SuzukiSavage.com - type of fuel

mo.goad YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 20	Re: type of fuel Reply #15 - 07/26/08 at 14:58:08 I tried all 3, 87,90,93. No difference. 87 for me
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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: type of fuel Reply #16 - 07/26/08 at 15:53:02 My '02 runs fine on 87 octane. Tried 93 and had the bike run rough under hard excellation (not like I use WOT a lot)
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Charon

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Re: type of fuel
Reply #17 - 07/26/08 at 17:03:41

Compression ratio is said to be 8.5:1, according to various road tests and the Suzuki web site. That would make me think it ought to be perfectly happy on Regular. You can probably induce pinging (or knocking, if you prefer) by running it on a hot day, in high gear at low speed with heavy throttle application.

If you go up to high altitude (Colorado) you may find Regular billed as 85 octane instead of 87. That's because the higher altitudes reduce ambient air pressure, thus cylinder pressure, and lower octanes work fine. Those higher altitudes also richen the mixture, because carburetors meter fuel according to volume airflow instead of mass, and the richer mixture also helps reduce knocking. You also lose power, about 3% per thousand feet of altitude.

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Eschew obfuscation.

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Jay

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Re: type of fuel
Reply #18 - 07/27/08 at 02:24:17

Seth wrote on 07/26/08 at 14:42:42:

I adjusted it today, but can't get the bike on the road till the wife comes back from visiting friends...I got all three kids, so can't just hop on the bike and go for a cruise! It does seem to have had some effect on it already though, since when I shut down, I don't get the loud explosive backfire I used to. There's still a soft thump of gasses when I shut down, but not a true backfire in the sense. hopefully, that'll make a difference, and I can fine tune it when I get a chance to put the engine under a load when riding it.

What? One on the pillion, one in each saddlebag. Problem solved! Cheesy

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Ride safe,
Jay

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Seth

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Re: type of fuel
Reply #19 - 07/27/08 at 07:40:01

Jay wrote on 07/27/08 at 02:24:17:

Seth wrote on 07/26/08 at 14:42:42:

I adjusted it today, but can't get the bike on the road till the wife comes back from visiting friends...I got all three kids, so can't just hop on the bike and go for a cruise! It does seem to have had some effect on it already though, since when I shut down, I don't get the loud explosive backfire I used to. There's still a soft thump of gasses when I shut down, but not a true backfire in the sense. hopefully, that'll make a difference, and I can fine tune it when I get a chance to put the engine under a load when riding it.

What? One on the pillion, one in each saddlebag. Problem solved! Cheesy

I don't care who you are, that's funny! Grin

lol

But in all seriousness, I appreciate the help you guys offer, and am glad to see that this website isn't one of those dead forums, that no one talks on or does anything with...it's been a pretty big help to me so far.

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01 Savage 650, 01 Dodge 2500 4x4 CTD with mods, 72 Jeepster Commando.

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Savage_Rob Serious Thumper Alliance Member Offline Mechanically Inclined Amateur Posts: 6972 Texas (Dallas area) Gender:	Re: type of fuel Reply #20 - 07/30/08 at 06:11:03 Demin wrote on 07/25/08 at 13:48:36: I usually run 86/87,but in this 100 degree heat I've been running premium because it has been pinging when running it hard.Seems to be ok,and no pinging. Yup, either high heat or high compression can contribute to predetonation. I tend to run premium in the hot months here in N. Texas.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: type of fuel Reply #21 - 07/30/08 at 06:54:04 Ive seen Reelthing's post on this. He lives in Very South Texas, where sand & water meet, & he runs premium some months to keep things cooler.
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Brad_THMP3R Junior Member Offline Fighting for Iraqs Freedom Posts: 82 Hampton Roads, Va Gender:	Re: type of fuel Reply #22 - 07/30/08 at 12:31:06 I live is 100 degree temps at sea level. On 87 the bike hesitates, runs hot and just says "no!" I keep 93 in it. It burns cooler, slower, and just keeps the bike happy. I also use a cap of MMO per tank. It seems to keep things loosey goosey and prevent any buildup of crud on the exhaust valve. RSD!
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rpgpgmr Senior Member Offline Posts: 270 Huntington, WV Gender:	Re: type of fuel Reply #23 - 07/30/08 at 13:03:33 I've be running high octane for the past couple of months and it does seem to be running a little better ... believe or not my mileage seems to have gotten a bit better too. It's probably in my head, but it cost $0.40 more a tank and I'm gonna stick with for a while.
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