testpipe vs gutted cat. con. or hi-flo cat. con.

i know they are realitively the same...but is there any difference (i.e. backpressure, tourque loss/gain)...thanks


[Modified by 98DC2, 12:08 PM 10/3/2002]


[Modified by 98DC2, 12:33 PM 10/3/2002]

 

....?

 

anybody?

 

gutted cat will hurt some perfoamance b/c it creates exhaust turbulence and will hurt the exhaust flow. a car-sound cat's cfm numbers flow just about as well as a straight pipe and doesn't have the nasty smell/sound.


[Modified by DefiantGSR, 10:42 PM 10/3/2002]


[Modified by DefiantGSR, 10:43 PM 10/3/2002]

 

There is virtually no difference
Comparing a 2.5 in. testpipe (RED) to a 2.5 in. Carsound cat (BLUE) in the same ITR ( 1.8L B18C5 ) with a CAI, an SMSP 4-2-1 long hybrid header (2.5 in. OD collector), and SMSP 2.5 in. OD exhaust:




[Modified by DefiantGSR, 10:46 PM 10/3/2002]

 

test pipe- for power, cat- not to get noise tickets!

 

THANKS...