Well, I know that's a deep subject for this shallow mind.

Griff, agree early on in the thread it was said this would be a waste of money and I should go buy another boat. Reason to not buy another was simple, I like this one, and it would cost a minimum of 80K to get another, my guess more, and then I have another set of unknown problems.

Stimleck, agree it could be as simple as the boat was doing max with one engine, and not much else would help. That is other then have two engines, test shown a 27PC with two 320HP engines does 50 MPH. But that said they have a lot more weight but also have more blade surface in the water

Knot also agree, the XR takes more HP then the standard but it isn't that much more is it (5 to 10HP)?

liquid, Nothing was done with the throttle body, yet the engine "dyno paper work" says it produced 545HP and 617 TQ. Original engine was stock 415HP MPI and was not dynode, also was running real rich. My guess would be maybe it had 400 if that.

In all its probably a lesson learned. Wanted more power, got more, felt real good in the beginning about having a pro do the work. In the end it cost in the range if 43K for everything, well only paid 48K for the boat in 2000. Maybe I'll get another 15 years out of it.

I do have a lot of spare parts to sell now, maybe I can recoup some of it :lolhit:

AllDodge - you aren't the only one feeling this pain. Three years ago my Scarab 3 ran 52mph at 4600 rpm with old 365mags with 22p Bravo props. Last year it ran same but after upgrading motors to 500hp on dyno. I know I had carb issues with running rich but season ended before really tuning it in. This year I added 177 blowers and new carbs, 64mph at 5k rpm with 24p Bravo 1 props. An increase, YES, but not as much as I thought I would have over the tired 365mags. dyno now says 630hp. I'm almost done "chasing it". I'm going to try new exhaust tips, right now I have the Corsa quiet tips that have the double pancake baffle in each. I'm thinking this might be hurting the WOT with too much back pressure.

anyways, I'm sticking with this boat as I now now it inside and out and I'll just deal with the speed I have........for a while to come.

Had the same tips on mine and builder said I they needed to go, to restrictive, I would suggest stainless turn downs, I really like them and very well made

Have to agree but sure wish someone would have explained this to me when I started. I would have still rebuilt the motor, but would have done it my self and wouldn't try for 500 + HP

All Dodge.

Lets back up a little, if you have a honest 120 more hp you should go faster.

Is the power real? (as in when installed does it make the noted power)?
Can you run a XR bravo 1 lower instead of a bravo 3?
Does the boat have a hook?
Is the bottom reasonably smooth?
How deep is the drive? Do you need to raise it?

I would love to see this boat make some gains.

Cheers,

Is it making 120 more? well the paper work says it did, and I have no reason to doubt other then the boat isn't doing much different

I could install a B1 but it has a hard enough time coming up with the B3, and there is less blade area

Yes the boat has a slight hook on the out side edges, about 2 foot on each side

Bottom is fairly smooth, put some fresh bottom paint on it after sanding before it went back in the water this June

The drive is where it was from factory install, the cav plate is at the bottom edge of the keel. Will take another look when I pull it out in a month or two

Have friends over this week end. With almost 3/4 tank gas, 7 folks on board she came right up, sure it was a few seconds slower but she did come up. This boat has never come up that smooth with this amount of weight. So I will say it does have more torque, and the new prop is working

It would be interesting to see what it would do with a Bravo 1 and a bravo 4 blade prop.

Chris

What all was done to the engines for the power increase?

engines were done by eddy young, they can be taken out of the equation because they will be exactly as promised by him

Well you should have said that at the very beginning and he could have saved that dyno money

Was not an option, was listed as part of the first bill handed to me in the beginning.