Post by stepthrutuner on May 26, 2010 8:55:23 GMT -5
I say keep exh. exit diam. on the small side and keep a gradual out-taper to a mild initial diffuser angle. Pipe wrapping could help a bit. Got to keep that pulse energy high to make a pipe 'work'. Headpipe building is by far the most challenging task in constructing pipes.
Gotta get a new reed cage. That's in the Venus. Still need to make a cylinder spacer. I'm probably forgetting something else. I'll get back to it after the Sunl is together again I hope. Was gonna work on one today or tonight, but I've been busy watermarking pics.
Last Edit: Jun 1, 2010 19:58:13 GMT -5 by 90GTVert
No news. I haven't touched it. Belt troubles with 2 scooters and getting ready to start working on my Mustang have got me pretty broke. Since I know I don't wanna spend the money to get the stuff it needs to run, I just haven't touched it. Essentially I have 5 projects (4 scooters and a car) and I can't really keep up with them all too well. I might be better off to sell a couple of scooters sometime. I thought having 4 scoots would mean I'd have 'em around for friends to ride and stuff. It turns out that it gets to be too much money for my budget to keep them all running well and tinker with different things. I could stop tinkering, but them I would be bored with them so ...
I decided to finally open up the ZX like I said I'd do some time ago. As you can see here, it's about 21mm at the header because of this gasket holder. I'm going to remove it and use flat gaskets instead. A bit more of a pain to install, but it'll open the header up quite a bit.
After trying to chisel out the piece, I discovered it was welded all the way around and chiseling it out wasn't a good option. I cut the flange off and worked on it that way instead. Here's the pipe side. What was left there popped out easily.
Here's the mess I made of the flange side with a chisel.
I ground that out and ended up with a 26mm flange, up 5mm from before.
I decided not to weld it back together until I match up the cylinder. This pic illustarates why that's a good idea in this case.
Last Edit: Aug 14, 2017 13:55:04 GMT -5 by 90GTVert
I actually think if I elongate the slot for the bolt on the right side of that pic, and probably grind that weld beside it for the shield just a little, it will fit way better. I wouldn't mind a 1/4" flange so it's sturdier, and this one is cracked, but I dunno if I'll do it. By the time I buy 1/4" steel and 1" tubing, I dunno if it'll be worth the money and effort with my metal tools. I'm guessing it would end up being about $30 in materials, prob plus shipping for the tubing casue I can't get that local. Only thing I might be able to get loacl would be 1" schedule 40 metal tubing, but that's actually 27.6mm ID according to specs I've seen.
If you slot the flange holes,tack a washer on with it aligned on the port,that way it'll always be lined up Tubing is EVERYWHERE!,go saw a leg off the lawn chair,swing set,mower handle,etc.EMT conduit is a possibility too,carry those calipers with you to the hardware store!