exhaust question

cbxtacy · Post by **cbxtacy** » Wed Jun 11, 2008 11:00 am

I was just looking at my after market exhaust compared to the stock. That includes supertrapp, jardine, D & G, bub, denco. The stock is double wall. You need a certain dia for the collars to fit around. 1 3/8". On the stock head pipe the inside pipe dia is 1 1/8". The aftermarket (except for the Jardine) are 1 3/8 through out. If one were to build an exhaust, would it be better to build it 1 1/8" on the head pipes with a sleeve around the end for to hold the collars? How do breathing characteristics change with larger dia head pipes? I believe it gives more top end at the expense of mid range and bottom end. Is that something you'd want with stock rods?

alimey4u2 · Post by **alimey4u2** » Wed Jun 11, 2008 11:31 am

I think the trick is to keep exhaust gas velocity high but not cause too much restriction...As you know, scavenging is the art & craft of it all. I understand two stroke expansion chamber design but struggle with the nuances of 4 stroke systems

Don #6141 · Post by **Don #6141** » Wed Jun 11, 2008 12:35 pm

I'll bet this one makes the most power

http://www.schuele-maschinenbau.de/page ... ik/cbx.htm#

Good pictures of it on pages 3 and 4

It's a 6 into 3 (with #'s 1 and 6, 2 and 5 and 3 and 4 paired up with equal length tubes) into one . . . . all stainless

If you want to start building up something, stay close to that design and I think you'll be happy. You might actually make a buck too - These are no longer available and are going for ~$3500 when you can find a set

Don

EMS · Post by **EMS** » Wed Jun 11, 2008 12:41 pm

It does. Schuele says it produced 120hp on a dyno an otherwise stock motor.

cbxtacy · Post by **cbxtacy** » Wed Jun 11, 2008 1:23 pm

also known as a "tri-Y" in a chevy. I also measured header length. Stock is the shortest at 1'10". I just checked 2 pipes on the D & G and came up with 2'2" and 2'8" for different length tubes.

cbx6ss · Post by **cbx6ss** » Wed Jun 11, 2008 5:17 pm

Looks like its hard to get at the oil filter. But if I had a set it might be worth the hassle.
/r
B

EMS · Post by **EMS** » Thu Jun 12, 2008 7:11 am

It may be a little hard to see, but my avatar shows the SchÃ¼le installed on a motor. The filter is easily accessible through the gap between 3 and 4, however, oil will spill on the headers when you take it off

Don #6141 · Post by **Don #6141** » Thu Jun 12, 2008 12:22 pm

This guy claims he can get you the Schuele exhausts:

Contact: Jason
6709 La Tijera Blvd. #823
Los Angeles, CA 90045 PH: (310)-668-1601

Price is $2288 for the unpolished pipes - The muffler is about $800 more

Don

EMS · Post by **EMS** » Thu Jun 12, 2008 1:09 pm

The header runs at around 1,500 Euro. At current exchange rate, that is already $2,300.- and then you don't have it here and Jason probably wants to make a profit. Unless Jason is a real philantropist, the $2288.- seem a little low.