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ARPM Case - Cam Sensor?
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risk
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PostPosted: Tue Feb 05, 2013 10:07 am    Post subject: ARPM Case - Cam Sensor? Reply with quote

I'm running an old ARPM two piece case.. noticed the indention and I started thinking..

Is the indention in the casting in this area meant to be machined for a cam gear sensor?

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Dale M.
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PostPosted: Tue Feb 05, 2013 10:19 am    Post subject: Reply with quote

Doubt it..... Cam sensor were never really a VW thing.... Only real sensor was on flywheel for diagnostics.....

Dale
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risk
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PostPosted: Tue Feb 05, 2013 12:14 pm    Post subject: Reply with quote

So, if not for a cam sensor, what is the indention cast in there for?
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bug66
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PostPosted: Tue Feb 05, 2013 12:58 pm    Post subject: Reply with quote

Dale M. wrote:
Doubt it..... Cam sensor were never really a VW thing.... Only real sensor was on flywheel for diagnostics.....

Dale


I do agree on stock engines. But on an ARPM case?

What else (if it is for a sensor at all) could it be for?
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Dale M.
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PostPosted: Tue Feb 05, 2013 1:33 pm    Post subject: Reply with quote

How just about a characteristic of casting.....And nothing more...

Dale
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Steve Arndt
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PostPosted: Tue Feb 05, 2013 3:40 pm    Post subject: Reply with quote

Go for it!

http://www.badbugracing.com/cam_sensor.htm
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SRP1
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PostPosted: Tue Feb 05, 2013 5:07 pm    Post subject: Reply with quote

Let's not speculate...Instead take a measurement from the centerline of the cam to that detent, and see if it makes sense for a cam sensor location.
I don't think that's a casting characteristic, but who knows.
I'm leaning more to the fact that it may be a possible sensor location, but only a measurement will tell. From the pic it looks a little to far outboard????
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lostinbaja
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PostPosted: Tue Feb 05, 2013 6:22 pm    Post subject: Reply with quote

If I'm not mistaken, ARPM cases were out of production long before crank position sensors were used, let alone cam position sensors. I could be wrong?
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mcmscott
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PostPosted: Tue Feb 05, 2013 7:42 pm    Post subject: Reply with quote

lostinbaja wrote:
If I'm not mistaken, ARPM cases were out of production long before crank position sensors were used, let alone cam position sensors. I could be wrong?


The boss may be in a correct(kinda) location but,,, Ding! Ding! Ding!
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SRP1
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PostPosted: Tue Feb 05, 2013 8:57 pm    Post subject: Reply with quote

lostinbaja wrote:
If I'm not mistaken, ARPM cases were out of production long before crank position sensors were used, let alone cam position sensors. I could be wrong?


Anyone know the last year of production for those cases?
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risk
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PostPosted: Wed Feb 06, 2013 7:38 am    Post subject: Reply with quote

SRP1 wrote:
lostinbaja wrote:
If I'm not mistaken, ARPM cases were out of production long before crank position sensors were used, let alone cam position sensors. I could be wrong?


Anyone know the last year of production for those cases?


From what I have read the cases were produced from 1982-1985, and A-RPM was sold to Dee Engineering in 1988.

Got that info from this site:

http://deanodyno-soars.com/history.html

I was thinking about starting a thread dedicated to A-RPM stuff. So far I have the case, the generator stand, and an air filter top. I know that they also made heads and I've seen an A-RPM shifter for sale in the classifieds before.
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risk
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PostPosted: Wed Feb 06, 2013 7:59 am    Post subject: Reply with quote

Steve Arndt wrote:
Go for it!

http://www.badbugracing.com/cam_sensor.htm


It looks like the indention on my case is about the same distance from the cam centerline. I will measure and post what I find.

Is this your engine? I was wondering how you balanced the cam and gear..
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Stripped66
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PostPosted: Wed Feb 06, 2013 9:38 am    Post subject: Reply with quote

risk wrote:

From what I have read the cases were produced from 1982-1985, and A-RPM was sold to Dee Engineering in 1988.


FWIW, later cases did not have that indentation in the casting.
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flyboat
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PostPosted: Wed Feb 06, 2013 9:56 am    Post subject: Reply with quote

Are these cases special in any way?
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SRP1
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PostPosted: Wed Feb 06, 2013 11:40 am    Post subject: Reply with quote

Looking closer (not on my phone) it looks like a drill index mark.
It appears to be in the same location as the oil galley restrictor/plug on
a stock factory case.
I'll bet that's all it is....
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