taylorboosh
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quote:
Originally posted by Ian
Not clear about flipping the gearbox. Surely if it gives drive in sympathy with the crank when its bolted up as standard then it still will if you rotate the housing?
yes the gears would run the same but the shafts would be on the wrongside making it run back to front
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Ian
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If you imagine looking at the engine from the box side, the shafts will be spinning anti-clockwise when the car is going forward.
If you spin the box round so the shafts are now on the front of the engine, they're still spinning clockwise.
Or does that now mean that you can install the engine with the box on the left so you now have the engine behind the shafts?
That does sound like it might work tbh, just depends what happens to the mounting holes you you spin the box around the input spline, and whether the shafts come out far enough away from the block.
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Ian
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quote:
Originally posted by john-d
wonder if someone in the know gearbox wise can tell me if its possible to flip the diff in an f20?
You wouldn't need to with that approach because the engine can be rotated in the bay, inlet would be rearmost in the car, exhaust manifold on the front of the engine adjacent to the rear bulkhead.
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taylorboosh
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Try spinning a pen in your hand and then flipping 180 whilst doing it...
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taylorboosh
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Then the gear box would be on the rear of the engine?
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Ian
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I made some drawings myself 
You need the box on the left as you look at the rear of the car, which either means you run it completely standard and have the engine ahead of the shafts, or you rotate the box so the engine is behind them.
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Ian
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quote:
Originally posted by john-d
Then the gear box would be on the rear of the engine?
No its still on the side just rotated about 1/3rd of a turn about the input shaft.
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taylorboosh
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you have confused me here Ian... Diagrams are going to be needed lol
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taylorboosh
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In my mind if I rotate the box it will run backwards?
It will fit it what you have suggested would work
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taylorboosh
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That 100% would work imo...
All id need is an adaptor plate and exhaust manifold to clear the shafts
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Ian
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Ian
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Labels on the car pic are inlet on the engine and cam belt on the right side.
Box is on the left, shafts ahead of the engine.
Exhaust manifold needs to clear the shafts, shouldn't be too hard because you can bring it out straight at the head by chopping the flange off and lengthening the pipes. Might run worse but its a solution of sorts.
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taylorboosh
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Great diagram... Exactly the conclusion I've came to in my head..
Wouldn't imaging flipping the box to be a huge deal?
this really is an excelent idea Ian, thanks
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taylorboosh
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Any reason it would run worse? Or do you mean because of gearbox rotated
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Ian
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No the exhaust length, the joins are designed to avoid too much back pressure between each chamber. I was meaning power curve of the engine.
Box rotated shouldn't really cause any problems to it running if its secured strongly enough. Oil supply is the only real concern, not sure where that would leave the filler or whether everything would be lubricated properly.
Does give you some major fabrication to do though, you would probably lose all the mount points, front one will have a shaft in the way, gearbox mount won't be there and the rear mount won't have much to bolt to.
Starter motor will be to cock. Linkage will now be underneath. Probably some more things, good luck 
[Edited on 01-02-2012 by Ian]
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taylorboosh
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Maybe an electric oil pump would need fitting to the gearbox..
In regards to the manifold id probably have a look into a properly designed one if that was the case..
Good thing is it wouldn't have to be a c20xe.. Could be a x18xe or any
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taylorboosh
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Linkage will be very confusing lol
Its a shame the casing can't be rotated but the gubbins kept the same way up near enough..
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Ian
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Yeah I'd even consider going for an X16, still be fairly perky.
Manifold wouldn't be a major problem if the air flow is different, it just moves the power curve about. Probably not a major concern while you're getting it running.
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taylorboosh
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Rear mount would need to come from a brace between chassis legs. Gear box one would need fabricating. and front would need some sort of bracket inventing...
Would also probs need custom shafts
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taylorboosh
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I work a x16 at around 160 BHP per tonne..
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Ian
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What's the difference in track? Might be worth using the standard shafts and engineering the hubs location to suit.
Corsa front hubs would be nice, you'd get toe adjustment, could use a standard strut etc.
[Edited on 01-02-2012 by Ian]
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taylorboosh
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I think the track is very similar tbh
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Ian
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That's useful, standard shafts in that case. Would be unequal length on a small block but that shouldn't be a worry so long as everything on the engine is out of the way.
Just make sure the engine ends up similar height relative to the standard hub.
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taylorboosh
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Really going to take a lot of measuring and planning but seems it could be done a lot cheaper than buying a race gearbox and fitting a diff engine/tuning the imp unit..
Think I will put feelers out for a cheap vec or corsa
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taylorboosh
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Thanks for the help Ian. Of to bed now. No doubt I'll pic this up tomorrow
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