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I got my new high flow cat last week=) and wow what a diff,my cat on my car had logged 100,000 miles and was really clogged now my car seems to flow a great deal with the header and 2 1/2 inch pipe.nowwonder my car would only run high 18's:( lol.now to take it to the track again....... p.s I took yalls advice and painted my tails red=)I'll post some pics later.
Should have just gotten a straight pipe. It would be a bigger gain but louder. I don't mind the noise though.
yeah but you lose torque because of decreased "exhaust velocity" :rolleyes:
anyway its illegal not to have a cat anyway, so why not be safe and keep your low end power?
what are you talking about its "back pressure" :lol j/kQuote:
Originally posted by bobafett
yeah but you lose torque because of decreased "exhaust velocity" :rolleyes:
anyway its illegal not to have a cat anyway, so why not be safe and keep your low end power?
i know, i have to fight the urge every time i start typing backpre....EXHAUST VELOCITY :D
damn you hypertechnical bastards!
Where did you get your high flow cat?Quote:
Originally posted by wprocomp
I got my new high flow cat last week=) and wow what a diff,my cat on my car had logged 100,000 miles and was really clogged now my car seems to flow a great deal with the header and 2 1/2 inch pipe.nowwonder my car would only run high 18's:( lol.now to take it to the track again....... p.s I took yalls advice and painted my tails red=)I'll post some pics later.
Im sorry but a straight pipe is just to blaring for me I dont like the high pitched sound,Igot my cat from a local performace shop its a carsounds brand and it has a stainless sheild=)all for $120.
Mine isn't a high pitch sound though. It's actually really deep sounding.
I like my highflow cat better than my straight pipe any day it kepps the low end well is legal and I think I lost nothing in the high end as exhaust velocity stayed the same while backpressure was allready plenty low so no gas reversion in the low RPM's
yeah, when i had no muffler it was not grownling either. It was more of a deep base-d sound if u might say, i wish i would end up with a muffler that would sound like that.
High 18's?? wow my car runs low 17s bone stock and it has leaky gaskets.Quote:
Originally posted by wprocomp
I got my new high flow cat last week=) and wow what a diff,my cat on my car had logged 100,000 miles and was really clogged now my car seems to flow a great deal with the header and 2 1/2 inch pipe.nowwonder my car would only run high 18's:( lol.now to take it to the track again....... p.s I took yalls advice and painted my tails red=)I'll post some pics later.
hmm i think that this illusion of lose of low end from increase scvenging is a farse. ive run striag pipe and cats and seen a negliable diference on the dyno and at the track in fact the one 2 1/2 no cat fully andrel bent system i had with no turbo ran better then the 2 1/4 system. and i was runnign a equal lenght 4 into 1 long tube large diamter header. the was a very minimal lose in low end TQ but it was all under 2200 rpm. that not even usable power down there. so your realy kicking you selves silly. free up the exhaust and learhow to luanch the car at 3000rpm with a stick and youll find a much improved ET in the 1/4 mile.
but that varies by local laws.Quote:
Originally posted by bobafett
anyway its illegal not to have a cat anyway, so why not be safe and keep your low end power?
Yeah I was surprised when I got the new A3 spec motor in, and still gained power with the 2.5" exhaust pipe. All I need is my ciustom header.
on a side note:
I changed out and emulsion tube on my weber to the F-50 instead of the F-6 and decreased my idle jets to 60/50 and turned the idle screw out only 1 to 1/2 turn. and I still run super rich. I know last time I had F-6 emulsion and the 65/55 idle jet and was able to turn the idle screw out 3 turns and get a stoich reading. so maybe it's the motor or the emulsion tube.
