I'm curious about which to run in my BN turbo pro. I run a 70/30 ratio. Pump gas/race fuel and the sled runs great and I hate to screw it up.
Race Fuel or av gas
- Thread starter richardnohava
- Start date
25/75 av and pump at elevation from 2000 to 7000 feet.
8-9 psi boost
Have not got any det yet
Silber turbo with bullydog ecu reflash
8-9 psi boost
Have not got any det yet
Silber turbo with bullydog ecu reflash
Yours will be broken a lot faster than the rest of us that run straight c12! Av gas burns way hotter, if you were to tear a motor apart that has been run on straight c12 vs one ran on av gas you will notice a difference…anything over 11lbs should be run straight c12..why spend 9k on a turbo if you can't afford the gas? Chances are you won't be able to fit the bill to rebuild a blown motor if you can't afford the extra $$$ in good gas! Something to think about. UNLESS..you run 7-8lbs of boost which THEN i ask why waste your money on a turbo?
7-8 psi is still good for 50 hp. Not really a waste of money IMO. That's the beauty of turbos is you can increase the power by turning a boost
Controller up. Av is also a little harder on fuel pumps. If your gonna spend the money on a turbo and sled... You should monitor egts as well to make sure your not getting to hot
Controller up. Av is also a little harder on fuel pumps. If your gonna spend the money on a turbo and sled... You should monitor egts as well to make sure your not getting to hot
I agree, I am running 6-8 psi boost right now and it is a HUGE difference over stock power and can turn boost up if I desire depending on conditions. Less boost equals longer lasting sled I hope in long run. Im running 100ll 100%. Haven't had any issues. I run 30% av 70% 91 on my stock sleds. IMO any boost is better then stock right?
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theshadowrider
Well-known member
It is important to do your homework on what fuel to run. I agree, don't spend money on a turbo and then go cheap on the fuel. On the other hand, running to much octane is not beneficial and often degrades performances. So just running straight *** octane can hurt performance. I had to back the octane off for my elevation to help with idle issues and throttle response. Backing the octane off I got better throttle response, idled better and got more performance. I was able to get the egt's up higher where I like to see them. There is a lot of variables, so you can't really give a blanket policy of anything over "x amount of boost" you should be running "x amount of octane." I agree its best to start with too much octane and work from there. Here is a good thread with lots of info.
http://www.snowest.com/forum/showthread.php?t=220800&highlight=avgas
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I run Av fuel for my Silber setup. I plan to stay below 10psi, probably at 8. I was always told that the low lead also helped with internal lubrication. Av fuel is more readily available where I'm at. I can go to a couple airports and get the fuel anytime. Race fuel is more costly and harder to find here in the mountains.
Who said I can't afford the fuel ? For the record this is season 3 on my sled with 0 problems. I only run 6-8lbs but I wouldn't call it a waste the difference between a stock sled at 10k ft + and 8 lbs boost is huge . I guess I'm just not as cools as you since I see no need for more boost most days.
Appearently your not aware that carms is the smartest coolest guy in the entire world and his opinion is the only thing that matters . Everyone eleses experience and preference is simple ingnorace
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Boyko
Well-known member
Please ignore the Carms post, there is incorrect information within it. The biggest benefit with AV fuel is it is vary stable and well regulated, a lot of types of race fuel can go bad with time after there open. I have even herd of unopened containers that were crap.
Been running AV for years never a problem, currently my 800 pro is fed on 60/40 av pump @ 7-8psi 2400 feet with a water to air set up. Never seen a deto code in 6 years with 5 different boosted 2-smokers. I don't run big boost # on 2-smokers, It just makes for more maintenance and you loose bottom end grunt because you have to toss heaver weights in your primary clutch
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If u do some research on av gas u will find that it is a great fuel for turbo applications. A lot of airplanes are turbocharged and the fuel used needs to work properly from sea level to 20,000 ft in na and boosted situations. Another thing that av gas does have less soot production when burning. Again because airplanes sometimes run an overly rich mixture and really don't want to foul a plug. As for burning hotter NOT. Most race fuels have more BTUS of energy but not enough to really notice except on a dyno. In carbed stuff the things u will see is diff jetting because of the diff spec gravity. Av gas has a little slower burn rate than gasoline so it tends to not detonate also. Av gas is not hard on fuel pumps as it it cannot have really any ethanol in it or any hydrouscopic tendencies. Again airplanes do not want any water in the fuel then climb to 10,000 ft and encounter -20 air and have the water freeze. For very high boost levels yes race fuel is the only way to go but below 14 at sea level it works just fine.
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