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Author Topic: Fabr's Car-VW/busa crossbreed  (Read 265385 times)

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plkracer

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Re: busa/VW crossbreed?
« Reply #105 on: October 27, 2008, 11:25:17 AM »
Quote from: masterfabr on October 27, 2008, 08:39:41 AM
OK ,this is what I've come up with using Albin R&P(5.43:1) and Albin 3rd(1.5:1) and 4th(1.0:1). Assuming the busa is capable of turning 10500 in each gear which makes countershaft =6862 RPM with busa in (1.043:1)6thgear. Use 31" tires.Assume no tire slip in sand.
1st-3.80:1=30.66 MPH
2nd-2.06:1=56.58 MPH
3rd-1.50:1=77.69 MPH
4th-1.0:1=116.54MPH

 Look better? Albins makes a boatload of 3rd and 4th gear ratios.I'm open to suggestions on the ratios for 3rd and 4th.

3rd to fourth is going to be a leap. 1st to second gains 26 mph, then 2nd to third only gains 21, then you go up almsot 40 when you grab 4th. 2nd to 3rd will go quick, but you better rev it up to grab 4th. I'd space out third more (Lower ratio) .
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Offline fabr

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Re: busa/VW crossbreed?
« Reply #106 on: October 27, 2008, 01:00:11 PM »
OK ,this is what I've come up with using Albin R&P(5.43:1) and Albin 3rd(1.4:1) and 4th(1.0:1). Assuming the busa is capable of turning 10500 in each gear which makes countershaft =6862 RPM with busa in (1.043:1)6thgear. Use 31" tires.Assume no tire slip in sand.
1st-3.80:1=30.66 MPH
2nd-2.06:1=56.58 MPH
3rd-1.40:1=83.25 MPH
4th-1.0:1=116.54MPH

 Look better? Albins makes a boatload of 3rd and 4th gear ratios.I'm open to suggestions on the ratios for 3rd and 4th.
« Last Edit: October 27, 2008, 04:54:22 PM by masterfabr »
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Offline fabr

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Re: busa/VW crossbreed?
« Reply #107 on: October 27, 2008, 01:05:28 PM »
Albins also makes a boatload of 1st and 2nd ratios.
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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 Punkur67

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Re: busa/VW crossbreed?
« Reply #108 on: October 27, 2008, 01:30:33 PM »
Sounds like 5th gear might be a beter choice to get more bottom end.
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Offline fabr

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Re: busa/VW crossbreed?
« Reply #109 on: October 27, 2008, 01:44:56 PM »
Consider this:  Stock busa                178lb.ft.@ the countershaft
                    T'boed busa  @11#'s   290lb.ft.
                    Stock busa in 5th       194 lb.ft.   
                    Stock busa in 4th       219 lb.ft.
                    Stock busa in 3rd       260 lb.ft.

Admittedly it'd only run 73mph at redline in busa 3rd or 87mph in busa4th and 98 in busa5th  LOL!!! The point is that I feel the 091 is capable of being used this way.
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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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 " 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 Punkur67

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Re: busa/VW crossbreed?
« Reply #110 on: October 27, 2008, 03:14:49 PM »
Sounds like a great alternative to a fnr. Much easier to get one, get parts for, and get one built. For a built 091 you are looking at about $4000-$5000 but thats right there with the fnrs. And if you want to change your motor in the future your trans is ready to go, just bolt in a different motor. Master with those #s sounds like 4th gear might be the sweet spot. Not too much for the bus box and enough top speed.
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Offline Nutz4sand

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Re: busa/VW crossbreed?
« Reply #111 on: October 27, 2008, 03:20:47 PM »
One problem I see with this the way you are talking is you will never shift a 091 as fast (or easy) as you can shift the Hayabusa motor. Shifting any VW style tranny is usuallays the buggies (with it) biggest downfall if the tranny can deal with the raw power. 
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Offline fabr

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Re: busa/VW crossbreed?
« Reply #112 on: October 27, 2008, 04:49:18 PM »
Quote from: Nutz4sand on October 27, 2008, 03:20:47 PM
One problem I see with this the way you are talking is you will never shift a 091 as fast (or easy) as you can shift the Hayabusa motor. Shifting any VW style tranny is usuallays the buggies (with it) biggest downfall if the tranny can deal with the raw power. 
Yes you are correct about it not shifting like a MC dog style tranny for sure but unless you're racing short course I don't see that as a problem. I'm gonna make a call to albins tomorrow or the next day to see if they offer dog style gearsets for the 091. Their website hints that may be a possibility but I can't tell for sure. With all the gearsets they have I could do some real study and come up with a great set of ratios for first through 4th  that would compliment the busa torque curve nicely.
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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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 " 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 Engineer

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Re: busa/VW crossbreed?
« Reply #113 on: October 27, 2008, 04:58:50 PM »
I think generally you could get away with using the busa tranny for shifting through all the gears.  But if you decide to do a holeshot, or are going to be really leaning on it at slow speeds, you would be better to shift the busa to 5th or 6th, and shift with the 091 to keep from hurting anything.  The only problem will be remembering what gear everyone is in, and where to mount both shifters so that it is convenient.
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Offline fabr

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Re: busa/VW crossbreed?
« Reply #114 on: October 27, 2008, 05:09:36 PM »
Quote from: Engineer on October 27, 2008, 04:58:50 PM
I think generally you could get away with using the busa tranny for shifting through all the gears.  But if you decide to do a holeshot, or are going to be really leaning on it at slow speeds, you would be better to shift the busa to 5th or 6th, and shift with the 091 to keep from hurting anything.  The only problem will be remembering what gear everyone is in, and where to mount both shifters so that it is convenient.
Yeah I've been thinking along the same line but for the sake of this discussion I've kept it to the vw being the primary trans and the busa being the underdrive unit. I think I KNOW it will work that way and if so I'd move on to seeing what it would take using the busa tranny as the primary and the 091 as the underdrive as testing continued.
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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: busa/VW crossbreed?
« Reply #115 on: October 27, 2008, 05:30:04 PM »
They hold up to this stuff fairly well.

The following test involved the chopped turbo Ghia of Ray Mejia--he also brought the yellow Oval seen later in this article. The fairly heavy Coupe is well known for prowling the streets of L.A. and Orange County, and best of all it recently crossed the quarter-mile finish line in 10.84 seconds! The 7.6:1 CR 2442cc (88x94) uses a variety of high-performance components: Eagle 5.6-inch H-Beam rods, Engle FK-8 camshaft, CB Street Eliminator 42x37.5 heads, Turbonetics TO4 60-1 turbo, Demon 750cfm carb and MSD Digital-6 ignition control with Bosch 009 distributor. Ray's pink KG recorded 284hp and 309 ft-lbs. of torque with 28lbs. of boost.
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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: busa/VW crossbreed?
« Reply #116 on: October 27, 2008, 06:05:28 PM »
Ok I bought an 091 from Donsbusbox with 4.57 superdiff,Weddle gears.


 R&P(4.57:1) and Weddle gears 1st(3.44:1) 2nd (2.25:1) 3rd(1.78:1) and 4th(1.39:1). Assuming the busa is capable of turning 10500 in each gear which makes countershaft =6862 RPM with busa in (1.043:1)6thgear. Use 31" tires.Assume no tire slip in sand.
1st-3.44:1=40.25 MPH
2nd-2.25:1=61.55 MPH
3rd-1.78:1=77.80 MPH
4th-1.39:1=99.62MPH

Sounds pretty effin doable to me.Trans should be here in about a week.
Logged
"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: busa/VW crossbreed?
« Reply #117 on: October 27, 2008, 06:06:58 PM »
Oh I'll be using my cushion drive to couple the busa to the 091. In itself that should help the gearsets live.
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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 Engineer

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Re: busa/VW crossbreed?
« Reply #118 on: October 27, 2008, 09:21:35 PM »
Sounds good!  I can't wait to hear how it works out, and see your mounting.

Now that you have pulled the trigger and spent money I am sure the objections to the plan will be forthcoming...... gg:
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Offline fabr

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Re: busa/VW crossbreed?
« Reply #119 on: October 27, 2008, 09:45:19 PM »
But of course. :l
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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"
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