Halda Twinmaster & Porsche

[bosman]

Richard,
You are right about the connecting wheel always being 55, but in my Twinmaster the Z-gear is also 55 teeth, making the gearing 129/55.
Cam and I both have 15" rims. His 205/60's have a sidewall height of 123 mm, my 225/55's have a sidewall height of 123.75 mm, so we're very close on wheel circumference; 1969 mm vs 1973 mm. The difference would be .2%, which is only 2 mtrs per kilometer. So I think Cam should try the 129/55 gears. Good luck!
Arjen

[preS]

Arjen,

First. The official Z gears are:

70 - 58 - 48 - 39 - 27 - 22 - 18 - 16

He might have a hard time finding a 55 which is not an original gear for a Trip or Twinmaster.

Second .2% is the eq. of almost 3 teeth (1 tooth is .07). So w/ a 55 he will need a 126.

Regards.

RIchard

p.s. do you already have your new car in?

[bosman]

Hi Richard,
Haha, this is turning into a math game!
I think you're making a mistake. 2% would be 3 teeth, but the difference is 0.2%, which would only be 0.3 teeth. Or am I wrong?
Anyway, I didn't know the 55 is not a standard Z-gear, it was already in my Twinmaster when I got it.
I don't have my new car in yet, it is still waiting (on blocks) in Indiana for the wheels to get back from Al Reed. Than shipping to Holland, so I think I won't make it in time for the Horneland Rally in March.....
best regards,
Arjen

[preS]

Haha, this is turning into a math game!

No time for that

What Cam should do is get the correct T gear, hook it up. Drive 4-5 miles. Tell us what he measured and we can tell him which gears he should get. Than he has the correct gears right away. No trial and error.

Richard

[bosman]

Absolutely right, Richard.
Cam, just let us know what comes out of your test run, than it's simple from there. Good luck,
Arjen

[PStey]

I have 131 and 58 gears in my twinmaster. I run 205/60/15 tyres and its nicely calibrated with this setup.

Parts can be obtained from:
# Casu-Utrecht BV
Ravenswade 118
3439 LD NIEUWEGEIN
Tel.: 030-2884470
internet: www.casuutrecht.nl
e-mail: info@casuutrecht.nl

# Belmog
de heer Hedwig Rodyns
Anton Bergmannlaan 28
2500 LIER - BELGIE
Tel.: 00 32 3 4890636
internet: www.belmog.com
e-mail: belmog@skynet.be

# Info Instruments BV
Hazeldonk 6403
4836 LH HAZELDONK
Tel.: 076-5961140
internet: www.info-instruments.nl
e-mail: info@info-instruments.nl
of
Burg. Schalijlaan 38
2908 LS CAPELLE A.D. IJSSEL
Tel.: 010-4156366

# Martin "King Cog" Jubb
8 York Close
Stoke Gifford
BRISTOL BS34 8NU
ENGLAND, UK
Tel.: 00 44 117 909 9769
internet: www.haldaman.com
e-mail: haldaman@aol.com

# Willi Potjans
Am Haselbush
47665 SONSBECK
DUITSLAND
Tel.: 00 49 28 0150 96
internet: www.halda.de
e-mail: potjans@halda.de

# W. van Munster Technisch Bureau
Coenhavenweg 8
1013 BL AMSTERDAM
Tel.: 020-4192167
# HANDA Shop
H. AND A. den Reijer
(Hennie en Anne-Marie)
Irene Vorrinkstraat 17
4105 JA Culemborg
Tel.: 0345 534 530

[larwik]

You might have this info allready?..

http:// www.rallyracingnews.com/manuals/halda.html

and here is a guy in Mornington,Victoria...selling twinmaster"stuff' on E-bay Item number: 220080014007 .../ Lars...

[preS]

Cam,

When you are thinking about doing some serious rallies, I would like to bring it under your attention to install the Trip/Twinmaster more in the center of the dash. Sometimes a navigator has it's hands full (road books, time table) and lacks that extra hand to zero the Trip/Twin. When it's closer to the driver, he can zero it. Another advantage that it will be easier to read for the driver.

Just my $.02

I've got photos of a nice glove box bracket for the Halda with Heuers I'll try to find for you.

the picture from the Twin w/ Heuer dash clocks was posted by Milou about 9 months ago. He scored it from Edmond Harris at the Essen. Do a search and it should (could) come up

Richard

[CamBiscuit]

Thanks Guys,

You have out-done yourselves. Much appreciated

[hgarazo]

Found it! Pretty slick bracket (NOS, as Richard pointed out), could be modified to suit your tastes...