Clogged cats with forced induction?
12-03-2010, 08:40 AM
#11
6th Gear Member
Join Date: Nov 2007
Location: Montaner
Posts: 6,193
Running on 7 cylinders? Am I missing something?
There were two people on the other forum that had clogged Kooks cats resulting in a blown engine IIRC. One of them has already been named.
I haven't read of anyone with a clogged stock converter.
There were two people on the other forum that had clogged Kooks cats resulting in a blown engine IIRC. One of them has already been named.
I haven't read of anyone with a clogged stock converter.
12-03-2010, 10:03 AM
#12
5th Gear Member
Join Date: Dec 2006
Location: Redding, CA
Posts: 4,552
The only reason I am going to put the non-catted pipe in is so I can run my 2 step at the track.
It dumps while fuel on the 2 step so my cats would be toasted in 1 or 2 launches. At close to $500 for new cats, it's worth me spending 150ish for an off road pipe
It dumps while fuel on the 2 step so my cats would be toasted in 1 or 2 launches. At close to $500 for new cats, it's worth me spending 150ish for an off road pipe
12-03-2010, 12:48 PM
#14
3rd Gear Member
Join Date: Apr 2008
Location: Merritt Island, FL
Posts: 996
Jim Jr at JDM told me it was a real good idea for me to cut out my HF ceramic cats as they would melt in less than 6 months with FI. I am having that done and placing some 12 inch cherry bomb mufflers to act as a resonator. My exhaust is very strange. It goes in this order.
Pypes Longtubes
H pipe
12" cherry bombs
pypes m80s
flowmaster American Thunder mufflers.
Cams, longtubes and FI equals one loud as car!!!
Pypes Longtubes
H pipe
12" cherry bombs
pypes m80s
flowmaster American Thunder mufflers.
Cams, longtubes and FI equals one loud as car!!!
The driver's side fits up fine, but the passenger side is complete trash. Gonna be replacing the the Pypes section with the factory over axle pipes soon. Cams and O/R X with M80s makes for a very loud car. Best $300 ever spent for the Flowmasters!!!
12-03-2010, 01:01 PM
#15
Join Date: Oct 2010
Location: NC
Posts: 6
Clogged cat
Here is something to think about, I have run two new Turbo systems with DI. First a 2008 Saturn SKY and Mazda Speed 3, both clogged the cats. On the Sky board it's happened many times. On the Mazda board the last time I was there it had 26 shot engines. so what does this have to do with the price of tea, the DI engines produce a lot of carbon and thats there big problem, and if ford put DI in the 5.0 like there saying the problems will be big. seal9
12-03-2010, 08:42 PM
#17
6th Gear Member
Thread Starter
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
You must have missed my post about the car running like **** at part throttle. Some of my accel cops were failing, but didn't set a code. Instead they caused unburnt fuel and oxygen to exist through the exhaust and the computer sees this as a lean condition and keeps adding fuel until it eventually sets a lean code. It's a viscous cycle. My long term fuel trims have been high ever since. Usually 10-12% at idle and part throttle. I'm going to pull the mid pipe in a few days and smash that **** out of there for good measure. I'll put the stock muffs back on if necessary. My only concern is it will smell like ****.
Last edited by moosestang; 12-03-2010 at 08:47 PM.
12-04-2010, 02:47 PM
#20
5th Gear Member
Join Date: Oct 2009
Location: Maui
Posts: 4,752
IMO pypes HF cats are ****. I smell the fumes bigtime with them installed. I dont expect the fumes to be any worse with them gone. As far as loudness. My car is very loud but livable right now. Thats why I am replacing the HF cats with cherry bomb glasspacks. I like a clean tone. Everytime you add a new engine mod its gonna change the tone. For me LTs made it loud. Cams even louder. FI even louder.