another cat thread
#1
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Car: 1991 Pontiac Firebird
Engine: Lo3 305tbi
Transmission: 700r4 auto
Axle/Gears: 10 bolt 2.73
another cat thread
I am running a cat-back exhaust on my 305tbi and i was wondering if I should gut out my cat or just get rid of it all together and put in a test pipe ? whats the horsepower gain..... if any at all. also how much louder will it make my exhuast? thanks !
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Car: '10 Subaru Forester
Engine: 2.5 Boxer
Transmission: 4EAT
Axle/Gears: 4.44
Re: another cat thread
It will be louder with either, you'll get less popping from a test pipe than a gutted cat. Is that legal in NH though? However, the power loss from a new high flow cat vs a test pipe is going to be negligeable...
#4
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Car: 1989 T/A
Engine: PROCHARGED LB9
Transmission: FB BUILT 700r4 2200 stall
Axle/Gears: 10 BOLT EATON 3:73 POSI
#5
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Car: 1987 Firebird
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Re: another cat thread
Cats are very restrictive, you'll free up alot of power no matter what you do to it. Im not sure what a test pipe is, but you alos may want to investigate how your car will act with less back pressure. A freind of mine has a F-150 i beleive its EFI not TBI but hes running into probelms because his O2 sensor is no longer reading within a range of a present cat since he now has straight exhuast.
Have you looked into one of those aftermarket high flow cats?
Have you looked into one of those aftermarket high flow cats?
#7
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Car: 1991 Pontiac Firebird
Engine: Lo3 305tbi
Transmission: 700r4 auto
Axle/Gears: 10 bolt 2.73
Re: another cat thread
i know my car doesnt have any ***** but it still smokes the tires, handles decent, and looks good. iam happy with it
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