3.7L V6 O/R H-Pipes - Mustang Evolution

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Old 07-21-2013, 01:18 PM   #1
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Tune required? Maybe just unplug the battery??
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Old 07-21-2013, 01:19 PM   #2
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probably something to get rid of the engine code it may throw w/o oxygen sensors??
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Old 07-21-2013, 01:54 PM   #3
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Here's a clip of how it idles with an O/R mid pipe without a tune to compensate for the lack of cats. Very rough. This is why a tune is required, not just to keep a code from popping, but to modify parameters of the engine itself so that it runs smoothly and properly.

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Old 07-21-2013, 03:15 PM   #4
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Originally Posted by Florida3.7L View Post
Here's a clip of how it idles with an O/R mid pipe without a tune to compensate for the lack of cats. Very rough. This is why a tune is required, not just to keep a code from popping, but to modify parameters of the engine itself so that it runs smoothly and properly.

Haha thats black on black video! It isnt the O/R Hpipe thats causing a rough idle its the Steeda CAI. Its a tune required CAI with a larger intake tube so the idle was rough. My buddy has a O/R Xpipe and it runs smoothly. Its the CAI thats causing the idle.
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Old 07-21-2013, 03:23 PM   #5
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THANK YOU for the clarification. I have a no tune JLT CAI... makes me feel better about my purchase
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Old 07-21-2013, 03:24 PM   #6
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THANK YOU for the clarification. I have a no tune JLT CAI... makes me feel better about my purchase
Well technically u loss power u couldve had. The steeda has the BEST gains because it actually uses a larger intake tube. But yea u can run your Off Road mid pipe no problem!!
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Old 07-21-2013, 04:48 PM   #7
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Haha thats black on black video! It isnt the O/R Hpipe thats causing a rough idle its the Steeda CAI. Its a tune required CAI with a larger intake tube so the idle was rough. My buddy has a O/R Xpipe and it runs smoothly. Its the CAI thats causing the idle.
Ok. I thought he already had it tuned for the CAI then installed the O/R h-pipe without updating the tune. Thanks for sorting that out for me. When I installed my h-pipe, I had an updated tune ready to be loaded, so I never experienced how mine ran without the tune.
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Old 07-21-2013, 04:51 PM   #8
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Well technically u loss power u couldve had. The steeda has the BEST gains because it actually uses a larger intake tube. But yea u can run your Off Road mid pipe no problem!!
lol what? 1-2hp??? pfft I sh*t more hp than that in the morning
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Old 07-21-2013, 05:04 PM   #9
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Well technically u loss power u couldve had. The steeda has the BEST gains because it actually uses a larger intake tube. But yea u can run your Off Road mid pipe no problem!!
So when Lethal Performance says it's "tune required" on their website its only to clear the code it throws??
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Old 07-21-2013, 05:11 PM   #10
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So when Lethal Performance says it's "tune required" on their website its only to clear the code it throws??
I would imagine
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Old 07-21-2013, 05:26 PM   #11
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I would imagine
If u have any doubt u can always email LP nenita to be safe!
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Old 07-21-2013, 06:49 PM   #12
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lol what? 1-2hp??? pfft I sh*t more hp than that in the morning
Soooo u sh*t Horse Power....thats amazing

---------- Post added at 05:49 PM ---------- Previous post was at 05:49 PM ----------

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So when Lethal Performance says it's "tune required" on their website its only to clear the code it throws??
Its to clear ur Code and Fix ur Air/Fuel
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Old 07-21-2013, 08:19 PM   #13
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Soooo u sh*t Horse Power....thats amazing

---------- Post added at 05:49 PM ---------- Previous post was at 05:49 PM ----------



Its to clear ur Code and Fix ur Air/Fuel
haha I know I was excited too Charlie!! lol
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Old 07-21-2013, 11:15 PM   #14
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Originally Posted by Charlie_santos View Post

Soooo u sh*t Horse Power....thats amazing

---------- Post added at 05:49 PM ---------- Previous post was at 05:49 PM ----------



Its to clear ur Code and Fix ur Air/Fuel
Ahh ok. & the air/fuel ratio isn't off to the point of hurting the engine?
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Old 07-21-2013, 11:35 PM   #15
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Ahh ok. & the air/fuel ratio isn't off to the point of hurting the engine?
No no its okay to run dd
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Old 07-21-2013, 11:48 PM   #16
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No no its okay to run dd
Interesting!! That's good info to know bro! Would the same apply to LT headers & x pipe!
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Old 07-22-2013, 12:02 AM   #17
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Interesting!! That's good info to know bro! Would the same apply to LT headers & x pipe!
I drove my 3.7 with just long tubes no tune
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Old 07-22-2013, 12:29 AM   #18
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I drove my 3.7 with just long tubes no tune
Good info thanks!
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Old 07-22-2013, 01:08 PM   #19
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Good info thanks!
It will run rich a bit but not too rich to cause any issues
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Old 07-22-2013, 03:52 PM   #20
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It will run rich a bit but not too rich to cause any issues
Good info to know thank!
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Old 07-22-2013, 04:15 PM   #21
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It will run rich a bit but not too rich to cause any issues
run rich? sorry still adjusting to the learning curve
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Old 07-22-2013, 04:17 PM   #22
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run rich? sorry still adjusting to the learning curve
Too much fuel
It's better than running lean
Running rich will mess up your cats (which you won't have)
Running lean can (potentially) cause knock
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Old 07-22-2013, 04:22 PM   #23
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Too much fuel
It's better than running lean
Running rich will mess up your cats (which you won't have)
Running lean can (potentially) cause knock
got it! thanks for all your help guys!
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Old 07-22-2013, 07:20 PM   #24
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got it! thanks for all your help guys!
running either way, rich or lean. it will not be good for you motor in the long run. the answer to getting a x or h pipe, you would need a tuner if you are going to run catless as you need to turn the rear o2 sensors off so you dont throw a code or the check engine light stays on. catless will also make your exhaust sound raspy especially with a x pipe. then you would need to add resonators to tone it down and it also depends on what type of catback sytem you have,
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Old 07-22-2013, 08:05 PM   #25
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running either way, rich or lean. it will not be good for you motor in the long run. the answer to getting a x or h pipe, you would need a tuner if you are going to run catless as you need to turn the rear o2 sensors off so you dont throw a code or the check engine light stays on. catless will also make your exhaust sound raspy especially with a x pipe. then you would need to add resonators to tone it down and it also depends on what type of catback sytem you have,
what if I like raspy?
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Old 07-22-2013, 08:21 PM   #26
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what if I like raspy?
if you dont want your car to sound raspy, add resonators. its up to you how you want your car to sound like. that was just my 2 cents.
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Old 07-22-2013, 08:27 PM   #27
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what if I like raspy?
With no cats, 4v sounds super raspy
I heard a Shelby with an o/r x and it turned raspy after 3k
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Old 07-23-2013, 12:03 AM   #28
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With no cats, 4v sounds super raspy
I heard a Shelby with an o/r x and it turned raspy after 3k
Lol my car has a off road x and my 5.0 sounds amazing
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Old 07-23-2013, 12:05 AM   #29
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I've noticed. Even with my roush they will rasp. If i slowly tach it, they sound amazing. But sudden shifts and fast rpm ranges, they sounds kinda raspy and crackly.
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Old 07-23-2013, 12:06 AM   #30
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Lol my car has a off road x and my 5.0 sounds amazing
Still raspy unless you're flooring it
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Old 07-23-2013, 12:19 AM   #31
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Still raspy unless you're flooring it
No reving and shifting its a deep gurgle
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Old 07-23-2013, 04:24 AM   #32
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No reving and shifting its a deep gurgle
Just curious, what's your setup?
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Old 07-23-2013, 11:26 AM   #33
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Just curious, what's your setup?
Well this is on my 5.0

BBK Cat deletes
Pypes 3' X-Pipe
Resonator Deletes
And I cut down my straight piping to 1 1/4 to gain back pressure so my axlebacks are just 1 1/4 piping with tips
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