Knot 4 Me

I just checked and they are Stelling boxes as well. My guess is the prop shaft heights should be the same between the two boats. What drives you running now? Imco?

JaayTeee

Judging by the slip #, I'd say they are too.

I havent ran the 32 bravo's since I juiced it up,
but as I recall, the slip was like 23%

For comparison purposes at cruise, the bravos would
run 52 mph @ 3800 rpm, the max's run 55 mph @ 3500 rpm.

I run regular XR's.....the IMCO's have the same junk
XR gears from mercury in them, so there's no benefit as I see it. ( until you go to a SCX)

Knot 4 Me

Thanks for all the info! Once we get a true GPS number we'll call Brett at Bblades and get him working on a new set of props. Right now he is at 81 MPH at 5400 RPM but that is a non-GPS speedo. His speedo is actually fairly accurate and not too happy but my guess is the GPS number will be a tad slower and therefore the slip number will go even higher than 21%. Boat is an animal now once it rolls over but just doesn't have the speed it should have on the big end given the HP. What is your top end speed?

JaayTeee

Best it's done was 94 and some change ( then a vertical shaft
let go)

Depending on humidity it runs 88-92 under normal circumstances.

Knot 4 Me

My buddy was hoping for 88 MPH with the right props. I thought 85 MPH might be doable. Thanks again for all your help! I'll keep everyone posted with what props he goes with and the final numbers.

JaayTeee

He'll like the 5 blades, trust me.

Another thing ( with these high x boats) is try to move
some weight to the rear,( or get rid of the junk up front) since trim leverage is diminished, you cant carry the bow as well.

This has been a work in process for me, that I started
last fall, and as soon as I get done with the engines
in my buddy's Cig, I'll be back at it.

BTW, what did he do to get over 600 hp out of a set of 500EFI's ?

crayolacrazy

I agree you have to move the CG back
my propshafts are 3.75 below the boat ,my slip is 11.5 spinning props in no boxes 31p5x 5800 rpms running right at 100 mph, 800 hp aside .I did move as much weight back as I could and I carry two 55lb bumbbells one on each side,I noticed a few years back that it was faster with 3 people in back seat ,up stream .and easier to get on plain with the props deeper in the water.My swim platform is about 4 inches from the water compaired to stock boat its about 10 inches . I still have full gally fride full ,mico,porcelin head 20 inch flat sceen ac/heat . Its hard to belive that new with HO,s it did 71 mph. If its running good at the time of the shootout I would like to run . Just to say I did it. 89 mph with 625 hp 94 mph with 710 hp.

Quinlan

VERY Nice!

brian41

My 32 Caliber (became 33 Outlaw) runs 89.9 mph with Steliings boxes 2" up and 2 inch shorties. Engines dynoed at 624 HP and 605 TQ running stock 28 (15% slip) 4 blades on 1.50 XR's spinning 6000 rpm. With stock 30's it only ran 87 mph at 5600 rpm (21% slip) but the 30's needed more trim to get the rpm's up. I think labbed 30's will get me to the 90 mark I already have a set of 30 BBlades to try next month.

Knot 4 Me

Brad Smith rebuilt them for him. He's not too mechanically inclined so I'm not getting a lot of detail out of him. Nor have I seen the work sheets from Brad. My best guess is they are now 509's with some port work to the stock heads, a slight bump in compression, different cams, ECU reflashes, and larger injectors. Dyno numbers were 605 HP/600 ft. lbs. torque. Turning them 5400 RPM with rev limiters set at 5800. Set up to run on 89 octane. I know he did not go with aluminum heads.