Offshoreonly.com - Looking for 400hp on 383's

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- - Looking for 400hp on 383's (https://www.offshoreonly.com/forums/general-boating-discussion/280998-looking-400hp-383s.html)

gary20099formula

11-13-2012 04:04 PM

Props

Quote:

Originally Posted by BBCLiberator (Post 3813697)

Thats a pretty big jump in prop. What RPM do you turn with the 25's?

5200 rpm now

gary20099formula

11-13-2012 04:08 PM

Sorry guys i effed up i am running 27 mirage plus @ 5200 with 500hps 80mph my speed did not change from 25p to 27p and i still jump right out of the hole with 27p. i need to get to the 28p 4 blades i belive to be where i want to... what do u think? Forgot that i traded props with another guy here at the end of season.. HAHA
I may repower neways to make 600hp each... OR whipple them..

sprink58

11-13-2012 04:41 PM

Quote:

Originally Posted by gary20099formula (Post 3814306)

Sounds like you are dialed in...don't mess with it uness you are just experimenting with it. Is you drive ratio 1.5? What is your RPM at 55~60?

So it sounds like 1000 HP does the deal to get 80 with BBC's. Has anyone done it with NA SBC's? I'm still thinking 850~900 does it with SBC's simply by virtue of the weight savings.

More empirical research required!!:evilb::evilb:

Uncle Dave

11-13-2012 05:40 PM

Quote:

Originally Posted by gary20099formula (Post 3814306)

Id try to borrow a set before I invested.

The 4 blades will bite the water much harder than the 3's and the effect can be dramatic.

At 80 MPH I hope you have some sort of external steering.

Uncle Dave

BBCLiberator

11-13-2012 08:31 PM

Quote:

Originally Posted by gary20099formula (Post 3814306)

Yeah that's pretty much perfect for RPM, maybe a labbed set of 28's to keep your rpm the same.

Uncle Dave

11-14-2012 10:45 PM

Diego,

You're killin me man- show us some numbers....

Uncle Dave

FIXX	11-14-2012 11:35 PM

Fixx

Quote:

Originally Posted by gary20099formula (Post 3814306)

sorry guys i effed up i am running 27 mirage plus @ 5200 with 500hps 80mph my speed did not change from 25p to 27p and i still jump right out of the hole with 27p. I need to get to the 28p 4 blades i belive to be where i want to... What do u think? Forgot that i traded props with another guy here at the end of season.. Haha
i may repower neways to make 600hp each... Or whipple them..

the props you want to try next is a 25 p merc revolution,,,fast as the mirage + but carries the boat better..

Crude Intentions

11-14-2012 11:47 PM

Quote:

Originally Posted by Uncle Dave (Post 3815399)

Diego,

You're killin me man- show us some numbers....

Uncle Dave

I'm with you uncle Dave. I wanna see his numbers.

Diego9040

11-15-2012 07:00 AM

Quote:

Originally Posted by I.C.U.Lookin (Post 3815417)

I'm with you uncle Dave. I wanna see his numbers.

I am going by the shop today at noon to see what is the delay,I want to see numbers as well, we have been waiting so long,right?

Crude Intentions

11-15-2012 07:27 AM

Quote:

Originally Posted by Diego9040 (Post 3815474)

I am going by the shop today at noon to see what is the delay,I want to see numbers as well, we have been waiting so long,right?

Exactly!! Lol. Hope your enjoying the formula. Mine is in pieces with interior and dashes being redone

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