I currently have a catless bbk x pipe but I want to get rid of that overwhelming smell. I wanted to know which cats should I pair it with and how many (2 or 4).
My set up right now is mac unequal shorties, catless x pipe to some super 44 flowmasters
Youll smell exhaust fumes if you dont run converters on the car,unless of course a tuner can burn a chip that will help the engine run alot cleaner than it normally does without converters.Im not sure how clean the tuner can get it,but its still gonna put out more fumes than it would if the car had converters,most likely.
All of the aftermarket pipes that come with converters uses just 2 converters.There are two steps in the catalytic process,reduction & oxidation.The stock hpipe uses 2 converters on each side because the first converter done the reduction process & the second converter done the oxidation process.On the aftermarket catted x/hpipes,one converter(on each side) takes care of both the reduction & oxidation process.If you look at the catted xpipes available,youll notice they all come with the air tube welded into the pipe(before the cat)or its welded into the side of each converter,so you can connect the smog pump/thermactor system to it.The extra air from the smog pump is needed to keep the converters from clogging.The only problem I see, with you welding converters in place,is to figure out a way to weld a tube in place or buy converters that has a tube welded on already. Im sure somebody will chime in shortly with more info.Some guys might actually be running the converters without the smog pump & if so,maybe they can post whether theres any clogging or ill effects occurring by not running the smog pump.If thats the case,you might not have to worry about the tube,but from what Ive heard the smog pump needs to be run alongside this type of converter.
If you wanna read how the converters work & why 4 of them were used on our Foxbodys,click the following link then scroll down to the
" Theory Of Operation " Catalytic Converter " section
Once upon a time I had a 5.0 90LX and when I bought it it had a cat less bbk x pipe. The cabin smelled like a gas pump but I lived with it for a year until I had to get it inspected. I took it to a local muffler shop and they welded two magnaflow "high flows" ( one per side) to the bbk x. The smell was gone and I passed the sniffer. It was a tad quieter but it wasn't any slower.
With my 95 I had a shop remove the "pre cats" and add "high flow" aft cats to the stock h pipe. It sounds nice, makes decent power, and passes inspection.
I have Mac shorties, a catless H pipe and a Mac cat back system with flow master cats welded in. Big difference in the smell. I think magna flow cats are better but they are more money. I picked up my flow masters on Craigslist 100 bucks for the pair new..
See that's what I was thinking about doing but the ca legal flowmaster cats are 218 a piece... If that's the case then I might as well take my pipe off, sell it, and by the catted tru x pipe from magnaflow for about $500
All of the aftermarket pipes that come with converters uses just 2 converters.There are two steps in the catalytic process,reduction & oxidation.The stock hpipe uses 2 converters on each side because the first converter done the reduction process & the second converter done the oxidation process.On the aftermarket catted x/hpipes,one converter(on each side) takes care of both the reduction & oxidation process.If you look at the catted xpipes available,youll notice they all come with the air tube welded into the pipe(before the cat)or its welded into the side of each converter,so you can connect the smog pump/thermactor system to it.The extra air from the smog pump is needed to keep the converters from clogging.The only problem I see, with you welding converters in place,is to figure out a way to weld a tube in place or buy converters that has a tube welded on already. Im sure somebody will chime in shortly with more info.Some guys might actually be running the converters without the smog pump & if so,maybe they can post whether theres any clogging or ill effects occurring by not running the smog pump.If thats the case,you might not have to worry about the tube,but from what Ive heard the smog pump needs to be run alongside this type of converter.
If you wanna read how the converters work & why 4 of them were used on our Foxbodys,click the following link then scroll down to the
" Theory Of Operation " Catalytic Converter " section
I removed the cat on my Ranger a couple years ago thinking it was clogged, but it wasnt.It sounds pretty rough,even with the muffler still in place.It definitely feels like Ive lost some torque down low,because its only a 3.0ltr.I doubt our Mustangs would see any torque loss,but if they did,you probably wouldn't be able to feel it anyway,like you can in a 2.3 or 3.0ltr.
Both of our foxes are are catless with just mid pipes/patch pipes between the headers and h or x pipe, depending on which one you look at. Both have Flowmasters, but only one has exhaust hooked to the muffler outlets...... if this helps and you're not living in a state that does emissions testing
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Mustang Forum
3.7M posts
229.4K members
Since 2001
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!