What speeds are you getting with what horsepower?
My gps says 119 with a 572sc (941hp....with meth injection)
Is this off in your opinion? I dont wanna be called a liar over gps readings so any info would be appreciated btw.......i have no idea what gear ratio my drive is (teague platinuim) spinning a 27 5 blade ive heard this is a horrible prop for this boat so any info on that would be great

I had 830 hp with a 30 pitch bravo 1 prop 1.5 ratio and it did 105 mph.at 6300 rpm

I believe the gear ratio on the xr is changed in the lower

Yes it is changed in the lower

I responded to your other post if the 119 is on gps thats a great number, with 920hp and 940tq 1.36 gears at 5600rpm I am consistent 115 best 117 with 2 people 2000 SR with a imco drive. I have to look back at my notes but I was thinking you needed around 1000hp to hit 120, not sure of the meth impact I am only running 7.5lbs of boost. I do have meth on one of my snowmobiles but thats running 28lbs
Robb
p.s. I have tried lots of props even a 5 blade herring which was terrible on the top end....in any case your boat is flying

Ive been very lucky with this boat it runs amazing safe for my wife and daughter and it will run with the big boys I really want too run arneson conversion and whipple upgrade

Ive been very lucky with this boat it runs amazing safe for my wife and daughter and it will run with the big boys I really want too run arneson conversion and whipple upgrade

HI sorry I don't get on the site too often so it delays my responses...send me your email address and I will forward you some pics of my boat, motor etc. These hulls love horsepower as you can tell, whipples are awesome, I am not aware of anyone putting an arneson on them.
Robb

There are two of them out there. One was in Colorado and the other in AZ.

Thanks for the clarification, I was unaware. How did they work out? I know mine is very senstive to X dimension and when I tried raising the drive it didn't work out as it was already pretty high.
Robb