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05DodgeDakota
12-21-2011, 08:54 AM
I'm wanting to start experimenting with lower octane fuel. Will you hear it ping at idle? Do I have to wait for it to warm up first?
Thumpin440ex
12-21-2011, 09:27 AM
First of why?? 2nd no no ping at a idle, only while under load..


John
chronicsmoke
12-21-2011, 11:09 AM
Could be an expensive experiment.. what fuel are you running now in it?
05DodgeDakota
12-21-2011, 02:03 PM
running 100 sunoco right now. Wanna try 100ll and a 50:50 of 100LL and 90 ethanol free. Would also like to try 93 pump straight
Wheelie
12-21-2011, 03:16 PM
From my experience, pinging occurs once the engine is warmed up and 3rd-5th under a load in the mid rpms (roughly 5-7k).

Pump 93 w/12:1 isn't going to be a happy combination. 50/50 Av gas and premium will probably be about as low as you can go safely.
01boneless
12-21-2011, 04:39 PM
i would skip the 93 idea wouldent take long for it to fuge up your motor. the 50/50 might work but if it starts to ping id do 75/25 mix. if you have the money it would just be easyer running strait 100
DnB_racing
12-21-2011, 04:48 PM
Originally posted by 05DodgeDakota
I'm wanting to start experimenting with lower octane fuel. Will you hear it ping at idle? Do I have to wait for it to warm up first? here is a decent calculator to help get the desired octane

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=4&ved=0CDMQFjAD&url=http%3A%2F%2Fwww.serioussolutions.com%2Fevo%2F octcalc.htm&ei=cW_yTvrQJert0gHH0fGbAg&usg=AFQjCNGBYLsb7JPCkzMRJ-uU3toRCETiwg&sig2=vrRxgjElMeqmt2XN9C63rA
Thumpin440ex
12-21-2011, 06:03 PM
Not a def but you might be able to get away with 12.1 piston on pump 93.. Only reason being is the cam(aftermarket) overlap, lsa is a little more then stock, so it would bleed some compression off, not to mention a few other factors play in.. Let it warm up good and go rip it around for a min, check the plug after.. I do know aluminum headed cars can get away with it, but that is the use of aftermarket heads, pistons that make a really good quench pad..


John
JOHNDOE83
12-22-2011, 06:52 PM
For piece of mind I would just keep running the sunny 100oct.

That what I like using also!
05DodgeDakota
12-23-2011, 08:12 AM
I would have more piece of mind NOT spending $8 a gallon lol
Baileygunns
12-23-2011, 08:36 AM
You have to figure your bike holds 2.5 gallons and let's say you ride all day and burn 2 tanks of gas (I'm lucky to burn 1 full tank at my age, lol)... Even at $8 a gallon you've only spent $40 on fuel. Some people spend that just trailering thier quads to and from a track or riding spot... Not sure where in central Fl you are but I used to pick up 100ll in Titusville for about $4 and change a gallon at a local airport.
chronicsmoke
12-23-2011, 08:36 AM
You don't want to know how much we pay for 5 gal. of VP C-12.

120$ After tax in town, 90$ after tax at a distribution center in Ottawa (1 Hr. away)

24$/gal in town
18$/gal for an hour drive

At 8$ a gal, I'd run it full time. Hell, we are paying $4.54 a gallon of regular test gas..
05DodgeDakota
12-23-2011, 08:51 AM
I have 100LL on hand, and pat right around $5 a gallon for it. Just nervouse about running it straight full time...
powerbomb400
12-23-2011, 09:08 AM
In 5 gallon jug I put 3 gallons 110 leaded race gas and 2 gallons 93 (ethanol free). Run it all the time. Even in my wifes 250ex and its stock except for a 2 Brothers Racing silencer. I give 7.00 dollars a gallon for the 110 and 3.45 a gallon for the premium. unleaded. She can tell a difference if I just put premium unleaded in it. That's why I mix it all the time. The lead keeps all the carbon buildup burned off. When we had my motor apart there wasn't any carbon buildup.