stock pipe

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targa20

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just wondering what the big advantage to the viper triple pipes are. is it the manifold that is restricting? would there be any advantage other than weight to gutting a stock pipe? anybody tried this. thanks
 

There's nothing in a stock pipe to gut out. Do you mean the muffler, if so, don't do that either.

What are you wanting from your Viper? Fast Trail, radar/speed runs?
 
no I was just curious, "if it was a flow issue" why not open the stock pipe up. I don't have pipes on mine. I would like to but I already cant hook up so I figured piping it would be a waste. was more curious why pipes wake these sled up so much.
 
It's an honest 25hp depending on the pipes you choose. You'll feel it believe me. Totally different sled. With pipes though comes clutching, jetting, suspension setup, gearing etc...if you can get all of these things to work together you'll have one badass trail ripper. Three into one single pipe setup is very restricted. My opinion is every triple sled with single pipe is a wild beast waiting to be unleashed!
 
Allot of it has to do with then "shockwave" the expansion chamber reflects back to the cylinder. In a 3-1 set up, you don't get a clean shockwave because the harmonics kinda cancel out(as one is heading away from the cylinder another is headed back, they meet and interrupt each other) triple pipes harness this pressure wave a lot better allowing loop scavenging to work more efficiently .
 
I've read a few articles on exhaust theory, but I still don't understand why there is such a large increase in fuel usage going to a pipe per cylinder from the stock 3-1. Do they just need to be ran that much richer from stock?
 
To simulate one aspect of the viper triples, drill a 1/8 in hole in your gas tank, now go for a ride. This will simulate the fuel mileage you will get
 
Yzed608 said:
I've read a few articles on exhaust theory, but I still don't understand why there is such a large increase in fuel usage going to a pipe per cylinder from the stock 3-1. Do they just need to be ran that much richer from stock?
Click to expand...

it has to do with each cylinder is moving more air when you go to a pipe per cylinder, an engine is nothing more then a air pump. Has to do with the design of the pipe as to what kind of jetting it require, some pipes like the stock yamaha srx for example will use a small 40-42.5 pilot jet, the aftermarket pipes that give more hp output by design require a 47.5-52.5 pilot jet. The main jets also go accordingly to the pipes design as to what rpm it runs at and what the ign. timing is at that rpm in which they desire to reach peak hp. The rpm is dictated by the pipes length.

To sum it all up a viper with aftermarket pipes will get about 8-9mpg with good clutching, stock they will get 12-13mpg. They use the majority of fuel thru the use of the large pilot jets required by the triple pipes, thats where you use 75% of your gas in the low to mid section of the trottle on a trail sled. The aftermarket pipes add a good 20-30hp to the engine which is a HUGE increase in power, but it will be thristy at the fuel station so if you wanna play... you gotta pay......
 
thanks for the reply. I just had my pipe off to replace some broken motor mounts and was wondering if it was the pipe that was so restricting or the manifold. I now installed the srx torque arm. my viper is a 144 x 2 and I already went to a 20t top gear and have watched the proaction video to try to set my skid up but it just spins like crazy. I didn't think pipes would help my traction issue. this thing is already a pig on fuel without pipes, couldn't imagine it could get much worse.
 
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