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post #1 of 23 (permalink) Old 09-16-2007, 08:18 PM Thread Starter
 
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What type of gas?

One of my friends just recently got an 02 sv650s, and he didn't get a manual with it, but i'm trying to help him figure out what gas is best to run in it. because he is worried about the "sv knock" so all replies will be appreciated.
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post #2 of 23 (permalink) Old 09-16-2007, 08:32 PM
 
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which ever is fine. a higher grade octane will be better in the long run, like taking the lint out of your pocket will help you loose weight in the long run.
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post #3 of 23 (permalink) Old 09-16-2007, 08:49 PM Thread Starter
 
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thanks for the info, but will the premium gas help the knock that accomadates a lot of sv's
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post #4 of 23 (permalink) Old 09-16-2007, 11:18 PM
 
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thanks for the info, but will the premium gas help the knock that accomadates a lot of sv's
I don't know anything about SVs specifically, but knocking is a sign that your octane needs to be higher. However, running higher octane than what the manual calls for is a waste of money and actually decreases performance. I would imagine that running 91 octane in an SV would be fine, though. Try that.
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post #5 of 23 (permalink) Old 09-16-2007, 11:37 PM
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Originally Posted by ceo012384 View Post
I don't know anything about SVs specifically, but knocking is a sign that your octane needs to be higher. However, running higher octane than what the manual calls for is a waste of money and actually decreases performance. I would imagine that running 91 octane in an SV would be fine, though. Try that.
I wouldnt say loss of perf but def waste of many if its not whats req.
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post #6 of 23 (permalink) Old 09-17-2007, 12:35 AM
 
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my buddy has an 02 sv650 and he swears to only use at least 91 grade. he has taken it 30k mi with no problems so its not that expensive i would use the good stuff man.
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post #7 of 23 (permalink) Old 09-17-2007, 12:39 AM
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RTFM!!!!
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post #8 of 23 (permalink) Old 09-17-2007, 12:46 AM
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RTFM!!!!
Truth right thar.
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post #9 of 23 (permalink) Old 09-17-2007, 01:06 AM Thread Starter
 
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i'll tell him, thanks guys. those dam sv's have that strange knock so he was curious about it
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post #10 of 23 (permalink) Old 09-17-2007, 09:07 AM
 
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I wouldnt say loss of perf but def waste of many if its not whats req.
Yes loss of performance, although you may not notice it if it's only 91 vs. 93. If the engine is mapped for 91, using a higher octane will have 'basically' the same effect as retarding the ignition timing, since higher octane burns slower. As we all know, retarded ignition timing decreases power and is not used except in cases where required (like turbo applications).
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post #11 of 23 (permalink) Old 09-17-2007, 10:44 AM
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Yes loss of performance, although you may not notice it if it's only 91 vs. 93. If the engine is mapped for 91, using a higher octane will have 'basically' the same effect as retarding the ignition timing, since higher octane burns slower. As we all know, retarded ignition timing decreases power and is not used except in cases where required (like turbo applications).
With pump gas I dont think anyone can tell now if your mapped for say 87 n run 103 race fuel yea maybe
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post #12 of 23 (permalink) Old 09-17-2007, 01:16 PM
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I've never heard a knock at all on mine. I've run 87 - 91


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Yes loss of performance, although you may not notice it if it's only 91 vs. 93. If the engine is mapped for 91, using a higher octane will have 'basically' the same effect as retarding the ignition timing, since higher octane burns slower. As we all know, retarded ignition timing decreases power and is not used except in cases where required (like turbo applications).
You said retarded!

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they make the one i posted in a strap on version
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post #13 of 23 (permalink) Old 09-17-2007, 01:58 PM
 
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With pump gas I dont think anyone can tell now if your mapped for say 87 n run 103 race fuel yea maybe
Right you can't notice a HP or two, but it's happenin'.

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You said retarded!
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post #14 of 23 (permalink) Old 09-17-2007, 09:18 PM
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which ever is fine. a higher grade octane will be better in the long run, like taking the lint out of your pocket will help you loose weight in the long run.
Not true. Not better... unless the motor and the ignition is set for the higher octane.

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Yes loss of performance, although you may not notice it if it's only 91 vs. 93. If the engine is mapped for 91, using a higher octane will have 'basically' the same effect as retarding the ignition timing, since higher octane burns slower. As we all know, retarded ignition timing decreases power and is not used except in cases where required (like turbo applications).


ontane is all about when the mix ignites in the cylinder... and milliseconds are alot. It is the different of piston height in the cylinder. There is a fine line for the most power and that is aligned with the ignition and the timing.




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post #15 of 23 (permalink) Old 09-19-2007, 12:34 PM
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Not true. Not better... unless the motor and the ignition is set for the higher octane.
.
I think he was being facetious.
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post #16 of 23 (permalink) Old 09-19-2007, 12:38 PM
 
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Not true. Not better... unless the motor and the ignition is set for the higher octane.





ontane is all about when the mix ignites in the cylinder... and milliseconds are alot. It is the different of piston height in the cylinder. There is a fine line for the most power and that is aligned with the ignition and the timing.
so higher octane rating is not better for your engine?
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post #17 of 23 (permalink) Old 09-19-2007, 01:06 PM
 
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I have an Sv also and i have run 87 in it since i have got it except couple times. Its made to run on 87 it doesn't get any better gas miliage with higher octane. I have over 20k miles on my 06.I ride ALOT :P. Haven't had 1 engine issue yet. Manual says 87 octane FYI

Last edited by papapoi; 09-19-2007 at 01:08 PM.
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post #18 of 23 (permalink) Old 09-19-2007, 01:08 PM
 
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If you have any question fromt he manual mine stays by the tool box. post up or drop me a Pm and I'll answer any question ya need, I'm not a bike guru but help ya the best i can.
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post #19 of 23 (permalink) Old 09-19-2007, 02:37 PM
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so higher octane rating is not better for your engine?
Not nessicarly. You only need more octain if you're getting pre-detonation.




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post #20 of 23 (permalink) Old 09-19-2007, 07:21 PM
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Quote:
Originally Posted by OneSickPsycho View Post
I think he was being facetious.
WOW OSP! Big word for you... Did you get that one all by yourself, or did you have to look it up?

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