Author Topic: Fiat OT 2000 Coupe America  (Read 14443 times)

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Offline rraspa

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Fiat OT 2000 Coupe America
« on: May 21, 2011, 09:43:16 AM »
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?

Offline keithwwalker

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Re: Fiat OT 2000 Coupe America
« Reply #1 on: August 07, 2011, 12:38:41 PM »
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 [nofollow]
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/ [nofollow]

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.
« Last Edit: August 09, 2011, 10:34:55 AM by keithwwalker »

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #2 on: August 11, 2011, 06:46:18 AM »
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

Offline keithwwalker

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Re: Fiat OT 2000 Coupe America
« Reply #3 on: August 12, 2011, 11:06:12 AM »
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
« Last Edit: August 12, 2011, 11:06:58 AM by keithwwalker »

Offline Rubino

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Re: Fiat OT 2000 Coupe America
« Reply #4 on: December 18, 2012, 02:34:18 AM »
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!
SPEED - “The Magnificent Beauty of Mechanised Velocity”

Offline trevor

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Re: Fiat OT 2000 Coupe America
« Reply #5 on: December 18, 2012, 09:31:50 AM »
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

Offline Rubino

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Re: Fiat OT 2000 Coupe America
« Reply #6 on: December 18, 2012, 10:54:20 AM »
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!
SPEED - “The Magnificent Beauty of Mechanised Velocity”

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #7 on: January 23, 2014, 11:16:48 AM »
i have attached some photos of the car and some parts that i will use.more photos coming soon

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #8 on: January 23, 2014, 11:31:17 AM »
Convert rear hubs from fiat 850 to Fiat 128 as shown in diagram and make a new bracket for the disk brake caliper

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #9 on: January 28, 2014, 12:31:54 PM »
Rear hubs with wheel studs and disc brake conversion

Offline guy moerenhout

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Re: Fiat OT 2000 Coupe America
« Reply #10 on: January 28, 2014, 05:55:31 PM »
nice OT  front bridge,where it come from ?
______abarth  gmr-team ______
___http://www.abarth-gmr.be ___

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #11 on: January 29, 2014, 11:20:06 AM »
It comes from New Zealand

website is http://www.fiatparts.co.nz/ [nofollow]

Offline fredabarth

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Re: Fiat OT 2000 Coupe America
« Reply #12 on: January 30, 2014, 10:56:47 AM »
Hi Renato,

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

Groet,
Fred

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #13 on: February 01, 2014, 09:15:34 AM »
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

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #14 on: February 09, 2014, 07:12:46 AM »
Front end done, new crossmember, coli over shocks and vented front brakes off an Alfa 33

Offline fredabarth

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Re: Fiat OT 2000 Coupe America
« Reply #15 on: February 14, 2014, 03:26:11 PM »
Hi Ras,

That is also a way to do the frontbrakes. Nice ventilated discs.
What will be the next step with your car?
Keep on going!

Groet,
Fred

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #16 on: March 02, 2014, 02:37:05 AM »
Dummy Regatta 100s (1600) engine and VW gearbox

Offline abarthje

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Re: Fiat OT 2000 Coupe America
« Reply #17 on: March 09, 2014, 11:38:41 AM »
This is a film of a German build OT 2000 replica.

http://www.youtube.com/watch?v=Gs6g8Zp0Zcg [nofollow]

Greetz Patrick

Offline fredabarth

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Re: Fiat OT 2000 Coupe America
« Reply #18 on: April 11, 2014, 12:54:33 PM »
Hello Ras,

Your topic is working again!!!!!

Regards,
Fred

Offline rraspa

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Re: Fiat OT 2000 Coupe America
« Reply #19 on: April 11, 2014, 01:08:33 PM »
Hi Fred

Thanks for the good news.
I was just about to start a new topic. i'll try to add some more pics over the weekend,

Ras

Offline slim4936

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Re: Fiat OT 2000 Coupe America
« Reply #20 on: April 15, 2014, 07:40:36 AM »
Hi Ras, Great looking build. I, along with everyone else on this forum, am very jealous!

Regarding your front cross member setup:

Might be worthwhile double checking the shock absorber is long enough and/or is pinned in the correct/best location. A lot of these kits are sold with a "bolt in" promise but sometimes at the expense of the suspension set up itself. In order to fit this criteria, a very small short stroke shock is often used. In your pics I noticed the car up on a joist and the A-arms at full droop. How much shock travel will be left when the car is fully loaded (you,fuel,spare tyre etc) on the ground?

I did a similar conversion with my 600 and ended up using a much longer shock/spring and cut through the wheel arch into the front hood area (as TCR Abarth).Mine would regularly bottom-out the shock with normal/street use. With Abarth type of set up you could also put a strut brace between the towers to add strength. I guess with a twin cam in the tail she'll be a bit of a handful!
This would ofcourse mean more work but believe me, you only what to do this job once.

Sorry if this seems negative on your build but no disrespect is intended. Forums are a great way of sharing knowledge and experiences. Maybe you've already checked all this stuff anyways :)

The 850 coupe is my favourite Fiat shape and a big motor would be my dream car. Good luck with your build and thanks for sharing.

Cheers,
Toby