serious power increase

[stclairriverblaster]

I am well aware of exhaust reversion, its causes and prevention. I also know the market for marine exhaust, and am extremely knowledgeable in CMI exhaust products. My experience spans 2 decades, over those years I honed my skills in just about every engine manufacture, hull manufacture there is.
Would you take some time today, research water reversion, the factors that influence this phenomenon, and state possible solutions. Something with merit and back it up with a reference that we can all verify. In fact, there is a post on this site by “vinny p” a few years back that explains reversion, in my opinion the best critique on this subject ever typed. With his permission, I framed it and hung it on the wall in my shop for customers to read. I would take the time to explain this to you yet believe if you spend your time seeking the answers would benefit you more. While your at it, research about propellers, I’m sure a lot of folks are wondering what type of prop you planned to run on a bravo drive that would perform with exhaust induced water flow around it. X dimensions, center of gravity. Once again, provide references that we can verify, like a prominent web site, boat race team, something in a boat, not a car. ect. Have you found any other similar boats that have tried any variation of a 4 banger? Any results?

i am well aware of what water reversion is.. i just don't get how you cant understand how a dry exhaust will eliminate that.. water drawn in from river goes through water to air inter coolers then through the exhaust header. and then out the back of the boat.

i was planning on getting a 21 pitch chopper to start with and the exhaust induced water flow would only be active until i got up on plane. then it would act as a open exhaust with no effect on the water around the prop.


the biggest thing would be center of gravity but i think it wouldn't have a problem getting on plane because the more weight you have in the back the harder it is to get on plane.

and at engineer mike. i couldn't get my 454 to go because of the low compression ratio and wrong cam. they weren't suited for each other.the motor was slapped together. and i figured since my motor took a **** anyways. i really don't wanna deal with it.

could i build a big block that runs like a raped ape.. sure.. but id rather do it with a 4 cylinder to be different. ..

 

[engineermike]

...and at engineer mike. i couldn't get my 454 to go because of the low compression ratio and wrong cam. they weren't suited for each other.the motor was slapped together. and i figured since my motor took a **** anyways. i really don't wanna deal with it. ..

It would cost less than $1000 to put the 454 back together with more compression and the right cam. Plus, the 454 might actually run one day, versus the 40 psi Mitsu, which will never come to fruition.

 

[happy]

You just don't get it do you. So I'm done leading this horse to the water, you wont drink anyway. If you learn one thing out of this thread, be it this. Some of the best advice you get in life, is the advice you least want to hear.

 

[mkhammer]

Chuck I see you posted your boat for sale, I guess there goes the rice burner and the BBC.
Good luck with the sale.