sequential gearbox ??? where do you get them..
Turbo Mini Forums

Hmm i wonder how it nocks up and down the gears?? How long before robert converts a stabdard box lol

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Ha, group buy on sequential mechanisms anyone?!

Just think of the difference this would make to strip times!

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

It looks like a drum arrangment, you can see how it works here. Not that complicated really.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

interesting. well if i go ahead and get it ill still need a lsd and cwp because it doesnt come with that.. it is alot of money so i will sleep on it..

NEW ZEALAND MIGLIA SPEC ROAD LEGAL TURBO MINI BUILD THREAD >>>

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=363477

Well the priciple of it, making it work and building it is another story, milling the grooves into the drum would be the hard part so that the gears were in and out at the right times

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

The compicated bit is working out the rachet and pawl system, converting a linear motion into rotation of the ratchet.

If it was that simple, it wouldn't cost 4K and there would be more than just the one in a display cabinet

Well there is that lol. Thing is where else can you buy one? They can charge what they want effectively.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Is it just me that thinks that the Minispeed box looks a bit too delicate for high boost?

Narrower gears at what appears to be a finer pitch must have a lower torque rating.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Lol stuck on that one arent ya paul hehe.

Check this out Sprock, perhaps the bmw k engine is even more useful than we could ever imagine

Edited by MikeRace on 26th May, 2010.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

You should have something similar on any bike.

Jean

http://www.jbperf.com/

Hmm this could be a nice winter project. :)

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

www.fusionfabs.co.uk



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

If you had ever riden a BMW K you wouldnt want to use the gearbox
Allan

http://www.rabdunn.co.uk/

I spoke to Minispeed about 6 years ago when they first come out, I was going to buy one until they told me it saved 3/10s of a second per gearchange. I decided straight away thats bollocks Im not having one

I seriously doubt it!

So its only worth ~1 second in the right hands?

Nitrous injection would give better results for much less

Edited by Sprocket on 26th May, 2010.

I would bet that the gear changes in the TT are not much more than0.3 of a second so if it saves 3/10th then the change time would be zero.

I guess it only really improves 2nd to 3rd, but again with a quick shift and a sprung gate we manage very fast changes. Obviously most people have come to the same conclusion already.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

you can fit a 6 speed cbr1000rr gears in a mini 6 speed.

and also the cbr900

just need to use a roller bearing instead of a ball bearing.

one very smart bloke in australia told me about it.

but the bike gears are straight cut and to loud for me or i would have done it.

his some emails below.*********

the gear set I am using is out of a honda cbr 1000 rr bike around 2006 model. The 1st gear is 2.57:1 and 6th gear is 1.1:1 so it is not a over drive.

The bike gears are straight cut and in constant mesh. The only bearings in the main and input shaft are 4 needle rollers[about $10 each for replacement]. The indivdual gears are about twice the size as a mini gear and the shafts are 35mm dia.
the std bike uses plain ball bearings to support the shafts, but as the mini crown wheel and drop gears are helical I am going to run taper rolloers for adjustment of preload and greater load carrying very easy fit.

The cbr one I am doing the mainshaft fits straight into the mini box and although the gears are straight cut I am using taper roller bearings that are bigger than the std bike ball races gears are much stronger then a mini.
There is also a gearset out of a honda vfr1000 but I have not checked the ratios yet. If the 6th gear is more than 1:1 then I will get a set from US and compare to the cbr.

The box I am doing is for a very fast road car and thats why the 6th gear ratio is lower so it will pull in top gear.

I have looked at a 6 speed box out of a honda VFR 900 bike and the 1st gear is 2.8:1 and 6th is .89:1 so it has a more of a overdrive in top gear. I have not actually looked at one but from the info I have they are built similar to the cbr and are about the same size so they may be more suitalbe for a road car.

hope that helps guys David's idea and he is a fooking gun with this stuff!

respect to the man.

Edited by NickG on 16th Jul, 2010.

please check this link out guys.

http://www.ausmini.com/forums/viewtopic.php?t=64372

David is the man.. we are all working on it though :)

If you check out Ikeya shifter. They make shifter mechanisms for some Jap cars, that use the same principal.

Seems Ikeya put the drum/ratchet type arrangement externally, whereas Minispeed have mounted it internally.

Obviosuly Ikeya intend the sequential shifter to be used on std gearboxes, or dog boxes to turn them into sequential. Apparently quite tricky to get right though, as engine/box movement in relation to the shifter can cause problems.

SQS Racing in Czech also make a sequential shift mechanism for some cars....very nice too. They all carry a hefty price tag though

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

That's interesting Stevie, I'll take a look at that.

Something that just sprung to mind is that the old austin 1800 had 3 cables that fed straight from the selector forks to the gear shift, that arangement could be altered to work sequentially,

also the selector forks could be operated from solenoids driven from a a micro controller and buttons, not that hard programing wise...

http://www.jbperf.com/

[X] nail here for new monitor

what about the kad 5 speed dog box? uses a dog leg first gear, might be a bit better?

SQS

http://www.sqsracing.com/kategorie-produkt...t-shifter-ikeya

Given teh relative simplicity of a rod change box....I guess it shouldnt be hard for them to make something..

Could maybe even operate a cable system to wizardry closer to the box which would eliminate the rods and make for easy mounting.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will