Removing cats - Page 2 - ZR-1 Net Registry Forums

secondchance · 08-08-2012

Quote:

Originally Posted by RICKYRJ1

I have been running with no cats for about 3yrs now. Marc H. did my car, he said about a 4hp gain. I also have zero issue with any kind of foul odors except burning rubber

Like I said - it's a good smell - it smells like... victory!

Dime · 08-08-2012

Quote:

Originally Posted by RICKYRJ1

I have been running with no cats for about 3yrs now. Marc H. did my car, he said about a 4hp gain. I also have zero issue with any kind of foul odors except burning rubber

Yep, just got an email from Marc. He said around 3hp or so, and around 25% louder. Thanks for the help all.

Kevin · 08-08-2012

but with the corsa, still no drone.

VetteMed · 08-08-2012

Quote:

Originally Posted by Kevin

but with the corsa, still no drone.

Agreed, same here. Headers, no cats, Corsa, and very pleasant at cruise.

RICKYRJ1 · 08-08-2012

Quote:

Originally Posted by Kevin

but with the corsa, still no drone.

I have corsa no drone

CamP · 08-09-2012

Quote:

Originally Posted by rhipsher

For us guys with 90's it's only a little more than two years and we will be exempt from emissions testing. And on that day the cats are coming off. Oh yeah!

I am looking forward to my '90 turning 25yo, getting Texas antique plates, and saying good-by to annual inspections.

In the meantime, there's a loop hole around emissions testing in Texas. If your car is driven and stored less than 60 days a year in a emissions testing county, you can obtain a safety-only inspection from a non-emissions county. This is the case even if the car is registered in an emissions testing county. You just sign a affidavit, and you're off. The best part is it's just $14.

Kevin · 08-09-2012

my car hasn't been smoged sine 1999, and it was exempt before that

Bob Eyres · 08-09-2012

I took the cats off in 1995, and it still passed the smog test. I've got headers, B&B 3" exhaust, and the sound is pretty wicked.

If you've got a lot of miles on those cats, you may experience more of a horsepower jump than you expect if you take them off, because of particulate buildup in the cats restricting the exhaust flow.

You've got a white car like mine, and might also see unburnt hydrocarbon stain on your rear end over time. (I hate it when that happens

).

So, make sure you keep your big white butt clean and you'll be good to go.

08-08-2012	#13
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: Removing cats but with the corsa, still no drone. __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

08-09-2012	#17
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: Removing cats my car hasn't been smoged sine 1999, and it was exempt before that __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

08-09-2012	#18
Bob Eyres Join Date: Jul 2005 Location: Jupiter, Fl. Posts: 815	Re: Removing cats I took the cats off in 1995, and it still passed the smog test. I've got headers, B&B 3" exhaust, and the sound is pretty wicked. If you've got a lot of miles on those cats, you may experience more of a horsepower jump than you expect if you take them off, because of particulate buildup in the cats restricting the exhaust flow. You've got a white car like mine, and might also see unburnt hydrocarbon stain on your rear end over time. (I hate it when that happens ). So, make sure you keep your big white butt clean and you'll be good to go. __________________ "It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft.