full exhaust + tune = fuel mileage? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Dexman1349 · 09-28-2013, 09:56 AM

I am looking to upgrade the full exhaust (headers, high-flow cats, & catback) along with a CAI intake and a dynotune. Any thoughts with how I should expect to see my fuel mileage change?

I would assume it would go up due to a more efficient system, but I'm not so sure with the tune.

Apex Motorsports · 09-28-2013, 10:25 AM

In theory, you are correct. In reality, you will like hearing the new sound and feeling the extra power and probably be in the throttle more than you were previously. I would not expect to see any significant change.

Bo White · 09-28-2013, 10:37 AM

The right foot mod does more for mileage than any other mod.

Dexman1349 · 09-28-2013, 10:44 AM

Quote:

Originally Posted by Apex Chase

In theory, you are correct. In reality, you will like hearing the new sound and feeling the extra power and probably be in the throttle more than you were previously. I would not expect to see any significant change.

This was basically what I was expecting.

I know we don't buy these cars for their phenomenal fuel economy, but I still do use it for my daily driver so I was hoping I wouldn't end up with a significant drop...

Avenging Orange · 09-28-2013, 02:15 PM

Didnt get to road trip this year

.......but just kickin around the city I averaged 16 mpg.

Nightmare2012 · 09-28-2013, 03:30 PM

Quote:

Originally Posted by Dexman1349

I am looking to upgrade the full exhaust (headers, high-flow cats, & catback) along with a CAI intake and a dynotune. Any thoughts with how I should expect to see my fuel mileage change?

I would assume it would go up due to a more efficient system, but I'm not so sure with the tune.

I better steer clear of this one

danl · 09-28-2013, 10:32 PM

like Chase stated above.
IF you can keep your foot out of it, and drive it like a Honda, it will actually get better mileage than stock. . .
I got Teds, JRE tune, put on a 3" cat back, deleted the resonator, w/magnaflows.
vmax TB, and K&N CIA.
it can drive better on freeway than stock for sure. 70 to 75 I can get close to 30 mpg. at 65, I can get 33-34. in town, its horrible, its just a heavy car.
BUT - I cant drive this car that normal. . . or in town.
I love the sound and acceration way to much, also by turning off the stabil a track, and traction control, it unleashes a totally different car. I can an chirp 1st and 2nd gear easily.
But gas mileage suffers. But who cares. I did not buy this car for mpg.
I wanted something as, or more potent, than my 1990 Camaro z-28.
I found it!

Denis · 09-29-2013, 08:29 AM

I have a full exhaust (long tubes, no cats, and a Corsa) with a tune and AFM turned off and noticed no significant gain or loss in MPG. on my drive from Cali to NY I averaged 25 MPG.

shibbs · 09-30-2013, 12:35 PM

With headers you'll actually end up losing some torque down below 2000 RPMs, so you may actually see a loss.

That being said, with my 2" long-tubes, no cats, CAI, and tune, I'm getting the same mileage that I was getting before.

nyrfan · 09-30-2013, 01:04 PM

Quote:

Originally Posted by Dexman1349

I am looking to upgrade the full exhaust (headers, high-flow cats, & catback) along with a CAI intake and a dynotune. Any thoughts with how I should expect to see my fuel mileage change?

I would assume it would go up due to a more efficient system, but I'm not so sure with the tune.

Wishful thinking. Any gains will be offset by your right foot enjoying your new found sound/power.

Nightmare2012 · 09-30-2013, 01:06 PM

Quote:

Originally Posted by shibbs

With headers you'll actually end up losing some torque down below 2000 RPMs, so you may actually see a loss.

That being said, with my 2" long-tubes, no cats, CAI, and tune, I'm getting the same mileage that I was getting before.

I saw no lost in torque anywhere in the power band

DallasSS · 09-30-2013, 01:31 PM

Quote:

Originally Posted by Nightmare2012

I saw no lost in torque anywhere in the power band

I was waiting (hoping) to see a comment like that.

09-28-2013, 09:56 AM	#1
Dexman1349 2010 2SS/RS M6 Drives: 2010 2SS/RS M6 Join Date: Jun 2010 Location: Auckland, NZ Posts: 1,482	full exhaust + tune = fuel mileage? I am looking to upgrade the full exhaust (headers, high-flow cats, & catback) along with a CAI intake and a dynotune. Any thoughts with how I should expect to see my fuel mileage change? I would assume it would go up due to a more efficient system, but I'm not so sure with the tune.

09-28-2013, 10:37 AM	#3
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	The right foot mod does more for mileage than any other mod. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

09-28-2013, 02:15 PM	#5
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	Didnt get to road trip this year .......but just kickin around the city I averaged 16 mpg. __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

09-29-2013, 08:29 AM	#8
Denis Drives: 2010 SS Join Date: May 2012 Location: Yorktown Heights, NY Posts: 7,695 View My Garage	I have a full exhaust (long tubes, no cats, and a Corsa) with a tune and AFM turned off and noticed no significant gain or loss in MPG. on my drive from Cali to NY I averaged 25 MPG. __________________

09-28-2013, 10:25 AM	#2
Apex Motorsports Drives: 2000 Camaro SS Join Date: Feb 2010 Location: Louisville, Ky. Posts: 25,179	In theory, you are correct. In reality, you will like hearing the new sound and feeling the extra power and probably be in the throttle more than you were previously. I would not expect to see any significant change.

09-28-2013, 10:32 PM	#7
danl Drives: 2013 JSB Camaro 2ss Join Date: Oct 2011 Location: Redlands, CA Posts: 184 View My Garage	like Chase stated above. IF you can keep your foot out of it, and drive it like a Honda, it will actually get better mileage than stock. . . I got Teds, JRE tune, put on a 3" cat back, deleted the resonator, w/magnaflows. vmax TB, and K&N CIA. it can drive better on freeway than stock for sure. 70 to 75 I can get close to 30 mpg. at 65, I can get 33-34. in town, its horrible, its just a heavy car. BUT - I cant drive this car that normal. . . or in town. I love the sound and acceration way to much, also by turning off the stabil a track, and traction control, it unleashes a totally different car. I can an chirp 1st and 2nd gear easily. But gas mileage suffers. But who cares. I did not buy this car for mpg. I wanted something as, or more potent, than my 1990 Camaro z-28. I found it!

09-30-2013, 12:35 PM	#9
shibbs Captain Gingerbeard Drives: 2012 IOM RS/SS 6MT Join Date: Feb 2013 Location: West Twin Cities, MN Posts: 2,489	With headers you'll actually end up losing some torque down below 2000 RPMs, so you may actually see a loss. That being said, with my 2" long-tubes, no cats, CAI, and tune, I'm getting the same mileage that I was getting before.