Is it possible to run long tube headers without a new tune? - Ford Mustang Forum
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post #1 of 32 (permalink) Old 06-03-2012 Thread Starter
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Is it possible to run long tube headers without a new tune?

I have a Steeda CAI installed with a BBK 90mm throttle body. Tomorrow I am having a shop install a full exhaust- Kooks long tube headers and Magnaflow competition catback with the Kooks high-flow catted x-pipe. I have a 91 octane tune for just the intake as of right now, is it safe to drive with the full exhaust without a custom tune? Should I just turn of the O2's?

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post #2 of 32 (permalink) Old 06-03-2012
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Canned tune would be fine. Bama had my tune to me in like a day. I don't know if I would run the car without it atleast knowing somewhat that the pipes or cats had been changed.


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post #3 of 32 (permalink) Old 06-03-2012 Thread Starter
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I am prepared to order a custom tune soon but will it be okay to drive for a week or two? I do not want another #8 failure from the engine running too lean. Ha
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post #4 of 32 (permalink) Old 06-03-2012
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Originally Posted by cpembach1 View Post
I am prepared to order a custom tune soon but will it be okay to drive for a week or two? I do not want another #8 failure from the engine running too lean. Ha

Keep RPMs down and don't use more than half throttle. You may get a code or two but as long as you don't put the car under heavy load, those bolt-ons will not affect you while waiting for your tune.

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post #5 of 32 (permalink) Old 06-03-2012 Thread Starter
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Originally Posted by GoT midlife CS View Post
Keep RPMs down and don't use more than half throttle. You may get a code or two but as long as you don't put the car under heavy load, those bolt-ons will not affect you while waiting for your tune.

Alright man thank you for the advice. Im thinking a mail order bama tune.
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post #6 of 32 (permalink) Old 06-03-2012
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I have a Steeda CAI installed with a BBK 90mm throttle body. Tomorrow I am having a shop install a full exhaust- Kooks long tube headers and Magnaflow competition catback with the Kooks high-flow catted x-pipe. I have a 91 octane tune for just the intake as of right now, is it safe to drive with the full exhaust without a custom tune? Should I just turn of the O2's?

First off if you can get a good custom tune from a local shop... Go for and bypass the canned tune crap...
second, you can run high flow cats without turning off the rear o2 sensors... You will get codes...
follow this link
https://www.allfordmustangs.com/forum...e-headers.html

I don't speak often but when I do, I don't have clue what I am talking about. I just repeat things that I once heard and do not repeat them correctly... My doctor told me it was an ID 10 T problem and it was incurable.
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post #7 of 32 (permalink) Old 06-03-2012
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You will get a check engine light for catalytic converter below efficiency even with high-flow cats installed. However it won't put the engine in danger by itself. What I would pay very close attention to is the Oxygen sensor wiring harness. DO NOT USE EXTENSIONS. If your headers come with extensions, throw them away. The factory harness can be extended to fit the new headers' o2 sensor location by removing a tie-down on the upper bolt of the trans bellhousing.


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First off if you can get a good custom tune from a local shop... Go for and bypass the canned tune crap...
I would take a canned tune from an experienced 5.0 tuner over a custom dyno tune from a local shop any day. The shop that dyno'd my car did not even know the 1:1 gear ratio. I am lucky to have some of the top shops with a few hour drive but not everyone can say that.
post #8 of 32 (permalink) Old 06-04-2012
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You would be safe to fire it up to move the car around your garage/driveway, but not driving it around for a week or two. Get a Tune for the headers.

Sometimes I really miss the day of being able to pop open the fuel bowl on a carb and just simply toss is some larger jets...

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post #9 of 32 (permalink) Old 06-04-2012
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@ Grimace427…
If that was your only option… I am right there with you…But if you have a local shop that specializes in Mustangs… I say a custom tune better than a canned tune any day of the week, but not in your case…

I don't speak often but when I do, I don't have clue what I am talking about. I just repeat things that I once heard and do not repeat them correctly... My doctor told me it was an ID 10 T problem and it was incurable.
So when I reply to a post or add to a thread I just find the words elsewhere and copy and paste.
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post #10 of 32 (permalink) Old 06-04-2012 Thread Starter
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Quote:
Originally Posted by JohnRichard View Post
First off if you can get a good custom tune from a local shop... Go for and bypass the canned tune crap...
second, you can run high flow cats without turning off the rear o2 sensors... You will get codes...
follow this link
https://www.allfordmustangs.com/forum...e-headers.html
I do live about 30 miles from Dallas Mustang. They quoted me 350-375 for a custom dyno tune. Would this be worth it? I already have a BAMA 93 Race tune on the way. I ordered and submitted the details of my car's modifications last night so hopefully the tune will be ready by the time the car is done later this evening...
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post #11 of 32 (permalink) Old 06-04-2012 Thread Starter
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Quote:
Originally Posted by Grimace427 View Post
You will get a check engine light for catalytic converter below efficiency even with high-flow cats installed. However it won't put the engine in danger by itself. What I would pay very close attention to is the Oxygen sensor wiring harness. DO NOT USE EXTENSIONS. If your headers come with extensions, throw them away. The factory harness can be extended to fit the new headers' o2 sensor location by removing a tie-down on the upper bolt of the trans bellhousing.




I would take a canned tune from an experienced 5.0 tuner over a custom dyno tune from a local shop any day. The shop that dyno'd my car did not even know the 1:1 gear ratio. I am lucky to have some of the top shops with a few hour drive but not everyone can say that.
Might I ask why the extensions that came with the Kooks headers are not recommended?
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@ Grimace427…
If that was your only option… I am right there with you…But if you have a local shop that specializes in Mustangs… I say a custom tune better than a canned tune any day of the week, but not in your case…
If I was spending the money on a custom high-hp build you can bet I am getting a custom tune with plenty of datalogs to make everything perfect. As far as common bolt-ons, unless the local shop is a nationally known 5.0 tuner like JPC, Lund, AED, so on, I would bet the remote tuners would be more reliable.

Quote:
Originally Posted by cpembach1 View Post
Might I ask why the extensions that came with the Kooks headers are not recommended?
Too many people have damaged or destroyed their entire engine because the connections between the extension and the O2 sensor itself were not 100%. Regardless, they are not even necessary as the factory harness will work.
post #13 of 32 (permalink) Old 06-04-2012 Thread Starter
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Quote:
Originally Posted by Grimace427 View Post
If I was spending the money on a custom high-hp build you can bet I am getting a custom tune with plenty of datalogs to make everything perfect. As far as common bolt-ons, unless the local shop is a nationally known 5.0 tuner like JPC, Lund, AED, so on, I would bet the remote tuners would be more reliable.



Too many people have damaged or destroyed their entire engine because the connections between the extension and the O2 sensor itself were not 100%. Regardless, they are not even necessary as the factory harness will work.
What would destroy the engine? The headers are being installed right now and should be done by this afternoon. You have me worried now.
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Exclamation Tune

If you already ordered your BAMA tune, then just wait and load it up when you get it. That's what I did and my car runs great. A custom dyno tune would be good as well, but for now just load the BAMA tune.

Your check will probably come on, but if its code 420 or 430 you are good to go.

Expect your gas mileage to drop

John

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post #15 of 32 (permalink) Old 06-04-2012 Thread Starter
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Quote:
Originally Posted by johncomer1 View Post
If you already ordered your BAMA tune, then just wait and load it up when you get it. That's what I did and my car runs great. A custom dyno tune would be good as well, but for now just load the BAMA tune.

Your check will probably come on, but if its code 420 or 430 you are good to go.

Expect your gas mileage to drop

John
I am so excited to hear her new purr. Also, I thought that a BAMA custom tune would prevent the light from coming on. What code would it throw and is there any way to fix it.

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