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914World.com _ 914World Garage _ What am I looking at here? (Cam question)

Posted by: audio_file Sep 24 2016, 04:56 PM

Trying to figure out the guts of my 2.0 so that I can have my carbs tuned for the engine. How do I identify this, is this the bolt on web cam gear, or is it stock, and is the number on the cam significant?
Thanks
Chris
IPB Image

Posted by: audio_file Sep 24 2016, 05:09 PM

On further inspection (cleaning) the outside of the cam end cover says "patented dial in cams"

Posted by: Mueller Sep 24 2016, 05:15 PM

interesting, 0° , and +/- 1° to 2° adjustment.

Cannot tell from the picture which one was picked. (not 0° from that one picture)

Posted by: audio_file Sep 24 2016, 06:21 PM

Some cool info I've found (vwvortex)

QUOTE

There's a paragraph on it in Per Schoroder's book "Volkswagen Sport Tuning for Street and Competition". It's starts as full advance at low RPM and retards at high RPM. There is a bunch of weights and springs that centrifugally retard timing as RPM increases. Techtonics dyno it with about a 2hp gain down low without a loss on the high end. It was quite expensive at around $300.00.

Anybody have any more info?

Attached image(s)

Posted by: porschetub Sep 25 2016, 02:19 AM

Bob Walter dial a cam if I remember right,very old school.

Posted by: veekry9 Sep 25 2016, 03:31 AM

Attached Image
Statically adjustable,manual setting.
Back to back dyno and track testing to measure theoretical advantage.

https://www.google.ca/search?q=advanced+retarded+camshaft&espv=2&biw=1097&bih=546&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj646ilkarPAhULw4MKHV9eDfsQ_AUIBigB&dpr=1.75#imgrc=2gEhxcvC4mbTYM%3A

https://www.google.ca/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=dial%20indicating%20valve%20lift

http://www.badasscars.com/index.cfm/page/ptype=product/product_id=358/category_id=13/home_id=3/mode=prod/prd358.htm

https://www.google.ca/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=variable+valve+timing

As long as there have been piston engines,there has been variable valve and spark timing.
Really,clockwork derived from water wheel grindstones,for a millennium of industrial revolution.

/

Posted by: Racer Chris Sep 25 2016, 12:05 PM

The Dial-in-cams 914 cam was not automatic.
IIRC, only their belt drive external cam gears had that feature.

Posted by: Mark Henry Sep 25 2016, 12:40 PM

Advancing the cam will add more low end power, while retarding the cam will add power in the upper rpm range. Each does this at the cost of the other.
Advancing or retarding the cam also shifts the powerband up or down the rpm range.

The cam could be any brand with just a Dial-in Cam gear.

Posted by: audio_file Sep 25 2016, 01:56 PM

QUOTE(Mark Henry @ Sep 25 2016, 11:40 AM)

The cam could be any brand with just a Dial-in Cam gear.

And this is what I hope to figure out, what actual cam this is, can't seem to reference the "76" stamped on it to anything...

Thanks for the input on the cam gear everyone! The car put down 118hp with hit set the way you see it, so I don't see any reason to screw with it, just an interesting part I want expecting to find in there!

Posted by: Mueller Sep 25 2016, 03:18 PM

QUOTE(audio_file @ Sep 25 2016, 12:56 PM)

QUOTE(Mark Henry @ Sep 25 2016, 11:40 AM)

The cam could be any brand with just a Dial-in Cam gear.

And this is what I hope to figure out, what actual cam this is, can't seem to reference the "76" stamped on it to anything...

Thanks for the input on the cam gear everyone! The car put down 188hp with hit set the way you see it, so I don't see any reason to screw with it, just an interesting part I want expecting to find in there!

A 2.0 with 188hp?

Crank or at the wheels?

Posted by: audio_file Sep 25 2016, 04:09 PM

QUOTE(Mueller @ Sep 25 2016, 02:18 PM)

QUOTE(audio_file @ Sep 25 2016, 12:56 PM)

QUOTE(Mark Henry @ Sep 25 2016, 11:40 AM)

The cam could be any brand with just a Dial-in Cam gear.

And this is what I hope to figure out, what actual cam this is, can't seem to reference the "76" stamped on it to anything...

Thanks for the input on the cam gear everyone! The car put down 188hp with hit set the way you see it, so I don't see any reason to screw with it, just an interesting part I want expecting to find in there!

A 2.0 with 188hp?

Crank or at the wheels?

188 on my keyboard, haha! Thanks, typo fixed!

Posted by: r_towle Sep 25 2016, 05:58 PM

The best way to be sure would be to measure the timing and lift with a degree wheel and dial indicator mounted to measure from the push rod to make the math easier .