Recommended Gas?
#51
04-03-2010, 11:57 PM
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here's a question for everyone...
when you go the pump, is it a multi grade pump or is straight regular, mid grade or premium?
If it's a muti grade pump, there is only one actual pump getting the gas to the same nozzle that all three grades come from.
now the real question is, how much "premium" is really getting in your tank?
chances are the 1st half of yor tank is whatever was pumped last. so if your out with your buddies, wait for them to pum 1st
When I head to the motocross track I always pump 15 liters (Canadian eh) into my truck before fill my gas can for my bike and yes I run premium in my RM250
Just food for thought, kinda like that old tree in the forest question
when you go the pump, is it a multi grade pump or is straight regular, mid grade or premium?
If it's a muti grade pump, there is only one actual pump getting the gas to the same nozzle that all three grades come from.
now the real question is, how much "premium" is really getting in your tank?
chances are the 1st half of yor tank is whatever was pumped last. so if your out with your buddies, wait for them to pum 1st
When I head to the motocross track I always pump 15 liters (Canadian eh) into my truck before fill my gas can for my bike and yes I run premium in my RM250
Just food for thought, kinda like that old tree in the forest question
#52
06-12-2010, 03:34 AM
^Thank you. Now I'm going to be uber paranoid at the pump now. lol. But I never thought about that. I have a theory though. What if that "leftover" gas, flows back down into the tank? Like a reverse pump? There's always a few moments of "set up" time once you select the kind of gas you want, what if it happens then? Just a theory.
I've decided I'm running mid-grade and nothing else. :P As far as my bike sputtering, I found out it is just a random loose battery connection. The vibration was either fixing it or making it worse. Problem solved. HOORAY!
I've decided I'm running mid-grade and nothing else. :P As far as my bike sputtering, I found out it is just a random loose battery connection. The vibration was either fixing it or making it worse. Problem solved. HOORAY!
#53
06-12-2010, 09:31 AM
#56
06-13-2010, 12:10 PM
#58
06-13-2010, 01:15 PM
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What I can tell you from my racing experience is that if you take a car tuned properly for say 89 octane (no knock) and do some runs down the 1/4 mile and then put in 104 octane race fuel and run the car again it will go slower. I have seen this and done this myself over and over.
You need to advance the timing to compensate for the later point of peak pressure of the higher octane fuel to even just get back to the same performance you had at 89 octane.
What the higher octane gas does allow you to do if you have a standalone computer is to advance your timming much more from there and or turn the boost way up or run nitrus without knocking. That's where the gains are made.
You need to advance the timing to compensate for the later point of peak pressure of the higher octane fuel to even just get back to the same performance you had at 89 octane.
What the higher octane gas does allow you to do if you have a standalone computer is to advance your timming much more from there and or turn the boost way up or run nitrus without knocking. That's where the gains are made.
I've seen this first hand on my 89 Vortech S-Trim Supercharged 5.0 mustang and my 95 Nitrous fed bolt on 5.0 - and my 98 LS1 Trans Am bolt on with nitorus.
You want to use the lowest octane fuel that doesn't ping - It won't kill it either way and its not expensive - better to go higher than to low, but 87 is fine for most of these bikes.
#59
06-13-2010, 05:08 PM
Think of fuel as the opposite of power. More fuel/higher octane = less power. The only time higher octane/more fuel actually helps is when you actually need it because your EGT's are getting too high (from being too lean, generally in high comp/boosted engines)
With that, I'm in south Florida, my owners manual says 86, and I run 87 with no pinging.
With that, I'm in south Florida, my owners manual says 86, and I run 87 with no pinging.
