Degree wheel

[sheerider11]

How are you guys mounting these things?

I just got mine from motion pro, the hole is tiny. I was thinking about hitting it with the uni-bit to get it to go on to the crank, but maybe I just got the wrong one.

[Surfrjag]

Mine goes right on the crank. I use 2 flywheel nuts to keep it tight.

I dont see any reason you cant do like you said to make it fit as long as you can keep the hole centered

[sheerider11]

Mine goes right on the crank. I use 2 flywheel nuts to keep it tight.

I dont see any reason you cant do like you said to make it fit as long as you can keep the hole centered

I think the uni bit should keep it pretty straight. So I'm assuming that I just picked up the wrong one

[Wildcardracing]

You have to drill it out. 12mm as far as I know they only make one.

[Tony Doukas Racing]

Definitely have to drill it out.    I also made an aluminum spacer and use 2 flywheel nuts.

[sheerider11]

Alright,

I got it

[skywalker7374]

I bought one from wild card and it went right on my crank, I guess he must of modded it. It was a tight fit though.

[sheerider11]

Now how are you determining TDC

I have a dial gauge Im using. But it seems like a lot of work. That dwell time is about 8 degrees of movement. At least with the gauge I narrowed it down to within 1-2 degrees

[sheerider11]

Am I just over complicating it? Or is there a better/easier way to do it?

[Guest JohnTabata]

I use a dial indicator to find a pistons TDC on all motors. Make sure the dial indicator is mounted solid and parallel so your measurement is accurate.

[Pastrykiller]

What is your goal here?

[possum]

You dont need to find tdc if your simply trying to read duration.

[sheerider11]

 

What is your goal here?

Porting.

[sheerider11]

 

You dont need to find tdc if your simply trying to read duration.

Explain

[Wildcardracing]

fabricate a piston stop using a piece of bar. Bolt it between two of your studs. Rotate the engine forward and back to stop, make sure your are the same degrees before and after TDC when it contacts the stop. When you remove the stop, you will be able to rotate to true TDC. If you know the dome rise of the piston you can also set your indicator to zero at the piston stop and measure the upward travel to TDC, subtract the dome rise of the piston from this measurement to get your deck height. Keep in mind some pistons have stampings on the crown that raise from the dome slightly.

 

-Brandon