Cat with Cam?

[whiteThunder]

I will have a cam in my 3.4 camaro hopefully within the next few weeks, and someone told me that i shouldn't run a catalytic converter with it because i will be passing so much air/ pollutants by that it will become clogged, is this true? Will running a cat hinder my performance. btw i have a 2.75 I pipe, with dual 2.5 tails out of a dynomax supertubo muffler. i have a catco hi flo 2.5 in-out cat currently on the car. if i decide no cat, should i get a dynomax bullet, or will it sound good

[viper98885]

I removed mine because with a big cam, I didn't want to choke the exhaust at all.

[firebirdv6 3.4]

i would say to remove it for better flow because the cam is going to increase the exhaust flow

[mjparme]

Originally posted by whiteThunder:
I will have a cam in my 3.4 camaro hopefully within the next few weeks, and someone told me that i shouldn't run a catalytic converter with it because i will be passing so much air/ pollutants by that it will become clogged, is this true? Will running a cat hinder my performance. btw i have a 2.75 I pipe, with dual 2.5 tails out of a dynomax supertubo muffler. i have a catco hi flo 2.5 in-out cat currently on the car. if i decide no cat, should i get a dynomax bullet, or will it sound good

With a new cam you should still be having a full burn on the fuel/air mix so I can't see how there will be more pollutants.

If there are more pollutants they would suggest to me that you aren't getting a full burn which would be bad.

I don't think that person knew what he was talking about.

Just get a high flow cat, CATCO or Carsound would be a good choice. Flow is good and you won't be hindering performance (maybe a few hp with a high flow cat, but not enough to be concerned about).

[zlexiss]

Originally posted by mjparme:
With a new cam you should still be having a full burn on the fuel/air mix so I can't see how there will be more pollutants.

If there are more pollutants they would suggest to me that you aren't getting a full burn which would be bad.

A big cam with lots of overlap can pull unburned a/f mix from the intake right into the exhaust at certain rpm ranges..