Originally Posted by Mercennarius The gains were made because of the oxygenated fuel, not because of the octane difference. Oxygenated fuels have a lower power stoichiometric and thus you have
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09-03-2009, 12:12 PM | #31 (permalink) | |
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09-03-2009, 12:31 PM | #34 (permalink) |
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And how do you know this definitively? How can you be 100% certain that higher octane didn't account for at least some of that 14whp gain? Understand, I'm not saying you're wrong. What I'm saying is that I don't know for sure one way or the other, because I have yet to see any proof. I just see a bunch of people making claims, but I see no tests to verify one way or another. What I'd like to see is a video similar to the one IP did, showing someone dumping in non-oxygenated 100-octane fuel in. If the dyno reads 0 gain, then I'll be convinced that higher octane doesn't do anything, because that's actual evidence/proof. Let me put it this way. I wouldn't accept someone's claims that mod xyz produces huge gains without seeing proof in the form of dyno results. I doubt many of us would, right? So likewise, I'm not going to accept anyone's claim that xyz produces zero gains without the same kind of proof. As far as I'm concerned, until there is proof one way or the other, the question hasn't been definitively answered and all positions are conjectural. Also, just to be clear, I did not post that video with the intent of offering it as proof that higher octane produces gains. We obviously can't say that because the fuel they used was oxygenated. My intent was only to refute the claim that race fuel in general will produce no gains in the 370Z unless the car is modified for it.
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"There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) | 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf. |
09-03-2009, 12:38 PM | #35 (permalink) |
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That's the question though, where is the sweet spot between 91-94? Why pump 94 when you can save money with 91 right?
Was never suggesting 100octane+ is beneficial for a stock 370z. Last edited by ZzzZz; 09-03-2009 at 01:17 PM. |
09-03-2009, 12:40 PM | #36 (permalink) | |
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You get the same result by using nitro-methane...though, don't go buying R/C gas and sticking it in your Z. |
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09-03-2009, 12:43 PM | #37 (permalink) |
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I don't think members on this site believe on an absolute level that high octane always equals higher power. It's not always the case.
But when your talking in terms of going from 87 to 93 for your 370z, your "equation" actually does apply. Last edited by ZzzZz; 09-03-2009 at 01:17 PM. |
09-03-2009, 01:39 PM | #38 (permalink) | |
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Going from 91 to anything above it, snake oil. Last edited by kannibul; 09-03-2009 at 01:54 PM. |
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09-03-2009, 02:18 PM | #41 (permalink) |
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I'm gunna try to list things on the back of my head now..
1.8L>2.0L Bore, Camshafts, Cam Gears, Pistons, Rods, Valve Springs, Fuel Pump, Fuel Rail, Injectors, Port Matched, Port & Polish, Ecu.... etc... too much to list on my track car. |
09-03-2009, 02:25 PM | #42 (permalink) | |
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Higher Octane dosen't increase HP/TQ it just helps to keep Pistons from coming out the side of the block or through the oilpan by helping reduce Knocking and Pinging. Tuning is where you get your HP from. Last edited by Izzoh; 09-03-2009 at 02:31 PM. |
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09-03-2009, 03:00 PM | #44 (permalink) | |
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What do you do if you can't get 94 octane? Why go to 94 octane unless you're running 12:1 or greater compression? |
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