goodboy

Thanks for the response... I thought the same thing... Not much I can do about it though I can live with the lower top speed a bit... But what do you think it would cost in mph? Say at 60?

goodboy

I want 60... But not to drive around all day at top speed... Just need a nice cruising speed of 35 to 40 without working the motor hard. I have a 50 minute drive to our cabin at 30mph... B nice to do it in 30 minutes lol.

Imho 60 isn't really performance boat speed and I agree it's not a performance boat... But that doesn't mean it can't be fun to drive

goodboy

That's what I want to hear!

But what do you mean by "big hook"?

goodboy

A 5.7 was an option...

I agree that you can't just throw hp at it without thought... That's why I'm here asking for your guys opinion on the hull design.

I'm well aware of the difficulties operating a overpowered boat. I can live with moderate chine walk. I don't spend allot of time driving my boat at wot. With the opinions I've gotten so far and looking at performance boat hulls I think it should do 60 without to much trouble. I am going to add trim tabs... Hopefully they will help

goodboy

Ya know it's funny...

When I was first started thinking about re-powering I thought about trying to get another 50hp and 5mph out of the 4.3 (almost impossible I might add)

Then it was 100 hp and 10 mph from a 5.7...

Now I'm at adding 150 hp from a 383 stroker and hopefully 15 mph...

This is addicting haaaha

vi6fan

If you have a .43 with a 4 barrel @205 hp you can achieve 55 mph with a 23p( ballistic) prop and some fine tuning.
If your going to beef up the 383 you might want to invest into a Brovo outdrive . Your virtually going to double the HP.
The alpha outdrive will not last long.

goodboy

I agree... But I'm shooting for another 150 crankshaft hp which should put me at 320-330 prop hp and not quite double the hp... Keep hearing that it will survive if treated nicely and serviced regularly..

Baja Rooster

iTrader: (1)

Every time I read this title I ask myself, "How much money do you have?" Lol.

I have no practical experience on the matter, but the folks getting good results with bigger power on a stock drive attribute it to lots and lots of cooling water over the drive. Spikes of jumping waves and hard holeshots are brutal, but a lot of failures happen in flat water with long runs. It's just a constant load with no relief.

goodboy

I agree... Drive shower and I'm thinking sei drive (re-gearing will almost cost more)

with my build I'm shooting for 350 crankshaft hp... That should put me just over 300 prop hp. Alpha one is rated at 300 max prop hp so although I'm adding allot of torque with the stroker and proly 20-30 hp... I'm feeling pretty confident that it'll survive lol

My budget is 7 grand...and I don't have much money... Can I borrow some?

SB

iTrader: (1)

If your worried about breaking an Alfalfa with a 350hp 383,build a 350hp 350.