Pick my next mufflers *VOTE*

[ugly_blazer]

[ QUOTE ]
i've got a 82 buick regal and it makes a "frr frr ka ka ka brrr" sound when i try to pass. whats wrong with it?

[/ QUOTE ]

Muffler bearings? /forums/images/graemlins/dunno.gif

 

[Blue85]

OK Tim, here's the question for you:

How do you generate the standing wave that produces scavenging without any backpressure?

Do you understand wave theory?

 

[Jonny-K5]

[ QUOTE ]
Muffler bearings?

[/ QUOTE ]

naa i dont think so. the guy i bought it from said he just installed new muffler bearings. maybe he used lower temp tailpipe grease instead of the traditional muffler grease.


whats better, regular muffler grease or that synthetic stuff? i've heard the car makers are using the synthetic stuff on all new car mufflers now. the guy at carquest told me if i use synthetic muffler grease i will see a major power increase, more so than open headers.what do you think? /forums/images/graemlins/dunno.gif

 

[generalleeloaded]

[ QUOTE ]
[ QUOTE ]
Muffler bearings?

naa i dont think so.

[/ QUOTE ]

Hey you might check the blinker fluid!

 

[js4x4]

I am amazed! (and quite amused) at how this simple poll on what kind of muffler one should buy to a semi scientific working of the internal combustion engine. you want loud, just take off the manifold back...let us know how it works out for you...then theres no back pressure and you don't need to worry about those pesky muffler bearings (a real pain to change out i hear!) /forums/images/graemlins/rotfl.gif

 

[Twiz]

[ QUOTE ]
[ QUOTE ]
Bla bla bla...I could feel a lack in low end when I drove to the muffler shop with open headers compared to driving back with my flowmasters plumbed back in.

[/ QUOTE ]same here, when i drove mine to the muffler shop part throttle low rpm torque was considerably less with open headers.

[/ QUOTE ]

Likely due to the Atmosphere Air Pressure being able to creep it's way back up the primary exhaust tube. Thats 14.7 psi on a 1.6" valve, times (X) eight. That a rather large amount of pressure the engine has to "push out" (I'.E. pumping loss). Which is why collector extensions exist.
Collecting each individual exhaust tube and combining them into one - will produce enough velocity to prevent reversion, assumeing the collector is long enough.

It's not the loss of "back-pressure" that decreases the low-end power-out put, it is the increase in pressure working against the exhaust flow, increases pumping losses and therefore engine out-put.