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2007 R1- cant get exhaust cam to degree correctly, help please.?
Hopefully someone here with some knowledge can help me out.
I have degreed the intake cam to 107 but the exhaust at the stock location i am getting 79?? Stock is suppose to be 105 on both. Im not sure what the hell is going on. I can get the exhaust cam up to 101 but that is with the sprocket all the way to one side on the slot. And at that point the stock timing mark is WAY off.
I have no idea what is going on and why the intake cam out just fine but the exhaust is soo far off.
The head and cylinders have been milled so checking the timing on stock marks is out of the question
I am using the YEC method of measuring the event angle. The maximum lift method. 2mm before and 2mm after cam maximum lift then divide by 2.
Any thoughts would be greatly appriciated.
1 Answer
- Shaun H-ALv 78 years agoFavorite Answer
Have you tried checking it at say .050 below max lobe lift, and on both side of max lobe lift..?
Check it there, add the two numbers together and dived by two.
With exhaust, it is all ABDC, and the intake is all ATDC.
You can also dial indicator the piston to true and absolute TDC, zero your degree wheel, and then rotate so #1 piston goes to 105 ATDC. Once there, Put the exhaust cam at absolute centerline of Max lobe lift, hold there and lock it all down.
camshaftshaun@gmail.com
Source(s): Camshaft design/manufacture, full competition race engine building/development, failure analysis of internal engine components, Carb blueprinting, drivability/MPG/durability expert, chem analysis of fuel, super-tuner.
