racefuel
#4
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2016 S63, 2013 SL63
Lead and MTBE! Great stuff.
highly oxygenated (MTBE) makes more HP for sure but you must tune for it and larger injectors might be needed. Very expensive fuel. I used to buy it 54 gallons at a time.
Then E85 came out. We make the same HP with it now and it's 1.75 a gallon vs 19.00 a gallon. Miss the smell though. Kind of a mix of cotton candy and Red Bull.
highly oxygenated (MTBE) makes more HP for sure but you must tune for it and larger injectors might be needed. Very expensive fuel. I used to buy it 54 gallons at a time.
Then E85 came out. We make the same HP with it now and it's 1.75 a gallon vs 19.00 a gallon. Miss the smell though. Kind of a mix of cotton candy and Red Bull.
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#8
MBWorld Fanatic!
Do not use. The label clearly says "CAUTION - Contains Tetraethyl Lead". That will kill your cats.
Here's the intro to a really good article about different fuel choices and how they impact performance.
There are a lot of myths surrounding the various types of gasoline we use in our street and race cars. Which one will help us get the most power? Which one is the best bang for the buck? Do we really need race gas? If so, which type? There’s precious little data to back up many of the claims we’ve seen touted as the gospel truth, so we figured it was time to shine the light of knowledge and science on those guesses and half-truths.
https://grassrootsmotorsports.com/articles/fuel-truth/
Here's the intro to a really good article about different fuel choices and how they impact performance.
There are a lot of myths surrounding the various types of gasoline we use in our street and race cars. Which one will help us get the most power? Which one is the best bang for the buck? Do we really need race gas? If so, which type? There’s precious little data to back up many of the claims we’ve seen touted as the gospel truth, so we figured it was time to shine the light of knowledge and science on those guesses and half-truths.
https://grassrootsmotorsports.com/articles/fuel-truth/
#11
Super Member
Use an equal mix of MS109/93oct on your last two gallons of gas. Run the car hard until you are ready for your next fill up. Then add in MS109 purely, the computer should adjust timing a bit.
Again if you want to get the full advantage of any race fuel get tuned for it. Using the method above will net you a mild gain in horsepower.
Again if you want to get the full advantage of any race fuel get tuned for it. Using the method above will net you a mild gain in horsepower.
#12
MBWorld Fanatic!
Who is this guy?
You're starting ridiculous / broad threads that have been covered many times. Such as the header thread.
You're starting ridiculous / broad threads that have been covered many times. Such as the header thread.
#13
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Join Date: Jun 2008
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Don't feed. He'll go away.
#17
MBWorld Fanatic!
https://mbworld.org/forums/c63-amg-w204/550772-e85.html (thread literally halfway down the page)
Don't use it, there is no point for us.
Don't use it, there is no point for us.
#20
MBWorld Fanatic!
Re E85, from the Grassrootsmotorsport link above where they dyno tested seven or eight different fuels (notes in parenthesis are mine):
"The E85 is a highly oxygenated fuel. A considerably greater amount is required for it to run correctly at the optimal air/fuel ratio. How much greater? Try an average of 63 percent more fuel at the same rpm and load. (With larger injectors,) All that extra fuel did allow us to bump the timing by 2 degrees. We saw an additional 7 horsepower over baseline (about 5%), with a corresponding gain of 4 points in torque (about 3%).
TAKE-HOME MESSAGE: Possibly one of the least expensive horsepower gains per dollar we’ve seen, but only if you can tune for it . . ."
More at https://grassrootsmotorsports.com/articles/fuel-truth/
"The E85 is a highly oxygenated fuel. A considerably greater amount is required for it to run correctly at the optimal air/fuel ratio. How much greater? Try an average of 63 percent more fuel at the same rpm and load. (With larger injectors,) All that extra fuel did allow us to bump the timing by 2 degrees. We saw an additional 7 horsepower over baseline (about 5%), with a corresponding gain of 4 points in torque (about 3%).
TAKE-HOME MESSAGE: Possibly one of the least expensive horsepower gains per dollar we’ve seen, but only if you can tune for it . . ."
More at https://grassrootsmotorsports.com/articles/fuel-truth/
#21
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2016 S63, 2013 SL63
Nope they are wrong. E85 even though it carries Oxygen molecules, they don't release O2 to aid in combustion.
MTBE "cracks" the alcohol that releases the O2 to aid in combustion.
MTBE "cracks" the alcohol that releases the O2 to aid in combustion.
#22
MBWorld Fanatic!
Re E85, from the Grassrootsmotorsport link above where they dyno tested seven or eight different fuels (notes in parenthesis are mine):
"The E85 is a highly oxygenated fuel. A considerably greater amount is required for it to run correctly at the optimal air/fuel ratio. How much greater? Try an average of 63 percent more fuel at the same rpm and load. (With larger injectors,) All that extra fuel did allow us to bump the timing by 2 degrees. We saw an additional 7 horsepower over baseline (about 5%), with a corresponding gain of 4 points in torque (about 3%).
TAKE-HOME MESSAGE: Possibly one of the least expensive horsepower gains per dollar we’ve seen, but only if you can tune for it . . ."
More at https://grassrootsmotorsports.com/articles/fuel-truth/
"The E85 is a highly oxygenated fuel. A considerably greater amount is required for it to run correctly at the optimal air/fuel ratio. How much greater? Try an average of 63 percent more fuel at the same rpm and load. (With larger injectors,) All that extra fuel did allow us to bump the timing by 2 degrees. We saw an additional 7 horsepower over baseline (about 5%), with a corresponding gain of 4 points in torque (about 3%).
TAKE-HOME MESSAGE: Possibly one of the least expensive horsepower gains per dollar we’ve seen, but only if you can tune for it . . ."
More at https://grassrootsmotorsports.com/articles/fuel-truth/