So perhaps the final element would be a custom tune. Different spark plugs can help, as well as maintaining proper tire pressure.

Excerpt from another forum

:just after purchasing it(HORID performance and economy) I put the cold air intake on..then a flowmaster muffler(not full exhaust) then purchased a hypertech programer for it.. INCREDIBLE difference.. no more kicking down on straight stretches of road to maintain freeway speeds AND picked up a GOB on mileage. I've hit over 26 on the freeway several times and am VERY happy with this setup. I ALSO programed it w/the performance setting as was advised. With this package you wont be dissappointed. I'm not.

 

You can achieve both goals, just not at the same time. A combination of exhaust mods, a CAI, new rocker arms and an overkill tune has netted me an average gain of just over 4 mpg (as long as I refrain from stretching my right leg) and a very noticeable improvement in performance.

 

agreed. especially on fuel injected cars you can definitely improve performance as well as mpg at the same time. on a carbed car, not so much. with a carb its always a compromise.

if he wants lew to tune it hes going to need to get a trinity or something because the predator wont work on his car. he has on 07.

Oh and if that ram air is sealed tight it should make more power than not having it. a tight ram air should generate a pound of boost at 60mph. granted its only a pound but every bit helps. whether or not it helps with your fuel mileage i think that would be hard to prove or disprove.

 

Lew tune will get rid of the DOD, adjust the injector arc, adjust shift points and more I don't even know about. He has several tune settings for performance and one for economy others for various type of fuel octanes.

I opted for the performance setting but still get an extra 3mpg (If I behave)

 

Ya it is sealed tight ...really Diablo predators will not work on an 07? I never knew that

 

yup they wont. they have a different pcm, and i also didnt realize they can adjust shift points with the predator. i didnt know they ever got the trans support for them. i thought that only the trinitys had it.

 

Lew told me his new tune would do that. I defiantly can tell the difference. The tune also got rid of the rev limiter (good or bad)

 

you have a predator and he used it to change the shift points? what rpm does your car shift at at wot? not that im doubting you or lew just that its news to me that it can be done with the predator. he removed the limiter in park and neutral or all together?