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it's $7.859 a gallon! That's a helluva fill up. The pump reads: Racing gasoline, not a Union 76 product. Wonder if a gallon or two might be worth a try in the vert the next time I'm on empty... or the STSV? Wonder which bike would show more of a difference, my six carbed CBX or the Busa?
it's $7.859 a gallon! That's a helluva fill up. The pump reads: Racing gasoline, not a Union 76 product. Wonder if a gallon or two might be worth a try in the vert the next time I'm on empty... or the STSV? Wonder which bike would show more of a difference, my six carbed CBX or the Busa?
Don't. No benefit unless your engine is built for it and the Corvette- for certain- won't benefit- and continued use can screw it up. I don't know anything about bikes, but again, would doubt there's benefit.
Unless the laws of physics have changed in recent decades, high octane gas burns slower than lower octane, thus preventing detonation in high compression engines, or in engines with poor combustion chamber design, allowing poor flame travel.
At what octane is there the law of diminishing returns?
Simple answer: The benefit stops at the point where there is no longer detonation in the cylinder. After the knocking stops, any extra octane rating is needless and a waste of money. Octane rating does not equal horsepower.
Simple answer: The benefit stops at the point where there is no longer detonation in the cylinder. After the knocking stops, any extra octane rating is needless and a waste of money. Octane rating does not equal horsepower.
Simple answer: The benefit stops at the point where there is no longer detonation in the cylinder. After the knocking stops, any extra octane rating is needless and a waste of money. Octane rating does not equal horsepower.
Ah yes....the good ol days. Just keep turning that distributor till she knocks....then back it off just a C-hair.....
Ah yes....the good ol days. Just keep turning that distributor till she knocks....then back it off just a C-hair.....
A little bit of background about the timing advance mapping in modern ECM programming. All modern vehicles have a top potential timing advance number programmed into the ECM. That number is a goal for the engine to reach. It's usually a lofty goal at that. Under most driving conditions the ECM continues to advance engine timing until the knock sensor starts to hear the detonation of too much advance then backs out the timing. The ECM does this constantly while you drive, This is the reason you can run any gas in any car. They have no "sack" with 87 octane....but they run. Theoretically if you have 100 octane fuel you would allow your ECM to run as much advance as your knock sensor would allow. More advance more power to a point...then they all detonate. Try the 100 Octane just for ***** and Giggles and see how she lights up those rear meats!!
I stopped at a Mobil station here this week and 87 was $1.99 and 93 was $3.09. For a fill up that is $15 more so how well does octane booster work and is that an option? It can't cost $15. The top tier stations are really sticking it to us for premium.
A little bit of background about the timing advance mapping in modern ECM programming. All modern vehicles have a top potential timing advance number programmed into the ECM. That number is a goal for the engine to reach. It's usually a lofty goal at that. Under most driving conditions the ECM continues to advance engine timing until the knock sensor starts to hear the detonation of too much advance then backs out the timing. The ECM does this constantly while you drive, This is the reason you can run any gas in any car. They have no "sack" with 87 octane....but they run. Theoretically if you have 100 octane fuel you would allow your ECM to run as much advance as your knock sensor would allow. More advance more power to a point...then they all detonate. Try the 100 Octane just for ***** and Giggles and see how she lights up those rear meats!!
Almost right ... the mapping in the ecm does top out and putting 100 octane in is a complete waste of time .......
a good tune will allow more timing as long as there is no detonation
I stopped at a Mobil station here this week and 87 was $1.99 and 93 was $3.09. For a fill up that is $15 more so how well does octane booster work and is that an option? It can't cost $15. The top tier stations are really sticking it to us for premium.
Almost right ... the mapping in the ecm does top out and putting 100 octane in is a complete waste of time .......
a good tune will allow more timing as long as there is no detonation
Dave
There is no timing range built into the factory program that is unlimited. Since 93 octane is the maximum commercial industry standard, 93 is a good number to bet on. Beyond just considering timing and octane range as it relates to producing more power is the fixed component of compression ratio. Since you cannot easily adjust compression ratio, an experiment trying the 100 octane is pretty much a waste of time and money.
Almost right ... the mapping in the ecm does top out and putting 100 octane in is a complete waste of time .......
a good tune will allow more timing as long as there is no detonation
Dave
I said it was a lofty goal not an unlimited number. It's usually more than the engine (operating on pump gas) could handle. The assertion, earlier in this thread, that it will damage your engine was just not true. So if you want to throw away some extra bucks and see how it runs...why not?
08-16-2016, 11:56 PM
100 octane at a local 76 station but,
or the STSV?
Wonder which bike would show more of a difference, my six carbed CBX or the Busa?
There is no timing range built into the factory program that is unlimited. Since 93 octane is the maximum commercial industry standard, 93 is a good number to bet on. Beyond just considering timing and octane range as it relates to producing more power is the fixed component of compression ratio. Since you cannot easily adjust compression ratio, an experiment trying the 100 octane is pretty much a waste of time and money.
