Who’s running cats?

James K · Sep 7, 2019

Who’s running cats?

I’m tired of my car stinking. When I bought it the smog pump was gone. Needed a new H pipe so I got cheap and just picked up a BBK off road.

Car is running great and some how isn’t giving me a check engine light.

I would like to get some weld in cats but I don’t want to get a smog pump and all that. Everything for it is completely gone.

Any suggestions?

Mstng93SSP · Sep 7, 2019

I also hate the smell without cats. I welded in some high flow cats about 6 years ago on one of my foxes. Car has no smog pump and I have had no issues with this setup. I also have no exhaust stink.

James K · Sep 7, 2019

Thanks, I did some searching around and it was looking like people said they would clog with no air pump.

I drive the car about 1,000 miles a year.

Any suggestions on what cats to get? Any weld in high flow ones are good?

Thanks

a91what · Sep 7, 2019

Flowmaster high flow cats will not clog without the air pump. They are not like the cats of old. I have the part# for them at the house if I remember I will update with the number.

Mustang5L5 · Sep 7, 2019

I run stock cats with smog pump right now, but after I perform my engine work this winter, I’ll be running a Bassani catted X-pipe.

I wasn’t able to get a straight answer from Bassani on if I needed the smog pump or not, but these 5.0 engines aren’t modern and don’t burn as cleanly so since this cat pipe wasn’t cheap, I plan to keep the smog pump but reroute the plumbing into the fender and down to the mid pipe.

a91what · Sep 7, 2019

As long as you are idling at stoic afr... then no smog pump is needed.

revhead347 · Sep 7, 2019

I still have no cats, but I am also getting sick of the smell. One of my friends put the new spiral wound cats on his car. They are supposed to be almost back pressure free.

Something like this I believe.

https://www.summitracing.com/search/product-line/magnaflow-universal-spun-catalytic-converters

Kurt

a91what · Sep 7, 2019

Flowmaster part # 2230125

James K · Sep 7, 2019

That’s exactly what a looking for @a91what

Now I need to find someone to let me borrow a tig welder

deathb4dismount · Sep 8, 2019

lmr sells them in a pair for 120

Onefine88 · Sep 8, 2019

I too got tired of the stink while driving my uncatted vert. It also stunk up the garage after a drive. I had a pair of the above mentioned universal catts welded into my UPR offroad xpipe. Got them from LMR. Fixed the smell issue. It did quieten it down just a tad but it still sounds just fine.

Potomus Pete · Sep 8, 2019

I have no cats , and no smell . I have an old Diablo chip. What smell is it rotten eggs or exhaust gas.

Onefine88 · Sep 8, 2019

Potomus Pete said:
I have no cats , and no smell . I have an old Diablo chip. What smell is it rotten eggs or exhaust gas.

For me it was raw exhaust gas smell.

revhead347 · Sep 8, 2019

Potomus Pete said:
I have no cats , and no smell . I have an old Diablo chip. What smell is it rotten eggs or exhaust gas.

Diablo chip, that's a name I haven't heard in awhile. My salesman at Steeda was a guy named Nick Spinelli. Apparently he left to go work for Diablo. Diablo never had a great reputation in the business. If you have no smell, it's probably because that old chip is running the engine a little lean. I bet my JMS chip is older though.

Kurt

mattmm04 · Sep 8, 2019

I have a 01 Cobra I bought from a guy over a month ago and had a heavy fuel smell. Found fuel tube gasket was broken replaced it but still had raw exhaust gas fuel smell. Had codes for o2 sensors so went to change the front ones and found that the car had pro chamber with a cat delete. Car has some black smoke roll out the exhaust pipes after heavy acceleration and been wondering if it's because of the cat delete. I changed the oil when I brought car home as I do with all vehicles I buy used and just give everything a once over to check for potential problems. Compression check turned out great and I've driven the car roughly around 1,000 miles since I've changed the oil and levels are still on the mark as it was when I changed the oil. Haven't pulled the valve covers but wondering if it's the valve guides letting some oil by into the valves or it's just having no cats that's giving me this smoke. Driving the car with the windows down isn't bad as it was since I got a SCT tuner but still some smoke also but not as much it use to be. Any thoughts on this? Been thinking of buying some used heads and having them reworked and putting a few more dollars into them for better quality hardware if the issue is bad valve guide seals. I think I can deal with the exhaust smell as it's not overwhelming as long as I know that the engine is healthy.

89 Saleen#455 · Sep 8, 2019

a91what said:
Flowmaster part # 2230125

Flowmaster Part # 2230125 is constructed with ceramic substrate
Flowmaster Part# 2000125 is constructed with metallic substrate and flows slightly better than ceramic and it's designed to handle high horsepower applications.

a91what · Sep 8, 2019

Yeah I'm not making maximum effort horsepower or paying over 100 for each cat...

nickyb · Sep 8, 2019

I got two outta four cats,all the smog stuff,long tube headers and loudmouth catback.I pass Nevada sniffer test every year since 2007, I drive 150 miles a week.

General karthief · Sep 9, 2019

mattmm04 said:
I have a 01 Cobra I bought from a guy over a month ago and had a heavy fuel smell. Found fuel tube gasket was broken replaced it but still had raw exhaust gas fuel smell. Had codes for o2 sensors so went to change the front ones and found that the car had pro chamber with a cat delete. Car has some black smoke roll out the exhaust pipes after heavy acceleration and been wondering if it's because of the cat delete. I changed the oil when I brought car home as I do with all vehicles I buy used and just give everything a once over to check for potential problems. Compression check turned out great and I've driven the car roughly around 1,000 miles since I've changed the oil and levels are still on the mark as it was when I changed the oil. Haven't pulled the valve covers but wondering if it's the valve guides letting some oil by into the valves or it's just having no cats that's giving me this smoke. Driving the car with the windows down isn't bad as it was since I got a SCT tuner but still some smoke also but not as much it use to be. Any thoughts on this? Been thinking of buying some used heads and having them reworked and putting a few more dollars into them for better quality hardware if the issue is bad valve guide seals. I think I can deal with the exhaust smell as it's not overwhelming as long as I know that the engine is healthy.

you are not gonna get much advice on your particular issues here in the fox forums, our cars are not as intricately controlled as your car is. Post your issue in the sn95 tech forums to get relevant advice

mattmm04 · Sep 14, 2019

General karthief said:
you are not gonna get much advice on your particular issues here in the fox forums, our cars are not as intricately controlled as your car is. Post your issue in the sn95 tech forums to get relevant advice

Ah.. I see now. Didn't see that this was the fox forums. Sorry guys

Who’s running cats?

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