PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Horrid gas mileage

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Old 05-27-2007, 06:30 PM
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Default Horrid gas mileage

My last 2 tanks i got 11 mpg on my cammed full bolt on ls1.

But basically, I got my VE and MAF right on the spot with a wideband. Im commanding 12.8 richened to 12.6 through pe. I havent been driving that crazy.

It seems like there are quite a few people getting better than this with similar setups. I am going to give closed loop + reenabling dfco a shot.

Car is completely tuned up as well.

Bottom line, i don't expect to be getting awesome gas mileage because after all it is a cammed sports car but i think 11 is a little low. Id be more than happy with 15.
Old 05-28-2007, 02:27 PM
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Might check your idle. That's been my problem--running too rich there. I'm getting 14-15 in mostly city driving though--similar set-up as yours.
Old 05-28-2007, 10:05 PM
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lol i get 13 with just a lid/cutout in city, i dont get how you guys get awesome mileage in the city with the mods you have.
Old 05-28-2007, 11:04 PM
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Originally Posted by pHEnomIC
My last 2 tanks i got 11 mpg on my cammed full bolt on ls1.

But basically, I got my VE and MAF right on the spot with a wideband. Im commanding 12.8 richened to 12.6 through pe. I havent been driving that crazy.

It seems like there are quite a few people getting better than this with similar setups. I am going to give closed loop + reenabling dfco a shot.

Car is completely tuned up as well.

Bottom line, i don't expect to be getting awesome gas mileage because after all it is a cammed sports car but i think 11 is a little low. Id be more than happy with 15.
Do you have any Data logs to share?




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