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-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   How much HP are my 540s? (https://www.offshoreonly.com/forums/general-q/288391-how-much-hp-my-540s.html)

articfriends 12-04-2012 11:28 PM
Originally Posted by MILD THUNDER (Post 3825428)
Like it was said, too many variables, but sure sounds like a nice parts list. Callies cranks, carrillo rods, Dart heads, jesel, tall deck blocks, etc etc. I can see those engines with a roots 10-71 making 900+ with maybe 7-8lbs of boost.

Don't know jack about Vortech blowers, but sure looks like they are overdriven just a little! 750HP should be easy on low boost mode with that setup.
They are overdriven even more than you think, the internal gear box steps them UP even higher, not sure what ratio Vortech uses but on my Baja I am running Procharger M-3s, the lower crank pulley is about 7.750, the blower pulley is 3.70 and the internal gear box is 4.44-1 UP,the blower on mine turns just about 10 times faster than the motor, at 6000 rpm's the blower is turning 56000 when I do the rough math, Smitty

articfriends 12-04-2012 11:30 PM
Originally Posted by 4bus (Post 3826080)
Dude, that is a cool ride.

Hope to see you in Abay this year
I second that, someone put ALOT of work into that old girl!!!!

abones 12-05-2012 10:31 AM
Originally Posted by articfriends (Post 3826581)
They are overdriven even more than you think, the internal gear box steps them UP even higher, not sure what ratio Vortech uses but on my Baja I am running Procharger M-3s, the lower crank pulley is about 7.750, the blower pulley is 3.70 and the internal gear box is 4.44-1 UP,the blower on mine turns just about 10 times faster than the motor, at 6000 rpm's the blower is turning 56000 when I do the rough math, Smitty
Smitty

I asume that your are about maxed out with that unit? I would love to see that boat in action!!!!!

articfriends 12-05-2012 05:37 PM
Originally Posted by abones (Post 3826741)
Smitty

I asume that your are about maxed out with that unit? I would love to see that boat in action!!!!!
I'm actually turning it PAST its rated rpm although I was mistaken on the internal gearing which is 4.10-1 not 4.44-1, looking at the ati website I see they changed the rating of the m-3sc to 50,000 rpm's, it used to show 48,000 from what I remember. I turn my motor as high as 6200 and with the new cam I pput in this summer when I freshened it once I get it tuned perfect again I may turn motor as high as 6400, Smitty
I exploded a head unit once a few years ago too so they are NOT indestructable but seem to hold up decent even wicked up!

Rambocj7 05-21-2013 02:10 PM
Ok, so I still dont know the answer, but bit of an update:
-Turning 17 3/4 31P 4 blade props

Took her out on the weekend and GPS'd 80 MPH at 4300 RPM with 13 ppl on board and a FULL (600 litres) tank of fuel! Still had a lot more throttle and more trim too! :)


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