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> motorcycle engine powered 914?
WolfR32
post Mar 19 2008, 01:49 AM
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Has anyone seen one? Is it even possible?
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dug
post Mar 19 2008, 04:45 AM
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I have thought about it. Need to get the weight down as much as possible.
Hayabusa engine will run you about $3k.
There are several options for differentials with limited slip and reverse in the 2-3k range. DIY no-reverse solutions are possible. Pushing a 914 out of parking spots is no big deal:) See this thread: http://www.minibuggy.net/modules.php?name=...topic&t=261

Questions I don't have answers to:
How much less will the car weigh because of the engine swap?
How long will the transmission/clutch last with 1500-2000 lbs to haul around?
How light can you get the 914 with fiberglass fenders/hoods/bumpers/smaller gas tank/etc?
Would the drivability suck after all that $ and work?

Mmmmm, 13,000 rpm.

The engine I'd really like to see in a 914 is this hayabusa/powertec 2.6 V8:
http://www.powertecracing.com/

cheers,
dug
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Root_Werks
post Mar 19 2008, 07:44 AM
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Anythings possible with $$$ of course. Maybe put your sights on a Gold Wing engine? I know the trany's have reverse. (IMG:style_emoticons/default/idea.gif)
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rick 918-S
post Mar 19 2008, 08:00 AM
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Not enough torque. I'm working on the plans for a cycle powered vehicle but it will be scratch built. All light 4130 bird cage tubing and aluminum or glas skin.
Your asking that cycle engine to move a tremedous amount of weight compared to it's design intent. It would probably work fine until you tried to pull a hill and had to shift down a couple of clicks. First the stress on the engine would require alot more throttle, ie. more fuel. And that would likely be the end of the clutch.
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yenningComity
post Mar 19 2008, 08:53 AM
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Ive seen old mini coopers with them, but for a 914 it would need to be gutted. You would probably need fiberglass everything to boot.
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BIGKAT_83
post Mar 19 2008, 09:09 AM
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I look at a 1800cc goldwing engine as a conversion a couple of years ago. IIRC the max torque output was way higher that a 2L T4 engine at a even lower rpm.

Do a search for a Ultima Kit car with 2 Busa engines,one in the front and one in the rear all wheel drive,ran over 200mph and low 3 sec 0-60 times.
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yenningComity
post Mar 19 2008, 09:25 AM
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I don't doubt that the engine isn't fully capable of it, but the transmission? This idea has been discussed for the mr2 mki's quite a bit which weigh about what our cars do, and the answer was no due to the transmission issue.
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ericread
post Mar 19 2008, 02:30 PM
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Just think... Then we can add a sidecar!!! (IMG:style_emoticons/default/piratenanner.gif) I wonder how this would affect the AX classification?
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So.Cal.914
post Mar 19 2008, 02:37 PM
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QUOTE(ericread @ Mar 19 2008, 01:30 PM) *

Just think... Then we can add a sidecar!!! (IMG:style_emoticons/default/piratenanner.gif) I wonder how this would affect the AX classification?


Wouldn't that put you in the 'Outrigger' class?
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SirAndy
post Mar 19 2008, 03:24 PM
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QUOTE(WolfR32 @ Mar 18 2008, 11:49 PM) *

Has anyone seen one? Is it even possible?


no torque to speak of anywhere in the rpm range to move those 2300 lbs around ...

so, unless you want a total slug that sounds like a sewing machine on steroids ...
(IMG:style_emoticons/default/shades.gif) Andy
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swl
post Mar 19 2008, 05:07 PM
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Speaking of a sewing machine on steroids...
http://youtube.com/watch?v=3h8KdtuBBLM
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kart54
post Mar 19 2008, 06:03 PM
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Actually not a terrible idea. Several bike engines have more torque and more horsepower than a stock 2.0.
If I had a choice it would be the new Supercharged direct injected sea doo engine. 225 horsepower and 180 pounds of torque in a package that weighs substantially less than a porsche 4 banger. Shouldn't be to difficult to fab up a bellhousing and flywheel to mate it to the 901 transaxle and all the goodies are on the engine already in a compact package

Kart54
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Sparky
post Mar 19 2008, 06:40 PM
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Isn't that actually the Aprilla 1000cc? They are using it in the Can-Am Spyder.

QUOTE(kart54 @ Mar 19 2008, 08:03 PM) *

Actually not a terrible idea. Several bike engines have more torque and more horsepower than a stock 2.0.
If I had a choice it would be the new Supercharged direct injected sea doo engine. 225 horsepower and 180 pounds of torque in a package that weighs substantially less than a porsche 4 banger. Shouldn't be to difficult to fab up a bellhousing and flywheel to mate it to the 901 transaxle and all the goodies are on the engine already in a compact package

Kart54
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purple
post Mar 19 2008, 10:29 PM
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All torque issues aside, I remember seeing a review of those trike cars with the one wheel in the back and two in front.
The t-rex

http://www.youtube.com/watch?v=38TFetQAe2o

i seem to recall him saying that it's hard to drive because the clutch is meant to be operated with your hand, which has very fine control, where you have to operate that one with your left food, which is not even close in fine control. I think THAT would be more of an issue on a daily basis more than anything else. Neat idea...if you could use it on the 901 tranny
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HillKing
post Mar 19 2008, 11:05 PM
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Couple of bad ass Harley engines!!!
Would sound cool too.
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purple
post Mar 20 2008, 05:37 AM
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QUOTE(HillKing @ Mar 20 2008, 12:05 AM) *

Couple of bad ass Harley engines!!!
Would sound cool too.


take the exhaust off a type 4 and that's what you got!
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HeavyHeavy
post Mar 20 2008, 10:53 AM
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Just came across this:

http://www.carpenterracing.com/hayabusa.htm

Crazy HP for your motorcycle
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Rand
post Mar 20 2008, 11:08 AM
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If you built a TIV as high strung as these HO motorcycle engines, imagine the power you could have.

Even if the bike engine has adequate torque, my biggest concern would be breaking stuff. Motors and transmissions that are physically that small are designed to power bikes that weigh a fraction of what our car weighs. You suddenly add several times the weight to them, something is going to break. There's a reason bigger vehicles have bigger drivetrains. The parts need to be beefy enough to deal with the forces it takes to get that much weight moving quickly.
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LarryR
post Mar 20 2008, 08:31 PM
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I think this is extremely interesting. a 914 with a motorcyle engine would not weigh anywhere near 2300 pounds. I bet if you went with carbon fiber lids, race glass, carbon fiber seats, light weight carpet kit and a motorcycle engine you would be looking at somewhere around 1250 - 1500 pounds. A big honda goldwing must weigh at least 800 pounds.

I just think about the radicals that I have seen that absolutely fly with motorcycle engines. They sound incredible too.

Hope someone tries it (IMG:style_emoticons/default/beerchug.gif)
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Rand
post Mar 20 2008, 09:16 PM
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Unless you chop like URY, you won't get a 914 that light. It would be tough to get a street legal 914 under 1800lbs. And that extra 1000++ lbs is what's going to take it's toll on the motorcycle drivetrain.

But don't get me wrong. Let me be clear about this: I ENCOURAGE YOU TO DO IT!!!!! Woot. Do it! Show us!
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