Author Topic: 87 removed Cat Convertors....smells a little rich now  (Read 2028 times)

Offline sxgriff

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87 removed Cat Convertors....smells a little rich now
« on: January 10, 2012, 12:48:22 pm »
Hey Guys,
Had some new duals run with a H-Pipe. In the process,  I did away with the Catalytic Convertor. It helped teh performance for sure and emission testing is no big deal ariound here.
It seems to me now that it runs richer than before. I feel that I use a little more gas than before and have noticed the fuel smell more, especially when I just pull into the garage.
Is there any information about removing converters and it changing the fuel mix?
1987 R10 350TBI

Offline cruisinc10

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Re: 87 removed Cat Convertors....smells a little rich now
« Reply #1 on: January 10, 2012, 02:54:56 pm »
It is common that your going to smell more exhaust because the converter is no longer there to reduce the emissions and burn the extra fuel.
1986 C10 355Ci/TH350/2 inch drop/275/60/15 cooper cobra Tires/flat black w/pinstriping- sold

1984 K10 Silverado 305Ci/Th350/6 inch all spring lift/33/12.5/15 interco Trxus MT Tires/factory red and white-Daily Driver

Offline cruisinc10

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Re: 87 removed Cat Convertors....smells a little rich now
« Reply #2 on: January 10, 2012, 03:03:35 pm »
It would not hurt to check timing, carb adjustments also make sure the plugs and wires are good if it misfires you will smell extra fuel. hope this helps
-Mike
1986 C10 355Ci/TH350/2 inch drop/275/60/15 cooper cobra Tires/flat black w/pinstriping- sold

1984 K10 Silverado 305Ci/Th350/6 inch all spring lift/33/12.5/15 interco Trxus MT Tires/factory red and white-Daily Driver

Offline bake74

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Re: 87 removed Cat Convertors....smells a little rich now
« Reply #3 on: January 11, 2012, 06:37:12 am »
     As cruisinc10 stated, you need to go through and re-tune for no cat's.  There whole purpose is to make sure all the left over vapor has been burned, so that is what you are smelling.  After a good tune as it sits, it should run even better.
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom