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

Well the gearbox cutting has started, and ive machined up a mock mainshsft for dimensioning. Hoping to get a machinig cost next week for the mainshaft.

Ive also found this nice peice of kit...A bit beyond my budget though!

http://www.translogicuk.com/powershifter-gearshift-ps1.htm

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

Thats a steal compared to the Geartronics stuff! Really interested in this build, hope it goes well.

Matt W

Can that only be used on a sequential box Matt?

It looks to be just a 2 way electric linear actuator, so it could be used for anything with a sequential shift pattern I suppose.

The main advantage with it, is that it can adjust the shift speed according to the speed you press the button. So a quick press will be easy to acheive neutral...which is a bit of a ball ache to work out at the moment, as its kind of a half shift with my box.

Are you thinking for your pickup?

Edited by matty on 30th Sep, 2011.

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

Edited by carl talbot on 30th Sep, 2011.

Cheers for the info, I'll see what my local company quote me. They do alot of work for Prodrive etc..and looking at some of the work they are shit hot!

The first of many mods to the casing to enable the first gear to fit.



Next parts to remove are the reverse gear webbing and pick up mount. Still trying to work out best plan of attack for the webbing.

Edited by matty on 30th Sep, 2011.

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

Exciting stuff

Mods to the 1st motion shaft...Took a while to machine that down!





The mock up mainshaft. I'll get some pics up later of the mainshaft positioning in the box.

Edited by matty on 2nd Oct, 2011.

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

Very much looking forward to how this turns out,

just hope it can be made to fit a remote box...

Whats the difference with the remote box internally then?

Ive started to attempt to machine down the bike shaft now, as the mock shaft didn't give me a definitive conclusion to whether everythnig fits ok.

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

on the remote box all the change stuff is all in the spare boit at the end, rather than under the diff,

shamles stolen photo...

In that case I can't see why not. Reverse gear will be a bit of a squeeze mind.

Well it looks like both standard bearings can be used and the standard roller bearing inside the 1st motion shaft.

Pics of machined down VFR mainshaft...Ive mastered sharpening lathe tools now!

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

Top work, your gonna have one very special power unit by the time your done.

looking really impressive!

Team www.sheepspeed.com Racing

If this works which im sure it will, youll have a new job of making gearboxes for people!

As for the boring the mainshaft most of the strength is in the outside, so youll probably be ok. Itd be a lot of money to get a new one made up.

Modifying the gear case a known wear spot is in the webbing above the big double row bearing.

I know KAD get round this by adding an extra bearing which is mounted through the side of the gearbox at the speedo drive end.

your definitely a bloke whose pushing the boundaries and i think its great!

Edited by mw3 on 2nd Oct, 2011.

Matt W

Thanks for your comments.

I was on the same line of thinking with the hollow mainshaft, but it looks like making a new one will be not too much more money, and it allow me to extend the shaft a bit, which means I can make my life easier with the way reverse gear fits. :)

As the gearset is shorter than the mini one, a 10mm plate is needed to be attached to the cenre web for the bearing to run on. Im hoping this will also add a fair amount of strength to the web aswell.

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

looking good, im gad my info helped. im looking forward to how it drives matty.

Yeah cheers Nick. I spoke to David from ausmini (who was doing the conversion) and by the sound of things its no where near completion, so im not going to have any luck with finding out info of what to do.

Am I right in thinking that no one has ran one of these boxes before, that we know of?

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

so what is the plan matty, you looking to get a new mainshaft made up, or machine teeth in the input gear, and vxr mainshaft to join the two together?

Team www.sheepspeed.com Racing

Im getting a new mainshaft made up, 10mm longer with no hole in the centre. This should accomodate a reverse gear syncro next to the pinion gear.

The drive to the box actually goes in through the smaller input shaft (basically where the mini layshaft is).

The mini 1st motion shaft is just being used as mainshaft bearing support/idler to transfer the power for the idler drop gear to the new input gear. If that makes snese?

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

ahh I got you buddy, would it be worth maching a large flat area on the old centre web an putting some CNC's massive stiffner plate in to stop the web breaking?

Team www.sheepspeed.com Racing

Thats the plan, Im just trying to work out how to get a cutting into the far side of the centre web (speedo side). The only way I can see of doing it, is to use a lager end mill horizontal, and attached it to the mill head in situ in the box.The only other way is to go through the diff housing end or from the top, but then the cutter would be 200-300mm long and cutting on the side.

Have you still got acces to CNC Jim?

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

Yes buddy, I'll help where I can with CNC work

Team www.sheepspeed.com Racing

to be honest matt , i think i would cut out the centre web ,and the end web ,and make two 10mm plates to hold it all ,and have them welded in ?

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

as robert says, as this seems to be a bit in the way,