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Anthony Oberti
Well-known member
How much you guys running with the new head at 12-13lbs? And at which point do you have to run straight?
How much race fuel?
- Thread starter Anthony Oberti
- Start date
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Kestrel2126
Well-known member
What head on what sled? I run straight 113 (108mon) on my 700 at 13 PSI.
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Anthony Oberti
Well-known member
Updated 2010 head. What elevation are you at? I hear guys running less than 50/50 at the same boost?
i have 09 d8 with 2010 updated head and i run 14 psi at 7000ft and i use 50/50 c12 and pump, never had a problem
+++++1
+++++1 and I use the 08 head!!!
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Anthony Oberti
Well-known member
Wow!!!! I have be running straight 110!! Guess I wasted alot of money...o'well, she should run way better now!!! Think I will start at 75% race and then drop down from there. Kind of nervous after running it this was for the last 2 years.
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Jkinzer
Well-known member
I am running a slightly modified 2010 head, but i have 4 other turbo d8's in my group that are bone stock other than the turbo and run 1 or 2 gallons of race gas to pump and run up to 12-13lbs as well with no problems... again this is at 6-9k feet primarily above 7500.
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Anthony Oberti
Well-known member
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Kestrel2126
Well-known member
Where are you all getting these ratio's????? what exactly is it that is being accomplished by mixing 13.5 Gallons of premium to 2 gallons of RG? I could see if you are mixing gin by getting your octane up with toulene or something. Honestly if you are going to do that you might as well go straight pump. Your octane with that ratio is probably only 92-93. There is an equation to figure it out. Even mixing 50/50 with 91 octane and say 110 octane, does not produce a median average octane fuel. It would be 100.5 octane if it did, (it doesn't) which is the same as av gas, which would be cheaper just to buy straight up and not have to mix.
Anyhow to each his own. Good luck, I hope no one blows up. I myself, will continue to run high octane fuel, on a "race gas turbo" (I think they call it that for some specific reason). I would rather pay for the fuel up front than grenade motors.
Anyhow to each his own. Good luck, I hope no one blows up. I myself, will continue to run high octane fuel, on a "race gas turbo" (I think they call it that for some specific reason). I would rather pay for the fuel up front than grenade motors.
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Jkinzer
Well-known member
my sled is a pump gas turbo buddy... running 2-3 gallons of race gas is a little extra assurance because all of our pump fuel is chitty around here and full of ethanol. i have ran this set up for over 5 thousand miles with no blow ups or burn downs, so it obviously works. there is no ratio... i just do it to be a little more on the safe side. my egt's are never over 1290, and my charge temps are never over 200
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Kestrel2126
Well-known member
Easy there SPORT. Wasn't trying to get you all hostile
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Kestrel2126
Well-known member
My point was that adding that little race fuel is doing very little to change your actual octane. If you are getting bad pump fuel, you are barely elevating it in quality. Yes there is a Ratio, anytime you are mixing anything x-parts to x-parts, it becomes a ratio. Basically you are not basing what you are mixing off of anything, just blindly adding some race gas to your other fuel under the assumption that it will raise the octane rating and quality.
I was not trying to insult you, just be informative as to how octane ratings work and how mixing it is not a simple basic formula to gain a true octane rating.
"Anyhow to each his own. Good luck, I hope no one blows up."
Obviously, I was not wishing bad luck on you the way you are running. If you have had luck, that is great. I hope it continues for you.
I was not trying to insult you, just be informative as to how octane ratings work and how mixing it is not a simple basic formula to gain a true octane rating.
"Anyhow to each his own. Good luck, I hope no one blows up."
Obviously, I was not wishing bad luck on you the way you are running. If you have had luck, that is great. I hope it continues for you.
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Anthony Oberti
Well-known member
Correct me if I am wrong, but you want to run the least amount of race fuel in any motor without it detonating, correct? My understanding is that the more race fuel you run......that is not neccessary, the worse the motor runs. Granted, these turbos all run good at 10-14lbs, but I am simply referring to the theory regarding running race fuel.
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everytime5.9
Well-known member
Whats the diff?
Hey guys quick question, im on the cat side of things but what enables the polaris to run these boost #'s safely? Is the compression that much lower or do the controllers pull timing when boosting?Dome design? i just dont understand i was going to run a "turbo" head on straight avgas (turbo m7) at 10-12# 6500ft+ and thought i was pushing it compared to others. Any related insight?
Hey guys quick question, im on the cat side of things but what enables the polaris to run these boost #'s safely? Is the compression that much lower or do the controllers pull timing when boosting?Dome design? i just dont understand i was going to run a "turbo" head on straight avgas (turbo m7) at 10-12# 6500ft+ and thought i was pushing it compared to others. Any related insight?
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Kestrel2126
Well-known member
Times two, especially the part about "error on the safe side".
