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Fuel octane question

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  #21  
Old 01-10-2019, 02:12 PM
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Originally Posted by handirifle
Oh and I happened to notice the other day, on the Vance n Hines Fuel Pak III web site, they have a CA model of it that does not alter CARB specs, so pretty worthless IMHO. Unless I could snag one from elsewhere......
I got a mainjet from Dynojet in Nevada, but I had to go through the R&D group to get it. Sales would not send me one here in Kalifornia. I was considering having one shipped to my sister in MO, then have her ship it to me if they would not ship direct. I did pick up another one off Ebay a few weeks later. That might be an option for you on the FP3.

John
 
Last edited by John Harper; 01-10-2019 at 02:14 PM.
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  #22  
Old 01-10-2019, 02:12 PM
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Originally Posted by handirifle
Yea I guess you do. LOL I only paid a little over 4K for my bike. Obviously didn"t buy it new. Only had 14K on it. Thought about a big twin to take momma on, but not sure how long of a ride she will want to take, and the sporty is fine for shorter rides.

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I might just try lower octane gas and see whut huppens. I would hate to hear the dreaded ping. CA gas is like a box of chocolates, ya never know what you're gonna get. Humm, that is a catchy phrase, I ought to repeat it.
That's the beauty of the ping. If you hear it, change octane, problem solved. But to blow an extra 15% on fuel is just wasteful. You've seen those commercials with the 3 legged 1 eyed dogs. Sponsor one of them if you have enough money to go around.
 
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  #23  
Old 01-10-2019, 02:25 PM
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To help answer the question on octaine and it has been mentioned.
A stock cam with a lean condition is a certain recipe for a lot of ping.
 
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  #24  
Old 01-10-2019, 04:29 PM
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Manual says to run "91 octane", so what's the question?
 
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  #25  
Old 01-10-2019, 05:14 PM
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Originally Posted by handirifle
You cannot buy avgas here without it going into an aircraft. As mentioned 91 is the highest available here. Mine runs fine on the 91 I was simply wondering how guys with high compression bikes do it, but am learning there is more to it than just octane.

I doubt I would ever get to the point of upgrading my engine like that. Not really sure I need or want it. At 65+ I am mostly overvmy hot rod days. Power is nice when I want to pull a hill loaded heavy, but a lower gear is always available.
Nope. Just compression ratio. Your Toyota Corolla is happy on 87. Your Lambo is happy on 93. Don't have a Lambo,...don't have to worry about it...lol.

Purge all that "high performance" and "better mileage" crap from your memory bank. I had to purge it from mine as well. But don't try and explain it to your friends at the pump. They'll just think YOU'RE the nutty one.
 
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  #26  
Old 01-10-2019, 08:17 PM
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Dont have a Corrolla or a Lambo so no need to worry about either. My bike does not run lean, that has been taken care of. I was merely asking a question about performance machines.

For the record, a LOT of other brands run as high as 11.5 CR on 91 octane, so there seems to be something to what mrhammer says. Not defending it or condeming it.
 
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  #27  
Old 01-10-2019, 08:24 PM
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But for the record, my 2005 Honda Accord with a 3.0L V6 has a 10.0 CR and is designed for and runs perfectly (still after 230,000 miles) on 89 octane gas. It has 240hp and 212 torque and still runs like new. Never used anything but 89 in it either, and we bought it new.
 
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  #28  
Old 01-10-2019, 08:27 PM
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#oilthread lmao
 
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  #29  
Old 01-10-2019, 08:39 PM
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Originally Posted by Thumper26
Manual says to run "91 octane", so what's the question?
Did you READ the first post? I was asking about high performance bikes.
 
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  #30  
Old 01-10-2019, 08:48 PM
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I use 93 in my hot rod Sportster. Never a problem. Ever.
 
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