27 Flybridge conversion from I/O to Outboard

[3rdday]

Hi Everoyne,
I wanted to solicit technically based opinions; I know i'm about to get my ass kicked for thinking of putting a single on a heavy 27' boat.
I have sold the outdrive on my Moesly 27 Flybridge Seamaster, and I believe Im going to get the $ I want for the Bravo 454. I have already purchased a Bracket 30" setback that will fit nicely.
I plan to repower with a single new 300 E-tec, I came about this decision based on these facts and theories;

I am doing this for economy not high speed - thus 1 engine- I DO NOT PLAN ON SELLING, EVER. The EXTRA 12K for twins buys allot of fuel.
My old set up was supposedly 310 Hp at the prop
Bracketed set ups are supposedly 10-15 % more efficient
The boat will weigh about 800 (15%) Lbs Less
Etec has good fuel economy and can NOW tell you best throttle position on the fly.
I am not concerned with reliability, it will be a new motor, and I have Seatow, two VHF, Cell Phone, and EPIRB, and overkill on safety flotation devices.
Two strokes provide power on every stroke, versus everyother on 4 strokes.
The Seacraft Bottom itself is more efficient than other hull bottoms.
I have seen other 28' with single Etec perform well , not quite as heavy but close.

What do you all think?

[shine]

If you plan to keep it for a long time, I think that set up might be hard to sell to others. It might look a little funky.

No technical reason to not do it, just have to get the weights right.

BUt if the plan is to keep it for many year, run it a lot, then I would pay the extra now if for only the pleasure of having no noise at idle.

I think if you figure a couple hundred hours of use per year (with one motor you will probably run it all the time while your out), the efficiency of a 4strk at idle is huge over a 2stk.

The FWC guy who came to inspect my boat damage last night said he picked up a 300 Suzuki rigged for under $17k from a dealer down south, I think he said it was in Pompano

[gofastsandman]

E tecs are much more efficient at low rpm than 4 strokes. Carb`d smokers? Yeah, they suck fuel at low rpms. Lots.

E tecs are DI.

Brian, a Mike Wilson recently came by our shop. His SUV had a 7 marine sticker on the rear window. He said Monty Racing was making E tecs outta old V8 300 Rude blocks. Said they take 2 fuel rails from the v6 motahs, cut and weld them for v8`s and are making north of 500 @ the prop.

Mike said Yamaha has offered Gordon boat loads of cash for his technology. Monty racing is the go to shop for Rude racers. He can build for longevity as well.

http://www.montyracing.com/index.html

I think you may be a little heavy for a single 300. Send your queery a little south maybe.

The old 21 ran with Homelite 4 strokes. 55 Bearcats. Based off of the Crosley modular design.

You may be suprized by that torque. Mr. Denny`s 150 jumps out of the hole. And I do mean hang on.

Cheers,
Us chickens

[3rdday]

Thanks Joel you rig is looking nice!!

I would gain 300lbs over 2 stroke with a 4 stroke

I can get a 300 etec for 19k

Sandy
I was considering one of the old 300 v8 4.0. They hold the speed record for single OB.
They are fuel pigs. There was a stock motor tuned on the dyno @375hp.

I was already aware of Monty and their history with the ole v8s.



I'm glad to learn the 300 etec can be pushed for more power
You answered a question I never posed, I wondered if the etec 300 could be modified for more POWER.

[gofastsandman]

Originally Posted by 3rdday

Thanks Joel you rig is looking nice!!

I would gain 300lbs over 2 stroke with a 4 stroke

I can get a 300 etec for 19k

Sandy
I was considering one of the old 300 v8 4.0. They hold the speed record for single OB.
They are fuel pigs. There was a stock motor tuned on the dyno @375hp.

I was already aware of Monty and their history with the ole v8s.



I'm glad to learn the 300 etec can be pushed for more power
You answered a question I never posed, I wondered if the etec 300 could be modified for more POWER.

Brian,
I don`t know what Monty is doing with the E tecs.

They are making the old V8 carb motors into DI "Etecs" which produce the big numbers.

[Bushwacker]

Originally Posted by 3rdday

. . . I'm glad to learn the 300 etec can be pushed for more power
You answered a question I never posed, I wondered if the etec 300 could be modified for more POWER.

Brian,
The only way to "push" any E-Tec (or ANY modern clean engine) for more power is to push it SIDEWAYS and install another one next to it!! (BTW, the idea for a twin-size bracket would really help resale value on that Seamaster!) Emissions regs have the OEMs on a pretty tight leash when it comes to souping up the motors. Not that it CAN'T be done by someone like Monte racing if they had a way to reprogram the EMM, but there is no off-the-shelf "tuner chip" you can buy to increase power.

However BRP uses the exact same E-Tec technology along with some variable-area exhaust ports to get 160 hp out of an 800cc production snowmobile motor!! It probably has to meet some sort of emissions standards, and that would translate to getting 680 hp out of that 3.4L powerhead! They certainly aren't working it too hard at a rating of only 300 hp! If anyone wanted to start a HP war with BRP, they clearly have the weapons to be seriously competitive, so who knows what they'll come up with in the future given enough market demand! Denny

[gofastsandman]

Originally Posted by Bushwacker

Brian,
The only way to "push" any E-Tec (or ANY modern clean engine) for more power is to push it SIDEWAYS and install another one next to it!! (BTW, the idea for a twin-size bracket would really help resale value on that Seamaster!) Emissions regs have the OEMs on a pretty tight leash when it comes to souping up the motors. Not that it CAN'T be done by someone like Monte racing if they had a way to reprogram the EMM, but there is no off-the-shelf "tuner chip" you can buy to increase power.

However BRP uses the exact same E-Tec technology along with some variable-area exhaust ports to get 160 hp out of an 800cc production snowmobile motor!! It probably has to meet some sort of emissions standards, and that would translate to getting 680 hp out of that 3.4L powerhead! They certainly aren't working it too hard at a rating of only 300 hp! If anyone wanted to start a HP war with BRP, they clearly have the weapons to be seriously competitive, so who knows what they'll come up with in the future given enough market demand! Denny

Where does he come up with these beautiful thoughts?

[3rdday]

I have heard many times, and even from the Etec Techs that the 300 hp is capable of reliably delivering 80 hp per cylinder!!!!

[Fr. Frank]

Originally Posted by gofastsandman

Where does he come up with these beautiful thoughts?

Ain't Denny amazin'?

[gofastsandman]

Originally Posted by Fr. Frank

Ain't Denny amazin'?

Yes.

Yes he is.

Cheers,

Me.