992 Round Nose
- Thread starter Bonzia Bob
- Start date
- Location
- Cheney lake Kansas
is it done yet??
is Brian holding you up>
Really like what you did with the tuning forks !!
is Brian holding you up>
Really like what you did with the tuning forks !!
wide open
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oke:After reading everything we could find on building expansion chambers over the years, we finally said piss on it an decided to just wing it. It is either going to work like a champ, or totally suck :biggthumpup: either way, we had fun building it...
And if it doesn't work, we can always find other uses for it...
skinnyman
YOU CANT RENT MY SKI
- Location
- Dallas/ToyBox
OLLY:laugh2:
Nope, we are done with that rusted up POS. The main thing we wanted was to have a stock fuel tank, the 992 uses just a little fuel, cart tanks give you about 15 minutes of ride time, and that just sucks.
I am wondering if the blunt cone on the end (versus a longer, more tapered cone to closer match the diffuser cone) will give you troubles. I don't know much about two stroke exhaust desing but looking at other pipes built by those who do there seems to be a trend in a longer convergent cone.
Either with the sound waves returning to soon (or to strong?) and pushing the mixture back out of the cylinder or the signal being to week and not providing enough pressure back into the ports.
Either with the sound waves returning to soon (or to strong?) and pushing the mixture back out of the cylinder or the signal being to week and not providing enough pressure back into the ports.
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We could have made it longer and more cone shaped, but that would mean using a cart tank, and that's not going to happen.
Makes sense, I am curious, if the performance is poor will you live with it for more run time, modify the pipe and run a small tank or modify the pipe to a different design to work with the stock tank? I can get the specs of the stock exhaust chamber if you are interested in replicating that (obviously modified to fit around your tank).
We will have to tune the pipe in once it is all installed and running, we can adjust the stinger length if need be and also the amount of water we are feeding it. After buying pipe building software and playing around with that for a while, we actually came pretty close to our planned pipe. It was pretty late when we finished up last night, I'm going to see if I can do some work on the end there, I just don't like it either.
Something to this effect, if I have the room...
