degree pulley ring timing

Glenn · Posted: Mon Dec 22, 2014 3:13 pm Post subject:

This is my 25 year old Berg pulley.

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fes · Posted: Mon Dec 22, 2014 3:13 pm Post subject:

busdaddy · Posted: Mon Dec 22, 2014 3:15 pm Post subject:

I use a cheapo degree pulley I picked up at a swap years ago, slip it on and set it to 0 then carefully slip it off and slip on the stock pulley without turning the engine, mark stock pully appropriately, repeat as necessary for 7.5 or 28 BTDC, reinstall bolt in stock pulley and put cheapo pulley back on shelf, done.
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babysnakes · Samba Member Joined: August 19, 2008 Posts: 7106

I have printed and used the ring Glenn posted in the past. It works well and the size is about right. If you do not want to remove your pulley, find the center of the print and using a few bits of clear tape, jockey it into position. Take your time and get it right. Measure (check) twice, mark (cut) once.

aeromech · Posted: Mon Dec 22, 2014 3:18 pm Post subject:

Glenn · Posted: Mon Dec 22, 2014 3:21 pm Post subject:

aeromech · Posted: Mon Dec 22, 2014 3:26 pm Post subject:

So which is the better deal?

If I bought one now it would be 40 years too late.
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Wildthings · Samba Member Joined: March 13, 2005 Posts: 50338

Buy a degree pulley and upgrade to the heavier style to get the get extra benefits. Kill two birds with one stone and be done with it. Etched is better than a stick on label.

Swapping out the pulley may take longer than 45 seconds, but it shouldn't take longer than 15 minutes.

Or using your old stock 7" diameter pulley you can make a mark 1 3/4" over from TDC for 28°.

fes · Posted: Mon Dec 22, 2014 3:30 pm Post subject:

For the most part some excellent input.. so I'm thinking as follows...
Get a good quality degree pulley
Print off method..
Bus daddy's trick is quite smart, but if I'm gonna pull the pulley off, I might as well replace it..
Leave it alone and do what i've been doing for 20yrs with white out and do measure for the 28 degree mark

fes · Posted: Mon Dec 22, 2014 3:33 pm Post subject:

Wildthings · Samba Member Joined: March 13, 2005 Posts: 50338

fes · Posted: Mon Dec 22, 2014 3:40 pm Post subject:

i guess the work with a stock belt?

SGKent · Posted: Mon Dec 22, 2014 3:58 pm Post subject:

what you don't want is what is called a "Power pulley." That is a dune buggy pulley designed for a light rail where the fan speed is reduced to save HP.

A SCAT one will be fine. So will Gene Berg. Even an Empi one will be better than nothing. As to finding top dead center. There are many ways. On a Type 1 engine the plug is so close to straight up that you can use a long screwdriver and rock the engine forward and backwards until it starts to move and watch the puller as TDC will be in between. If you want perfection and have a dial indicator and magnetic base you can drill a small indent in the middle of the screwdriver plastic handle to set the dial indicator into then go either .020" or .050" drop in each direction and mark the middle.

As to paper degree wheels. Change the % of the image in your print settings. If your print driver doesn't have that, open it in Paint or a photo editor and change it there.
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aeromech · Posted: Mon Dec 22, 2014 4:13 pm Post subject:

The thing about measuring over 1 3/4 inches is that I can see a person missing the spot by a few degrees. Setting your timing too far advanced by accident would be bad. Why cheap out and risk it?
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wcfvw69 · Posted: Mon Dec 22, 2014 4:34 pm Post subject:

I've never liked the look of the degree'd pulley's unless it's a non-stock engine. I prefer the stock pulleys. '

What i've done is print off the degree wheel. I then cut just the portion I need and quickly tape just the one small part that goes from 0 to 32BTDC and tape it to the original pulley that's on the car. Make sure it's line up right and the use the small file to make 28 and 32 degrees. Takes minutes and is accurate.
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fes · Posted: Mon Dec 22, 2014 4:51 pm Post subject:

Tom Powell · Posted: Mon Dec 22, 2014 4:53 pm Post subject:

airschooled · Posted: Mon Dec 22, 2014 5:06 pm Post subject:

Tom you could rotate it but then the watermark would be upside down Laughing

One thing I didn't see mentioned was the weight of the pulley. Along with the stock weight flywheel matching a stock-weight crank, the correct weighted pulley is equally important. Managing crank flex and harmonic vibration are important to engine longevity. I would not recommend one of the "lightened" pulleys for this reason. Berg makes stock and heavier pulleys, but I'm sure they did tests to see what engine/RPM combo needs which weight.

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fes · Posted: Mon Dec 22, 2014 5:13 pm Post subject:

jakokombi · Posted: Mon Dec 22, 2014 7:30 pm Post subject:

Funny, I have that same Berg pulley and it's that same weird color.
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