RV-6A / O-320 / Carb / Catto FP
At WOT cruise power (8K DA), I have a spread of about 1+ GPH (#4 is the richest, but the others are pretty close) and is manageable, however, in analyzing my EMS data, it appears that my #1 cylinder isn't getting enough fuel in cruise climb (140 MPH). I have an FP and most of my climb is around 2500 RPM. #'s 2-4 are all in the 200 degree ROP range. However, #1 is around 100 ROP. Not surprising, the CHT is around 20-30+ degrees higher than the others. I am well under 400, but ambient was only 30.
I don't want to drill the jet out any more, as 2-4 seem to be where they belong. Any ideas here? It doesn't seem like an intake leak, as it is in range at lower MP's and at 29.5 MP, there is very little vacuum, so a leak wouldn't seem to account for this.
Any thoughts or ideas here?
EDIT: I should clarify my request here. I am wondering 1) is 100 ROP a problem I should be concerned with and 2) is there anything that I should be checking or can do to resolve this, short of drilling out the jet larger still (at .039) now
Larry
At WOT cruise power (8K DA), I have a spread of about 1+ GPH (#4 is the richest, but the others are pretty close) and is manageable, however, in analyzing my EMS data, it appears that my #1 cylinder isn't getting enough fuel in cruise climb (140 MPH). I have an FP and most of my climb is around 2500 RPM. #'s 2-4 are all in the 200 degree ROP range. However, #1 is around 100 ROP. Not surprising, the CHT is around 20-30+ degrees higher than the others. I am well under 400, but ambient was only 30.
I don't want to drill the jet out any more, as 2-4 seem to be where they belong. Any ideas here? It doesn't seem like an intake leak, as it is in range at lower MP's and at 29.5 MP, there is very little vacuum, so a leak wouldn't seem to account for this.
Any thoughts or ideas here?
EDIT: I should clarify my request here. I am wondering 1) is 100 ROP a problem I should be concerned with and 2) is there anything that I should be checking or can do to resolve this, short of drilling out the jet larger still (at .039) now
Larry
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