Queen of Spades.
Sent you a PM with email

Cheers

 

QOS,
I will ask the guy to wait until i get some data from you .
I only went with the guy for the Mega header, The muffler is working out at $35 bucks , So i will ask him to stand by for a drawing.

George

 

Reaching out to you at your email address from PM's. talk soon.

 

Hey George did you get my emails from earlier this week?

 

Any updates ? So far I'm happy running my modified stock can with the Mega bomb ,I'm just curious ..

 

DonA, I assure you that if you are running a whole roll of exhaust wrap on the stock nipple of the stock can, in order to get a seal on the MB bell, you are defeating the purpose of owning a MB. The mismatching pipe sizes kill the MB..

 

Just to pull this back to focus, we are looking at a lightweight muffler which has stock-like dB output (in the 80-82db range). Most of us are less concerned with a slide degredation in performance.

Also, increasing backpressure isn't necessarily a bad thing, as it moves the power curve further down in the RPM range.

Definitely not a high-performance oriented thread here.

 

I sent George a few emails to his address a week ago (he provided via PM), and haven't heard a peep. Eager for a follow up.

 

I totally get it .. I can feel top end power loss everything else feels about the same maybe a little more grunt down low.I used a stock gasket that comes out of the stock header to mate up the exhaust to the MB ,I did it just for grins and curious to see if it would work . I'm going to put my Q4 back on, We're going camping the spark arrestor isn't exactly Forest Service approved..And I will leave the FMF on ..I miss all the power I paid for ...

 

QOS, please don't say this in my presence - it drives me crazy. You only loose power when you introduce a restriction into a well designed exhaust system.

This is how I think the "wives tale" of "backpressure = more TRQ" got started:

When you design an exhaust system, you do so with a goal in mind of how you want to mold the power curves. It turns out to be a fairly simple trade off: Relatively smaller, but properly calculated, Dia. "piping" will increase gas velocity, therefore increase scavenging, therefore improving TRQ in the "lower" rpm range - but at the expense of power levels in the upper rpm range. The upper rpm power levels are muted because such a system will "run out of flow" - due to a smaller flow capacity - than a system with properly sized, relatively larger Dia. piping. It could be said that such a system has, overall, more "backpressure" than a system designed with larger dia. piping - hence "more backpressure = more TRQ".. which has been twisted into anything that "adds backpressure" can increase TRQ..

It is a total corruption of the principals of exhaust system design..

BTW, I use this subject as a measure of intelligence/competence of shop owners/dyno tuners before allowing them to touch one of my bikes or my friends bikes..