Measuring Device for Motors

[panic]

Go back to sleep.

[JackD]

Did it first.
It would seem that Dan is in the dark about the offset plug deal also.
And the CC Beaker works for more things.

[dwarner]

I'll admit that I don't understand. In the case of a 12 port GMC where the plug angle is 90 deg. to the stroke travel how does the tool make a right angle from the top of the stroke to the bottom of the stroke? How do you add or subtract for deck height?

[JackD]

Deck height ain't nuthin.
Deck height is not part of the stroke measurement.
You bring the piston up to TDC, zero the tool , and measure the travel to BDC. All of that assumes the tool travels straight the same distance as the piston. If the tool was at an angle to the bore, a 4 inch piston travel will produce a dimension that is greater depending on the angle.
If you are not straight over the piston with the tool any angle will produce other results.
In an angle plug application, fluid works best without all the monkey motion.

[jimmy six]

Dan. The Skinner plug is only a few degrees off verticle.

[panic]

[JackD]

I guess it would depend on if you were buying or selling.

[AlanGalbraith]

COOL.

I've let a record go, just because I didnt want to pull the heads of a bike.

look out.  

[Stan Back]

Jack D -- I'm not a techie, so maybe you could explain the liquid method to me.  How do you account/estimate/allow for seepage past the rings?

[JackD]

You are looking for a repeat each time you turn the crank from top to bottom. If you lose a bit each time as you say, A heavy oil like 90 weight or even STP will seal the rings with just a little bit and allow the rest of the fluid to be ATF that is normally used. You are not building any pressure in the jug beyond the weight of the fluid. Even that can be reduced to almost nothing if you lower the beaker after the air is out to reduce the overall height. Even air trapped in a angled chamber can be bled most of the way by opening a valve slightly after the fluid is introduced. The little mess required for the cleanup inside the jug is nothing compared to pulling the head. Ask Kott about the guy that required him to remove a head and then couldn't do the math after.