CATS???

[LITZ]

i was just wondering how long the cats last?? my sho has 123000mi, and should get a 60k done. i was thinking that with this amount of miles on my car the cats could be cloging up. shoud i nock them out??

 

[shojuan]

My car has 161,000 miles. I took the y-pipe off last November at about 152,000 miles or so, I forget exactly what the mileage was. It was over 151,000 miles. Anyways the stock y-pipe with cats sat on the garage floor until this last weekend when I reinstalled it to go take a smog test. BTW, without cats my SHO is nice and stinky!

Here are my numbers. This should answer for you how long the cats can last:

2500 rpm 1 ppm HC measured (140 ppm allowable)
2500 rpm 0.00% CO measured (1.00% allowable)

idle rpm 7 ppm HC measured (120 ppm allowable)
idle rpm 0.00% CO measured (1.00% allowable)

As long as the car is in a reasonable state of tune (my SHO got its first 60K ever at 148,000 miles) the cats can last a very, VERY long time! It's when the car is running far too rich or missing that the cats get too hot and burn themselves to death.

 

[LITZ]

ok well my sho is running good so they shouldnt be a problem i hope to get a high flow y pipe on some time but realisticly that wont hapen untill after winter. i do think i need the 60k soon. im not shure it is time though 12300 mi. when you had your 60k did it bring more life into your car i feal like mine could be lacking power. espetaly after my crappy 1/4 mi times at 16.55 and with a 60ft of 2.8 or so( i know the 60ft isnt to good)

 

[shojuan]

LITZ:
when you had your 60k did it bring more life into your car

Oh yeah!

 

[91 SHOplus]

LITZ:
...im not shure it is time though 123000 mi.

Not time yet, you should be on your second one.

 

[NotSoSlowSHO]

yes, 60k as in every 60,000 miles jpshakeh

 

[LITZ]

yea this would be this cars 2nd 60k it had one back in 97. i just need to find a place to do it im thinking cin cy sho i dono i just moved to indiana so im trying to find a good place.

 

[91 SHOplus]

OK, so why don't you put up a "where to get 60K in Indy" thread?

I'm sure sopmebody could give you a good place to go, or help you do it yourself, if you are so inclined.

Getting back to performance, a clogged cat can rob some serious ponies from you. The fresh timing belt in a 60k will also make a major difference.

Good luck! thumb

 

[LITZ]

ok thanks i was just seeing if the cats go bad after a some time but it hasnt been running ritch or any thing. i felt a slight lack in proformance so i was thinking maby its the cats. but we will see in a month or so when my 60k is done.