Whats the best catylac converter size

[mrnickleye]

If your car is running 'really' nice, and all the systems are working normally, then a performance cat should be OK. But if anything else is wrong, the perf. cat may not work as efficient as a regular size 'normal' one.

The perf. cats tend to flow more freely.

I recommend going with a 2.5" system for a N/A, and 3" for turbo.

[88Tsupra]

thanx..well im going with a inch cuz its turbo...but can u help me with one more plz....wen idling or just driving i can smell fuel from the engine and it smells strong sometimes and sometimes u just cant smell it at all..what can i do to get rid of this ...and will just getting a new cat work fine...

[mrnickleye]

On mine, with everything tight and new and NO exhaust leaks, I can sometimes smell exhaust.

Sometimes you will get some fuel that has more sulfur in it than at other times. The cat will cause it to burn and smell bad, especially on the de-cel (letting off the throttle).

Also......
My seal on the back hatch is torn along the bottom, with some cracks. Its right where it will get damaged from putting things into the trunk, like luggage, so prbably lots of supras have this problem.

I know that's where it comes in at.

The seal is about $65 at dealer.

On mine, the rest of it is good, and rain does not enter, so I just don't spend the $$

If the heater/ac is on with the fan, and outside air coming in (not recirc), it will keep the smell from coming in because the cabin is pressurized.

[88Tsupra]

so there might not be a need for a new cat then cuz the car only has 100k miles on it ...that saves me money if its always like that thanx man