To use cat deletes or not? - Mustang Evolution

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Old 11-02-2012, 03:40 PM   #1
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To use cat deletes or not?

I have bbk cat deletes because I got them for 50 off eBay. I heard a lot of people don't like them and they don't work good...? So what should I do?
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Old 11-02-2012, 06:53 PM   #2
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I love mine. They work great.
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Old 11-02-2012, 07:23 PM   #3
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I don't regret putting mine on. Go for it. It's an easy install too.
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Old 11-02-2012, 07:42 PM   #4
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I heard you have to weld or they leak is that true ?
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Old 11-02-2012, 07:45 PM   #5
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Quote:
Originally Posted by Mustang32Bill View Post
I heard you have to weld or they leak is that true ?
I only had problems with mine because I had an aftermarket exhaust and of course they leaked because they didn't match up correctly. Wasn't a big deal to me as I don't intend on changing my exhaust again (3" catback) so I just had them welded to my exhaust and I love them. If you have stock diameter exhaust they shouldn't give any big issues.
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Old 11-02-2012, 10:49 PM   #6
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Mine did leak a little, the ball flange on the BBK delete pipes seemed to be too large for the stock H pipe. The clamps wouldn't cover them enough and they leaked, so I just got them welded up.
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Old 11-02-2012, 10:55 PM   #7
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I wonder if they would have seated better if you ran it for awhile? My buddies header had a leak at the ball connection and it went away after about two weeks. Either that or everyone got used to the sound lol.
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Old 11-03-2012, 08:56 PM   #8
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I too was thinking about getting some BBK cat deletes. I was wondering on the fitment since ive heard some bad things about it.
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Old 11-03-2012, 11:27 PM   #9
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Do you need a tune if you get bbk cat backs?
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Old 11-03-2012, 11:37 PM   #10
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Quote:
Originally Posted by OzzyLiriano
Do you need a tune if you get bbk cat backs?
Nah but a tuner will clear the code on your dash so you don't have to look at the light
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Old 11-04-2012, 12:11 AM   #11
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Quote:
Originally Posted by Mustang32Bill

Nah but a tuner will clear the code on your dash so you don't have to look at the light
Doesnt it come with the sensor inside? The bbks? On am?

---------- Post added at 11:11 PM ---------- Previous post was at 11:11 PM ----------

Quote:
Originally Posted by OzzyLiriano

Doesnt it come with the sensor inside? The bbks? On am?
Sorry im asking so much but its a cheap mod that im interested
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Old 11-04-2012, 12:15 AM   #12
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Quote:
Originally Posted by OzzyLiriano

Doesnt it come with the sensor inside? The bbks? On am?

---------- Post added at 11:11 PM ---------- Previous post was at 11:11 PM ----------



Sorry im asking so much but its a cheap mod that im interested
It has the holes for the o2 sensors but it still throws a code and your check engine light will go on. That's why I'm waiting to install mine when I have a sct tuner so I can clear the code
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Old 11-04-2012, 12:54 AM   #13
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So basically im putting my warranty at risk?

---------- Post added at 11:53 PM ---------- Previous post was at 11:52 PM ----------

Quote:
Originally Posted by Mustang32Bill

It has the holes for the o2 sensors but it still throws a code and your check engine light will go on. That's why I'm waiting to install mine when I have a sct tuner so I can clear the code


---------- Post added at 11:54 PM ---------- Previous post was at 11:53 PM ----------

Quote:
Originally Posted by OzzyLiriano
So basically im putting my warranty at risk?

---------- Post added at 11:53 PM ---------- Previous post was at 11:52 PM ----------
And i cant take it off with the devices sold tp clear that?
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Old 11-04-2012, 01:57 AM   #14
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What is the hp gain btw?
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Old 11-04-2012, 04:34 AM   #15
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With a catback no tune is needed. Since you're not removing the catalytic converters it will not throw a cel code, nor will you see much if any gains, at best like 4 hp, but I wouldn't even count on that. Didn't you just get that rear valence and GT500 mufflers?
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Old 11-04-2012, 05:03 AM   #16
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Quote:
Originally Posted by GrabberBlue5.0
With a catback no tune is needed. Since you're not removing the catalytic converters it will not throw a cel code, nor will you see much if any gains, at best like 4 hp, but I wouldn't even count on that. Didn't you just get that rear valence and GT500 mufflers?
Yup i did, im a bit confused on those bbk functions, i thought you can remove the cats with no tune and is replaced by bbk
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Old 11-04-2012, 05:08 AM   #17
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Quote:
Originally Posted by OzzyLiriano

Yup i did, im a bit confused on those bbk functions, i thought you can remove the cats with no tune and is replaced by bbk
Ah, I'm following you. A cat back is usually an exhaust starting with the midpipe (after the cats) and going all the way back, hence catback.

You're talking about the cat deletes right? If that is what you're talking about then you will have to tune, or just allow your vehicle to dump buttloads of fuel into your exhaust and leave the cel on. On models before ours there was a small sensor you could plug into the o2 harness to turn off the cel but in our vehicles a tune is required.

If you remove cats you will need a tune, and this is good for ~15 hp
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Old 11-04-2012, 05:15 AM   #18
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Quote:
Originally Posted by GrabberBlue5.0

Ah, I'm following you. A cat back is usually an exhaust starting with the midpipe (after the cats) and going all the way back, hence catback.

You're talking about the cat deletes right? If that is what you're talking about then you will have to tune, or just allow your vehicle to dump buttloads of fuel into your exhaust and leave the cel on. On models before ours there was a small sensor you could plug into the o2 harness to turn off the cel but in our vehicles a tune is required.

If you remove cats you will need a tune, and this is good for ~15 hp
So basically i cant do anything else to my exhaust setup for now that will require a perfromance tune except the bbks correct?
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Old 11-04-2012, 07:35 PM   #19
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yea if you went with a catback setup you'd be fine but if you run the cat deletes you will need a tune
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Old 11-04-2012, 07:38 PM   #20
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I keep hearing mixed opinions about the bbks, that some have fried theyre 02 sensors if you dont tune it, im just going to wait till do my full exhaust
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Old 11-04-2012, 07:47 PM   #21
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that would be your best bet ozzy!
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Old 11-04-2012, 07:56 PM   #22
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Quote:
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I keep hearing mixed opinions about the bbks, that some have fried theyre 02 sensors if you dont tune it, im just going to wait till do my full exhaust
If you use the cat delete pipes, it won't matter if the rear o2's are fried because you don't need them for anything, other than keeping the check engine light off. The front and rear o2 sensors are the same part #, so essentially you could just plug off the bungs in the cat delete pipes and have a spare pair of o2 sensors.

Waiting to do the full exhaust is an option if you're installing headers. Because then your tune would need adjusting vs not having headers. If you're just planning to do cat deletes and exhaust after those, then there's really no need in waiting unless you just want to do it all at once. The tune won't change because of that.
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Old 11-04-2012, 09:15 PM   #23
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So basically i can order them or just weld a pipe aswell right? Im sure i can do a similar pipe myself honestly, i work with metal sculptures, this should be easier
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Old 11-05-2012, 06:11 AM   #24
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So basically i can order them or just weld a pipe aswell right? Im sure i can do a similar pipe myself honestly, i work with metal sculptures, this should be easier
Ya you could just make one yourself. There's really no difference
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Old 11-05-2012, 02:44 PM   #25
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You could also just unbolt your stock cat pipes and get a hammer/prybar and break all of the catylist out and then bolt them back up. No money spent on exhaust and no leaking pipes after the cats to weld up. Just another thought.
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Old 11-05-2012, 02:50 PM   #26
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Delete cats with tune = good
Cat delete without tune = bad
You will be running rich and be wasting more gas, and won't get performance gains.
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Old 11-05-2012, 07:03 PM   #27
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Originally Posted by CorDog009
You could also just unbolt your stock cat pipes and get a hammer/prybar and break all of the catylist out and then bolt them back up. No money spent on exhaust and no leaking pipes after the cats to weld up. Just another thought.
My uncle told.me that, i thought that sounded mad retarded lol, i guess i can try that
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Old 11-05-2012, 08:41 PM   #28
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Delete cats with tune = good
Cat delete without tune = bad
You will be running rich and be wasting more gas, and won't get performance gains.
It won't be running rich without the tune, but you'll smell the unburnt fuel that is normally burnt by the cats. The front o2's send the signal to the computer for air/fuel adjustments and aren't affected.
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Old 11-05-2012, 08:50 PM   #29
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Quote:
Originally Posted by CorDog009

It won't be running rich without the tune, but you'll smell the unburnt fuel that is normally burnt by the cats. The front o2's send the signal to the computer for air/fuel adjustments and aren't affected.
Wow we seriously need pne correct response, you guys have me crazy lol
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Old 11-05-2012, 09:04 PM   #30
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Lol. Sorry. The simple version:

Front o2's=air/fuel
Rear o2's=only tell computer if cats are working.
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Old 11-05-2012, 10:11 PM   #31
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Lol. Sorry. The simple version:

Front o2's=air/fuel
Rear o2's=only tell computer if cats are working.
Sounds right to me!
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Old 11-06-2012, 07:35 AM   #32
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whatever cat deletes u get try and match the name brand of your midpipe. just to play it safe. If not, and you dont want to weld because of emission laws, then use the clamps and use blue silicone high temp sealant that connects deletes to midpipe.
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