The atvconnection main page now features an article so titled that was written July 9th.

When to Use a Resonance Chamber

I read it and felt that it should be corrected. But I had trouble figuring out "who" to contact and/or how to contact them to let them correct it.


I guess a guy wrote in a question somewhere...

And this becomes an article... but is lacking useful information if you too want to know anything about how to get the best out of your quad.... and/or if you are now willing to swallow the truth about 4 stroke exhaust.


The bottom line is this... if you want REAL performance, with a measurable increase in ANYTHING besides the noise level.... to be honest, you have to turn to a TRUE "TUNED" exhaust system. And true tuned exhausts are few and far between... because the masses are content to fork out hundreds for an exhaust that "sounds" like it is giving them more performance. So why invest in R&D when sound sells?

Well, it doesn't sell me.

I come from the days when an investment in off-road exhaust was worth it's cost in performance gains (the 2 stroke days) so up to this point I have not been at all impressed with aftermarket 4 stroke exhaust. My judgment is not clouded by sound, and my craving for performance is not satisfied by something that sounds more powerful.

So what is the point you ask?...

Well, if the person with the original question comes into this thread, I can pretty much guarantee you the buddy who gave him this priceless performance information either rides a dirt bike or has Jardine Exhaust like I do now.

Dirt bike R&D flies way ahead of quads in all sectors. Dirt bike guys are already experiencing the truth... and so am I since Jardine produces ATV exhaust with resonance chambers and I don't have to lag behind.

So the major correction in the article needs to be on the answer.

If this guy or any of you want to get the most out of your new exhaust system, go for a true tuned exhaust and invest in a Jardine Exhaust.

Jardine makes the RT-99 full exhaust for other sport quads, like I have on my KFX 450R

ATV EXHAUST ALUMINUM FULL SYSTEM at Jardine Performance Products jardineproducts.com

So the front page picture associated with the article should be changed to an image of a Jardine system, since this is an ATV forum and they make ATV exhaust with resonators.



This is the first off-road 4 stroke exhaust that has EVER impressed me.

 

Thanks

Very good info on your part.

 

Thanks...

Most guys are still suckered into believing their {insert big-brand here} 4 stroke exhaust system gives them big performance gains.

Truth be known, they could have probably gotten the same gain out of re-jetting to perfect.... and more out of a higher flow filter or intake with perfect jetting.

In order to get real performance out of exhaust, it must be true tuned exhaust... tuned specifically for performance with a specific engine... not sound.

Else, you just have a louder pipe, or one that changes the specific RPM where peak is made.

 

This is nothing but an attempt to get around FMF's patents on the PowerBomb and MegaBomb. A lot of folks think the FMF Bombs are just a gimick....but ask yourself why would everyone be copying them if that is all they are?????

Having a longer header, tends to increase bottom end. That is the main effect of a Bomb...it makes the header "longer" without actually adding length. Plus it also reduces sound a little. Both of these are positives for me!

 

We agree on a whole lot, but you won't get me to agree with ALL of that... lol...

The Powerbomb, Megabomb and Jardine's resonance chamber have "some" operational similarities, but are way fundamentally different in design and in how they work overall.

They both create more volume to suck the exhaust into, longer effective pipe length, and also reduce noise. But the design, and tuning are totally different... and the resonator is a step past the basic expansion chamber for 4 stroke applications only though.

I think the difference that would be simplest for you to understand is to consider the old 2 stroke pipes we used to have. If you understand how they worked... suck the exhaust out and fuel charge in, sometimes even out into the pipe, and then the return exhaust wave slams it back into the cylinder before the port closes... POWERBAND!

Likewise, I imagine the FMF stuff has an optimal rpm range it works in... where I don't think the resonator is effected. I think it does the same thing, just faster?

Also, I think you can see where there would be a return wave with the FMF, which comes in the form of undesirable back pressure on the 4 stroke engine where the resonator chamber eliminates that.

So although both do some similar things, the design is totally different, and so is the end result.


Please don't take any of the above as ****ing match material...

I'm only giving you a different perspective of it.
Just to get you really thinking about all a little more.

 

When I see things like this on Waren Johnson car I will consider it.............until then...............