Sequential Gearbox

[PSk]

Quote:

Originally Posted by alfazagato Pete, Its lovely to see your famous Australian fair mindedness becoming bogged down on this subject. Fair doos if the car is a real GTA.... don't touch it...but if it is a clunker bought for "pocket-money" why not? I don't for one minute think that the intention is to build a stealth GTA or even a stealth step nose....so why can't Wolfgang spend a bit of money and have some fun on the roads. I do think we have to lighten up on this matter.

[genericwood]

Quote:

Originally Posted by PSk Agree, as long as it never ever enters a historic race meet.

[PSk]

Quote:

Originally Posted by genericwood Pete, it sounds to me like your problem should be with historic racing organizations that have lax rules (or don't enforce them), not with the competitors who simply take advantage of opportunities to be more competitive.

[Andrew_TRC Mag]

Is this thread supposed to be about a 'sequential box'???

Woolfgang has an interesting mod using a proper race box . . . . maybe stick to the topic??

[italcarguy]

Quote:

Originally Posted by alfatreter hello guys, first of all, i know that there will be at least to groups. some persons who do not accept such things in vintage cars and the others who maybe find it "cool" etc. my car is not a "period correct" race car like a gta etc. it´s only a 1300 equipped with many fast and many modern parts like twin spark engine, modern seats, brake, suspension, carbon body parts, injection etc. etc. and maybe soon with a sequential gearbox. and why?? because its a horny feeling to drive such a fast old car on street or racetrack, hear the sound, feel the speed. and its very nice to battle with gt3, m3´s, corvettes, nissans and, and, ... on open trackdays. otherwise there are a few race series in germany or austria, where such modified cars are allowed. ( scuderia alfa corse, histo-cup etc.) there you battle with other modified alfas or with modified bmw 2002 with the old 2,5l m3 engine, opel kadetts, ford escorts, porsche 911/924 and so on next season i will inscribe me in this two series. now som technical details: this is a "dog ring box" (this means no synchro rings) the construction is lika a motorcycle gearbox. the maximum torque is 300-350 newton/meter. the input shaft is built with the same diameter like the alfa shaft, so i don´t have to change the clutch, when changing gearbox. only an other driveshaft and i can switch from normal to sequential gearbox, if it is needed. the gear transmission ratio is with a bit longer first gear than standard, and a 0,85 6. gear almost like standard, so the gears 2, 3, 4, 5 are rather short. the blue cable is for the reverse gear, which you shift with the second lever on the gear stick. the bellhousing is a standard alfa part which is black eloxated. it is fixed on a milled adapter plate. wolfgang

[charlino.1]

Quote:

Originally Posted by Alex Lightest 105 clutch/flywheel ever? Look like a specially machined item with integral ring gear to accept a tiny clutch pack. Pretty cool, but I imagine a biatch to drive in regular traffic.

[ciscotex]

That don't look like any Alfalfa Romeo gearbox I've ever seen!

Paul

[genericwood]

Quote:

Originally Posted by ciscotex That don't look like any Alfalfa Romeo gearbox I've ever seen! Paul

[ciscotex]

Thanks, Eric. I missed the comment about the video. I figured the video box was a Colotti or similar, but I'm real curious about Wolfgang's box in the pics. Anyone recognize it? Hewland, Xtrac, or...?

Paul

[AndrewO]

Hello Carlo,

Welcome to the Alfa BB.

I noticed somewhere that the box you've developed is patented. If it is suitable for FIA then I am sure someone will want to buy it. Are you going to sell them and for how much money?

Congratulations on your work.

Andrew

[charlino.1]

Dear Andrew,
I attach the brochure that we have prepared for the GearBox (sorry for my english, may be there are some terms that are not correct):

ALFA ROMEO GIULIA SERIES 105
FRONT COUPLING GEAR BOX,
LA OFFICINA PATENT

We are proud to present you the new gear box developed and patented by Laofficinas' Technicians
This new evolution consists in a front connecting coupling gears, able to guarantee high racing performances, and, at the same time, an easy driving comfort as a traditional gear box.
The gear box project uses different sliding gears and sliding sleeves that can be installed on any traditional Alfa Romeo 105 series gearbox , as well as on racing gearbox with tight gear ratio

The main difference of this gear system (both for racing as for traditional street gearbox) consists in the fact that you can use it as a sequential gear box where you can change the gears without using the clutch in acceleration or downshifting and even without lifting the foot from the gas pedal. This permits a drastic reduction of time shifting and save precious time during one racing lap.

The Gear Box is available in two different options

1) Racing Gear Box complete with Front Coupling and Close gear ratios (picture n 1)

Complete set with total replacing of the following parts (cost ex Works - 6.000€):
1st gear (2,33)
2nd gear (1,57)
3rd gear (1,20)
Drive-shaft 4th gear (1,00)
5th gear (0,88)
Double gear 3rd-4th gear
Double gear 5th-reverse gear
Sliding sleeves ( 3 pieces)
Sliding copuplings ( 3 pieces)
Bushing cage 1st gear
Bushing cage 5th gear
Coupling flange on 5th gear (5 pieces)
Main Shaft
Rolling cages set

We will check the conditions of your parts that are supposed not to be changed. In case of worn-out parts, we will replace them with original standard spare parts.
The kit has a close gear ratio of gears :1st(2,33), 2nd (1,57) , 3rd ( 1,20) , 4th ( 1,00) and 5th ( 0,88) , that we have specially developed for racing competition (see the speed/rpm chart).

On demand we can also supply :
Racing differential with variable set up in acceleration and braking
Light double disk (140 mm.) clutch kit with racing light fly-wheel (total set is 5,5 kg – see the pics)

This Gear system can be used for a normal street use as well as racing track experience.
You won't feel any big difference with the original gear box.
In case of overhaul due to syncro worn out you can change only the single parts as sliding gears or sleeves rings or front coupling gear set, halved the price of the gear overhaul.
You go on using the gears, so you reduce the costs and the handwork.

The special alloy and hardness of the materials used in this kit permit a double working life and efficiency of the gears, so the overhaul will be done much later than the use of original synchro mechanism even in racing gears box.


2) Front sliding Coupling assembly suitable for standard or racing gear boxes already assembled (picture n 2)

This second option supply only the front sliding coupling, the sliding sleeves and the sliding gears that are mounted in a standard or racing Alfa Romeo gear box (cost ex Works - 3.000€).

The original gears of your gear box or the racing ratios remain, we only substitute the following parts with our special ones:
Set of 5 pieces : flanges inserted on the gear
Set of 3 pieces : sliding couplings
Set of 3 pieces : sliding sleeves
In case of overhaul the new components replace the original synchro hubs and rings, maintaining the same gears usually used.
This kit can be used by all those that desire to have the same advantages of a semi sequential gear box, and want to exploit the performances of the new system, expressly planned by our technicians.

For both options ( 1 or 2) our experts can fix personally the gears components on your own gear box.

To see the demonstration or proof of how it works, visit YouTube - Broadcast Yourself. typing “laofficina gear box” or

YouTube - Laofficina.it - Alfa Romeo GTA Sequential GearBox

If you are interested please do not hesitate to contact us

Attached Pics:
Complete Racing Gear Box (Picture n 1)

Kit Front sliding Coupling (Picture n 2)

Special Light Racing Flywheel (5,5 Kg. Including klutch kit)
in the picture is shown the GTAJ 1300 flywheel – available also for 1600, 1750 and 2000 cc.


Gear Box Speed Chart (59cm. Tyre diam) with 8/41 and 9/41

[lurani]

even though I prefer changing gears by clutch, it really sounds interesting.... welcome to the forum!

Kinds regrads from germany!

Giovanni L

[Sprintn]

Jeezzz!!! I think all this gentleman is trying to do is to have fun with his car and make technical mods to a car that... Relative to "Modern" cars filled with Electronic Computer Wizardry... is affordable to do so... such as "Max's GTA replica for the 21st century". I have to agree... it is fun to have a great looking old car that is fairly simple and have it up on jacks and be able to play with it and do some of the things to it that you read about in the racing technical magazines... things that in modern sports cars only wealthy teams or people can afford to modify. Most Modern cars... the only thing you can really do is drive them, wash them, and look at while parked in the drive or garage! Even if you have the money to modify them, they are usually way to complex to work on yourself... which to some is part of the passion!
He is probably sorry he asked by now... which is really too bad because this BB is meant for people to be able to present such ideas.?.?

[dancia]

Our beautiful, classic, historic cars should only be run in configurations that were originaly homologated. Any other spec and then you might as well build a modern sports raceer with a GT shell. Enjoy the history.

[GTV-GR]

i disagree with dancia , development on these cars should be continuous as Max does, the historically correct parts aren't thrown away one can switch them back if it's needed. I really enjoy logging into the alfaholics site and seeing some new weird findings from time to time.