How about nitrous?

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twister69z
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How about nitrous?

Postby twister69z » Fri Jul 31, 2015 3:34 pm

Lycoming IO-540-K1G5D stock . With the exception of the injection converted to carburetor.
What % or amount of Nitrus would give a boost of power not radical enough to need a pitch change of the propeller but still get you unstuck from some sticky mud or grass? Not using this for racing just to get a boost when needed. I have abandoned using a add on supercharger,or Turbo. Should I worry about the mixture being too lean for the minute or so I am using the spray? Here is the place to help a fellow airboater learn from previous mistakes or conquests! Please,post here,
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keebo
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Re: How about nitrous?

Postby keebo » Fri Jul 31, 2015 5:16 pm

You can be safe with a 50 shot, just don't abuse it. You won't be holding the bottom for but a few seconds; will be all you need for what you described, be careful though it's addictive and runs out.

You will have a nos selenoid and a fuel selenoid feeding your plate so not to worry about lean, just have to set it up right and you'll be good.

I'll see if I can dig out my set up and plate for an MA4/5 carb and post a pic
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twister69z
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Re: How about nitrous?

Postby twister69z » Fri Jul 31, 2015 10:40 pm

I would appreciate that a lot! Thanks for the reply!
How much did you gain ? And do you think it is at all,harmful?
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If you don't have time to do it right the first time ,
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keebo
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Re: How about nitrous?

Postby keebo » Sat Aug 01, 2015 9:28 am

I'd be guessing on the gains, I would say about 30hp gain plenty enough to give you that little extra oomph in a sticky situation. As far as harmful we have to be real, all power adders can be harmful, with a 50 shot it can last a long time without problems if not abused and the system is maintained. A bad fuel selenoid will give you a lean situation which basically turns your nitrous into a cutting torch on your piston. Not trying to scare you away from it, just giving you information. It can be on there for years used responsible or you can fry it quick.
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HAMMERHEAD
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Re: How about nitrous?

Postby HAMMERHEAD » Sat Aug 01, 2015 8:43 pm

you can use a single fogger system and set it up very easy without having to build a custom plate, just drill and tap. you should use a separate fuel pump and regulator with your system and set the pressure at 6.5 PSI with an accurate fuel guage free flowing back into your tank with a # 73 holley jet in the fuel line for starters, you should be able to run a 100 shot safely on stock components if there are no current unknown damage internals. a good tune for 100 HP is a #52 nitrous jet with a # 48 fuel jet. ALWAYS BUMP YOUR SYSTEM WITH THE BOTTLE OFF TO MAKE SURE THE FUEL SOLENOID IS FUNCTIONING BEFORE RUNNING THE SYSTEM ON THE BOTTLE, THIS WILL ALSO PURGE THE FUEL SYSTEM. the 100 HP tune up is based on a 350 CI Chevrolet, it is probably more like 50 to 75 HP on your 540. A minimum of AV GAS is required and timing should be considered. you should be ok with 26 degrees with good fuel with this tune but if you increase the tune you would need to retard timing. If you are set up to turn around 2900 RPM on motor you should not need to increase pitch if you are just using the system to get out of a sticky situation. GOOD LUCK!


SWAMPHUNTER45
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Re: How about nitrous?

Postby SWAMPHUNTER45 » Sun Aug 02, 2015 9:02 am

Octane, fuel presure and timing are without a doubt critical elements in setting up an NOS.

I suggest you plan to add a seperate arming switch to prevent accidental activation. If you are going to use a driver activated push button then you need to develope a routine to ensure you dont screw up the sequence of events.


STEP 8 requires you to think!


1) verify fuel pressure / purge
2) NOS valve open
3) check engine guages
4) Arming System
5) 360' scan boat and area around you
6) bring engine to full throttle
7) activate NOS
8) release NOS button - before you lift foot off gas
9) close arming circuit
10) post use inspection / close tank valve

twister69z
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Re: How about nitrous?

Postby twister69z » Tue Aug 04, 2015 10:21 am

Thank you for all the replies! I think we are going to " give it a shot!"
The cylinders are fresh Cermanil cylinders should be a good combination for the nitrous shot!
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If you don't have time to do it right the first time ,
Where are you going to get the time to do it a second time?

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keebo
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Re: How about nitrous?

Postby keebo » Thu Aug 20, 2015 6:48 pm

Twister, posted pic in my album pm' you specifics
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stroked470
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Re: How about nitrous?

Postby stroked470 » Thu Aug 20, 2015 8:08 pm

This is one I built. Exactly as Dwayne said
Attachments
image.jpg

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keebo
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Re: How about nitrous?

Postby keebo » Thu Aug 20, 2015 8:27 pm

Looks good
Sure you can Trust our government, just ask an Indian

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stroked470
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Re: How about nitrous?

Postby stroked470 » Thu Aug 20, 2015 8:54 pm

There are more pics in my gallery of it.

twister69z
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Re: How about nitrous?

Postby twister69z » Fri Aug 21, 2015 7:28 am

Thanks!
If you don't have time to do it right the first time ,
Where are you going to get the time to do it a second time?

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air-roberts
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Re: How about nitrous?

Postby air-roberts » Fri Aug 21, 2015 8:14 am

x2 on hammerhead
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