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Adding Performace to the Silverado/Sierra


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Hi! I own a 2014 Chevrolet Silverado LTZ. I love it so much I've added a pro comp level lift kit and a K&N cold air intake(aircharger). I was just wondering if anyone else had good upgrade recommendations or modifications. I already know about performace chips and new exhausts/mufflers but please recommend any brand if so.

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  • 2 weeks later...

i have the diablosport i2030 tuner on my truck. while i have only ran on on the fuel mileage set up with a few tweaks here and there. it seems to have a little bit more pep and definitely better throttle response.

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  • 5 weeks later...

Following. Also, would these mods void the warranty? I have a 14' Sierra with 5.3

They will find a way especially with bolt on's.

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They will find a way especially with bolt on's.

Although I don't have factory warranty but I do have an extended warranty through a private company. Plus I've got a good friend who works for a popular auto shop who wouldn't report any mods.... :cold:

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I've always modified in some form. With my 14 I was happy with the way it ran on E-85. I bought a hypertec raised my shift points, my top end abit, lower TM to 50 percent, got rid of the V-4 for a good exhaust sound. The 18 months and 30K miles I had it was a joy.

 

 

Sent from my iPhone using Tapatalk

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K&N open style air intakes are likely hurting performance regardless of mfg. claims or tests done on private dynos with the hood up and a giant fan blowing on the front. The issue lies with IATs (intake air temperatures). There is a reason OEMs trap air filters in an enclosed box with a tube going to the fender or grille or have a true cold (read: OUTSIDE the engine bay) air intake (like 98-02 Camaro SS).

 

Since the LS1, GM has generally included relatively high compression ratios in the small block. They are able to get away with 10:1+ ratios because of ECMs that auto-trim back the timing and other parameters when potentially damaging environments appear. High IATs are one of them. I haven't scanned my truck tune yet, but on my Camaro, GTO and Corvette, right around 86 degrees F of air intake temperature, the ECM will start dialing back timing. A few degrees more you're at -3 or more degs of timing. That can be about 3-5HP per degree of timing on an average engine. You can adjust the tune to compensate, and there is some wiggle room, but generally all you're are doing is inviting engine damage. Hot air doesn't make power. It breaks stuff.

 

"CAI" is one of the most misleading terms in the hotrod world. True cold air comes from outside the sweltering engine bay. Most of them are really HAIs.

 

$.02c

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K&N open style air intakes are likely hurting performance regardless of mfg. claims or tests done on private dynos with the hood up and a giant fan blowing on the front. The issue lies with IATs (intake air temperatures). There is a reason OEMs trap air filters in an enclosed box with a tube going to the fender or grille or have a true cold (read: OUTSIDE the engine bay) air intake (like 98-02 Camaro SS).

 

Since the LS1, GM has generally included relatively high compression ratios in the small block. They are able to get away with 10:1+ ratios because of ECMs that auto-trim back the timing and other parameters when potentially damaging environments appear. High IATs are one of them. I haven't scanned my truck tune yet, but on my Camaro, GTO and Corvette, right around 86 degrees F of air intake temperature, the ECM will start dialing back timing. A few degrees more you're at -3 or more degs of timing. That can be about 3-5HP per degree of timing on an average engine. You can adjust the tune to compensate, and there is some wiggle room, but generally all you're are doing is inviting engine damage. Hot air doesn't make power. It breaks stuff.

 

"CAI" is one of the most misleading terms in the hotrod world. True cold air comes from outside the sweltering engine bay. Most of them are really HAIs.

 

$.02c

THIS.

 

most CAI's are crap and will lose power over the stocker. the stock "CAI" on vehicles nowadays are very well designed and made to achieve the most mpg and power from them. no sense in swapping it out unless your going for looks

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What about placing a drop in k&n air filter in the stock oem box? Does that make a difference compared to a paper air filter?

K&N wants you to think so.

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K&N wants you to think so.

The stock filter is about 1.5 inches thick. The k&n is about .75 inches or half the stock filter. Don't have a clue if it changes anything but one would think it could breath a little better.

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