From knowing nothing to having a Thunderbird supercharger on an m20b27i

[Victell]

I don't think anyone is doubting it can be done... But in this case (or any really) it's not a matter of power, it's a matter of safety.

The only way I'd run a lower octane is if that's the only one available. Like I wouldn't go buy 100 octane race fuel and tune on that because I can't get it drivinf around. 93 is avail mostly everywhere.

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I would say the "safety" has to do with how close your tune is to the point of preignition, not so much with the octane. If you tune for lower octane and stay far away from detonation with grossly retarded timing, then your octane/tune combo would then be "safe". Although you're really leaving a lot of power on the table by doing that. Personally I would run the highest octane possible to get the most from the setup. If I was rich I would run race fuel in my daily driver.

Originally you said "I was hoping I could tune it for regular" which is true, but some replies you indicated you CANT. As long as you understand that you CAN.

[TheTacoMan]

Why is this such an issue, the difference of price between 87-91 isnt that much for a little more peace of mind in having a longer lasting engine and avoiding detonation?
87+ meth may be doable but I personally wouldnt do it. Spending all this time building a FI setup and then running shitty gas does not make sense to me.

[Ether-D]

Well, my first tune is gonna be pretty conservative and I don't even know how much fuel I have in the car currently. It's not going anywhere so it may have to be tuned on 87...

[FLG]

The conclusion you're getting from those links is that you cannot run 87 octane in a boosted application, which isnt true. It explains how octane relates to power. You can run boost and choose any octane you want. You just have to tune for it and understand how it dictates your timing (and power) limits.

Higher octane will allow higher power. Some are willing to pay for race gas, others might want to run 87. Either way needs a corresponding tune.

I don't think anyone is doubting it can be done... But in this case (or any really) it's not a matter of power, it's a matter of safety.

The only way I'd run a lower octane is if that's the only one available. Like I wouldn't go buy 100 octane race fuel and tune on that because I can't get it drivinf around. 93 is avail mostly everywhere.

Sent from my SCH-I545 using Tapatalk 2

[Victell]

Read this, you need to run 91.
http://www.superchargersonline.com/i...age=page&id=47
http://www.superchargersonline.com/i...age=page&id=46

The conclusion you're getting from those links is that you cannot run 87 octane in a boosted application, which isnt true. It explains how octane relates to power. You can run boost and choose any octane you want. You just have to tune for it and understand how it dictates your timing (and power) limits.

Higher octane will allow higher power. Some are willing to pay for race gas, others might want to run 87. Either way needs a corresponding tune.