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Gains from E85 (ethanol) on an N/A bolt on 370Z

Originally Posted by Chuck33079 Right. So if someone is claiming the same, if not 1-2 miles per gallon improvement, they are in error since it would not be possible to

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Old 09-22-2015, 11:30 AM   #1 (permalink)
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Right. So if someone is claiming the same, if not 1-2 miles per gallon improvement, they are in error since it would not be possible to get the same mileage on a fuel that has less energy by volume. Maybe he's looking at the mpg gauge which is now wrong due to different injectors?

I'm also unclear how someone can claim a power improvement from going to E85 without any timing adjustments. Can someone explain how that works? I'm at a loss.
if you just switch to e85 without a tune, you won't make any power. with the correct tune you are supposed to make power... not sure how other than it's higher octane rating than 93.
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Old 09-22-2015, 11:53 AM   #2 (permalink)
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if you just switch to e85 without a tune, you won't make any power. with the correct tune you are supposed to make power... not sure how other than it's higher octane rating than 93.

That's what I thought as well, but someone in here is claiming that he saw a power increase with zero timing changes. I was under the impression that the additional power from an E85 tune came from the additional timing you could run.
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Old 09-22-2015, 11:57 AM   #3 (permalink)
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That's what I thought as well, but someone in here is claiming that he saw a power increase with zero timing changes. I was under the impression that the additional power from an E85 tune came from the additional timing you could run.


i'm in the process of getting gtr injectors and then setting up a tune and i'll see what i gain. right now im at 324, but i've heard that the dyno at z1 reads high and i'm going to a different place this time.
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Old 09-22-2015, 02:10 PM   #4 (permalink)
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i'm in the process of getting gtr injectors and then setting up a tune and i'll see what i gain. right now im at 324, but i've heard that the dyno at z1 reads high and i'm going to a different place this time.
The OP has OEM injectors so the gauge should read right as it goes off of injector duty cycling. I'd personally stick with Z1, good to be on the same dyno! I'm betting now Jon does have tuning secrets but remember they read "high" because they use 5th and STD. Ask him to do a run in 4th and SAE. I'm betting you come down to about 309 as that's what others use. The last 370z I tested with my ported parts made 324 in 5th SAE. He had ported TB, upper and lower, FI lth and CBE and gen 3 CAI. in 4th he only put down 316. I'm guessing since you don't have ported stuff the dynojets read about the same and not reading high, it's just what you run and correct for is all.
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Old 09-22-2015, 02:23 PM   #5 (permalink)
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The OP has OEM injectors so the gauge should read right as it goes off of injector duty cycling. I'd personally stick with Z1, good to be on the same dyno! I'm betting now Jon does have tuning secrets but remember they read "high" because they use 5th and STD. Ask him to do a run in 4th and SAE. I'm betting you come down to about 309 as that's what others use. The last 370z I tested with my ported parts made 324 in 5th SAE. He had ported TB, upper and lower, FI lth and CBE and gen 3 CAI. in 4th he only put down 316. I'm guessing since you don't have ported stuff the dynojets read about the same and not reading high, it's just what you run and correct for is all.
only reason i dont feel like going back to z1 is because it's almost a 2 hour drive whereas this other shop is about 40min and the other thing is cause of some idiot they don't you go to the back to see the car tuned anymore. you have to wait in the front... i believe something happened and a guy tried to sue them or something so i understand where they're coming from with that, but it's boring to sit in the lobby for 2+ hours
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Old 09-22-2015, 03:34 PM   #6 (permalink)
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only reason i dont feel like going back to z1 is because it's almost a 2 hour drive whereas this other shop is about 40min and the other thing is cause of some idiot they don't you go to the back to see the car tuned anymore. you have to wait in the front... i believe something happened and a guy tried to sue them or something so i understand where they're coming from with that, but it's boring to sit in the lobby for 2+ hours
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