My new motor exhaust is killing me. I can't stand it, my old 5.3 never had a big exhaust order, the header and pipes are the same as before but this is a 6.0 with .20 over with a str3 cam, had a quick tune for break in. What should I look at doing so I can lessen the smell?

new motor

 

Add a high flow low cell count converter to lessen the smell or learn to tune it to help with the exhaust smell.

If you know what you are doing you can mess with the injection timing for the fueling so it won't smell as bad. Fixing the overall airflow model and getting timing in order can help with the smell too.

 

You are leaving out key details.

Whats the AFR at idle? What is idle timing? For all we know the tune is way off and its really rich.

 

Thanks. But I already have high flow cats..Thinking its the tune cause of the cam.

 

I will check that. I used the same tuner as before. But I think its off as well.. Thanks for the input..

 

 

Is that the btr stage 3 truck cam or btr stage 3 ls3 cam??

 

HP Tuners... Its still a little rich but my other tune was a little rich as well so it might have more to do the cam cause it sometimes has miss fires at idle.

 

I think its truck but can't say 100% as the person I got it from was suppose to send all the cam info but never did.