Good info on vacumn readings

[C Body Bob]

this is a very useful chart to help understand vacuum readings. You guys who are not mechanics & have a running driving old car you want to fix up. This chart can save you some time & give a better idea on the engines condition. I've used vacuum readings for years. Even had a gauge mounted in my race car. Basically you want a steady & high reading. I use a vacuum gauge along with a timing light to tune carbs. Study the chart & it's easy to temporarily hook one up to your engine & sit it on the valve cover while you tune. Also an automotive stethoscope is very handy. You can hear valve train sounds & compare one rocker to the next. Just move along the valve cover & listen to each rocker. A rocker that is noisier than others is a sign somethings up & could be why engine is hard to tune. Both of these tools are avaliable at auto parts stores for around $15-20 each.

 

[Fratzog]

I have a factory unit on the console in the Monaco 500. The chart will be helpful.

 

[C Body Bob]

Another little tip. If you buy an old car that's not running & you get it running , but it won't idle smoth. Or there is noise from the valve train. Could be several things. However I like to check the push rods to make sure they are straight. Some times when an engine has sat for years the push rods get bent slightly once the engine refires. If this is the case. You can lay the push rod on a flat table with the bend on top & gently tab the push rod back correct. I've done this many times. It will run fine as long as you don't spin the motor hard. Correct this bent push rod & see if engine runs smoother & the noise is gone. Then replace with new if you want to

 

[live4theking]

Bob,
Could you post that chart in a fashion that it can be printed or a link to where you found it.
Thanks

 

[C Body Bob]

I got it off Facebook. You should be able to Google & find several just like it. I've seen them printed in several magizines

 

[C Body Bob]

I found it again. It's on the F,M,J & R body page on Facebook

 

[live4theking]

Thanks