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Zach Gomulka
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« on: January 10, 2009, 17:31:38 pm » |
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How do I get a 6 cylinder Porsche VDO tach to work correctly on a 4 cylinder? Can it even be done? Thanks!
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Born in the '80s, stuck in the '70s.
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Airspeed
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« Reply #1 on: January 10, 2009, 17:41:52 pm » |
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Yes, it can be done. Mine was originally from a 6-cyl. too and a specialised company (some 20 years ago...) rebuild it to 4-cyl application. Today Peter Fett in gemany can do 'anything' with a vw and a porsche gauge: www.fett-electronic.de/ |
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"...these cars were preferred by the racers because the strut front suspension results in far superior handling than the regular torsion bar front end..." - Keith Seume.
10.58 @ 130 mph (2/9/2022 Santa Pod)
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Rocket Ron
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« Reply #2 on: January 10, 2009, 18:27:37 pm » |
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the Peter Fett site looks interesting
I like the look of the 100mm twin sender unit ie the tacho with the built in temp gauge
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13.12 @ 101.84
Grooving out on life
You can't polish a turd but you can roll it in glitter
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Bruce
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« Reply #3 on: January 10, 2009, 18:35:03 pm » |
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Why not just get a 914 tach?  |
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Zach Gomulka
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« Reply #4 on: January 10, 2009, 18:55:56 pm » |
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Why not just get a 914 tach?
Because the redline is too low and it only maxes out at 7 grand. |
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Born in the '80s, stuck in the '70s.
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Diederick/DVK
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« Reply #5 on: January 11, 2009, 11:21:44 am » |
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zach, i've got one too. it can be done for sure. i started a topic one month ago and i was given an address in socal. you'll find it using the search function  |
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Diederick
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Proud member of:
DVK ~ Der Vollgas Kreuzers
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bang
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« Reply #6 on: January 11, 2009, 15:07:50 pm » |
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there is a 3 step switch inside. if you drill a hole in the back you can put it to 4-6 and 8 cyl. found a instruction on the internet. i did it on my ovn..
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Zach Gomulka
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« Reply #7 on: January 11, 2009, 18:29:38 pm » |
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Thank's Died's! Planned on giving North Hollywood Speedo a call on Monday, but if this is a simple task that we can perform ourselves then I am very interested in that!! Bang, I can't find the info on the net  could you point me in the right direction?? Thanks everyone! |
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Born in the '80s, stuck in the '70s.
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SlingShot
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« Reply #8 on: January 11, 2009, 21:07:09 pm » |
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Why not just get a 914 tach?
Because the redline is too low and it only maxes out at 7 grand. Is the 1915 going to see over 7k rpm? |
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Will Race For Beer !!!
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Zach Gomulka
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« Reply #9 on: January 11, 2009, 21:13:13 pm » |
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Why not just get a 914 tach?
Because the redline is too low and it only maxes out at 7 grand. Is the 1915 going to see over 7k rpm? That will probably be absolute max, but I'd like to have a little extra on the dial. The 911S tach will suit the motor perfectly, redline included. |
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Born in the '80s, stuck in the '70s.
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bang
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« Reply #10 on: January 11, 2009, 21:57:27 pm » |
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hey zach think i have pictures somewhere will try to have a look. do you have a email.. dont know how to post pictures on this site
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Zach Gomulka
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« Reply #11 on: January 11, 2009, 22:02:52 pm » |
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hey zach think i have pictures somewhere will try to have a look. do you have a email.. dont know how to post pictures on this site
sacs67@yahoo.comThanks!!  |
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Born in the '80s, stuck in the '70s.
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bang
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« Reply #12 on: January 11, 2009, 22:05:37 pm » |
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yes got a picture of my own.. drill 2 holes in the back of the taco one switch is for cyl. think the other is to calibrate. anyone who can post my picture on the site.? big bang racing denmark  |
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Zach Gomulka
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« Reply #13 on: January 11, 2009, 22:51:49 pm » |
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Here it is... Could you explain a little more?? Which holes did you drill, and what has to happen once I get in there?
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Born in the '80s, stuck in the '70s.
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bang
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« Reply #14 on: January 12, 2009, 12:14:42 pm » |
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i drilled the two holes left from the middel. one of the switches are a 3 setp one the other one is a potentiometer. and the 3 step switch is for 4-6 and 8 cyl. it is some years ago i did it so i cant remember whitch one is what put think u can feel it if you try to turn it. think the top one is for cyl..  |
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Diederick/DVK
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« Reply #15 on: January 12, 2009, 12:21:14 pm » |
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why would you drill hose instead of taking the whole back of the gauge off?
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Diederick
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Proud member of:
DVK ~ Der Vollgas Kreuzers
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bang
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« Reply #16 on: January 12, 2009, 13:58:13 pm » |
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you cant take the back of. if you want to get inthere you need to take the front off and the glass out. to doo that you need to open the front as an tin can.. then you need to send it to vdo to get a new front ring on..
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airstuff
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« Reply #17 on: January 12, 2009, 14:02:02 pm » |
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interesting  |
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Diederick/DVK
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« Reply #19 on: January 12, 2009, 14:26:02 pm » |
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you're right uncle keith.
but is there truly a switch?
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Diederick
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Proud member of:
DVK ~ Der Vollgas Kreuzers
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bang
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« Reply #20 on: January 12, 2009, 14:31:08 pm » |
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on the on i had.. that was a 79 911 6 cyl.. changed it to 4 cyl.  |
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Diederick/DVK
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« Reply #21 on: January 12, 2009, 14:34:35 pm » |
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mine's 10 years older...
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Diederick
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Proud member of:
DVK ~ Der Vollgas Kreuzers
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Fastbrit
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« Reply #22 on: January 12, 2009, 14:39:05 pm » |
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mine's 10 years older...
I bet there is – VDO would almost certainly have used the same internals on gauges for a variety of cars. Interesting to check this out... |
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