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-   -   454 with 177 blower build (https://www.offshoreonly.com/forums/do-yourself-boating-budget/322794-454-177-blower-build.html)

mike tkach 02-05-2015 06:00 PM


Originally Posted by ramos45 (Post 4260950)
Outstanding! I'll be running all this by the dyno guy when the time comes. My current plugs are NGK heat range 8 to start with as well.

as long as it is not a projected tip plug you will be good.

SB 02-05-2015 06:22 PM

Ski Doo and especially Yamaha's have overly enthusiastic Speedometers.

Just so you know.

:funnypost:

I wish more people where into sandbagging.

This schit sucks.

All I need is a full dyno sheet and I can tell you if inflated or not. Not really difficult.

A pair of "365's" in a flat bottom cig or beak boat running 89.8mph would get me all wet !

Or a pair of real 1200hp motors running '58mph' would make me have a man crush.

Lollllllll.

F-2 Speedy 02-05-2015 06:32 PM

I gotta a GX345 JD putting out 27hp at the diff. closed cooled Kawi with a 54in deck, turf tires front and rear, 8mph, full hydro, top that

xxxxxxx1 02-05-2015 07:07 PM

1 Attachment(s)

Originally Posted by mike tkach (Post 4260935)
nice looking boat!what is top speed on gps?

Thanks Mike for the compliment.
I had it at 84 mpg on GPS without maxing it out completely ,
it could go a bit more I would think.
I was on the intercostal and trying not to be too
irresponsible, conditions were favorable during the weekday ,I was idling out of a local unnamed restaurant with the local Sheriffs office boat . They thought it was pretty cool wanted to see it go and see what it sounded like,
Maybe I over did it a little bit..
(The speed limit is 30 mph)
[ATTACH=CONFIG]536628[/ATTACH]

proboat-wes 02-05-2015 08:15 PM

750hp a hand grenade waiting to happen,heat build up has to be huge if you can even spin it fast enough to make 750 hp before piston melt on the dyno, 3 years back I did hp 500 with old bm 250 blower and intercooled and got 785 at 5300 rpm,alot more motor in my opinion,but ill look forward to the build also of this.

bck 02-05-2015 08:51 PM


Originally Posted by mike tkach (Post 4260946)
don,t tell anybody but the one we ran last week is built for 89 because that is what his marina has.peak power was at 35 total with no signs of detonation.it will be 33-34 in the boat.

How much of a difference in power do you expect when building for different octane ratings, all else being equal?

mike tkach 02-05-2015 08:51 PM


Originally Posted by proboat-wes (Post 4261024)
750hp a hand grenade waiting to happen,heat build up has to be huge if you can even spin it fast enough to make 750 hp before piston melt on the dyno, 3 years back I did hp 500 with old bm 250 blower and intercooled and got 785 at 5300 rpm,alot more motor in my opinion,but ill look forward to the build also of this.

i think you are confused,the op never stated 750 hp.reread the thread.stop at post 9.

proboat-wes 02-05-2015 09:45 PM

mike I was responding to post #4 statement so no im not confused,but thanks for the comment..

mike tkach 02-05-2015 10:05 PM

gotya.

sutphen 30 02-06-2015 05:06 PM


Originally Posted by MILD THUNDER (Post 4260833)
To sum it up you are saying you think my combo is not making the power it is? .

what blower,heads and cam do you have again?


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