997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
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91, 93 & 100 Octane - Who's using what?

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Old Jun 27, 2010 | 10:28 AM
  #31  
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Sorry, I thought you were referring to the octane booster since it's hard to imagine how a lubricant additive could produce any significant gains in power.
 
Old Jun 27, 2010 | 10:45 AM
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Old Jun 27, 2010 | 10:51 PM
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Running E85 Ethanol - 100% of the time. To keep everything stock it was quite a job to convert the car over. I'll post a large thread soon.

No more MS109 at $12+ a gallon. Now I pay $2.39 a gallon and I use it as a daily driver and can run 30 psi (2.1 bar) if I choose to. On the street I keep it at 1.5 bar all the time. If I need high boost I just push the "high" boost setting on the Profec and its "all there" all the time - anytime.

As I see it, why spend all this money on mods to run mostly 93 octane at a comprmised power level? Its a waste in my eyes.

Preliminary tests are showing that we can run more ignition timing with E85 then with MS109 - due to the extreme cooling effect of E85. I will post tests and results soon.

Keith
 

Last edited by keithta; Jun 27, 2010 at 10:53 PM.
Old Jun 28, 2010 | 10:40 AM
  #34  
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Finally, I knew there had to be somebody that switched to E85 on this forum. Cant wait for the test results. Like I said before, Ive seen huge gains on other turbo'd cars using E85.
 
Old Jun 28, 2010 | 09:40 PM
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yes yes I 100% agree and would like to learn more about conversion and costs...

Super high octane cheap!

There are E85 stations popping up all over the island...and existing fueling stations like Sunoco and all the others as well.
 
Old Jul 2, 2010 | 12:42 PM
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Originally Posted by Siglo Man
Just curious what is being used out there. I just had the GIAC mod done with exhaust and I'm pretty sure I have the 91/100 flash. I just realized there is a 93/100 version and since I have a race fuel station 2 min from my house I was really curious what hp increases could be achieved by having the 93 octane as my base setting. Also curious of the gain using the 100 setting with 100 octane. I'm sure ECU/exhaust combos will of course vary but I am hoping for some insight on this. I have inquired with GIAC but was also hoping for some real world testimonials.
You might PM QUIK911 and get some information on his methanol setup. It is much more economical than filling up with race fuel but produces the same results. He can run his AWE race file on 91/meth. You can see the differences of his here:



516whp/517wtq on straight 91 with his AWE 750R kit



590awhp/58x awtq on 91+ his alky meth kit.

I will shoot you a PM with some thoughts on this as you are local to us.
 
Old Jul 2, 2010 | 12:48 PM
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Originally Posted by 997TTurbo
I have a pure stock 2007 Turbo, manual. Will using this race fuel provide any benefits or does it only help with cars that have been modified?
Bone stock 997Ts will show a bit of knock on OEM software and increasing octane will increase stability (the cars are tuned for a minimum of 98RON). The dollar/hp figure of adding 100 octane with factory software is not great, though. It is generally with 5-10hp deviations.
 
Old Jul 2, 2010 | 05:18 PM
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A Water/Meth kit once tuned is a great way to get more octane and knock prevention at a reasonable cost. Some crazies even run 100% Meth on the kits and this will work BUT, pure methanol is very corrosive and has toxic (cancer) properties from repeated exposure; as well as a very low flash and evaporation point.

Plus with the new Direct injection motors, the kit will also clean the intake tract as well as the tops of the intake valves which can have a buildup of crap over time. The Audi 4.2 FSI motor were the worst for the buildup.
 
Old Jul 2, 2010 | 05:42 PM
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Originally Posted by Bigrigger
A Water/Meth kit once tuned is a great way to get more octane and knock prevention at a reasonable cost. Some crazies even run 100% Meth on the kits and this will work BUT, pure methanol is very corrosive and has toxic (cancer) properties from repeated exposure; as well as a very low flash and evaporation point.

Plus with the new Direct injection motors, the kit will also clean the intake tract as well as the tops of the intake valves which can have a buildup of crap over time. The Audi 4.2 FSI motor were the worst for the buildup.
Methanol is neither corrosive nor considered a carcinogen. Just clarifying.
 
Old Jul 2, 2010 | 08:44 PM
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Originally Posted by TTdude
Methanol is neither corrosive nor considered a carcinogen. Just clarifying.
But don't drink it anyway.
 
Old Jul 2, 2010 | 09:05 PM
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Originally Posted by TTdude
Methanol is neither corrosive nor considered a carcinogen. Just clarifying.
http://avogadro.chem.iastate.edu/MSDS/methanol.htm

Section 3 and 11. Just so you know, mutagentic is another word for cancer as well.

I work frontline oilpatch in Alberta and in winter we use lots of it everyday, and I mean gallons. There is no feeling in the world like getting a splash of meth on your skin when its -40C outside.

As for corrosive.

http://e85.whipnet.net/yellow/m85.2.html Plus ive seen what it does to rubber and composite seals as well as certain alloys. Its corrosive

It will eat lots of stuff slowly and surely.
 

Last edited by Bigrigger; Jul 2, 2010 at 09:09 PM.
Old Jul 2, 2010 | 09:31 PM
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Wow and they add that stuff to cigarettes for flavour...
 
Old Jul 2, 2010 | 09:44 PM
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93 Shell in my Switzer P800 setting and C16 on the R911 setting. I have not tried the race gas setting yet but on pump she feels alot..I mean alot faster than my 2010 PDK.
 
Old Jul 2, 2010 | 10:36 PM
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I consistently use Sunoco Ultra93 gas. Here in Mass, Sunoco is the only major gas retailer selling 93 octane gas, AFAIK. Makes me feel a bit better giving my gas moneys to an oil company rating at the very top for its environmental record among oil majors. Sierra club sez so

http://www.sierraclub.org/sierra/pickyourpoison/
 
Old Jul 3, 2010 | 12:19 AM
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Originally Posted by Bigrigger
http://avogadro.chem.iastate.edu/MSDS/methanol.htm

Section 3 and 11. Just so you know, mutagentic is another word for cancer as well.

I work frontline oilpatch in Alberta and in winter we use lots of it everyday, and I mean gallons. There is no feeling in the world like getting a splash of meth on your skin when its -40C outside.

As for corrosive.

http://e85.whipnet.net/yellow/m85.2.html Plus ive seen what it does to rubber and composite seals as well as certain alloys. Its corrosive

It will eat lots of stuff slowly and surely.
It depends on your definition of corrosive. Strictly speaking, methanol is not considered a corrosive agent. Strong acids are considered corrosive. Next time a shipment of methanol comes in take a look at the DOT classification. It is classified as 3 (flammable) not 8 (corrosive). It even says this in the msds you linked to.

Methanol is toxic and care should be taken when handling but it is NOT considered a carcinogen by OSHA, NIOSHA, and CA Prop 65 (this is also stated in the msds you linked to). Whether it is truly a mutagen, that's debatable. You can turn almost any chemical into a mutagen/carcinogen in laboratory setting when you expose them to mega amounts of the stuff. That fact that it is not listed as a carcinogen by OSHA, NIOSHA and CA prop 65 is proof of that. If you spill some on your hands, you're not going to go blind or get cancer but will evidently sting you at -40C. Not trying to be difficult here, just want to dispel any myths.
 

Last edited by TTdude; Jul 3, 2010 at 01:30 AM.


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