|
SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Octane? /cgi-bin/YaBB.pl?num=1397938094 Message started by twelveport on 04/19/14 at 13:08:14 |
|
Title: Octane? Post by twelveport on 04/19/14 at 13:08:14 I'm just wondering why some people will only use 91 or higher octane with 8.5:1 compression ratio? I have used both in my LS650 & have not noticed any pinging. Just wondering what Suzuki recommends? |
|
Title: Re: Octane? Post by Kris01 on 04/19/14 at 13:24:29 87 is way beyond good enough. 8.5:1 won't benefit from anything higher. |
|
Title: Re: Octane? Post by twelveport on 04/19/14 at 13:28:10 Thank you for confirming. |
|
Title: Re: Octane? Post by shorty on 04/19/14 at 14:28:26 I had the opportunity to fill up with 89 octane leaded fuel and the motor LOVED it... or maybe my brain was lovin' it? |
|
Title: Re: Octane? Post by Dave on 04/19/14 at 17:51:07 787B69607A697C637E780C0 wrote:
People do this because they don't know the facts.....that they are wasting money. Stock piston.....use regular. Wiseco......use premium. |
|
Title: Re: Octane? Post by pgambr on 04/19/14 at 17:59:16 Quote:
Dave, why would you use premium with a wiseco? Just curious, thanks. |
|
Title: Re: Octane? Post by Serowbot on 04/19/14 at 18:05:07 Wiseco ups the compression... with a domed top I believe... |
|
Title: Re: Octane? Post by pgambr on 04/19/14 at 18:07:27 7660776A72676A71050 wrote:
Thanks Serow. |
|
Title: Re: Octane? Post by twelveport on 04/19/14 at 18:56:09 You guys have confirmed just what I was thinking. There are a lot of HD's out there and all of those guys burn 91 or better. So I guess there is just a lot of uninformed riders. Does anybody know the compression ratio for HD's? You would be surprised at the number of guys who think higher octane fuel makes more power. But we don't want to go there today. |
|
Title: Re: Octane? Post by old_rider on 04/19/14 at 19:38:51 Nope, my Harley manual said to use premium... |
|
Title: Re: Octane? Post by WD on 04/19/14 at 22:46:20 Every Harley I've ever ridden, even the 1920 Sport Twin, sounded like a washing machine full of rocks if you used regular gas in it. A Savage would happily burn 85 octane. All 4 of my Indians over the years were designed to run on 60 something octane garbage gas. Very anemic compression ratios. My 1949 Dodge 218 L6 will run on stale gas, it might have 6.5 or 7:1 compression. My 98 Savage was happiest with low octane modern garbage gas and a splash of ATF or 2 stroke oil every couple tanks. A lot quieter than with plain modern gas. Accidentally fueled the 03 Savage with 89 the other night, ran like crap. Filled it with 87 today and it ran fine. If you can find it locally, run pure gas, no alcohol. The difference in how the engine sounds is incredible. As is the fuel economy boost. |
|
Title: Re: Octane? Post by oldNslow on 04/20/14 at 06:33:19 Astonishes me that people ignore the octane recommendations of of the bike manufacturer, often for all sorts of goofy reasons. Why would Honda,HD yamaha etc. etc mislead folks about something like that? Just use whatever the book says to use and quit worrying about it. |
|
Title: Re: Octane? Post by twelveport on 04/20/14 at 06:41:27 I'm not sure if anybody is "ignoring" what the owners manuals says. Most of the time when you buy a used bike it does not come with a owners manual so we have to rely on our own judgement or the opinions of others. That is why we come to this web site. Thankfully we have those who have checked into this before or have a owners manual. |
|
Title: Re: Octane? Post by ToesNose on 04/20/14 at 07:14:25 Lowest available at the pump for me for the LS650, I don't like throwing money away and that's what the engine is made for ;) |
|
Title: Re: Octane? Post by twelveport on 04/20/14 at 07:16:45 I agree! |
|
Title: Re: Octane? Post by WD on 04/20/14 at 07:32:48 4D73727E6C70711F0 wrote:
The manufacturers recommend fuel grade based on 2 things, #1 is the pressure they get from "Big Oil", #2 is the actual requirements of the engine. Easiest way to figure minimum octane requirement... if you know your compression ratio, say 8.5:1 for cheap small bikes, multiply it by 10 to get your minimum octane rating. In this case, 85, but most stations have a minimum pump octane rating of 87. In parts of the upper mid-west you can buy 85.5 to 86.5 octane, so, run it on those. Putting higher than 87 in a Savage, unless you have a shaved barrel/head or domed piston, is a waste of money. 87 octane pure gas in my 98 was good for 70+ mpg, 91 octane modern blended gas was good for high 40s mpg... and that was back when it ran stock handlebars. With the 15" apes, it got 45 on real gas and 36 on modern gas. The effort to get alcohol free gas is worth the extra cost. Running mid grade or premium in a glorified Briggs and Stratton engine is not. |
|
Title: Re: Octane? Post by oldNslow on 04/20/14 at 07:45:02 6360727B617267786563170 wrote:
Didn't mean to ruffle any feathers. You're right . Questions like yours are exactly what this site is for. I just get a kick out of these "octane" discussions. If one of these threads goes on long enough someone is sure to chime in with an anecdote like this: "My Grandpappy had a old Ford pickup with a flathead motor in her. He used to drive that truck over to the airport and fill that sucker up with 105 octane avgas. Man, that old truck ran like a raped ape ! !. Fastest truck in the whole dern county!!" ::) Sometime when you're not busy, go over to one of the Harley forums and read through one of the "octane wars" on there. You'll be amazed. Anyway, sorry. Sometimes I'm a jerk. I can't help it. |
|
Title: Re: Octane? Post by verslagen1 on 04/20/14 at 08:36:46 6E6D7F766C7F6A75686E1A0 wrote:
Thankfully, we have a copy of the owners manual that you can download in the tech section. |
|
SuzukiSavage.com » Powered by YaBB 2.2! YaBB © 2000-2007. All Rights Reserved. |