Six into Six Exhaust Any Suggestions

alimey4u2 · Post by **alimey4u2** » Thu Aug 02, 2007 4:15 am

Land_Shark wrote:Just out of curiosity, are there any jetting/airflow issues with putting a 6-6 pipemaster on a stock '80?

Interestingly, I swapped a set of RC headers with Pipemasters & found no change in jetting or "noticable" performance. However the exhaust note changed to a very pleasing note.....a little loud but loverly....

Land_Shark · Post by **Land_Shark** » Thu Aug 02, 2007 11:37 am

Good to hear, thanks!

cbxtacy · Post by **cbxtacy** » Thu Aug 02, 2007 9:28 pm

Has anyone remember what the Denco 6 into 6's sound like?

steve murdoch icoa #5322 · Thu Aug 02, 2007 10:21 pm

Unfortunately no.
The only Denco pipes i have ever heard were on my hot rod GT750.
What a wail!
I do have a set of the 6-6 Dencos waiting for a refurb.

cbxtacy · Post by **cbxtacy** » Thu Aug 02, 2007 10:26 pm

I also have a set waiting for a refurbish. eventually they'll go on my wire wheeled bike and the 6 into 2 right side exit currently on it will go on my CBX with the tracy body.

EMS · Post by **EMS** » Fri Aug 03, 2007 7:31 am

cbxtacy wrote:. eventually they'll go on my wire wheeled bike and the 6 into 2 right side exit currently on it will go on my CBX with the tracy body.

Decisions, decisions, decisions...

I don't envy you, George, a for having to juggle all these different CBX projects...or maybe I do

steve murdoch icoa #5322 · Fri Aug 03, 2007 7:31 pm

I quit thinking about bikes every time George mentions Tracy body.
I think Ms. Lords and him are connected somehow.

cbxtacy · Post by **cbxtacy** » Fri Aug 03, 2007 9:36 pm

I'm sorry Steve, Traci's real name is Nora Louise Kuzmas. She got her stage name from the character Kathryn Hepburn portrayed in The Philadelphia Story, 1940. Should I refer to it as the Nora Louise Kuzmas Body?

steve murdoch icoa #5322 · Fri Aug 03, 2007 10:02 pm

Sorry sir, i can't talk right now as i am heading to the video store to do some "research".
I can imagine Ms. Hepburn reaction when that news came out.
A CBX engine in a NLK body does have a nice ring to it.

CBXTRA6 · Post by **CBXTRA6** » Fri Aug 10, 2007 8:18 pm

<<Has anyone remember what the Denco 6 into 6's sound like?>>

Howdy George, don't know if this statement above is sarcastic or not

you among all people probably know about the Denco's...

I rode with a guy here in NJ who had a set. If memory OK, they were real
6 into 6 , fit and finish questionable, sounded really loud and obnoxious, but that was part of the fun back then.

+ 1 on all previous comments on Pipemasters , need to massage them a bit for alignment and side stand rest , also the center stand on mine which required making a bracket to align the rubber grommet stop.
But at the end, it's worth it. The best looking set on any CBX (earlies or pro link )

For jetting, they will work fine with just a stage 1 Dynojet, harder with a stage 3 + indiv. filters.

FWIW
I had picked up a set of what was described as Yoshimura 6 in 1
(Thank you George

)
and had it finished by Jet Hot, it required removal of the center stand
(bummer) but looked pretty cool and sounds amazing, even better than my Pipemasters, BUT I noticed a definite loss is power from 6 G's and up
It runs a little smoother in low and midrange but not as strong on the top.

This observation seems to confirm what was written by all previous CBX gurus on the subject, that the 6 in 1 may sound cool but is not the choice
to make for performance, in my opinion and based on my own previous tests,
a well tuned Supertrapp with correct jetting (open race caps) runs really well , and the Pipemasters even better.

cbxtacy · Post by **cbxtacy** » Sat Aug 11, 2007 9:30 pm

Actually it's not sarcastic, I know it's hard to tell with me sometimes. I've never heard a set of Denco's but they look like they're going to be loud. Their simple construction means it should be easy to find baffles to quieten them down a bit.

I have a set of Super Trapp's with a polished/open baffle and they're loud. With the closed end cap I just don't believe they're efficient but they are quiet and pretty. I'm cleaning and polishing them and then I'll sell them. They will be expensive because they will be attached to a bike. I'll put them here first when I'm ready. They'll be on the bike that Jack built.

Land_Shark · Post by **Land_Shark** » Sun Aug 12, 2007 9:08 pm

There's just not enough sarcasm in this world, and so George is providing a valuable service ;)

Anyway, I wonder why Pipemasters didn't make these a true 6-into-6? The collectors could easily have been fabricated with seperate pipes and yet they went to the trouble of removing the material to sandwich the three together. They maybe know something that nobody else does?

EMS · Post by **EMS** » Mon Aug 13, 2007 7:36 am

Crossovers (connecting headers before the mufflers) have been known to widen the power band and provide more torque at lower rpms which may make a bike more rideable on the street.

Land_Shark · Post by **Land_Shark** » Mon Aug 13, 2007 10:42 am

Probably why everyone with Pipemasters seemed to like them ;)
So a true six-into-six would probably be less flexible or less 'street-able'.

alimey4u2 · Post by **alimey4u2** » Mon Aug 13, 2007 11:09 am

I always look at a multi cylinder engine as a team of horses, in this case 6. If all the horses work in unison the end result would be a greater tractive effort. All horses doing the same work instead of pulling a few of the lame ones along....
The CBX engine is a compromise from the get go, being limited by the differing inlet tracts. To manufacture an exhaust system that negates the differences would be costly & probably impractable. The guys that run 6-6's swear by them & vice versa......