Vacuum with carb on explorer reading

[doublehfarm]

What is the typical vacuum reading on a carbed 5.0 explorer? Im getting about 15-16 with a reman long block with edelbrock performer and 1406.

 

[73azbronco]

explorer camshaft?

 

[doublehfarm]

Yes stock explorer cam

 

[Johnnyb]

What is the typical vacuum reading on a carbed 5.0 explorer? Im getting about 15-16 with a reman long block with edelbrock performer and 1406.

What altitude?

 

[doublehfarm]

southeast usa

 

[73azbronco]

should be 18-22. But, how does the needle act during test, erratic, smooth? There are some youtube videos on the subject to narrow the problem. Lots of things can result in low vacuum.