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Thread: Headers and gas mileage
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12-24-2005, 04:06 PM #1
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Black on Black- 2000 Trans Am M6
Headers and gas mileage
I heard that headers cause you to get worse gas mileage. Is this true?
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12-24-2005, 04:47 PM #2
I didn't notice a difference with mine.
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12-24-2005, 06:34 PM #3
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black- 2000 nhra edition formula
didnt notice any difference
2000 nhra edition formula
a few bolt ons, 379 rwhp
11.96 @113.25
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12-24-2005, 07:49 PM #4
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414 RWHP 395 RWTQ- 00 Black Ram Air Trans Am
I am getting 1/4 tank MORE out of my car per week AFTER header/spark plug/ CB install This is with the same driving habits to and from work over the past 3 months or so. My spark plugs were over 60k on them and I had a Chokemaster muffler on my old setup, so I'm guessing the freer flowing exhaust and plugs must be helping. I fill my tank every Sunday night and for the 2 years prior to install I would be empty by Friday night or at least the check gauges light would be on. After install I have usually 1/4 tank, sometimes it sinks to around an 1/8 thugh, either way I'll take it.
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12-24-2005, 08:04 PM #5
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Black- 1998 Pontiac Trans Am
Headers wont decrease gas mileage.
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12-25-2005, 03:45 AM #6
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414 RWHP 395 RWTQ- 00 Black Ram Air Trans Am
I think the reason people say/notice a decrease is a simple one. After some peeps get a nice set of LT's they or any mod along those lines where you really notice a diff. in throttle response, well they might tend to tap into that throttle a little more then before. Ride the car harder burn some more gas, I haven't changed my driving style at all.
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12-25-2005, 01:19 PM #7
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Black- 1998 Pontiac Trans Am
Originally Posted by Hurley711
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12-27-2005, 06:00 PM #8
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Red- 2000 T/A WS6
So long as you don't alter the internal workings of any given engine, it would stand to reason that any modification to the induction or exhaust would improve airflow, thereby increasing power at any given throttle level. Read: you'd need less throttle to cruise down the highway, meaning better gas mileage.
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12-27-2005, 09:38 PM #9
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- 4 cyl colorado
Only 4 tanks so far but mileage hasn't changed.
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12-27-2005, 11:35 PM #10
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Pewter- 2001 Camaro Z28 M6
Originally Posted by goose_von
back in the day of carbed. cars, yes that statement would be true. In todays age with pcm controlled air/fuel ratio, you shouldnt lose any at all.
When i installed headers and an ory I lost tons of mileage, due to the fact of not reinstalling my front o2 sensors(didnt have extensions) once those where plugged in my gas mileage was fine still around (380 miles a tank).
Now it will smell as if you losing gas mileage cause you car will smell rich if you run an ORY. Only reason for that is because your catless so your not burning any unused fuel.
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12-28-2005, 08:00 AM #11
^^so i've seen this posted a number of times, and no matter how hard i try, i can't figure out what ORY stands for? i've gathered its something that you replace the cat with?
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12-28-2005, 08:08 AM #12
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Red- 2000 T/A WS6
Off-Road Y-pipe. Basically, it's a politically correct term for a Y-pipe that eliminates your catalytic converters.
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12-28-2005, 07:29 PM #13Originally Posted by Ric
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01-03-2006, 02:29 PM #14
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Light Pewter Metallic- 2000 Camaro SS M6
Call it the laymans' term; such a pipe does not exist in political correctness because the politically correct answer would be, at a minimum, to install more catalytic converters (at least four, but preferably eight or more) in your exhaust, never to eliminate them.
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