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Ordered Kooks 1 3/4" Headers w/ Green Cats & Corsa Sport 14866

OutBurst

By OutBurst
in Engines & Drivetrain

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OutBurst Enthusiast

OutBurst

Posted
Posted

Just ordered these from MarylandSpeed - can't say enough about their customer service! I currently have an Airad MIT on my 6.2L and I don't plan on tuning but just keeping it stock. I'll have the truck dyno'd before and after install so I can provide accurate performance improvement results. Should sound good, right?

LongrangeLauber Senior Enthusiast

LongrangeLauber

Posted
Posted

Going to have to more than likely tune for the increase airflow and exhaust flow, just so you don't run lean and start melting stuff

Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

You're probably going to want to tune it. You may get a CEL even with the green cats. Also, your trims are going to be pretty much out of whack.

 

Congrats on the big purchase!

 

Sent from my SM-G930V using Tapatalk

wuznme Enthusiast

wuznme

Posted
Posted

Total waste of money if your not tuning.

 

RT

 

^^^^ This...

 

Also could create some damage to the motor. If not tuning cancel the order, spend a little money and remove the stock muffler, give you some noise..

Rawyzf Senior Enthusiast

Rawyzf

Posted
Posted

Wow, all the hate for not wanting a tune. Figures... :rant:

No hate, just think it's the smart and right thing to do. Your truck though, do what makes you happy.

 

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EChavez Enthusiast

EChavez

Posted
Posted

No hate, just think it's the smart and right thing to do. Your truck though, do what makes you happy.

 

Sent from my SM-G930V using Tapatalk

 

Exactly. Just information you should consider. Exhaust & intake is generally fine but once you start adding headers you don't really have a choice, you could potentially run very lean and blow your engine if you don't tune for them. You're choice though. $400-600 tune or $10,000+ engine.

wuznme Enthusiast

wuznme

Posted
Posted

LOL...

 

It's your truck and money, we're just trying to help.

 

Hey if you want to drop $3k on head to tail exhaust and not get the most out of it, go right ahead. The cat back is nothing more then a noise maker albeit a preference to all. The intake will let more air in and the headers let more air out, but the ECM won't/can't calibrate the way it should to give you a benefit of the mods you have installed.

 

On top of all that you could damage the motor, but hey it's your truck.

markreed Enthusiast

markreed

Posted
Posted

My truck leaned out more than I was comfortable with just the MIT. Headers could lean to the point where you MAF is unable to compensate given the stock fuel trims.

The recommendation to tune isn't being made JUST because you are leaving power on the table, but also because your closed loop fuel is going to be a little more risky than most are willing to accept.

 

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BlueCrayon Enthusiast

BlueCrayon

Posted
Posted

Prepare for it to be loud! I put the 14866 on my 6.2L a few weeks ago with no headers and man it barks...especially when you first start it. I don't even like to get on it hard around town anymore because I'm afraid I'm going to get a ticket.

Went to my friends last night to watch football and parked on the street, left at midnight and went I left, woke everyone up in the house nextdoor!

Absolutely love the sound though

TJay74 Senior Enthusiast

TJay74

Posted
Posted

 

Not quite a 'rookie' there buddy...

 

No quite doing it like a seasoned modder either. You are going to get pre catalyst efficiency codes that will need to be tuned out, no way around that at all. Changing the position of the cats can affect the warm up times before the cats start to work, that will trip the post cat efficiency codes as well. As said as well, even though the truck uses a MAF and it has some ability to correct fueling for airflow changes it cant compensate for a set of headers.

 

If you are going to baby it all the time you will be fine, but if you plan on stepping on it you are going to be risking some damage to the motor for sure. I bet install only you will only pick up around 10rwhp with the change and will be leaving around 25rwhp on the table from not tuning.

 

As said though, your truck. I don't make the payment on it so it doesn't bother me what you do to it.

OutBurst Enthusiast

OutBurst

Posted
  • Author
Posted

 

No quite doing it like a seasoned modder either. You are going to get pre catalyst efficiency codes that will need to be tuned out, no way around that at all. Changing the position of the cats can affect the warm up times before the cats start to work, that will trip the post cat efficiency codes as well. As said as well, even though the truck uses a MAF and it has some ability to correct fueling for airflow changes it cant compensate for a set of headers.

 

If you are going to baby it all the time you will be fine, but if you plan on stepping on it you are going to be risking some damage to the motor for sure. I bet install only you will only pick up around 10rwhp with the change and will be leaving around 25rwhp on the table from not tuning.

 

As said though, your truck. I don't make the payment on it so it doesn't bother me what you do to it.

 

It's funny how the GM Performance Engineers I spoke with didn't have an issue with this - they do it all the time.

 

Ohh yeah, also had a good conversation with the head mechanic at my local dealership and he didn't mind it at all.

 

You guys are so brainwashed on these forums by vendors. Anyone can sit there and put out a 'tune.' Hell, the majority of the 'tunes' out there are open source!

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