Compression Test

[James_Douglas]

It has ben a good year and over 2K miles since I put the new engine in the Desoto. Below is the compression test results with all spark plugs out and the throttle closed and the engine hot.

DRY________WET

1: 145________146

2: 140________148

3: 137________148

4: 136________146

5: 145________149

6: 146________149

James

[dirty dan]

Not bad at all!

[Niel Hoback]

Just for us, try it again hot with the throttle wide open. See if it makes any difference, I think it should.

[Don Coatney]

Just for us, try it again hot with the throttle wide open. See if it makes any difference, I think it should.

Niel;

Bet it does not make any difference.

James;

Your engine is very "sound". Did you mill your new head?

With these numbers your compression ratio should be over 8/1.

Did you get my note on a dual point conversion?

[Niel Hoback]

Thanks Don, that makes good sense the way the book explains it. But then, I guess we should always check the book first.

[James_Douglas]

I have done it with the carb open and as long as ALL the plugs are out it makes no difference.

The block was milled to clean it up and I CC the head and had it milled until I figured I was close to 8.5 to 1. I did not dare go much more than that for fear of the detonation and the head gasket leaking.

Don, I din NOT see anything from you on duel points...

James

[Don Coatney]

I have done it with the carb open and as long as ALL the plugs are out it makes no difference.

The block was milled to clean it up and I CC the head and had it milled until I figured I was close to 8.5 to 1. I did not dare go much more than that for fear of the detonation and the head gasket leaking.

Don, I din NOT see anything from you on duel points...

James

Just sent you a private message.