Supercharger For 350 MAG

NOS would not be the way to go, IMO. I don't think these engines are built to withstand the sudden shock of Hp from nitrous on a consistent basis. the power from the supercharger is gradual.

I'm only at JBM for the winter, as I'm moored at a community park during the summer. I do know the manager at JBM, and they are making many improvements to the facilities. If I recall, a boat your size runs about $900 - $1000 for the summer (with discounts at the gas dock, water, elec., cable, discount at the Beach Grill, and use of the pool at the Jefferson Yacht Club). From here, you are fairly centrally located (as you know).
 
You may be right on the NOS. I really want the procharger anyhow. That would make my boat one sweet deckboat! I am sure I will hit 70 MPH after doing some quick calculations. Everything I am reading says that I will reduce my fuel comsumption at cruise as well. Maybe that's the best way to sell it to the wife....I am saving money in the long-run (yea right). As long as I can keep the total cost under $7000 then I am all in. Any more than that and I don't think it would be worth it. Maybe I would opt for the Corsa through-hull system and pick-up 10-20 HP.

ghuskin said:
NOS would not be the way to go, IMO. I don't think these engines are built to withstand the sudden shock of Hp from nitrous on a consistent basis. the power from the supercharger is gradual.

I'm only at JBM for the winter, as I'm moored at a community park during the summer. I do know the manager at JBM, and they are making many improvements to the facilities. If I recall, a boat your size runs about $900 - $1000 for the summer (with discounts at the gas dock, water, elec., cable, discount at the Beach Grill, and use of the pool at the Jefferson Yacht Club). From here, you are fairly centrally located (as you know).
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Here’s the way I see it: Your currant wot of say 5000rpm at 50mph is going to be relative to your cruising speed and cruising rpm.

You add a blower, prop or regear it for a wot of 70mph @ said 5000rpm and you’ll have a new cruising speed @ said cruising rpm. If you try to cruise at your boats original cruising speed your engine may be dogging out, not circulating enough water, …

Since your not going to be doing 70 mph very much: perhaps building a set of heads that can handle say 6500rpm. Leave gearing alone, bring in the blower in the upper rpm range and keep the cruise ability of the boat.

I know 6500 sounds like a lot, but as a gear head you know sb chevs love to rev., and that bottom end is capable of more that 5k. Its comes down to what’s worse: >family cruising at a high rate of speed >dogging the engine down to a nice family cruise speed >turning a few more revs.

I personally think leaving it be would be best. Take the kids out tubing, wake boarding, the wife out for a nice trouble free day on the boat. Just my .02 …Ron
 
I am not sure this qualifies as a "sleeper" mod. Anyone hearing the whine of the supercharger will know what he/she is up against! Go for it - a supercharger has very little effect on fuel consumption or engine/drive life until you use it. Use it rarely and you will have a reliable boat that can fly whenever you make the purchase decision on the fuel and engine life cost of getting on boost.
 
The whine should not come into play much until you put the hammer down. Besides, the type of boats that I am talking about typically have captains call & big block motors. Not sure they can hear anything over their own noise :)

Where we are, there are a lot of 'rude' boaters. The go-fasters especially like to pick on smaller and slower boats. Say you are coming out of a channel where it's a no wake zone. You, being in front have the right-of-way. So this guy behind you in his 32' Fountain is just itching to put the hammer down and blow by you. So he decides that now is the time and off he goes, leaving a nice big wake that makes it so you can't even get up on plane until it calms down a bit. As he does this, the noise from his twin 502's is so loud that you now can't hear yourself think.

Now, how could this situation have be different with a procharger? As this hotshot decides to put the hammer down, so do you. The ROAR from his 502's is so loud that he can't even hear the 8 psi building up in you lil ole 350 MAG. Before he knows it, you are up on plane and off to the races. He darts to the right to try and pass, but can't seem to gain even an inch on you. How can this be? Finally, he backs off, pride hurting from a very embarrassing loss to a 'deckboat'. HAHAHA

Now the real questions is: 'How much is all this worth and are you (or I) willing to pay for it'?

springer3 said:
I am not sure this qualifies as a "sleeper" mod. Anyone hearing the whine of the supercharger will know what he/she is up against! Go for it - a supercharger has very little effect on fuel consumption or engine/drive life until you use it. Use it rarely and you will have a reliable boat that can fly whenever you make the purchase decision on the fuel and engine life cost of getting on boost.
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Ron - my common sense tells me that you are right. 50 MPH should be enough for anyone who buys a deck boat. My issue here is that I am an Engineer and by nature want to make things bigger, better and FASTER. So I have an internal battle going on in my mind. Maybe the cost of this mod will kill my need to 'improve'. Only time will tell.

Besides, we all must have something to dream about right? And if $8K keeps me from upgrading to a bigger (and much more expensive) Searay than it may actually be a cost 'savings'. Well, that's my story and I am stickin-to it :) Thanks for your advice!

BonBini said:
Here’s the way I see it: Your currant wot of say 5000rpm at 50mph is going to be relative to your cruising speed and cruising rpm.

You add a blower, prop or regear it for a wot of 70mph @ said 5000rpm and you’ll have a new cruising speed @ said cruising rpm. If you try to cruise at your boats original cruising speed your engine may be dogging out, not circulating enough water, …

Since your not going to be doing 70 mph very much: perhaps building a set of heads that can handle say 6500rpm. Leave gearing alone, bring in the blower in the upper rpm range and keep the cruise ability of the boat.

I know 6500 sounds like a lot, but as a gear head you know sb chevs love to rev., and that bottom end is capable of more that 5k. Its comes down to what’s worse: >family cruising at a high rate of speed >dogging the engine down to a nice family cruise speed >turning a few more revs.

I personally think leaving it be would be best. Take the kids out tubing, wake boarding, the wife out for a nice trouble free day on the boat. Just my .02 …Ron
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It's a tough sell, but I think I can do it :)

I bet you could push that 305 up to 350 HP or so. That sure would move you along out there :) Is it spring yet?

ghuskin said:
way to go. Now to convince the Admiral!!

I wonder how that procharger would work on a 305 pushing 228hp??? Hmmmm
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might be able to hit 55! woohoo! The procharger mod would cost more than I paid for the boat. :(

At an additional $8k, I think I would move to an older 300WE (74-81. I know, the 80/81 is a 310 Vanguard). I looked at one last fall with twin 454's/inboards. she's a 40+ boat (at 10,000 lbs.) and gets on plane quickly (much faster than mine). Rides nice, handles like a sport boat, guzzles fuel, and contributes to global warming, er, climate change, on a much bigger scale!! Oh, and room to spend a few nights/weekends on, and/or entertain comfortably. But that's just me...
 
SurfinJoe: sorry... the "99" 30th #1002.

You could always slap the blower on your tow vehicle. Ya never know when you might be pullin a bigger boat home. One with a kitchen sink and all that goes with it. ...Ron
 
Damn Ron, that's one sweet bird! I used to have a 2000 SS. She was metallic blue, M6, black leather, but not a pop-top! Very sweet indeed. You have a keeper there! You sound like a man after my own heart!

It's funny that you mention slapping a blower on something other than my boat. I have a 04 GTO (also with a 5.7). I love my car, but it also needs more HP. I am torn between my car and my boat at this point. The procharger for my GTO brings it to 495 RWHP. According to GM High Performance magazine, she will run high 11's. Now that is sweet! Who knows, maybe I will hit the lotto and buy both :) Do you suppose that they will give me a discount if I buy 2?

BonBini said:
SurfinJoe: sorry... the "99" 30th #1002.

You could always slap the blower on your tow vehicle. Ya never know when you might be pullin a bigger boat home. One with a kitchen sink and all that goes with it. ...Ron
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surfinjoe said:
Ok, so I am a gear-head and I just can't leave well-enough alone. I love my boat, but who couldn't use more power....right? So I did some thinking and am considering adding a supercharger to my 350 MAG. Procharger has a marine system for a 350 MAG that gives you 150-200 hp increase. Understanding that I would need to re-prop my boat, I am looking for some feedback on this idea.

My boat currently will run around 50 MPH. Not bad for a family boat, but not enough for me. I know that the hull was not designed to run at 80 mph, but heck, if a bass boat can then why not me. I just think it would be very cool to have a 'sleeper' of a boat like this. And it may just keep me from upgrading to something bigger. I would love to be able to out-run a jet-ski or some go-fast A-hole who is thinking about putting the hammer down and teaching me a lesson.
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If you are really serious about a Sleeper that will Blow Your GO FAST Buddies out of the water....pull the 350 MAG, put it in the garage and implant one of these Bad Mo Fos in it's place...just be sure to install a Kill Switch Lanyard.:thumbsup:

Try 540 Lb Ft of TQ from 3000~5000 RPM:wow:

http://www.marinepowerusa.com/Products/PDF's/2009_6200_LSA_MarineBase.pdf
 
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Now that's a bad mamma jamma! Sign me up! Wouldn't that be sweet. I would need to change out the B3 for a B1! Out of my price range 4 sure, but we can dream, can't we?

sprink56 said:
If you are really serious about a Sleeper that will Blow Your GO FAST Buddies out of the water....pull the 350 MAG, put it in the garage and implant one of these Bad Mo Fos in it's place...just be sure to install a Kill Switch Lanyard.:thumbsup:

Try 540 Lb Ft of TQ from 3000~5000 RPM:wow:

http://www.marinepowerusa.com/Products/PDF's/2009_6200_LSA_MarineBase.pdf
Click to expand...
 
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