93 Octane , NA Rotary
I know this has been beaten to death but my reasons for asking are different. 93 octane is supposed to burn cleaner than 87 therefore having clean internals thus extending the life of the car..( you would also have cleaner injectors) but I also heard that the rotary can't burn off 93 all at once and there is excess fuel left over after the combustion stage.
So in the long run which is better to run 87 or 93? This is just my understanding so please give me your insight thanks! |
93 doesn't burn slower, it is just harder to ignite. This is how it prevents spontaneous ignition before the plug fires (pre-ignition).
So basically in your N/A motor, not seeing the high pressure of boost, is a total waste of money. |
The rule of thumb in regard to octane for an RX-7 is this:
87-octane for non-turbo 93-octane for turbo-charged I've run regular fuel (87) in my non-turbo for years with no problems, and it's perfectly fine even with mild modifications such as exhaust and intake. |
For more power in a stock port non turbo, (or stock boost turbo) go with the lowest octane you can buy 86 or 87 is fine.
Remember the octane level has nothing to do with the BTUs (power) of the fuel, but is instead the amount of resistance to prematurely igniting or detonating. If your non turbo is tuned and running fine, 85 or 86 is all it will ever need and it will run better as well as save you a few bucks at the pump. |
93 octane feels like it pulls harder in a na rotary
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Originally Posted by 87FCna
(Post 9050554)
93 octane feels like it pulls harder in a na rotary
yeah.... No. It does not. |
Originally Posted by 87FCna
(Post 9050554)
93 octane feels like it pulls harder in a na rotary
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Originally Posted by Icemark
(Post 9050614)
You need to re-calibrate your butt dyno.
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Originally Posted by 87FCna
(Post 9050554)
93 octane feels like it pulls harder in a na rotary
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im using 91 pump gas and on cold mornings the car run a lot rougher than if its warm .
Does using 87 octane would minimize this issue |
sorry 1986 rx7 gxl na
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yeah most likely because it doesn't need the 91....stop wasting your money
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Originally Posted by Eriks85Rx7
(Post 9050228)
93 octane is supposed to burn cleaner than 87
http://www.toptiergas.com/
Originally Posted by Eriks85Rx7
(Post 9050228)
I also heard that the rotary can't burn off 93 all at once and there is excess fuel left over after the combustion stage.
Originally Posted by Eriks85Rx7
(Post 9050228)
So in the long run which is better to run 87 or 93?
Originally Posted by mark86
(Post 9051710)
im using 91 pump gas and on cold mornings the car run a lot rougher than if its warm .
Does using 87 octane would minimize this issue |
Originally Posted by cluosborne
(Post 9050533)
The rule of thumb in regard to octane for an RX-7 is this:
87-octane for non-turbo 93-octane for turbo-charged |
Thread closed; this information can be found in the FAQ of this section.
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