taylorboosh
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Registered: 3rd Apr 07
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Right i have been messing on stripping the engine ect today and really have learned an awful lot. Getting stuck in is a great way to see how things work 
Now my question... it actually seems it would be viable to mate the imp transaxle to the x16xe with some bell housing mods (my mate is adament he can weld the casing) and i feel a dog box would be awesome so transaxle strength would no longer be an issue..
the only issue is the input shaft on the transaxle wont fit the corsa clutch...
so i have devised the methods it could possibley work... id like to know your thoughts or if you have any other ideas?
method 1:
have the holes in the imp fly wheel welded and re-drilled to bolt onto the x16xe, this way i could use the whole imp clutch set up and only an adaptor plate would need making. the drawbacks are the imp clutch design is 40+ years old and 100+ bhp would shaft its arse big time, i dont think welding flywheels is safe, i would have to cut a bit block away to make the starter motor work
(this is my least fave plan)
method 2:
Use the whole corsa fly and clutch assembley and make a hybrid bell housing from the imp transaxle and the corsa box.. this would be strong enough to take the power and would not require fannying on with starter motor. drawback is id have to either have a custom input shaft make or find some one to change the splined ring in a corsa clutch? (anyone know who can do this?)
method 3:
as above but find a clutch with the same spline pattern as the imps shaft but that will fit in the corsa housing and work (my ideal option)
some quick pics
fly-less x16xe
fly-less 875
corsa box
imp transaxle
corsa fly and clutch assembley
imp fly and clutch assembley
x16xe and transaxle together
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Dan295
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Registered: 9th Oct 06
Location: London
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custom flywheel, the correct pattern for the clutch which fits the crank on the imp engine. that way you can bolt it to the corsa gearbox easily. iirc andy1234?? did it with his vxr build to mate the vxr lump to an F28?
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
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You got enough room to mount the engine reverse longitudinally?
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taylorboosh
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Registered: 3rd Apr 07
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yes plenty space that way on.. this will deffo be the best option imo
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
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Solves your linkage problem then as well. At least if you're using the standard box you have no shaft/hub/linkage headaches.
I would be concerned at the cost to convert though, particularly if it's going to break with that amount of power.
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taylorboosh
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Registered: 3rd Apr 07
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the main issue is the clutch. once thats done it would be fine providing its a dog box.. some on imp club running 160 bhp turbos
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
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I did some thing similar, but it was a perkins diesel engine on to a marine drive unit,
I did it by buying a piece of 15mm thick alloy, machined down the bell housing on the drive unit 15mm,
Then cut the plate so it bolted to the perkins engine and cleared the starter and fly wheel,
I lined the two up on a spigot,
Tacked it with ally wire in my mig welder then tigged it up at work.
I modded the clutch/drive plate to fit,
Obviously you could use a helix pressure plate, tell them what spline you want and they will fit it
Hope makes sense posting on my phone.
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LeeM
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Registered: 26th Sep 05
Location: Liverpool
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is it not possible to get a custom friction plate made up from a motorsport company? use the vauxhall flywheel and pressure plate
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taylorboosh
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Registered: 3rd Apr 07
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lee that would be the ideal plan
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
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obviously you need to check how far the input shaft intrudes, etc,
May need to put a bearing in the fly wheel centre
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JamesMG
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Registered: 14th Nov 06
Location: Newcastle-under-Lyme, Staffordshire
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What size is the imp clutch friction plate / flywheel compared to the xe? If its similar (or slightly smaller) then you will probably be able to find a competition clutch friction plate that will be able to handle the power of the xe and fit inside the pressure plate / flywheel assembly of the Xe.. Depends on the measurements of both really...
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taylorboosh
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Registered: 3rd Apr 07
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but once you budget the £2k for a dog box things quickly mount up.. if i can get an of the shelf jobby to fit then i will
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
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quote:
Originally posted by LeeM
is it not possible to get a custom friction plate made up from a motorsport company? use the vauxhall flywheel and pressure plate
Helix will do this, no extra cost last time I checked. As said in my post.
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taylorboosh
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Registered: 3rd Apr 07
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imp one is smaller but only by about 30 mm
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Tomnova16
Premium Member
Registered: 21st Jan 06
Location: Gerrards Cross Drives: Porsche 911
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I would also go for custom friction plate.
http://www.lemass.co.uk/ for all your automotive/bodyshop needs
Located in Chalfont st Peter
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scottyp1989
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Registered: 29th Jul 07
Location: Warley, West Midlands
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30mm overall? So 15mm all round, shouldn't be that much of a problem
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taylorboosh
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Registered: 3rd Apr 07
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yea scotty, reading through google searches it seems most get a custom jobby made up, not sure on the costs of this mind
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taylorboosh
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Registered: 3rd Apr 07
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ive been given a link for quinton hazzell clutch catalougue.. all i need to do is measure the x16xe clutch diameter and find out the input shaft from the transaxle width and spline count and then look through to see if i can find a match...
what im concerned about is the fact nobody ever mentions the width of the clutch? surely this is a defining characteristic?
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JamesMG
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Registered: 14th Nov 06
Location: Newcastle-under-Lyme, Staffordshire
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Well the flex in the pressure plate makes up a lot for thickness as it will vary with wear anyway.. But would prob be a good idea to try and locate one roughly the same though I'd say!
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taylorboosh
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Registered: 3rd Apr 07
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yea, one with the anti judder spring things too imo
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craig-dodd
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Registered: 6th May 09
Location: Flintshire
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you can find the shaft spline info on the helix clutch website
click
i think a x16xe fricton plate is 200mm (nott 100% sure tho) and if you look on this next link they have a friction plate with same spline at the imp and 200mm diameter
click
[Edited on 07-02-2012 by craig-dodd]
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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I would just do the thick alloy plan and make a bellhousing adapter and get a custom shaft, as if you get a custom friction plate it may need to get replaced due to warpage/wear etc but the shaft would only be bought once.
Obviously the imp clutch/flywheel is a big no no as they can't even handle the origional 45bhp.
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taylorboosh
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Registered: 3rd Apr 07
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Tbh I think the best idea is to find a friction plate similar size to a corsa one but with the same splines as the imp
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taylorboosh
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Registered: 3rd Apr 07
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, I do it all the time for competition boxes. 2 areas of the casing are filled in with weld and five plates are welded around the output shaft areas. A new longer stud is fitted with 3/8" helicoils to support the n/s diff bearing. This must be done with the Rootes special tool RG365 clamped into the casing otherwise distortion compromises the fit of the diff. sleeves.
This will only protect the weakest part of the casing and the problem then moves to the pinion head bearing mount, which is the next weakest part. The alloy shoulder supporting the bearing cup and shims can break away with terminal, and expensive, consequences. This happens during sudden overrun changedowns eg. slamming the box rapidly down from fourth to second at high revs or mis-selecting on changedown causing a mechanical overrev which can also damage the engine. Because you are using the drivetrain to slow the car down, the crownwheel tries to force the pinion shaft towards the front of the gearbox and the shock loading can break the casing bearing support shoulder.
The pinion tail bearing shoulder suffers under hard acceleration as the forces acting on the pinion shaft are reversed - start line clutch drops at high revs are the worst. This is much less susceptible to failure than the pinion head bearing mount though. Something will be mass produced soon to overcome this problem on all except 5 speed boxes (not enough room for the mod).
Above is a post from a rally god on the imp forum... Seems the gearbox will need more than just straight cut gears
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