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Old 02-24-2007, 01:44 PM   #21
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Quote:
Originally Posted by Clayton9698
:laughing6 :laughing6

jay just fill her up with 93 and run it out.. worst case it will have 92 hp instead of 95 for the next 100 miles or 68 wheelies, how ever you track your fuel consumption.
WHAT?????????????

1st of all, tell whoever did it to check the owners manual to see the suggest octane level for his bike....but either way...it's the SUGGEST octane level......

Means absolutely nothing if he put 87 and he sure as won't have a decrease of 3hp. Higher octanes don't produce HP or decrease HP, they prevent detonation.

Jesus people
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Old 02-24-2007, 02:02 PM   #22
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Quote:
Originally Posted by dbonezny
WHAT?????????????

1st of all, tell whoever did it to check the owners manual to see the suggest octane level for his bike....but either way...it's the SUGGEST octane level......

Means absolutely nothing if he put 87 and he sure as won't have a decrease of 3hp. Higher octanes don't produce HP or decrease HP, they prevent detonation.

Jesus people
i wasnt 100% sure on that.. thas why i said "worst case"... :confused1
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Old 02-24-2007, 02:08 PM   #23
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Old 02-24-2007, 02:10 PM   #24
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Old 02-24-2007, 02:25 PM   #25
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Quote:
Originally Posted by Badzx14r
right but you forgot in cool weather lower octanes increase power...
you only need to worry about detonation in hot weather and stop and go traffic cases ...
And high rpm. Motorcycle engine do not have knock sensors to adjust timing. If you run to the red line alot you should run high octane to reduce the risk of pinging. 14,000 and knocking = bad juju
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Old 02-24-2007, 02:33 PM   #26
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the extra dollar or so on a 9 dollar fill up is worth it to me because i dont want to have to worry about listening for pinging or the remote chance it will happen..
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Old 02-24-2007, 03:19 PM   #27
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Old 02-24-2007, 04:34 PM   #28
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Quote:
Originally Posted by vfracer-r
I have not seen any literature or tests that say that pinging or knocking from fuel actually hurts anything. Regarding the above about going uphill, 6th gear, 40mph etc... I'd bet most any motorcycle would do that- no matter what fuel you have in it.

Detonation or pinging are shockwaves created by pre-ignition. Of course they hurt things. Not to mention killing your performance. If you have a weak spot in a head gasket pinging will surely blow it out.
http://www.msgroup.org/TIP037.html

If detonation didn't hurt anything manufacturers wouldn't give you minimum octane ratings to use and car manufacturers wouldn't install knock sensors to adjust timing.
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Old 02-24-2007, 04:35 PM   #29
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Quote:
Originally Posted by Badzx14r
from my understanding from guys that wanted to find where their bike ping factor was at ..
the only way they found a bike to ping was 6th gear lugging up a hill (6th gear 40mph and full throttle uphill ) on low octane gas and 100 degree heat of day testing
or timing changes

Every bike is different. Different compression ratios, different fuel mixtures and different gasoline blends.
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Old 02-24-2007, 04:38 PM   #30
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predetonation does tend to put some strain on wrist pins and rods... yep
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Old 02-24-2007, 04:40 PM   #31
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I put jet fuel in my bike i have no problems
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Old 02-24-2007, 04:45 PM   #32
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most motorcycles will never have a problem with detonation. The compression ratios are not high enough. They problems comes into play at higher rpms. Most of you guys have never experianced pinging because cars now days have sensors to control it. Those of you with old muscle cars know the sound. High compression motors and low octane gas do not mix. If you take you motorcycle to the track on 87 octane pump gas you are asking for motor issues and you might not even hear it. Wind noise and loud exhaust will mask it.
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Old 02-24-2007, 04:47 PM   #33
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If you raise your compression, the higher compression rate makes the fuel ignite at a lower temp, so a higher octane fuel is typcially required to comensate for a higher compression environment (to keep the fuel igniting at the right time). That aside, the average valve head is already very compact - which means that the distance the flames travel from your plug to the walls of the cylinder is so fast/short that slower burning premium fuels are typically not needed. (afaik)

If knocking (or pinging) occurs however, use a gasoline of a different brand or premium unleaded fuel.

Running 87 during the colder months you might not notice any difference - but during the hot summers here - listen closely to your engine. As said above - m/c's don't have an engine knock sensor.

Or when in doubt, just run what your owner's manual says to run.
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Old 02-24-2007, 05:24 PM   #34
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Old 02-24-2007, 05:39 PM   #35
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Quote:
Originally Posted by dbonezny
WHAT?????????????

1st of all, tell whoever did it to check the owners manual to see the suggest octane level for his bike....but either way...it's the SUGGEST octane level......

Means absolutely nothing if he put 87 and he sure as won't have a decrease of 3hp. Higher octanes don't produce HP or decrease HP, they prevent detonation.

Jesus people


OK.. im confused.. ^^ is saying that all the detonation changes and pinging and knocking will not hurt performance? can someone back him up on that.. i find it hard to believe a motor that is making noises and not running 100% is still going to put out the exact same HP.
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Old 02-24-2007, 05:56 PM   #36
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Old 02-24-2007, 06:14 PM   #37
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Quote:
Originally Posted by Badzx14r
if you want a holed piston or a blown head gasket ride with the ping

ok... so you are agreeing that it will not reduce HP? but it will up the motor eventually?
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Old 02-24-2007, 06:16 PM   #38
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Quote:
Originally Posted by Clayton9698
ok... so you are agreeing that it will not reduce HP? but it will up the motor eventually?
No horse power to be lost by using 87 octane. Has POTENTIAL to a motor up in the long run under certain circumstances.
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Old 02-24-2007, 06:19 PM   #39
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Theoretically, 87 octane will produce slightly hight hp numbers due to a more rapid burn rate. 93 octane merely burns slower to prevent compression/flash firing. I wouldn't say it would be enough to risk engine damage.
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