Aero, exhausted

scooterwerx · Post by **scooterwerx** » Fri Jan 16, 2009 2:12 pm

Well, today the UPS man brought a large box, within was a Leo Vince SP3. Ho-lee-smokes. Gotta get back to work since i wasted all morning installing and tuning!!! Good thing i work for myself or Id be FIRED!!! hahaha Pics and more details later....

Wheelman-111 · Post by **Wheelman-111** » Fri Jan 16, 2009 2:36 pm

Greetings:

Glad you got the pipe.

Sort of...

Actually there's no sense prevaricating about the bush;

I hate you!

So it fits? Could you include the box in your pictures with model numbers, anything searchable?

Thanks,
Guy

steffen707 · Post by **steffen707** » Fri Jan 16, 2009 3:13 pm

I want to see it too. As well as performance comparisson. Do you have a stock pipe now, or is this an upgrade to an upgrade?

scooterwerx · Post by **scooterwerx** » Sat Jan 17, 2009 1:45 am

At first i was underwhelmed by the pipe. The fit and finish isnt the greatest, and you have to grind out a restrictor in the header right off the bat! I guess its to meet legal requirements in Europe...it also rubs the rear tire and had to be shimmed with some washers.
The noise level is barely louder than stock. First i ran it with everything setup as it was. low end power was turd-y, mid range so-so. at about 35 it picked up and pulled hard all the way to 8800 rpm. Leo Vinci includes rollers, so i installed them. I had my polini rollers at 8.7g, these were 6. it revved out to full tilt and went slower than my elite E! I changed the contra spring back to stock, and it is golden. now i have a malossi red contra spring for sale! adjusted the clutch to begin engaging at 4500, and it runs like a raped ape! amazing roll on power, wheelies at 25mph easy. pulls hard all the way from 0 to top speed, havent been able to acccurately measure top speed, but judging from how far the needle goes, id say at least 5mph more top speed, maybe more, due to the fact that it picked up almost 1K rpm. its definetly 60mph plus. throttle response is great, the jetting is very close, im going to pick up a new plug for more testing. its crisp and responsive throughout the rpm range, so its close. I want more now! My next build is going to be elite E with nb/se50 engine, polini kit, etc. I would like to experiment with a real expansion chamber, just gotta find time! Just this mild exhaust made a night and day difference, if you find one of these, get it! its worth it! after shipping I paid a tad over 150, daywot had one a year ago for 175.

Wheelman-111 · Post by **Wheelman-111** » Sat Jan 17, 2009 12:40 pm

Greetings:

Nicely done.!

Post by **noiseguy** » Sun Jan 18, 2009 10:04 am

That thing looks like an expansion chamber, and from the tuning you did it sounds like it's acting like one too. What exactly is inside?

scooterwerx · Post by **scooterwerx** » Mon Jan 19, 2009 12:34 am

it is definitely an expansion chamber, it looks like the baffle cone is hidden inside the muffler can, i dont know if i want to go chopping it up to have a look see inside, it works so good!

Kenny_McCormic · Post by **Kenny_McCormic** » Mon Jan 19, 2009 1:10 am

Explore with a coathanger.

Wheelman-111 · Post by **Wheelman-111** » Mon Jan 19, 2009 2:07 pm

Greetings:

Thanks for making my search for the elusive NB50 Aftermarket pipe a little easier. No need to break out the coat hanger or buy an expensive flexible proctoscope;

http://www.sitogroup.com/servlet/page?_ ... tmp=121988

This is another SP3 pipe for a different application, but the innards should be the same. There's supposed to be a good amount of glass packing, too, so coat-hanger explorations won't work.

steffen707 · Post by **steffen707** » Mon Jan 19, 2009 4:20 pm

scooterwerx wrote: At first i was underwhelmed by the pipe. The fit and finish isnt the greatest, and you have to grind out a restrictor in the header right off the bat! I guess its to meet legal requirements in Europe...it also rubs the rear tire and had to be shimmed with some washers.
The noise level is barely louder than stock. First i ran it with everything setup as it was. low end power was turd-y, mid range so-so. at about 35 it picked up and pulled hard all the way to 8800 rpm. Leo Vinci includes rollers, so i installed them. I had my polini rollers at 8.7g, these were 6. it revved out to full tilt and went slower than my elite E! I changed the contra spring back to stock, and it is golden. now i have a malossi red contra spring for sale! adjusted the clutch to begin engaging at 4500, and it runs like a raped ape! amazing roll on power, wheelies at 25mph easy. pulls hard all the way from 0 to top speed, havent been able to acccurately measure top speed, but judging from how far the needle goes, id say at least 5mph more top speed, maybe more, due to the fact that it picked up almost 1K rpm. its definetly 60mph plus. throttle response is great, the jetting is very close, im going to pick up a new plug for more testing. its crisp and responsive throughout the rpm range, so its close. I want more now! My next build is going to be elite E with nb/se50 engine, polini kit, etc. I would like to experiment with a real expansion chamber, just gotta find time! Just this mild exhaust made a night and day difference, if you find one of these, get it! its worth it! after shipping I paid a tad over 150, daywot had one a year ago for 175.

So did you end up liking the pipe because you tuned the transmission to a different rpm that better suited the exhaust?

scooterwerx · Post by **scooterwerx** » Tue Jan 20, 2009 1:10 am

yes, this pipe kicks *.

steffen707 · Post by **steffen707** » Tue Jan 20, 2009 8:59 am

how does it compare to a PG long or a technigas R?

Those seem to be 2 popular pipes I hear a lot about.

scooterwerx · Post by **scooterwerx** » Tue Jan 20, 2009 11:01 am

i dont know much about those two, this is the only one ive had direct experience with. the PG long seems more like an all out performance pipe, killer top end, with sacrificial bottom end power, for huge stroker motors and such, and the technigas seems like a more all-around pipe, for smaller engine sizes.

from that there picture, wheelman, it looks as if there is no baffle cone in this pipe, it looks like a straight megaphone, all diffuser! how weird...

Wheelman-111 · Post by **Wheelman-111** » Tue Jan 20, 2009 11:30 am

Greetings:

I believe you said you ground out that baffle cone before you even installed that thing!

I still haven't forgiven you for scoring that fine pipe ya know...

scooterwerx · Post by **scooterwerx** » Tue Jan 20, 2009 11:40 am

there was a little restrictor cone, that little devil got 86'ed, the baffle cone is the end section of an expansion chamber, the part of the pipe that generates and sends the pressure wave back to the cylinder to do its thing!

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