Water injection

tootalltechie created the topic: Water injection

Can someone explain the befits of water injection in the exhaust header?

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MATHO replied the topic: Water injection

keeps noise down, obviously better fill of combustion chamber if proper made (nozzle leads to the correct amount of water), no burning of rubber or plastic or teflon connector tubes between header and pipe, temp of engine compartment will be less than dry driven, so the carb air will be a bit cooler......
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tootalltechie replied the topic: Re:Water injection

Does it have any effect on hp and torque?

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MATHO replied the topic: Re:Water injection

less air-temp for carb = bit more fill = bit more torque = bit more hp
less temp in exhaust = better refill by pipe = bit more torque.......

BUT: I do not know who ever has prooven this by dyno measurements, my thoughts came from practical experiences and subjective feelings ( I would never build a boat w/o water injection)
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BIGJACK9170 replied the topic: Re:Water injection

I think he's asking about water injection for pulling bigger props like running saw .
Is that what your asking about ?
Or are you asking about water cooled flange pipes etc ?


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#25363

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tootalltechie replied the topic: Re:Water injection

I started the gas boat hobby with a whh exhaust water injection tuned pipe. I changed to a dry pipe and noticed the difference, a drop in performance.
I'm thinking of going back to water injection pipe. But different engine, pipe, setup.
Doing research first though.

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#25367

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dwr9 replied the topic: Re:Water injection

I would guess you didn't have the dry pipe adjusted to the correct length. A dry pipe will need to be set longer than a wet pipe. I would expect better performance from a well set up dry pipe than from a WHH wet pipe. Doug
#25368

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tootalltechie replied the topic: Re:Water injection

Thanks to Daniel's 1" pipe package I think I have a great dry pipe.

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tootalltechie replied the topic: Re:Water injection

But my research on 2 cycle pwc water injection in the exhaust improves the performance.

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BIGJACK9170 replied the topic: Re:Water injection

You have a great pipe
One of the best out there
You can try anything but it's all been done and like I said you've got a great pipe . I'd say top 3 made if not top 2 lol



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