On 06/17/2011 07:10 PM, Bill Bradburry wrote:

If the prop load was maxed out, the rpm would not increase, but the MAP could go up.  It sounds, tho, like this might not have been the case since Earnest felt the prop was not pulling.

 

Bill B

 

First, the prop definitely was not pulling with any significance.  The most it could do was scare my wife, and blow over a fan that I had sitting on top of a 5-gallon bucket.  I'll fix that this weekend.

Second, if the prop limits rpm, the MAP will not continue to increase.  The blower is tied to the prop with a 3.18 gear ratio.  Since it won't turn any faster, it won't be able to raise the MAP any further.