dr bob

So... How hard did these new guys look under the car? The guy that smogs mine just asks if they are there.

Mongo

This guy looked and mumbled to himself "there's the air injection tube", then proceeded to prepare the dyno. Basic eyeball, the other shop was looking at everything, but nothing on the car for their 'friend'

Imo000

Si!!!

Mongo

It's even more ironic because I'm part Mexican and I can't speak a word of it!

hacker-pschorr

It's no more odd that I cannot speak German, Norwegian, and Icelandic.

Mongo

That's different. You are a bigger mutt than I am.

Bill51sdr

FINALLY!!

More damning evidence against cheap, A/M cats...

Mongo

Ironically, the cheap cats did keep the NOX down. With the OE cats now, the numbers went down to 200-250.

Mongo

Just out of curiousity, is it possible to feel a loss of HP when going back to the factory cats? Seems like ever since I ditched the 2.5" x-pipe and HF cats back to the OE setup, the car feels slower at the top end now.

DKWalser

Don't the makers of the x-pipe project an increase of 20-30 hp by replacing the standard exhaust with the x-pipe and HF cats? That's a 7% to 10% increase. I'd suspect you'd feel the loss of those horses.

Mongo

**** that's a lot for an exhaust pipe.

Imo000

I felt a loss when replaced the straight pipe with a converter on the '83. A proper converter needs an X amount of surface area to scrub the gases and this will increase backpressure and cost some hp.

mdkelly1

This is old news re: catalytic converter requirements, but there is a thread about it on the Turbo forum, so thought I'd post the referenced EPA link here.

http://www.epa.gov/otaq/cert/factshts/catcvrts.pdf