This is topic cats / performance??? in forum Tech Talk at Northern California Ford Owners  .


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Posted by ADMS5OH (Member # 1060) on :
 
what effect do catalytic converters have on performance? I have read that removing cats on a near-stock engine will result in a loss of torque but what about a mildly modified engine with longtubes?

Is smog the only deciding factor?
 
Posted by Quick 88LX (Member # 1950) on :
 
No matter what a cat will restrict exhaust flow. If you can swap shorty h-pipes every 2 years, which is NOT hard, then you will be fine.
 
Posted by shade-tree (Member # 298) on :
 
I think on a stock motor cats are stealing about 5 HP (assuming they are in good condition).

Plugged cats can be quite the performance detriment!

as far as torque goes, I think that's a bunch of crap. I don't see torque gains from having corks in your exhaust.
 
Posted by st5150 (Member # 51) on :
 
quote:
Originally posted by Quick 88LX:
If you can swap shorty h-pipes every 2 years, which is NOT hard, then you will be fine.
Swapping H pipes every 2 years isn't so bad, but swapping long tubes off and on in a 72 hour period was kinda a pain in the ass [Smile] Two years from now, I'm going to try and sneak the long tubes through the system.
 




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