Fiat OT 2000 Coupe America

[rraspa]

Hi
I am currently building a replica

I am using a VW gearbox mating to a fiat twincam

I still want to use the fiat 850 mechanical speedometer

The vw box doesn't have any input for the Speedo cable.

Does anyone have any suggestions?

[keithwwalker]

Which type of VW gearbox are you using?  I have a T3 (Vanagon Doka) and the speedo drive is off of the front wheel hub.  Were older VW's similar?

Update: I have checked my old Greg Schmidt parts book on 600/850's and he does not mention any parts available for speedometer conversion.

I am contemplating an OT2000 conversion/tribute myself with a Lancia Beta block, and was wondering if a Porsche Type 901 gearbox would fit without sheetmetal modifications.  I believe that 901 gearboxes have a speedometer drive on them:
http://www.californiamotorsports.net/901.htm
I have read that the 901 gearbox is a bit smaller than the VW box.

There are many shops on the web that advertise recalibration of the speedometer. 
This shop may do it for Veglia instruments http://www.paspeedo.com/

Some Type 915's have an pulse electric speedometer, I have no idea what it would take to adapt something like that...but then I have heard that the gearbox is too big to fit into an 850.

[rraspa]

Hi Keith
i am using a VW type 3/ Super beetle box. As you ,mentioned they did run the speedo from the front wheel.

i have heard that an older style Porsche gearbox can also be used, not sure of the number is 901.

i was lucky enough to find a good VW box and a guy in Australia makes up the adaptors and flywheels to fit between the Fiat block to VW box.

I have found a few company's on the web that take an electronic signal and convert it to a cable drive. I need to find out more a bout the product.

Good luck with your project, keep me updated

[keithwwalker]

I believe the VW and Porsche 901 bolt patterns are identical?  I have heard that the 901 box is not as bulky and performance upgrades are available.

Please post photos and details of the flywheel and shaft adapter when you can!

kww

[Rubino]

Hello friends of the "OT"
I am also doing a replica OT in Australia using a Fiat twincam, after reading this thread and already having a vw type3 gearbox without speedo drive ,need to ask about the "901" gearbox-
1. has a speedo drive suit Fiat 850?
2. has driveshafts bolt-up same as vw box?
3. has bell housing to engine bolt-up as vw box?
4. has ratios that better suit 850 street/track driving?
I need to know if dumping the vw box and buying a 901 will make a better conversion for a better overall car,
any advice? can you help me!

[trevor]

You might like to research the Fiat 124/Porsche/VW transaxle adapter detail on website and as supplied by Miller's Mule Machine and Design   www.millersmule.com 
Trevor

[Rubino]

Thanks Trevor,
That is a nice website ,but I have the bellhousing flywheel and clutch sorted just wanted to know if vw to porsche fit-up was the same (it is the same) and if the #901 speedo drive was usable with a Fiat 850 speedo cable. plus is there any other benifit to dumping the vw box for the #901 type.
cheers!

[rraspa]

i have attached some photos of the car and some parts that i will use.more photos coming soon

[rraspa]

Convert rear hubs from fiat 850 to Fiat 128 as shown in diagram and make a new bracket for the disk brake caliper

[rraspa]

Rear hubs with wheel studs and disc brake conversion

[guy moerenhout]

nice OT  front bridge,where it come from ?

[rraspa]

It comes from New Zealand

website is http://www.fiatparts.co.nz/

[fredabarth]

Hi Renato,

You are going well with your rearsuspension!
Top.
What type of caliper are you using?

Groet,
Fred

[rraspa]

Hi Fred

THESE ARE NISSAN SKYLINE R31 REAR DISC BRAKE CALIPERS,
THEY HAVE A BIGGER PAD AREA THAN THE FIAT 124 SPORT.
I WAS TRYING TO FIND FIAT 125 OR LANCIA BETA CALIPERS THEY ALSO HAVE A BIGGER PAD AREA, BUT NONE WERE AROUND AT THE TIME.

Renato

[rraspa]

Front end done, new crossmember, coli over shocks and vented front brakes off an Alfa 33