tightdogal

I like the handheld tuners so I can be able to just tune it myself. IE When I want to use it as a daily driver, use my OEM tune, but when I head to the track, use a 93 octane tune.

MU71L4710N

That's dumb. The 93 tune should be your daily driver tune you get better gas mileage that way

cliffyk

Another issue is that you really should run at least one full tank (preferably two) of 93 octane fuel through the engine before switching from a tune configured for 87 octane, to one optimised for 93.

H0SS302

Didnt read the thread, but ill say my piece.

If your gonna stay with a bolt on GT for a while, skip the intake mods entirely (IMO). For the money you will spend on a CAI and a tb/plenum(around 400-600 for top of the line parts) your going to get minimal actual RWHP out of it.

The real gains for a bolt on car are the exhaust, and a tune. Long tube headers, o/r x pipe and a straight through muffler catback and a tune (and if your really getting antsy to spend money put in a K&N filter) will net you somewhere around 30 RWHP. A full exhaust was the only mod I put on that I could actually feel. When I nailed the tune you could definitely tell that something was done to the car.

I really dont think you need to touch the intake side until you do some head work on the car.

cliffyk

I agree 110% about the CAI, however the stock upper plenum is a weak point.

Replacing it with any of the after market units and a 70mm TB can be done for $200 or so, and with an optimised tune will provide noticeable and worthwhile gains in the upper mid-range and higher rpms.

That said, without an optimised tune (or for those that never rev the engine beyond 3500 rpm) there will be little if any benefit.

tightdogal

Really? I didn't know. I would always think I'd get worse gas mileage Mmmm okay.

cliffyk

Think about it this way--why would increasing engine efficiency (which is where added power comes from) decrease fuel economy?

Fuel economy does sometimes suffer after an engine has been modified/tuned to achieve increased power, however this is almost always because the increased power has a way of making people's right foot heavier...

TRUEBLUE3934

You'll have to get at least 8% better fuel mileage just to pay for the more expensive gasoline.

The comment about running out the tank at least once, depending upon how low you run your car between fill-ups, is a good idea before switching tunes. If you mix 93 oct with some 87 oct, you certainly will not have 93 oct going into the motor.

schmallz

Why would you get worse milage if you were only increasing the octane of the fuel? Same amount of fuel, but more power is made...

You could have 93 street tune
93 Race tune
and
100 Octane Street Blaze Race tune.
Sine you want the SCT, with 3 options.

That 100 octane stuff ain't exactly cheap, but it's better than octane boosters.

cliffyk

It costs me about $4.50 extra at each fill-up to run 93 octane, about the same as a couple beers at a cheap place, worth every penny to me...