop includes the chain and sprockets to the rear wheel as well as the primary reduction!!
« Last Edit: March 17, 2010, 10:22:22 PM by Nutz4sand »
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Offline BDKW1

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Re: I rock race professionally but look to you for help
« Reply #61 on: March 17, 2010, 11:45:53 PM »
And this is where I pipe up again with the stock Busa putting out 425FTLB's of torque in first gear.
 
I should have my buddy with a 4.3 and a bus box chime in and tell you what 220FTLB's of torque will do to one.............
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Offline Carlriddle

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Re: I rock race professionally but look to you for help
« Reply #62 on: March 18, 2010, 05:55:16 AM »
Quote from: BDKW1 on March 17, 2010, 11:45:53 PM
And this is where I pipe up again with the stock Busa putting out 425FTLB's of torque in first gear.
 

And since a typical buggy runs a larger rear sprocket, wouldn't that number be even higher. 
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Offline fabr

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Re: I rock race professionally but look to you for help
« Reply #63 on: March 18, 2010, 05:58:19 AM »
All 091's are CREATED equal. That is NOT to say all 091's are equal though. Many upgrades available.
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Offline fabr

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Re: I rock race professionally but look to you for help
« Reply #64 on: March 18, 2010, 05:59:33 AM »
Quote from: Carlriddle on March 18, 2010, 05:55:16 AM
And since a typical buggy runs a larger rear sprocket, wouldn't that number be even higher. 
OMG,here we go again. The answer is NO!
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Carlriddle

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Re: I rock race professionally but look to you for help
« Reply #65 on: March 18, 2010, 06:01:38 AM »
 :m aa:  just throwing some gas on the fire
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Offline fabr

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Re: I rock race professionally but look to you for help
« Reply #66 on: March 18, 2010, 06:10:12 AM »
 ;D ;D We're talking about INPUT torque to an auxiliary trans.  Adding in the sprocket ratios would be incorrect.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline BDKW1

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Re: I rock race professionally but look to you for help
« Reply #67 on: March 18, 2010, 09:47:14 AM »
Quote from: masterfabr on March 18, 2010, 06:10:12 AM
;D ;D We're talking about INPUT torque to an auxiliary trans.  Adding in the sprocket ratios would be incorrect.

Well, actually, you do have to account for any ratio change between the output shaft and the aux gearbox.
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Offline fabr

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Re: I rock race professionally but look to you for help
« Reply #68 on: March 18, 2010, 10:40:32 AM »
In this case there would be no set of sprockets and chain.If you're talking about a chain driven box then yes, you are correct.
Quote from: BDKW1 on March 17, 2010, 11:45:53 PM
And this is where I pipe up again with the stock Busa putting out 425FTLB's of torque in first gear.
 
I should have my buddy with a 4.3 and a bus box chime in and tell you what 220FTLB's of torque will do to one.............
There are no busas ,stock, putting out 425#' torque in first gear. 99#' stock peak tq @7000rpm times first gear ratio of 2.615 = 258#' at an output shaft rpm of2676 rpm.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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Offline Nutz4sand

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Re: I rock race professionally but look to you for help
« Reply #69 on: March 18, 2010, 11:07:10 AM »
Yah fergetted the primary drop too Fabr!
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Offline BDKW1

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Re: I rock race professionally but look to you for help
« Reply #70 on: March 18, 2010, 11:11:15 AM »
Yup ^^^^^^
 
I was using the facotory spec of 102FTLB's X 1.596 primary X 2.615 first = 425.7
 
Now slap your turbo on it and watch things get really out of control.........
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Offline BDKW1

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Re: I rock race professionally but look to you for help
« Reply #71 on: March 18, 2010, 11:18:30 AM »
From My experience with bus box's, if you left the Busa in 4th gear and shifted the bus box you would have a viable combo.
 
Anything with over 200FTLB's of torque will kill a bus box if you start to beat on it. If you drive really conservatively then maybe 250FTLB's.
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Offline fabr

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Re: I rock race professionally but look to you for help
« Reply #72 on: March 18, 2010, 11:22:50 AM »
You DO NOT add in or multiply the primary reduction in the calculation since it is already accounted for in the dyno data.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: I rock race professionally but look to you for help
« Reply #73 on: March 18, 2010, 11:31:05 AM »
A turbo busa with approx 160#' would put it into the range of what you are talking about. Even though it is pretty unlikely that you will see those torque numbers in first gear due to the engine not being loaded and therefore will make little to no boost. Likely be 3rd gear before that happens. In other words there will not be many first gear big boost burnouts or launches .3rd gear is 1.526 times 160#' = 244#'. Back to survivable range.
« Last Edit: March 18, 2010, 11:32:51 AM by masterfabr »
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline Nutz4sand

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Re: I rock race professionally but look to you for help
« Reply #74 on: March 18, 2010, 11:31:54 AM »
Two things.

First of when I have seen HP and Torque numbers its ALWAYS off the crank. I have not seen anything for the Hayabusa that suggests otherwise. Can you cite where this says its after the reduction and not before?

Second.

Although the motor WILL be making bucco torque in the low gears the speed is still kinda low on the output shaft at this point.

So unless you have perfect traction this will be bled off a good bit.

Its not like a BBC where its torque is being made off the crank at 5000 rpm or more.
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