scarab28, those are great numers! I have a 502, procharger M1 7-9 psi (Ive seen both), my boats about 4000# and it rips! Do you have a 28 wellcraft? Greg

Boy Id like the M$ and a 504 or a tomcat intercooler.

The bigger the procharger the happier you'll be!

Sounds like you need a Max MachineWorx Bravo style drive. At the boat show they said it will handle 1200HP.
On;y $16,000, funny how that's the same price as Arneson ASD6 conversion and about the same as Konrads conversion.

Nice Dyno numbers!!!

HP Junkie - Yes - It's a 28' Wellcraft Scarab Excel. I was runing a 28p Bravo I with a procharged 454 ( 75 MPH). I'm going to start with a 32 B1 and see what happens. Hope to see mid eighties. Now go away ICE.

Payton, I started off with the teague platnum xr, I broke the vertical shaft just cracking the throttle at 120. I moved on to the Max shafts, top cap and gears. Everything is holding up except for the gears, I know I'm over powering the unit, it's my fault that they break. I'm looking at drive options as we speak.

GPM you need a BMAX on your boat! Rod at Perf Marine has several of these behind big power on big boats and they have held up. There was some negative press on these when they first came out, but those issues have been resolved from what I have been told. It may cost you a few MPH, but I think you have some to spend!!

Very nice numbers on Scarab 28!! Yes you will likely have to consider a drive upgrade as well!!

Craig

Nice, Tq peak at 4600 and Hp at 5400-5600. 900/900 is a nice number. What boost are you running? Is that man pressure in inHg? 11-16? I believe it would be about 5-8 pounds boost. Whish is about right 540CID 1.1Hp/CID = 600HP and 8pounds/16 = 900HP.

B-max uses the same lower gears.

True! But if the lowers can handle the abuse HTM puts them through drag racing their 24 turning mid 9's at 120+ MPH I'm pretty sure they should live on a pleasure boat. Even if it is approaching 150 MPH!! The only lowers I have really heard of are prop shafts or if they were set up wrong. Normally the top is the weak link and breaks first. With your 1300 HP motor and RPM who knows!