Will Headers Increase MPG???
#1
Will Headers Increase MPG???
Ok, on my 2003 Silverado with the 5.3L engine, its all stock except for 07 efans and a dynomax ultraflow muffler in place of the stock one, rest of the exhaust is stock.
I have a set of the pacesetter LT's and ORY here already and waiting to go on, i also bought some universal 3in high flow cats to put in the y-pipe tp make it legal, but now my truck is registered in a county that doesnt do any emmisions testing, only safety, so im thinking of just putting on the ORY as is.
My question is if everything else stays the same, and i drive the same as i do now, will the headers and ORY actually increase MPG or not really affect it? I know if i bury my foot in it its going to get worse, but with gas prices creeping up i dont want to do anything that will really take a hit in the MPG, Im going to hold off on the LS6 cam swap for now because of this.
I want to do the headers and y-pipe and a cold air intake, either the volant with the scoop or the tri power from vararam. and will probably get a tune cause i know i will see better MPG with that.
I have a set of the pacesetter LT's and ORY here already and waiting to go on, i also bought some universal 3in high flow cats to put in the y-pipe tp make it legal, but now my truck is registered in a county that doesnt do any emmisions testing, only safety, so im thinking of just putting on the ORY as is.
My question is if everything else stays the same, and i drive the same as i do now, will the headers and ORY actually increase MPG or not really affect it? I know if i bury my foot in it its going to get worse, but with gas prices creeping up i dont want to do anything that will really take a hit in the MPG, Im going to hold off on the LS6 cam swap for now because of this.
I want to do the headers and y-pipe and a cold air intake, either the volant with the scoop or the tri power from vararam. and will probably get a tune cause i know i will see better MPG with that.
#3
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i did headers/ORY and ran it untuned with the rear 02 codes on for almost a year and got 17mpg.
I installed my cam, asp pulley kit, tuned it and im now getting 22mpg still on the clutch fan. I'm lazy and havent made brackets for my efans yet lol.
I installed my cam, asp pulley kit, tuned it and im now getting 22mpg still on the clutch fan. I'm lazy and havent made brackets for my efans yet lol.
#5
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I'm already getting over 20mpg on the highway. I've had a best of 25mpg drafting behind a beertruck going 65-70mph. But I'm only getting mid teens in town.
I'm actually looking at putting on a set of F-body Mac midlength headers with ORY. Supposedly my rear O2s have been deleted already.
I'm actually looking at putting on a set of F-body Mac midlength headers with ORY. Supposedly my rear O2s have been deleted already.
#6
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When I put an audio system in my truck(2006 silverado 5.3-sold two months ago) It gave me the best MPG I ever got because I would mess with the stereo so much and it was so freaking loud that I would keep my foot "OUT OF IT"!!! Always in cruise mode HAHAHA I was pushing 17.5-18mpg in the city and the freeway 21-23mpg Good luck with your mods.....