until a tuner who has been into and knows what the factory is commanding at wot as far in the ve and pe tables we wont know. i do not have access to the software any longer so im in the blind.
i cant see them commanding or at least needing to command a lot of timing. at 11 to one stock with the vvt i would assume that cranking pressure is pretty much high. to build low end torque.
hell most other makes only need about 24-26 degrees tops. thats at wot and usually all in pretty fast. the modern cyl heads are pretty efficient in that they do not need alot of wot timing.
in the past at my shop the several hundred cars we put on the rollers had no change or not enough change in hp and trq to justify the use of straight 100-103 octane fuels. now that changed when the tuner started to add timing and changed the pe and ve tables. allowing the motor to take advantage of the fuel.
as far as a gain in fuel mpg? i would say a straight tank of 100 would prolly do that. in fact a tank full of 93 octane would also do it if it did not have the e10-e15 blend. but i think that type of fuel is a dying breed.
i cant see them commanding or at least needing to command a lot of timing. at 11 to one stock with the vvt i would assume that cranking pressure is pretty much high. to build low end torque.
hell most other makes only need about 24-26 degrees tops. thats at wot and usually all in pretty fast. the modern cyl heads are pretty efficient in that they do not need alot of wot timing.
in the past at my shop the several hundred cars we put on the rollers had no change or not enough change in hp and trq to justify the use of straight 100-103 octane fuels. now that changed when the tuner started to add timing and changed the pe and ve tables. allowing the motor to take advantage of the fuel.
as far as a gain in fuel mpg? i would say a straight tank of 100 would prolly do that. in fact a tank full of 93 octane would also do it if it did not have the e10-e15 blend. but i think that type of fuel is a dying breed.