Will longtubes and ory help gas mileage?
09-01-2005, 05:18 PM
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Will longtubes and ory help gas mileage? Will longtubes and ory help gas mileage? I heard that longtubes tend to make our cars run rich, wouldn't this decrease mileage? 
09-01-2005, 05:56 PM
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i would say the off road race headers and off road y pipe would be best on gas milage. most headers flow about the same unless ur spending a fortune. and i think he's right on the tune no matter what headers w/o a tune. i guess keeping cats and the o2's behind the cats might keep the AFR more stable though.
09-01-2005, 05:59 PM
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Once you have the car tuned correctly, headers will actually increase fuel economy slightly because of decreased pumping losses.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
09-02-2005, 12:32 AM
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I noticed very nice MPG increase at the time of my Mac/ORY install. The car was not completely tuned, but I would think anything that would increase the breathing efficiency of the engine would also increase gas milage.
Well, maybe not heads/cam...but removing restrictions
-Doug
Well, maybe not heads/cam...but removing restrictions
-Doug
09-02-2005, 07:56 AM
#7
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Originally Posted by memphisTa
Will longtubes and ory help gas mileage? I heard that longtubes tend to make our cars run rich, wouldn't this decrease mileage?
YES/NO
It all depends how you drive it. If you drive as hard as you where before then it WILL use more fuel. However as you will see a gain in BHP you will not need to drive as hard to acheive the same performance so you may in fact see no loss or even a slight gain.
An easy way to visulise it.
When the VW Golf was launched it had a 4 speed 1.6 litre engine. VW upgraded this to a 1.8 and a 5 speed. Logic would suggest the larger engine would use more fuel. However becuase the 1.8 produced more power it got 5 gears meaning you didn't have to drive it as high in the rpms as often, the result was a significant leap in fuel economy.
