K1100 16V Turbo build...now transmission build.
Turbo Mini Forums

yes please. Also, what gearset did you go for? I dont really understand, there is the CBR1000RR and then there is the CBR1100XX. Which one did you go for?

I'll be taking plenty of pic Robert, especially comparative ones of the two gearset.

I went for a VFR set in the end, supposed to be a higher ratio. There may be an option to vary the overall ratio by some additional idler gears that need to be fitted to reverse the direction of rotation of the main input shaft. Until I know the spacing between the two shaft centres it'll be difficult to know what size gears could be used.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

If I can help at all with this Matty let me know, I'd love to get a sequential box in my mini.

Team www.sheepspeed.com Racing

Sounds interesting, sequential box combined with flatshift would be awesome.

sounds very interesting matty

is there space for a reverse gear?

good luck with the project mate

My build thread..

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=542985

Cheers jim, I may need dome bits CNC'd.

JT - Yeah it will have reverse, still figuring that out though! lol

I should be able to use the mini 1st motion shaft with the bike set. Just need to figure out where in the box the mainshaft needs to fit, then I can machine the gear off 1st motion.

The VFR main bearing is larger than the mini one, so I should get away with opening up the hole in the centre web and a leave recess to seat the beaing.

Righty some pics....



Mainshaft comparison....



Mini layshaft and bike input shaft...

Edited by matty on 21st Sep, 2011.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

Have you had any thoughts on what you will use for the transfer gears?

Im not sure yet. All depends on the spacing between the two shafts.

Hopefully I can get away with using some SC mini drops, modified to fit or maybe another bike set of gears.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

Ive taken some measurements

1st motion shaft bore 25.4mm
VFR mainshaft end 22mm

Mini main bearing 64.9mm
VFR main bearing 68mm

1.5mm should be enough metal for the bearing retaining clip to seat against. Hopefully I can find a needle roller 22mm inner dia and 25.4mm (1") outer. If I can't I reckon I can use the VFR needle roller and machine the bore of the mini 1st motion to 26mm.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

will that bore be case hardened matt ? if so maybe better to take it out bigger and press a sleeve in ,otherwise as you machine through the hardening you get a tapered hole ,if you go through the hardening then a bit more your in the softer metal. and its a parallel hole .

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

If was thinking the same. All depepnds on how thick the case hardening is. Another option is to use the standard VFR outer bearing race pressed into the 1st motion shaft.

You can see the outer bearing case on the far left hand side of the mainshaft in the second pic. It may be a little too big to fit inside the 1st motion shaft though.

Looks like the minispares input gears will be the best option for the transfer gears, as they come in different ratio's so hopefully I can get 2 that are the right dia.

Edited by matty on 22nd Sep, 2011.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

interesting I'm looking forward to see more of this build.

There ain't no milling machine like the one at home !!!

can wait to see more mate... keep up the good work and good luck

Good luck, im sure you'l sort this!!

Generally when I put my mind to something I get it done...fingers crossed it all work out with this project! :)

Im know what need to be done to the mainshaft now. I should be able to use both standard mini bearings for this after a bit of machine the the mainshaft. Will hopefully get this sorted next week. :)

From having a search thesse seem to be the standard SC ratios:

1st : 2.54 or 2.58
2nd : 1.71 or 1.73
3rd : 1.25 or 1.22
4th : 1.00

My gearset:

1st : 2.847
2nd : 2.066
3rd : 1.578
4th : 1.291
5th : 1.111
6th : 0.965

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

thats a good set of ratio's IMO,

What do you think about 1st gear? It might be a little on the short side.

Ideally I want a gear in between the clubman set and standard ratio.

I was thinking of possibly changing to a 2.9 diff or maybe changing the drop/transfer gear ratio from 1:1 to give a higher overall ratio...

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

I reckon a tall diff with this would be ideally suited.

If something is worth doing, it's worth doing half of.

Will be peeking an eye on this thread..
Good luck Matty!

Dazed and Confused....

Can a 2.9 be fitted to a Quaife?

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

Yes! I have one fitted to mine.

If something is worth doing, it's worth doing half of.

it depends what you use it for road or drag,

on the road I think that first is going to be nice with a 3.1 or 2.9, as the usual 2.5ish SC ratio can be a bit tall if your in traffic, it could be a bit short for drag though, but I doubt it, if it is though, you have two options, go higher... or drop down to around 4:1 and launch in 2nd, I think going higher ois preferable though.

On 23rd Sep, 2011 matty said:
What do you think about 1st gear? It might be a little on the short side.

Ideally I want a gear in between the clubman set and standard ratio.

I was thinking of possibly changing to a 2.9 diff or maybe changing the drop/transfer gear ratio from 1:1 to give a higher overall ratio...

On 23rd Sep, 2011 matty said:
What do you think about 1st gear? It might be a little on the short side.

Ideally I want a gear in between the clubman set and standard ratio.

...

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

No idea mate, I'll try and find out.

Here are the two mainshaft together.



My plan is to machine the left hand side of the VFR mainshaft to be the same as the mini one, and open up the 1st motion shaft to accomodate to VFR mainshaft end. My only concern with this is that the inner core dia of the pinion spline would be 21.5mm (ish) and the mainshaft is hollow with a bore of 14mm. What are peoples thoughts on strength? I might go down the route of getting a completely new mainshaft made up.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

A+ series 1st ratio is either around 3.6, S's and MPI's are about 3.2