High Flow Cat. Converter users - please help
Thread Starter
Le Mans Master
Joined: Jun 2002
Posts: 6,097
Likes: 2
From: Cincinnati Oh
High Flow Cat. Converter users - please help
I'm down to choosing the converter for my exhaust system, and I'm stuck. I really don't want to fork over the $$$$ for RT's, and I'm debating between Catco and Carsound. Given the flow numbers from http://www.ls1.com/forums/showthread...t+Flow+Numbers it looks like the base RT doesn't flow all too great, comparatively, and may not justify the price. The metallic RT would be ideal, but very expensive.
I'm looking for opinions from all regarding which direction to go, regardless of what you're using. Do I have room for the Carsound or Catco? Are there any issues I should be aware of regarding any of these converters? In addition, do I need air fittings or o2 bungs in the converter for my car? Going w/out cats is not an option due to emissions testing, and I could pass our test with the setup below.
I will have Exotic Muscle LT headers, a high flow cat?, x-pipe, and magnaflow mufflers. All will go on at once and contain custom pipes where needed. The headers are still sitting in my garage, and I'm tired of tripping on them, and tired of certian forum members teasing me about my quiet stock exhaust. You know who you are... :D TIA
I'm looking for opinions from all regarding which direction to go, regardless of what you're using. Do I have room for the Carsound or Catco? Are there any issues I should be aware of regarding any of these converters? In addition, do I need air fittings or o2 bungs in the converter for my car? Going w/out cats is not an option due to emissions testing, and I could pass our test with the setup below.
I will have Exotic Muscle LT headers, a high flow cat?, x-pipe, and magnaflow mufflers. All will go on at once and contain custom pipes where needed. The headers are still sitting in my garage, and I'm tired of tripping on them, and tired of certian forum members teasing me about my quiet stock exhaust. You know who you are... :D TIA
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: High Flow Cat. Converter users - please help (all4c4lt4)
I run a single std size RT hi-flow cat on my '88 but don't know the P/N. With it and a 160 deg stat I easily pass the E-Check dyno in Summit Co in late January. My cat cost $225 direct from RT.
It looks like the RTs listed are higher price & lower flow due to the smaller size. I'll bet the std size RT flows pretty well too.
Check out your stock cats and go with the Car Sound (or a std size RT) if space allows. That larger RT bullet cat looks like the type & size I've seen on L98s with 3" true duals; I'll bet your stock cats are larger.
BTW, thanks for this good info; I'm filing it away.
It looks like the RTs listed are higher price & lower flow due to the smaller size. I'll bet the std size RT flows pretty well too.
Check out your stock cats and go with the Car Sound (or a std size RT) if space allows. That larger RT bullet cat looks like the type & size I've seen on L98s with 3" true duals; I'll bet your stock cats are larger.
BTW, thanks for this good info; I'm filing it away.
Melting Slicks
Joined: Apr 2001
Posts: 2,474
Likes: 1
From: Drive it Like You Hate it Cincinnati OH
Re: High Flow Cat. Converter users - please help (all4c4lt4)
...and tired of certian forum members teasing me about my quiet stock exhaust. You know who you are... :D TIA
BTW, I'm thinking of the Catco's when I install headers. Assuming they'll fit.
Burning Brakes
Joined: Aug 2000
Posts: 984
Likes: 1
From: Cincinnati OH
Re: High Flow Cat. Converter users - please help (all4c4lt4)
You finally gonna work on that there 4 cylinder? :jester
You don't need any air fittings, the air injection is into the two air fittings on the #5 & 6 header tubes. The headers collectors each have an O2 bung, so you are ok there also. I guess you need rear O2 sensor bungs on OBD II cars, but the exhaust shop would put that somewhere downstream of the cats, so you don't need anything special on the cats at all. My car is levitating on jack stands right now so I can measure clearances if you need some ideas...
You don't need any air fittings, the air injection is into the two air fittings on the #5 & 6 header tubes. The headers collectors each have an O2 bung, so you are ok there also. I guess you need rear O2 sensor bungs on OBD II cars, but the exhaust shop would put that somewhere downstream of the cats, so you don't need anything special on the cats at all. My car is levitating on jack stands right now so I can measure clearances if you need some ideas...
