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Hey UFO, I have a Toyota 1JZ-GTE in the car, 2.5L single turbo conversion.
I took my intake cam back to 0 and my exhaust +4, with my intake at +4 is felt a little limp down low, with the exhaust at +4 I could feel a a noticeable amount of grunt 1500-2000 range, it didn't seem to really help below there.
I also pulled my a/f ratio back from 15.6:1 to 15.87. My injection times crusing at 40-50 miles an hour seemed to drop around 0.1 ms (from say 1.2 to 1.1). Im going to add another degree or two of ignition take more advantage of the lower a/f too.
My trip today was 32.5 mpg, not as good as my 34.5 mpg tank last time, but it was only 40 miles of driving, on some extreme hills (drove up and past a ski resort) I really feel with cam and a/f I stand to gain a decent improvement.
as cams rotate in the order exhaust->intake advancing the exhaust would remove overlap. I hope to have better results soon!
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