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#1
11-29-2006, 07:02 AM
Hummer Novice
Join Date: Nov 2006
Posts: 14
Borla improves gas mileage.
No bull****!! I bought the catback Borla system for my 05 h2 for a better sound. I did not only get a great deep sound but also went from 10.7mpg to 13.8mpg. Highly recommend the borla system, it was easily installed by me in less than 2 hours with conventional tools.
#2
11-29-2006, 07:43 AM
Hummer Messiah
Join Date: Nov 2002
Location: PDX
Posts: 2,367,817
Re: Borla improves gas mileage.
Ries & faprications.Quote:
Originally Posted by tonybud
No bull****!! I bought the catback Borla system for my 05 h2 for a better sound. I did not only get a great deep sound but also went from 10.7mpg to 13.8mpg. Highly recommend the borla system, it was easily installed by me in less than 2 hours with conventional tools.
#3
11-29-2006, 03:18 PM
Posts: n/a
Re: Borla improves gas mileage.
I installed the borla exhaust this weekend and I feel like the car drags a lot more did you experience this problem? do i need to reset my ecu or something?
#5
11-29-2006, 10:41 PM
Hummer Professional
Join Date: Feb 2003
Location: Palm Desert, CA
Posts: 470
Re: Borla improves gas mileage.
Gee, where did you get yours?
__________________
2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Dynatech long tube headers, catback,18\" Ambush w/Toyo MT\'s,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo\'s, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev Suburban Blown
1970 Trans Am balanced, blueprinted, ceramic headers, etc.
#7
11-30-2006, 12:04 AM
Hummer Authority
Join Date: Sep 2005
Location: Texas
Posts: 1,795
Re: Borla improves gas mileage.
Hey Yeti, what you are experiencing is correct. Loss of back pressure will typically cause loss of low-end torque.
Here is what I did to get some of it back. I switched over to the corsa touring exhaust which has more back pressure. Not as loud but gives me some of my low end back.
I also found that the addition of my airaid intake caused some of it too. I then put on the granatelli MAF and got some more low end back and better throttle response in lower throttle positions.
It's still does not have as much on the low end as stock, but much better than with crappy aftermarket exhaust and stock MAF in place.
ECM programmers will not help any on lwoer throttle positions as they are designed for top end performance gains. I was told they do not touch lower thottle positions so as to not affect stock gas mileage in negative way.
Quote:
Originally Posted by YETI
I installed the borla exhaust this weekend and I feel like the car drags a lot more did you experience this problem? do i need to reset my ecu or something?
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