you are talking about 2 different engines with 2 different fuel delivery
system.

On Thu, Apr 16, 2015 at 9:00 PM, Richard A Jones <Jones@colorado.edu> wrote:

> Dan N <dn92610@GMAIL.COM> wrote:
>
>> I have hear that without the CAT the O2 sensor won't work correctly
>> because
>> of lack of back pressure. If you really want to bypass the CAT the best
>> solution is using an old CAT and partially gut it out then you will have a
>> bit of back pressure for the O2 sensor. Just hear say I didn't try it...
>>
>
> Where DID you hear that?  Tell Ken Lewis who put a bung in the exhaust
> of his 356 and uses the O2 sensor to tune his carbs.  Or all the cars
> that use a second O2 sensor AFTER the cat.
>
> Richard
>