race gas question
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Joined: Dec 2013
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2009 C63
race gas question
Was wondering what the mixture of race gas and 93doctoIs that can be safely run in our cars. I have a renntech tune if that helps any?
Or is there even a safe mixture without a map to support it?
Or is there even a safe mixture without a map to support it?
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Joined: Jul 2013
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C63 AMG
With oem tune anything beyond 95-96 is pointless
The timing can't be advanced enough to take advantage of it
Octane does not equate to energy content
It is an index of knock resistance
The higher the octane the more it can be can be compressed, ie, the hotter it can get before compression ignition
The higher the more you can advance timing towards TDC
The higher the compression the more energy when ignited
The timing can't be advanced enough to take advantage of it
Octane does not equate to energy content
It is an index of knock resistance
The higher the octane the more it can be can be compressed, ie, the hotter it can get before compression ignition
The higher the more you can advance timing towards TDC
The higher the compression the more energy when ignited
Last edited by Ingenieur; Aug 10, 2014 at 09:02 PM.
Thread Starter
Member
Joined: Dec 2013
Posts: 83
Likes: 1
2009 C63
Awesome I was thinking starting off slow with 98 and seeing how it feels than Sunoco 260gt was gonna be my next choice. I'm shocked that we don't need a tune to run race gas in our cars. Luckily I'm tuned tho so glad that'll help.
I'm only gonna try this at the track so I can get a better 60', the bog is still horrible with the m/t s.
I'm only gonna try this at the track so I can get a better 60', the bog is still horrible with the m/t s.
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Joined: Dec 2006
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From: Clifton, NJ
96 and 08 911 turbos
keep in mind that race fuels of varying types don't have the same stoich a/f as street fuel, so you'll want to tune if you are adding more than a splash (which won't help anyway on a a stock car unless its pulling timing through knock retard).
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From: San Diego
MB
With oem tune anything beyond 95-96 is pointless
The timing can't be advanced enough to take advantage of it
Octane does not equate to energy content
It is an index of knock resistance
The higher the octane the more it can be can be compressed, ie, the hotter it can get before compression ignition
The higher the more you can advance timing towards TDC
The higher the compression the more energy when ignited
The timing can't be advanced enough to take advantage of it
Octane does not equate to energy content
It is an index of knock resistance
The higher the octane the more it can be can be compressed, ie, the hotter it can get before compression ignition
The higher the more you can advance timing towards TDC
The higher the compression the more energy when ignited
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From: Texas
10 C six trizzle
lol. I like the e85 comparison tests too. How about a comparison of fuel with 10% ethanol added and fuel w/o (id really like to see that). Yes higher octane typically has less btu's or energy by volume but burns slower hence the knock resistance and needing more of it. As for fuel mileage i have no idea why a higher octane would ever yield higher mpg that's sort of counter productive. Although maybe with much higher quality fuel we'd get the lean burn benz engines that run like 28:1 afr's temporarily which do get better mpg.
