- Apr 4, 2009
- 26
- 0
- 1
I just ordered some cats yesterday, so that I can pass NC inspection. These are high flow, 300 holes per sq. inch.
2.5" Thunderbolt Metallic Catalytic Converter 415250
Questions: 1994 Mustang GT, 5.0
1) A mechanic told me that my car will idle much better with cats on it. Is there any truth to this?
2) How much horse power will I lose by installing the cats?
3) Will I gain low end torque?
I have read some articles and different posts for the past week. So far, more people say to gut them out rather than to keep the metallic brick in it. A lot of the hot rod and racing websites say to use metal bands on it instead of welding it in, due to rust, vibrations, and ease of changing it later.
I guess about 40 percent of the people say to keep the metallic brick in it and weld the cats in place. Most performance websites say that backpressure is a myth. Backpressure is a resistance to flow, but you need a Delta pressure drop when measuring pressures from the cylinder to the exhaust tract, and that anything after the headers is just an obstruction to overcome, such as cats and the muffler. I don't know???
This crap is really confusing! I will need to put the cats on it to pass inspection but it will only be a visual inspection, so they won't test it.
My new cats will be arriving tomorrow, and I still haven't decided if I will just install them or remove the guts out of them. Help me make a final decision!
Thanks!
2.5" Thunderbolt Metallic Catalytic Converter 415250
Questions: 1994 Mustang GT, 5.0
1) A mechanic told me that my car will idle much better with cats on it. Is there any truth to this?
2) How much horse power will I lose by installing the cats?
3) Will I gain low end torque?
I have read some articles and different posts for the past week. So far, more people say to gut them out rather than to keep the metallic brick in it. A lot of the hot rod and racing websites say to use metal bands on it instead of welding it in, due to rust, vibrations, and ease of changing it later.
I guess about 40 percent of the people say to keep the metallic brick in it and weld the cats in place. Most performance websites say that backpressure is a myth. Backpressure is a resistance to flow, but you need a Delta pressure drop when measuring pressures from the cylinder to the exhaust tract, and that anything after the headers is just an obstruction to overcome, such as cats and the muffler. I don't know???
This crap is really confusing! I will need to put the cats on it to pass inspection but it will only be a visual inspection, so they won't test it.
My new cats will be arriving tomorrow, and I still haven't decided if I will just install them or remove the guts out of them. Help me make a final decision!
Thanks!