Could you put a V-twin in a tiny car? - Page 4 - Hot Rod Forum : Hotrodders Bulletin Board
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  #46 (permalink)  
Old 10-18-2010, 04:34 PM
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Several come to my mind:
http://www.blackjackzero.com/pages/blackjack_zero.html
Caterham offers a Super 7 with a Hayabusa engine:
http://super7cars.com/Super7_Hayabusa_Caterham.html
Check out what this guy has done with a V-Twin and Bettle transaxle:
http://www.volksrods.com/forum/showt...ghlight=evolyn

Just about any engine that you can think of has been coupled to a Volkswagen beetle trans-axle. The cool thing about the beetle trans-axle is that it can be configured in front or behind of the engine simply by flipping the ring gear from one side to the other. It can be used in a front wheel drive car by changing the axles to the configuration of a front wheel drive car by adding CV joints and using the spindles from a front wheel drive car.

I have kicked this idea around in my head for several years but I have to work for a living so maybe I can build one in my next life.

Last edited by Chris Kemp; 10-18-2010 at 04:41 PM.
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  #47 (permalink)  
Old 10-19-2010, 06:56 AM
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Quote:
Originally Posted by Chris Kemp
Just about any engine that you can think of has been coupled to a Volkswagen beetle trans-axle. The cool thing about the beetle trans-axle is that it can be configured in front or behind of the engine simply by flipping the ring gear from one side to the other. It can be used in a front wheel drive car by changing the axles to the configuration of a front wheel drive car by adding CV joints and using the spindles from a front wheel drive car.
Do you have any idea on how big that transaxle is? It's looks pretty big to me...
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  #48 (permalink)  
Old 10-22-2010, 09:24 AM
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The biggest problem with these is that of coming up with a reverse gear. There are a couple of reversers on the market but they are generally very expensive or very weak.

We have a 954 Honda in a sand buggy that it very exciting to drive but lacks reverse. I have a reverser designed but not made yet.

Also drive shafts and spindle hubs are a bit of a trick to get strong enough for these big motors. We busted a couple of half shafts before we got it right.

We have gone thru quite few yards of chain too before we got the Gold ones. They stretch a little at first then they hold up very well.
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  #49 (permalink)  
Old 10-22-2010, 10:03 AM
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Quote:
Originally Posted by bentwings
The biggest problem with these is that of coming up with a reverse gear. There are a couple of reversers on the market but they are generally very expensive or very weak.

We have a 954 Honda in a sand buggy that it very exciting to drive but lacks reverse. I have a reverser designed but not made yet.

Also drive shafts and spindle hubs are a bit of a trick to get strong enough for these big motors. We busted a couple of half shafts before we got it right.

We have gone thru quite few yards of chain too before we got the Gold ones. They stretch a little at first then they hold up very well.
I'm not planning to put a reverser on it.
As part of my degree project I'm designing a new gearbox which will include a reverse in it.
I also plan to run a transmission bar to the back wheels and use a differential from a Triumph or an MG... (Not too sure about that yet...)
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  #50 (permalink)  
Old 10-22-2010, 04:09 PM
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V-twin in a tiny car

Quote:
Originally Posted by alviss
I'm not planning to put a reverser on it.
As part of my degree project I'm designing a new gearbox which will include a reverse in it.
I also plan to run a transmission bar to the back wheels and use a differential from a Triumph or an MG... (Not too sure about that yet...)
I don't know how big you plan on going, but snowmobiles have reverse in them.
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  #51 (permalink)  
Old 10-22-2010, 04:41 PM
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Quote:
Originally Posted by 35terraplane
I don't know how big you plan on going, but snowmobiles have reverse in them.
Down here in Florida we don't see many snowmobiles, but come to think of it they would be a good sorce of drive train for a micro car!
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  #52 (permalink)  
Old 10-22-2010, 06:21 PM
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Quote:
Originally Posted by westfaliaguy
I'm impressed with the discussion that lumberjacknooj has started with this line of inquirery! There must be 100's of web sites out there that address the conversion of bike engines into existing car chassis and hand built cars that use bike engines. There might be no end to it if one wants to keep on searching! Enough for me for now! I'll limit my program to putting a 400SBC in my 74 VW Westfalia. That's why my name! Have fun with your future vehicular customs. I'll stay with my current project! Yours, westfaliaguy.
Have you got any pics of the Westfalia . We'd all like to see it .
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Old 03-25-2013, 07:12 PM
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Definetly! But make it a Straight Four.

Quote:
Originally Posted by lumberjacknooj View Post
Just out of curiosity- I was wondering if it would be possible to drop a V-twin, like a large ci Harley engine or something, into a micro-car; Like a morris minor, or a mini. Obviously it would take some alterations.

Anybody have any input on that idea??

It would have to be a HP/TQ increase- a 96ci Harley has probably double the torque & horsepower of some of those little British 4 bangers.

Anywho- just daydreamin

Nooj
I'm building a 1972 AZ600, with a Kawasaki ZG1400 Concours four cylinder engine. It made 35 HP and will eventually make about 175 HP. My original idea was to use a big, honking V-Twin. The HDs are nice and the S&S engines haul booty. But a STOCK Yamaha Roadliner 1900 is a MONSTER! ... for a big twin-cylinder engine. It all depends on how much room you have to fit the engine and how fast you want it to be. For my purposes, the big V-Twins are just too freaking long to fit in the engine bay (even after cutting away the original firewall), they won't work well for sending the power to a rear end AND they just don't have enough NUTS. I want a water cooled engine (air cooling sucks inside all that sheet metal), lots of power and the ability to send the power back to a rear differential via driveshaft. Chains are unreliable and hard to fit for rear drive. I searched for a late model engine from a V-Max 1700, because they make HUGE POWER & TORQUE, but they're impossible to find. A look at a Legend Race Car shows the obvious choice. Stuff a straight four engine under the hood, with the output shaft of the engine pointing toward the rear. Unlike the Legend Cars, use a water cooled engine and hold on tight!
I have the car and the engine. Now the real engineering starts.
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  #54 (permalink)  
Old 04-03-2013, 12:58 PM
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The new Morgan trike (30s-style 3 wheeled car; 2 in the front 1 wheel in the back) uses an S&S V-twin mated to a Mazda MX5 gearbox I think. From the outside it looks like the rear wheel is belt driven, but Ive never seen a good photo and it could be shaft drive.

A snowmobile drivetrain offers a lot of advantages, including a CVT trans, great reliability and light weight. Id go 2-stroke efi like the old Polaris Indy 650efi. These were also liquid cooled and electric start, but I dont remember if reverse was an option for the 650efi triple.

Yamaha made a Vmax 2stroke 4cyl snowmobile for a few years....these things sound like an Indy car when you add tuned pipes.
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  #55 (permalink)  
Old 04-12-2013, 06:40 PM
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Hayabusa in a Smart Car.....
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