Nice, flat torque curve, almost like a turbo charged engine. Is E85 supposed to be better? I heard it's higher octane (not to be confused with the amount of octane in a fuel), but also a much lower energy fuel. (2 carbon atoms to break up per molecule versus the 8 in octane.)
E85 will make more power, here in South Florida it is very available, it is 105 octane, It does have 30% less energy by volume. The fuel mileage is lower by 10-15%, but the fuel is generally 15-20% less expensive than premium fuel.
Interesting but none of these fuels are available in beautiful so. Cali where we will get our first big winter rain in Feb.
The OEM tune in this car adapts based on fuel quality. I am very familiar with how the ignition timing logic works. Even with 93 octane fuel here, I gained 1hp by advancing the ignition timing. On 91 the gains will absolutely be less. But not nothing. The advantage of tuning is the ability to maximize modifications like exhaust, intake work, fuel changes etc.
Check the web. It's available in the bay area.. but not at many gas stations.
So I bet it's available where you live.
But before everyone goes pumping E85.
1) It may void your warranty. Generally anything over 10% ethenal voids the warranty.
2) It may not do much without a tune. Which is probably what Bill will show.. with a tune and E85 good things may happen.
Might be right. But at least he showed a mod prior to using it.
Ok do NOT go out and pump E85 in a Q50. The fuel system from factory is not adequate, in its OEM configuration I was seeing above 90% injector duty cycle. E85 needs more fuel (especially at wide open) The car is not designed for it.
With a minimum of upgraded fuel injectors and a tune, i hope to find out what the gains are shortly. Its not for everyone, but with 370z's I have seen a 20whp gain from ethanol.
that was the exact point I try to bring.. this tune is pointless if it only benefits the ppl in a small area... and ofcoz you gonna get a better chart when u r using better fuel.. just saying
This car is knock limited from factory, meaning that even with the 93 octane the car can benefit from higher octane fuel. So the power gained is NOT from increasing the ignition timing. The best gains I found were leaving that alone and taking a bit of fuel out of it and tuning the VVEL and VVT.
I would not expect 15hp on 91, but I would expect at least 1/2 of that gain. Not a lot, but not nothing. I also have done some work with faster shifting. I have done some work with my V-Box performance meter to see the gains with that.
