Nitrous on 454 mpi mag
 

Has anyone had real experience with running a wet kit of only 100hp? Thoughts are prop the boat for 5000rpm, but up the rev limiter 5500-5600. The extra rpms should gain 5-6 mph. Looking for input from knowledgeable guys who are familiar with Nitrous.

I'm familiar with nitrous. Don't see its effectiveness on a boat. The bottle doesn't last that long anyhow. Blowers and turbos are much better because you don't need to refill them. Every time you hit the button you lose pressure losing power. After about 3 passes down the track it was obvious pressure loss and even the bottle heater didn't make it back up.

I agree, but I'm very limited for space in front of the engine. I should probably just build a mild 540cid and leave mine alone

Build a nice stout reliable motor and go enjoy it. Lol

Nanonitrous.com fixed the pressure problem.

Had a buddy several years ago ran a small nitrous on his pleasure boat. You're about right on calculations, he would pull about 5-6 mph on the button.
However, he called it "motor cocaine", because once he got used to it, he pushed the button a LOT. It was never wide open that he didn't hit the button and feel the surge. Motor wasn't a Nitrous motor (stocker- no floating wristpins, etc.) so it wasn't with us long.

After the 12-step program, he was finally free of demon nitrous. He then built a better motor that got him the speed he wanted and did NOT do nitrous again, and lived happily ever after.

I think the pressure issue could be resolved by running twin bottles in a "Y" and using bottle heaters. That's what I always ran on my street cars. Although, with the bottles in the engine compartment on a hot summer day, I doubt you will need the heaters much. I will say I have never been a fan of wet kits on EFI motors where you are spraying the nitrous and fuel in before the throttle body. I have seen bad things happen when fuel puddles in the intake, BIG BOOM!! On all my EFI mustangs, if I was running a shot of 150 or less, I ran a dry set up that had a solenoid that went to the Fuel Pressure Regulator and closed it when the system was engaged. This ramped up the fuel pressure so you got the extra fuel you need through the injectors. I'm not sure if this would work on the Merc EFI, but it might be worth looking into. Anything over a 150 shot, and I went ahead and plumbed a direct port fogger set up with a separate fuel system.

I think a nitrous set up on a boat would be pretty cool, and have thought about it myself many times. The only downfall to me is like other have said, the bottle runs out. In all my street cars it wasn't an issue because I had a filling station in my garage, or if I was out and about, I knew multiple places around the city that I could get a refill. That's not the case on the lake. So you would have to bring multiple bottles with you every weekend, because like it was previously stated, its VERY addicting!!!! It was nothing for me to go through 2 bottles a weekend just cruising around the streets in the summer. That's why the license plate on my car was "N2OJNKY" (nitrous junky). LOL

Only hardcore racers use nitrous oxide systems!

One thing not addressed is CG approval for those that care and fire hazard.

With meth injection.............:grinser010:

With 40psi boost :)

Personally I think the hull would be the determining factor. 38 V bottom??? The problem I had was when I got caught for revenge day with empty tanks. Not cool..... plus a couple minutes wot isn't no where near enough especially when you keep pushing someone out further into rougher water.

If you want a drag boat, buy a drag boat.

if you want an offshore boat to go x mph at 5500 rpm, build it to do that. If you build it correctly to do that, it will. if you dont , it wont. If your using nos to make it do something its not built to do, eventually you end up with pieces instead of parts.

Nos has a place at the dragstrip or in little Jimmie's honda car with the coffee can full of bumble bees exhaust so he can make it from traffic light to traffic light in under 10 minutes,

turbo,nitro motor is the only way to go.

Pieces are what I eventually ended up with. Had some unrecognizable parts during tear down. Mostly my own fault cause I was young and held the button to long. Even though I thought I had enough fuel to compensate it was obvious I didn't. A couple of spark plugs were burned right down to a few threads and piston came completely apart and transferred from side to side making a complete mess out things. That's when I met Valako and decided to make power other ways. Wish I still had the pics of that disaster but that was back in the 36 mm days.

"Nitrous does not blow up engines, people blow up engines!"
http://www.hotrod.com/articles/engin...-305-take-nos/


That being said, if you try to get by without setting the motor up right, or try pushing how much timing you can run or how far you can lean it out, nitrous will ruin parts very quickly......

Also, the only time you see nitrous explosions is generally when something in the valve train breaks.... And in drag racing, it is usually because people can't do a burnout and bang the motor off the rev limiter. Just watched a guy do the exact same thing the other weekend and the whole car almost went up in fire. The other cause of failure is a stuck solenoid from getting junk in the tanks and not being properly filtered.

sometimes,,just some times the converter breaks and loads the motor down too much,you pop a headgasket and the explosion goes up the other cylinder and almost blows your scoop off,all at the 1000' mark.not that I know anything about that.:D

I agree. I don’t really see the benefit of nitrous in a boat. A car or truck that’s a different story