Couldnt tell ya? Where do i measure from and at what trim height do i measure the prop at? All the way down i assume?? And what do you mean by ( how deep is the notch at the transom??)

Brad had me measure my X dimension. Its 5 1/2". He told me it needs to be atleast a half to 1 imch lower. So i guess i have to find a way to lower my prop height???? Any suggestions?

Have the drive to where the propshaft is level and take a long straightedge from the hull out to the drive. Measure down from the straightedge to the propshaft centerline. Brett at BBlades will want to know that number. Since it has a notched transom, I'm just curious how deep it is and how far it extends. I find it odd PQ was so far off on the transom cutout from the factory and that these boats run better with spacers. The purpose of the notch is to allow you to run the drives higher up, reducing drag. The notch feeds water up to the prop. If you have to bury the drive to get the slip numbers down, you have to wonder if the notch design is just plain off. Makes me wonder how these hulls would react to an extension box. I'm just afraid that if you drop the drive to where your slip numbers are good the drag will negate any gains and the speed won't increase. Just spitballing here...I'm definitely no expert.

All that makes sence. by lowering the prop it would put more out drive under water causing more drag. I know there is a way to tune this set up to get my slip # down. Bob280 ran 80 with the same HP and same boat. His was NA instead of blown. only diff.

with the numbers that bob gave me. i pluged them in and he was getting 16% prop slip. So i know its possible.

PQ did ALOT of playing around with X-dim on the 280's. Most run much better with a 1"-2" spacer. Thus I am not surprised on the numbers the OP is getting. Drop it down another inch!

If you already have a 1" spacer, you can a second 1" spacer to make 2" or remove the 1" and add a 2". Are you running a stock lower or IMCO/Speedmaster?

I agree. Drop it down and see what you get.

Ive got it Josh... the solution to all of your prop slip issues... and your fuel and noise issues too!!!

2 paddles would work much better, assuming the old lady would help