petesc
Part of things
more smiles per mile
Posts: 136
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Aug 31, 2008 19:27:55 GMT
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I'm thinking of getting another Fiat 126 and slinging in a bigger 4 pot engine and gearbox, the conventional way of doing this is to bolt an 1108 or uno turbo on the standard box which is a 4 speed and no syncro on first. My idea is to take a small FWD engine and gearbox And if its Do-able end up with this So my question is, is there any transverse engine and gearboxes that you can reverse the final drive, has anyone ended up with 5 reverse gears ;D Thanks Pete. Here a vid 126 turbo takes 38secs to start because of the titles but it is impressive.
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Aug 31, 2008 19:31:27 GMT
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2001 HONDA CT110 (NOT RCV)
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Aug 31, 2008 19:36:37 GMT
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sometimes its possible to turn the diff 180 deg around the pinion in a transaxle (like a beetle or a 2cv) to swap drive direction but fwd transverese boxes wont do that unfortunatly due to the way the driveline is arranged. How about taking an engine that rotates the "wrong" way (like some hondas) and mating it to a conventional FWD box to acheive the same effect?
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To get a standard A40 this low, you'd have to dig a hole to put it in
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Aug 31, 2008 19:45:42 GMT
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Scary, I was wondering about doing that with an audi trans for the back of my estelle!
Can they run backwards properly? do they 'undo' themselves?
As for your plan, What abouts street's solution of running the box upside down and making an adapert plate to do so?
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Aug 31, 2008 19:56:03 GMT
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in a transaxle, its only the diff thats running backwards, the box remains unchanged. It does mean that the bevel is running the wrong way all the time which will obviously increase the load on the bearings and shorten service life, but I've seen this trick used several times. I have wondered about the audi 80/100 trans too, but it depends what you find when you open it up, sometimes it wont work Alfasud ones for example, its physically impossible to turn the CROWNwheel cos of the shape of the castings (shame that, really)
I suppose turning the box over might work... but gives its own problems.. the diff (and shaft outputs) would be at the top, giving you some very odd shaft angles, and the problem of oil starving the bearings and dif while filling the selector area with oil.
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To get a standard A40 this low, you'd have to dig a hole to put it in
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Aug 31, 2008 20:06:27 GMT
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I have dome some looking up and the audi 80 etc trans can't have the diff flipped due to casting..... which is a real pain in the ass!
I can be run upside down though (its basically the same box as the porky 944's box!)
With a flipped fwd setup, the shafts might be at odd angles, and the diff may starve.... perhaps not a great idea then!!!
honda type r engine would be cool!
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Aug 31, 2008 20:06:35 GMT
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probably worth having a look under the bonnet of some japanese motors earlier mitsubishi's used to run engines and gearboxes in a reverse configuration so would be ideal for what your looking for
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noble 23 impreza wrx golf gti
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Aug 31, 2008 21:31:58 GMT
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trouble is most fwd boxes are on the end so will make it to wide, hillman imp engine and box might go in and they can really motor, is a metro turbo lump on top of the box like a mini? leant over backwards it might go in.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Aug 31, 2008 21:59:31 GMT
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your 2 diagrams the second you would have ended up with 4 reveres gears and 1 forward gear or am i being pedantic
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once again rocking with 1117cc and 4 gears!
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Tim
Posted a lot
Posts: 3,340
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your 2 diagrams the second you would have ended up with 4 reveres gears and 1 forward gear or am I being pedantic Read the text :-)
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Tim
Posted a lot
Posts: 3,340
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Don't some cars have blocks that sit over the gearbox?
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Do you really need back seats?
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berendd
Europe
why do I need 3 keys for one car?
Posts: 1,449
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the old DAF's and volvo 340's have gearboxes that will do the same speed in reverse as they do forward. unfortunately they are RWD allready and CVT..
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Ref the engine over gearbox question,
yes there are some engines that have the engine over the gearbox. The car i know that does this is the saab 99 with the 4 cyl engine similar to the dolomite triumph engine.
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rtlkyuubi
Posted a lot
Low and Slow
Posts: 2,922
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mk1 prelude has the gearbox on the otherside, with the block on the nearside and the gearbox on the far side.
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stealthstylz
Club Retro Rides Member
Posts: 14,924
Club RR Member Number: 174
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Wanted-5 reverse gearsstealthstylz
@stealthstylz
Club Retro Rides Member 174
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Sept 1, 2008 10:00:41 GMT
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You can flip the diffs in Renault UN1 transaxles, whether one would fit where the old transaxle goes is another question.
Matt
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Sept 1, 2008 10:08:43 GMT
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How about early Subaru boxes? the Leones came with FWD and I'm pretty sure it was a transaxle style box like a vw one.
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Remade In Australia thereimaginarium.com.au
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Sept 1, 2008 10:28:19 GMT
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check this one out for inspiration
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street
Posted a lot
6.2 ft/lbs of talk
Posts: 4,662
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Sept 1, 2008 12:41:22 GMT
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I reckon the best solution is to rotate the box rather than try and make it work backwards. I suppose turning the box over might work... but gives its own problems.. the diff (and shaft outputs) would be at the top, giving you some very odd shaft angles, and the problem of oil starving the bearings and dif while filling the selector area with oil. In my case I didn't have turn turn it 180 degrees, I only rotated it until the driveshafts were on the other side of the block, which means the diff and drifeshafts are still at the same height as origional With my gearbox the breather is on the side, so this wasn't effected by the rotating. The only thing i've had to block up is the speedo drive as that is now at the bottom! But that wasn't a problem for me because my front gearbox will do the speed reading. Didn't even need an adaptor plate in my case, just welded up the gaps where the mounting holes wanted to go and drilled and tapped them. No idea what problems might arise from doing this as i've not tested it! Can't see any problems really, fairly sure it will work. And if they're are any issues i'm sure it's fixable
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Sept 1, 2008 14:34:42 GMT
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Is there any mileage in finding a French style gearbox in front of the engine FWD box, as used in Citroen DSs and Renault 4s for example? I know they don't exactly grow on trees these days but they do turn the right way.
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"Jeremy Clarkson, a man we motor enthusiasts need on our side like Lewis Hamilton's F1 car needs a towing ball and a Sprite Musketeer" My motor
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