4 into 2 Exhaust

[Gosling1]

After a few inquiries about the 4 into 2 exhaust, here a few pics. The brazing looks crappy but it is still holding. The temporary hose clamp is gone. It started out as a R6 header. I cut it off just before the collector. A few pieces of pipe from the local auto part store provided the bends and adaptors. I didn't notice an performance gains or loses. It sure sounds different though. I contacted FosterRad after I ran it for a while (quoted below). I have since checked the plugs numerous times with not noticable difference. Now why did I do it?? Why not. I was bored on a rainy day and just started tinkering.


Greetings,

In all honesty you could have increased the scavaging effect.

Just have a look at the plugs and make sure they are the right color >light Brown. It very light in color you might be running too lean.

Call me if you are running lean and we can suggest some fixes.

I like tinkerers, where would we be without them!

Nice work!
Best!

Robert Foster
RapidBike USA
Oakland Gardens New York USA
718-468-4680
[email protected]
RapidBike USA


Quoting jduchock <[email protected]>:

> FosterRad,
>
> A few months ago I purchased the Laser Quad exhaust for my 2006
> Yamaha FZ6. I love it!!! Awesome sound. Being a tinkerer, I
> decided to try something a little different with what I have. I
> decided to try to make up a 4 into 2 exhaust using the four quads I
> have under my seat. I used a header from a R6 and cut the collector
> portion off. I then fabbed up tow 90 degree bends and some adaptors
> so I could route two pieces of 1.5" flex exhaust tubing to the
> quads. This in turn created a unique sound. I have been asked
> "Why??", Why not! I have yet to put this on the dyno to see what my
> results are. After almost 200 miles on my set up I haven't noticed
> any difference in power throughout the power band. The butt dyno
> says I have a better take off, but I would rather deal with actual
> figures. So the question remains, did I lose any scavenaging effect
> in my exhaust system?
>
> Chris
> Pinson, AL

 

[DefyInertia]

Am I going to get to see this thing in person later this month???

 

[Gosling1]

Sure thing. I plan to be up there around 11 ot 12 on the 30th......

 

[Wavex]

Thanks for the pics Gosling.

 

[cashcrzzy]

The mod that has been done here is not a good thing ! The reason I say this is there is only 1 oxygen sensor in the system and it monitors all 4 cylinders it appears that only one side is being monitored .
That being said If #1or 2 cylinder have a problem the computer wont know to shut down fuel or spark retard and that may do serious damage to engine ,in this case I think a ladder pipe welded between the 2 pipes and then weld in the oxygen sensor bung in the middle then you will have a smaller chance of possible damage .
?? Does the r6 dual pipe use 2 oxygen sensors ? If so can you swap wire harness and computer to protect the engine !
Greg A.

 

[Gosling1]

No O2 sensor on the 2006 year, maybe Cali but not on mine..