If he lives here in Southern California he could drive on summers all year long. A normal winter day in my zip code(90020) is high in the mid 60's and low in the high 40's.

Gotcha. Can't wait for results. Do you know which header he has installed?

http://i1118.photobucket.com/albums/...i/4d320c20.jpg
No tune needed ... K&n and unbolt muffler

Also just pushing the sport switch is huge no more hump on graph

What?

In theory yes, however once you are in closed loop operation the sub routines become a nightmare, a little change here, effects way over there type of situations. It takes time, gas, more time, and more gas. The O2 sensors are always aiming for stochimetric when under closed loop operation, now one could change the load change over point in the cruising areas, say 1500 to 2500 RPM, loads 20-40 to drop closed loop, then the ECU will revert back to fuel calculations instead of O2 feedback, then you can truely gain economy say 3 to 5 mpg, but there is a risk even in this because you will be running the engine at higher operating conditions due to the lean AFR, so CATS start breaking apart, cooling systems start to fail... you get the idea

G

Hmm... 18 whp from a tune on a NA car is pretty spectacular.



Interesting.

Even if you completely avoid the 1.05-1.15 equivalence range where the temperature is greatest? When it switches to open loop the fuel trims are still there, and at 50% load even running a bit lean isn't a big deal, at which point you tell it to switch to stoichiometric and everything is all good. At 18:1 (1.2 equiv) you're at about the same peak temperature as stoichiometric.

It's possible to go much higher but at that point you'd need to be really adjusting timing too, and it would be much harder to figure out the corrected throttle position for the same requested torque level.

No I just use all seasons all year long.

at 18 to 1 detonation is an issue unless you adjust the timing, correct, but you also have to worry about pre ignition, I don't know if the cylinder head has a proficient design to avoid this.

Read read read.. Smoothing 5 is not the industry standard lol

John

I guess it depends on your definition of industry standard... but setting a Dynojet to smoothing 0 and "STD" correction factor almost always gives the highest peak numbers

Graph wasn't choppy to need smoothing.

Changing from sae or std didn't change the delta

I'm interested in the delta not peak numbers

John

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