Should there be any? I am considering measuring one day. I think the best place would be in front of cats, on each bank. Any thoughts?
Some of you may be wondering why even check it, just install the best flowing exhaust you can. Reason is this... I have stock piping and the best Flow Pro Muffler money can buy for flow and quietness. I always thought it was nice a quiet, but after towing with my Radix I have changed my opinion. It is still very good, just louder than stock. It gets so droany at a certain RPM, say when it is towing going up small hill and loaded good. I have to shift it into 3rd or slow down to lower RPM or else my 10 month old wakes up a looks at me as if I was the devil. Not good. So I installed a 3.5" straight through race muffler on the tail pipe. Right beside spare tire. Flo Pro is still on there too. It fit okay and looks very nice. All welded and everything. It is way beter so far, I have not towed yet but even around town it is way different. Now I am not sure if I lost a bit of power, or if it is the heat outside and A/C on or what. So I may check exhaust pressure and see. Someone tell me if I am waisting my time here, is there perhaps a beter way?

 

Granted, I am no expert. But Magnuson has always, and always will, design our systems to be used with stock exhaust components. So with that beings said, will having as much back pressure as you did with stock exhaust hurt? I would say no way. If you are running stock tune (of course who does any more) I will say your good.

 

what's the question again? if the additional muffler quiets things down for you I see no other real impact other than the visual effect of a muffler hanging off your tail pipe (your words)

 

never mind

 

Okay, I am just thinking would this straight threw resonator (actually is a race muffler) add a restriction to flow and hurt the already warm EGT's. At first I thought the power was less, but now I think I worry to much.

 

I think you have nothing to worry about.

 

Maybe I should attach these.

 

All the normal rules about backpressure don't apply with forced induction. The purpose of backpressure on a naturally aspirated engine is to make up for the loss of intake runner and port velocity at the lower flow rates of part throttle to keep cylinder pressures high. Backpressure reduces scavenging of the combustion chamber and keeps the effective compression ratio higher.

With a supercharger you can make up for that by simply forcing more air and fuel in. Instead of unburnable exhaust making compression you now have cooler burnable air and fuel.

With boost it should be free-flowing with the minimum amount possible backpressure.

 

Thanks James. I kind of understood that is what I would want. What I was worried about was too much backpressure. I would love to open her up and make no back pressure, but I need it quiet. I will just run it and watch EGT's.

 

I can relate to that. I've come pretty close with my current setup but now realize there's just no such thing as free-flowing AND quiet. I can't stand noise, personally. Smaller tubing smooths out pulsation and larger just blasts the pressure wave right through. I've got 4 mufflers and 2 cats on mine now and it's close to what I want but still too loud. The ideal scenario would be full stealth-mode silence so I can sneak up of unsuspecting rice.
I've considered taking all the carpet out and laying down Dynamat. I know that stuff works for interior resonance.