Degree Wheel, Download?

Here it is ...
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DAMN - just bought one last night. lol.

 

This has to be for a specific Ferrari type, I would assume, since the camshaft characteristics are different from engine type to engine type. What was the original Ferrari type for which it was created? Obviously the degree wheel alone without camshaft markings works for everything.

Taz
Terry Phillips

 

Where and what is it like?

Here's a download I found: http://www.tavia.com/free_degree_wheel.html

 

ordered this one last night : http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2DG1057&N=700+400304+301620+115&autoview=sku

 

Not sure if this wheel is accurate for the 348. Given the 348 open and closing numbers:

Intake open @14* closed @ 53* Exhaust opens @ 53* closed @ 10*

the wheel shows a difference (ie. Intake is open @13*).

Of course you would still have the value of a 360* wheel

 

I can't see it?


Jay


PS : I use a degree wheel from "ZEX", which is steel and cheap.

 

its the template posted by eric355 - above

 

Can check these out as well: http://www.compperformancegroupstores.com/store/merchant.mvc?

 

You do NOT need any special degree wheel for any particular car. All you need is a disc marked out to 360 degrees. You must also remember that the crankshaft rotates twice (720 degrees) to the camshafts single 360 degree rotation. Once you fully understand what the terms TDC, BDC, BTDC, ATDC, BBDC and ABDC mean, and when you understand the opening and closing points listed in the OWM, you will be able to tackle this job.

I couldnt find a degree wheel locally that would work with my 308, so I drew one out on a sheet of aluminum the size I wanted using a round protractor, cut it out with snips and bolted it on.

Intake valves open Before Top Dead Center (BTDC), and close After Bottom Dead Center (ABDC). Exhausts open before BDC (BBDC), and close after TDC (ATDC). The intake and exhaust are both open at TDC in the overlap phase. If you get a degree wheel on the engine, a pointer to point at the wheel, a dial indicator on the tappet, and start turning the engine (plugs out helps), youll soon comprehend the opening and closing points.

Before beginning, I would suggest you verify true TDC by dial indicator on the piston, or preferably by piston stop method, and reindex the adjustable plate at the flywheel if neccesary.

 

Don't take it as a Ferrari specific degree wheel. It is from the net and most probably for another brand of car. Its only interest is the 360° marking. That is all what you need for a correct timing adjustment ... in addition to the figures specific to your model