Tuned performance pipe for Spree...

Post by **noiseguy** » Mon Jun 19, 2006 8:07 pm

The lengths HAVE to be right or it won't work. What you see is what you get there. I've revised the design for better ground clearance; the pipe sticks out at a slight angle outward but the ground clearance is much better.

kurremkarm · Post by **kurremkarm** » Mon Jun 19, 2006 10:06 pm

Kewl. BTW i sent that pipe to you and i want one of them. So hook me up!

I figure a new pipe is gonna run 75-100 bucks so why not get one that will make me faster?

Let me know and we can do something with the paypal. Also, someone was talking about making holes in the airbox, is that the thing with the fan they are talking about or are they talking about the other thing on the other side? I noticed that the plastic grill by ur fan i missing a piece does that help airflow or just an accident?

darat · Post by **darat** » Tue Jun 20, 2006 1:57 pm

yeah anyways how is the pipes going for you

fulltilt · Post by **fulltilt** » Tue Jun 20, 2006 10:46 pm

Hey Noise, will you sell me a pipe without a downpipe? I've got a welder.

darat · Post by **darat** » Wed Jun 21, 2006 11:38 am

i dont think he does just that.

fulltilt · Post by **fulltilt** » Sat Jun 24, 2006 1:26 pm

Noise, are the pipes you are making the same diameter as the picture you have on this thread? I purchased the one from the Ebay auction link you sent me. It's no bigger in diameter than the stock muffler, in fact maybe smaller. It is an expansion chamber, but not much of one. I brought it out in front of the fan shroud and straight back. The whole set up is cantilevered from the exhaust flange. Pretty hokey, but I just threw it on when I got home last night (the muffler had just arrived) just to see what it did for me. Much louder, and much less bottom end, but it seems to hold my top speed of 37 now after I come down a slight grade. Before, the wind resistance would slow me right down to 34 or so. Again, these numbers are all +/- 1 mph. Waiting for my 68 jet to arrive and I will try my K&N again. After that I'm done modifying this thing. Then I will probably put it all back to stock and try to sell the thing on Ebay. It's going to cost me nearly $200 just to put it on the street legally.

Post by **noiseguy** » Sat Jun 24, 2006 3:30 pm

There isn't much to an expansion chamber. Just some metal cones welded together of the correct length.

If you pull apart a Spree muffler, it's interior is packed with 'glass and has some rear chambers. All that is for reduced noise to meet DOT standards; if you're willing to live with the noise you can do better.

I'd like to see a pic of the results of what you did. Email it to me if you can't host it.

darat · Post by **darat** » Sat Jun 24, 2006 11:21 pm

so there is glass in the spree pipe?

berreta22 · Post by **berreta22** » Sun Jun 25, 2006 12:10 am

well yes darat otherwise every dang cop that was in a 50 mile radius would be on your *

darat · Post by **darat** » Mon Jun 26, 2006 12:47 am

oh well like they say s*** happends.

fulltilt · Post by **fulltilt** » Mon Jun 26, 2006 8:49 am

Like I said, it's pretty crude.

http://www.teamverploegen.com/Moped.htm

Post by **noiseguy** » Mon Jun 26, 2006 11:33 am

Woah.

A few things on that:

1) Pipe lengths are all wrong; use the original downpipe for the length. This isn't a 4-stroke, so pipe lengths are critical. I built one like this, it ran like crap.

2) That unsupported pipe will either break at a weld (interesting, happened to me) or break the exhaust port off the head (very bad.)

I thought about running the pipe high like that, but was concerned about the side panels fitting and/or burning a leg. The newest version of the pipe wraps around a lot closer to the shroud on the bottom, so the ground clearance problem over bumps has been eliminated.

The new pipe, as a bolt-on mod, brought an unmodded '85 Spree up to 35 MPH top speed from 28-29 or so without the mod. I tried running this with a pulley mod, it actually hurt top speed.

berreta22 · Post by **berreta22** » Mon Jun 26, 2006 6:05 pm

I think the pipe needs to be about 5ft longer. What you think? lol

Spreewell · Post by **Spreewell** » Mon Jun 26, 2006 6:35 pm

Weld a Foldgers can on the back, that will get ya an extra 5 on top hardcoreareastyle.

fulltilt · Post by **fulltilt** » Mon Jun 26, 2006 7:57 pm

I'm not worried about the breaking part, I won't run it this way for very long. So more length will help, huh? Do you have a picture of your latest with this expansion chamber? Do you think this negates the pulley mod?