Water Injecting at Stinger to Reduce Noise....

[Blackout]

Has anyone tried injecting water at the stinger to reduce noise? Does it affect the tune of the pipe? Any tech would be helpful. Thanks!

 

[D-7]

I´m using water in muffler many years - working perfect(reduce the high frequencies), the pic is my 7,5 Mono, with 2.5mm drill for water injection.

 

[Steven Bryant]

Hi Frank what pipe is that you are using as i have a several of them but have never got arount to using them. Are them any good?

 

[D-7]

7,5 ccm russian inox pipe, the have perfect speed band and extremly light

 

[Samuel Hagan JR]

Do you worry about water getting into your fuel pressure line? How do you set that up. That's really neat.

 

[Steven Bryant]

Thanks Frank

 

[moparbarn]

Do you worry about water getting into your fuel pressure line? How do you set that up. That's really neat.

that is a quiet pipe. the can the water is plumbed to is the muffler section. the pipe pressure fitting is in the actual tuned pipe. you can't see the rear cone or stinger, it is inside the rear can you see. you can also plumb water into the header. the expanding steam changes the volume of the pipe. mercury "stacker" full scale inline 6 ob's used to do this back in the 60's. you could tell when they opened up the water injection, it did change the sound (but not much) not sure if it would work in our application, or be worth the effort...........but it was effective on the bell megaphone pipes they ran. you wanna talk about noise!!!!!!!!i lived about 7 miles from a race site on biscayne bay in miami. i could hear them running at the house. about 4 miles water, rest residential.

 

[Samuel Hagan JR]

Do you worry about water getting into your fuel pressure line? How do you set that up. That's really neat.

that is a quiet pipe. the can the water is plumbed to is the muffler section. the pipe pressure fitting is in the actual tuned pipe. you can't see the rear cone or stinger, it is inside the rear can you see. you can also plumb water into the header. the expanding steam changes the volume of the pipe. mercury "stacker" full scale inline 6 ob's used to do this back in the 60's. you could tell when they opened up the water injection, it did change the sound (but not much) not sure if it would work in our application, or be worth the effort...........but it was effective on the bell megaphone pipes they ran. you wanna talk about noise!!!!!!!!i lived about 7 miles from a race site on biscayne bay in miami. i could hear them running at the house. about 4 miles water, rest residential.

Do you have to buy a pipe that's made for that or can you modify a pipe for that? I just bought a CMB quite pipe and wanted to play around with it.

 

[moparbarn]

add a pressure fitting to the rear/muffler section for the water.

 

[toyotatruckin]

I had a custom t-mod muffler built with water injection in the end of it to quiet it down--worked perfect and got my boat below the DB needed for IMPBA---Might add that was the only thing that brought the noise down---cooper mushroom didnt do any good i even tried a deflector to shoot the noise away from the meter (that and cutting throttle helped lol)

 

[Kez]

I had a custom t-mod muffler built with water injection in the end of it to quiet it down--worked perfect and got my boat below the DB needed for IMPBA---Might add that was the only thing that brought the noise down---cooper mushroom didnt do any good i even tried a deflector to shoot the noise away from the meter (that and cutting throttle helped lol)

Can you post a picture of your T-mod muffler?

 

[toyotatruckin]

I dont have the boat anymore and I just looked through my main photobucket account and cant find a picture---BUT its simple only thing special mike did to the muffler was make an extended tip on it to mount a water fitting to---the water was supplied from the exit side of the cooling system so instead of the water going out the side the exit hole was just moved back to the muffler --

 

[Andy Greene]

I like the idea Mike, but my concern would be not being able to see positive water exit from the boat to know it was cooling. Can you see the water coming from the pipe exit ?? esp with a rich needle

 

[Samuel Hagan JR]

add a pressure fitting to the rear/muffler section for the water.

Okay. My next question would be, how much water do you allow in the pipe? I'm going to try this on the CMB quite pipe I ordered from stu.

 

[Kez]

Anyone recognize this muffler? I bought it earlier this year in the for sale forum from an IW member. I was told it was a CC racing muffler, The muffler is designed for water injection. I am going to try this in my Sport 40 and will report on the effectiveness of muffling exhaust noise.

 

[Terry Keeley]

I had a custom t-mod muffler built with water injection in the end of it to quiet it down--worked perfect and got my boat below the DB needed for IMPBA---Might add that was the only thing that brought the noise down---cooper mushroom didnt do any good i even tried a deflector to shoot the noise away from the meter (that and cutting throttle helped lol)

Can you post a picture of your T-mod muffler?

http://www.jrcbd.com/showthread.php?t=20135&highlight=cheater

 

[toyotatruckin]

Im still hunting for a picture of mine but the link above is what you need-great person to deal with!

Here -it was on this cracker --sorry closest I could come up with

 

[Samuel Hagan JR]

I just got my CMB Quite pipe and do you guys have any suggestions on where to place the pressure fitting and water fitting?

 

[Samuel Hagan JR]

Also how long are you guys running those type of pipes?

 

[Blackout]

Thanks for all the input guys! I'll let you know what I find out.

Samuel, not sure where I'm gonna put the fitting yet on my CMB Quiet pipe. Somewhere in the last muffler chamber I suppose. Seems to be 2 muffler chambers on these pipes. I have to look at it further with a flash light shining inside....