Dutchz Z1 road burner - new stuff

Yes, I made them a few years ago. I turned an allen head bolt down to slip fit into the spool I machined, then welded them together. Came out pretty cool in nickel.

dutchz wrote:

I don't know Mark. Moriwaki makes a pipe that has small collector dia like that, actually I've seen a few high end Jap pipes that appear to have small dia collectors.

Thanks for the encouragement. The cool thing is I have some dyno charts, so we should be able to make a decent comparison!

i didnt know there were modern pipes with small collectors. i never have noticed the size.i guess i amused it would be more obvious? cant wait to here the results.
does someone have a program that they could extract the pipes dimension, from this pic?

No program but I think you can safely assume the headers are close to 1.5", looking at the collector it's not much bigger, I'd say 2"-2.25" maybe.

Look at the V&H collectors. Also the old Lazer pipes. Murray made some small collector headers as well.

dutchz wrote:

No program but I think you can safely assume the headers are close to 1.5", looking at the collector it's not much bigger, I'd say 2"-2.25" maybe.

my Kerker has a collector ID of 2 5/16"(od=2.5"). i have not come across anything smaller as yet, except for a Bassani. it has a double walled collector. the inner collector is 2 1/8"id(3"od outer collector). i dont understand the there behind the design ,it goes against the logic that the megaphone uses.

you are a crafty lil feller now aren't you!
those things are are super sweet.a much cleaner installation than having to weld threaded bungs in the swinger.i love all the cool little details that you have on your bike,you have great vision and kicka$$ execution sir.
keep postin,

leon

Thanks Leon, I don't think I've ever been called that before :huh:

Mark,
Having a reducer right where the primaries merge makes sense, this would keep gas velocity up. The 3" outside pipe is just for looks then and slip fits onto the 3" tail pipe, I suppose. So I could see that as an attempt to boost mid range. A better design would be if there was a tapered transition to the 3" tailpipe from the collector, rather than the (effectively) small collector dumping into a 1" bigger tailpipe.

Is the hole I am seeing inside the collector the end of a primary or is there some kind of baffle plate inside the collector?

I got the Kosman superbike rotors blanchard ground this week. The PO had unfortunately let his race bike sit with the pads on, these trapped some moisture and pitted the cast iron. There is still some pitting left but the rotors should be good enough to run. They cleaned up much better than I thought they would and they only took off .005" a side.
I've got some new NAS bolts and jet nuts, just waiting for the carriers now!

mark1122 wrote:

does someone have a program that they could extract the pipes dimension, from this pic?

I scaled the image based on the assumption that the front and rear wheels are 18" and that makes the part of the collector just behind that little bump about 1.9"

Dutch... Larry turned me onto the site location for the primary tube bullets... Interesting design concept so please share your findings most fefinitely...

Can't wait to see the Dyno results on that mid range...

Thanks and keep them images coming,

OMR

JakeB wrote:

mark1122 wrote:

does someone have a program that they could extract the pipes dimension, from this pic?

I scaled the image based on the assumption that the front and rear wheels are 18" and that makes the part of the collector just behind that little bump about 1.9"

Very interesting.
thanks.

dutchz wrote:

Thanks Leon, I don't think I've ever been called that before :huh:

Mark,
Having a reducer right where the primaries merge makes sense, this would keep gas velocity up. The 3" outside pipe is just for looks then and slip fits onto the 3" tail pipe, I suppose. So I could see that as an attempt to boost mid range. A better design would be if there was a tapered transition to the 3" tailpipe from the collector, rather than the (effectively) small collector dumping into a 1" bigger tailpipe.

Is the hole I am seeing inside the collector the end of a primary or is there some kind of baffle plate inside the collector?

I have never had 1 of these in my hands so i can only speculate. this pic came from 1 of our members who posted it in my header post. that hole it seems to be the primary . it is possible that the outer pipe is just for looks? maybe heat reduction? and i would like to know if the tail end has a dual wall as well. i should have asked at the time ?
It sounds like u may be right on the money at 2".
Your rotors look killer .