105 mph Cmate

[JW]

http://grandrapids.craigslist.org/boa/4439341347.html


Hm. I'd like to see that

 

[2tonchevy]

lol...I like his optimism....but doubtful...

 

[sim]

SLBSTM.
But it sure is pretty anyways.

 

[CheckmateFever]

Could that possibly be a boat sold by Sammy (Viper1)? He's put together some crazy fast Enchanter I/O's back in the day!! I'd just like to see 70 with mine LOL. I talked to a guy years ago on a muslce car forum, believe it or not, that said he once had a brown Enchanter I/O with a built to the hill engine that ran low 100's, so it could be possible, but doubtful this is that particular boat.

 

[Jimway]

Hmmm. 5500 rpm, 1.3 ratio!?, 10% slip, and a 29 pitch prop. It just might be in the realm of possible.

 

[sim]

Hmmm. 5500 rpm, 1.3 ratio!?, 10% slip, and a 29 pitch prop. It just might be in the realm of possible.

Would depend on the tow vehicle.

 

[Jimway]

Have you heard, in my instance, it is now a big block Ford. The Playmate has a heck of a top speed now...

 

[boatman4021]

I could be wrong, but in all of my years building engines and racing them with HOLLEY carbs, I have yet to see a vacuum secondary carb with double accelerator pumps!

Also, how much HP can it make at 5500rpm's? To increase HP, you have to increase rpm's. A built to the hilt 400 will make serious HP, but will have to turn more than 5500 to do it. Just my opinion.

 

[RNGRDVE]

I'm going to guess on motor alone that boat would be low to mid 90's. Add in the nitrous and it sounds possible. Where's Sammie at, he knows how to make this hull run fast.

 

[Gimme Fuel]

That motor sounds scary. 400 shortblock out of a suburban. Most had only two bolt mains. No mention of upgraded pistons, rods, crank. Is that the reason you can't rev it over 5500? Depending on the cam and exhaust, that might be one reverting SOB. I would need a whole lot more details to think highly of it. And putting nitrous to it also? no thank you.

 

[corey331]

i actually really like the idea of running nitrous on a boat. I have thought about it more than once on my 253.

 

[2tonchevy]

i actually really like the idea of running nitrous on a boat. I have thought about it more than once on my 253.

me too...lol

I think you could add up to about 100 shot to a bbc in a boat safely with a wet kit....gotta add fuel with no2

ive done quite a few race/street cars.....but never a boat

 

[Gimme Fuel]

Bad thing about nitrous on a boat is you either run around over propped when off of the spray, or you are under propped and over-revving when you hit the button. also, with the added fuel to compensate, you will run rich while cruising. If it is a lake/river hot rod where speed is its sole purpose, i think NOS would be fun. But on something for mostly pleasure/cruising and with the occasional speed burst, it is better to make the power you want on the motor.

 

[2tonchevy]

Bad thing about nitrous on a boat is you either run around over propped when off of the spray, or you are under propped and over-revving when you hit the button. also, with the added fuel to compensate, you will run rich while cruising. If it is a lake/river hot rod where speed is its sole purpose, i think NOS would be fun. But on something for mostly pleasure/cruising and with the occasional speed burst, it is better to make the power you want on the motor.

I agree...but with a "street" wet kit you have both a fuel and nitrous solenoid per stage....so the engine runs normally when not in use.....another issue is timing....but if timing when on spray is an issue you can install a timing module .....theres always a lil more involved when doing things right....a lot of people running nos don't know what they are doing and it tends to give nos a bad name.....not that isn't hard on a motor...but when used properly it can yield good results

 

[corey331]

Bad thing about nitrous on a boat is you either run around over propped when off of the spray, or you are under propped and over-revving when you hit the button. also, with the added fuel to compensate, you will run rich while cruising. If it is a lake/river hot rod where speed is its sole purpose, i think NOS would be fun. But on something for mostly pleasure/cruising and with the occasional speed burst, it is better to make the power you want on the motor.

I don't think being a little over propped would be that bad. I mean, say to run your motor N/A you need a 30p Bravo. But with the spray a 32 would be ideal. You are not going to have any problem getting the boat on plane, and cruising around with the 32. You just won't get the most out of the motor if you are hammering down and not spraying. But, if you are hammering, you will be spraying!!! And the xtra fuel compensation really only comes into play if you are running a dry kit, and need to use extra fuel through the carb to richen up the mix. I used dry kits like this with great succes on my EFI race car, but I would never try it on a carb'd motor. I'm talking about running a full on fogger set up, complete with its own stand alone fuel system. Not some chincy plate kit. So the motor runs just fine when cruising, but when you need the extra fuel, your second pump kicks on, and gets delivered directly through the ports. I ran a system just like this on my last mustang and it worked out great. And I'm sure you could run a lot more than a 100 shot on a BBC, considering I was running a 250 shot on a little 317ci SBF. The only thing I am having trouble figuring out is bottle placement in the boat. Mostly because, when I would be out with the boat is a hot summer day and I wouldn't want to over heat the bottle and create too much pressure. My first thought was obviously the engine compartment, but then I thought, well crap, that would be all bad if the bottle pressure got too high, and the pressure relief valve let go and realeased some nitrous into the engine compartment while I was just cruising down the lake...... That would not make the motor happy... run lean and melt some pistons.

Mark my words though.... at some point in time I will lift my Hatch and you will see two big white NX bottles mounted in there. And you will love it and want to go for a ride!!! lol

 

[corey331]

I agree...but with a "street" wet kit you have both a fuel and nitrous solenoid per stage....so the engine runs normally when not in use.....another issue is timing....but if timing when on spray is an issue you can install a timing module .....theres always a lil more involved when doing things right....a lot of people running nos don't know what they are doing and it tends to give nos a bad name.....not that isn't hard on a motor...but when used properly it can yield good results

You hit the nail on the head with "used properly". When done right, and tuned correctly, its no worse on the motor than any other form of forced induction.

And when most people see a bottle they think of those stupid ass F&F movies where they lead you to believe that nitrous is a flammable gas that blows up easily, and its called "NAAAWWWZZZZ". Man, I want to punch those people.......

 

[Gimme Fuel]

Glad top hear it is a well thought out NOS system. Yes that can work properly in a boat then. Yea, the bottle venting into engine compartment may make things melt...haha. Could you plumb the pressure relief vent to a thru hull fitting? That would be safe-er. Yea, I love HP so I would like a ride...haha! With new EFI systems, I'm sure nitrous control is easy and reliable....and fun!

I just like making my power on alllll motah! No fun being a one trick wonder when the bottle is empty.

 

[RNGRDVE]

I know Slingblades son is running a Jetmate with nitrous. I could be wrong but if I remember correctly it's a BBF. The bottle is mounted right between the ft seats.

 

[ezstriper]

just hard to prop for NOS as you don't use most of the time...the rest of the time you are overproped...

 

[fast94persuader]

Anyone ever run a solid roller cam in a boat? Sounds like a bad idea. Even mine has a hydraulic roller.