i have a 2003 sunfire , 2.2l ecotec , i already have taken out the mufflers and put straight pipes , i was thinking of taking off the catalytic converter
i was wondering if anyone has done this , is it going to be louder that it already is , how much power am i going to gain if any , and does it affect gas mileage ,
thanks in advance
Yes...it will be much louder without a catalytic converter.
It's not going to really help you power wise. As far as restriction, your catalytic converter isn't that restrictive...
What size piping did you put in?
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the piping is about 2 1/2'
since i did i felt a bit better acceleration
Marian Belea wrote:the piping is about 2 1/2'
since i did i felt a bit better acceleration
You'll feel a better acceleration but you probably lost power in the lower part of your RPM band because of the lack of exhaust velocity build up.
You would probably have a much broader powerband if you went with a 2 1/4" exhaust diameter, get a 2 1/4" diameter catalytic converter and a nicely designed header.
Just leave the catalytic converter on. It would be more beneficial to leave it on in many ways.
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Moving to Performance Section.
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