TrimDrip

I sold a friend some used bassani cats last week for his cobra. His passenger side cat had given up and started making an awful racket. He put my set of cats on that didn't have 2000 miles on them. Within a week the passenger side cat had given up again. What gives????

The car is not stock by no means. It runs 7.20s.

pcs

is the rachet coming from the inside the cat?
7.2 on?

St4ng07

Main cause for going through cats is running super rich. Fuel does carnage to cats.

TrimDrip

it is destroying the honeycomb inside the cats. When I shake them, I can hear it.

The 7.20 is in the 1/8 mile. It is still a stock car at full weight. The blower has been ported and is well in the teens in boost.

I will let him know about running rich. I assume he will go through another before the weekend is up.

limp1969

mine almost did not pass smog when i bought it. 800 miles later it would not pass. Had to replace the cats. It has a 2.80 pulley LT bbk headers and a tune.

TrimDrip

When they pulled his car off the rack, I couldn't even smell it. I also didn't see any smoke out of the car when he left. I guess it could be a different story when pushing the upside of 15 lbs or more.

simpsonfan13

bad 02 sensor could cause this.
go to pepboys and have them run (or attempt to run since the car is modded)
a diagnostic. and see if it throws any codes..
it's a free service

pitmitch910

yea watch it beinig tuned my sct manual says no ecu can be done really cause its not stock

Smokin04

Long tubes can melt cats if you hit the rev limiter any amount of time, run retarded timing or race fuel. A couple of guys on the other boards were mentioning and showing pics of melted cats due to heat in the exhaust. I'll look it up...

read here:
http://www.modularfords.com/forums/s...t=melting+cats

TrimDrip

thanks. I bet it is something due to like what you are talking about. I guess we will see after he takes it to the track this weekend and see how it does.