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10-28-2005, 06:19 PM
| #1 (permalink) |
| decaf is for kids  Join Date: Sep 2004 Location: Etobicoke
Posts: 408
| Yet another octane boost thread I have been reading into octane booster lately, and can't seem to find much information regarding the negative aspect of MMT methylcyclopentadienyl. I am interested as some people i have heard mention that the stuff is no good? For example: (I got this from http://www.neowin.net/forum/lofivers...ex.php/t367026 MMT stands for–try this tongue twister: methylcyclopentadienyl manganese tricarbonyl. Once viewed as a possible replacement for TEL, while not as potent, it still increases octane and, in large quantities, can eliminate valve seat recession. While it’s used in Canada, MMT is ignored by refiners in the U.S. in favor of other antidetonants, mainly because it’s illegal in areas where RFG is required and a few refiners feel its long-term use might compromise engine life. MMT is shunned by car companies due to durability concerns about components in on-board diagnostic and emissions control systems and questioned by the EPA as a possible health hazard. Nevertheless, in 1995, MMT was allowed on the U.S. market with some restrictions after its manufacturer won a Federal court case against the EPA. At this writing almost no U.S. refiners add MMT to gasoline, but it is the key ingredient in a few canned octane boosters. The article goes on to state: If you “read” spark plugs to tune your engine, the redish-brown MMT residue makes useful readings impossible. Levels of MMT octane boosters just moderately beyond the recommendations of booster manufacturers will foul spark plugs, damage oxygen sensors (O2S) and plug catylitic converters. High percentages of MMT contaminates engine oil and leaves hard metallic deposits in the combustion chambers, piston tops and upper end of the cylinder walls such that engine wear is greatly accelerated. Do not use them in concentrations higher than suggested by their manufacturers. That some automotive manufacturers believe MMT causes problems with the second generation on-board diagnostics (OBD 2) on ’96 or vehicles has us concerned about long-term use of MMT boosters in OBD2 engines. We would not use a MMT octane booster in a Corvette with OBD2. In fact, we’re not even comfortable with long-term, regular use in any engine with 02Ses and cats, OBD2 or otherwise. What's everyones take on this - I know, I know, most of you will say "use alky" or "put the car on the bottle",  but if this is not an option, nor is race gas, what options are there? MMT or no?What do the  one's have to say about the subject?Andrew 
__________________ probability is fundamental, uncertainty is inevitable |
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10-28-2005, 06:26 PM
| #2 (permalink) |
| An American American  Join Date: Sep 2000 Location: East of Eden, Texas
Posts: 36,871
| the commercial boosters that use this are far too diluted to be of benefit. Then, it screws up the plugs and can make it misfire. If you want to use something to raise the octane, use xylene or toluene...economics are far better than commercial stuff for the most part. Xylene and Toluene are already present in gasolines...a lot more in race gases than in pump gas, but, it is there.
__________________ ------------------ 'A government that is big enough to give you everything you want, is also big enough to take away everything you have.' - Thomas Jefferson I think one should worry more when people are lining up to get out of a country rather than into it. If they're sneaking in, we must be doing something right. The Chronicles of Zap, from the early 21st century www.vortexbuicks-etc.com   |
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10-28-2005, 07:32 PM
| #3 (permalink) | |
| decaf is for kids Join Date: Sep 2004 Location: Etobicoke
Posts: 408
| Quote:
) to add to my cauldron  I guess using stuff like 104 is a waste of time? The MMT dose more harm in the long run, than good.... Other than other "octane boosters" like this stuff called Freedom Fuel additive (it has a high % of xylene in it and it also cost a good $$) -is xylene available just on its own to the general public? -Andrew
__________________ probability is fundamental, uncertainty is inevitable Last edited by kaptinkafeen : 10-28-2005 at 07:56 PM. | |
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10-28-2005, 07:57 PM
| #4 (permalink) |
| An American American Join Date: Sep 2000 Location: East of Eden, Texas
Posts: 36,871
| If you read the can it says 104 raises the octane a few points...what this means is from 93.0 to 93.4 for instance. Xylene and toluene are available in most paint departments by the gallon and five gallon...price varies a bit...shop around. Plenty of discussions on this board and article on gnttype.org. Xylene is 117 octane and I believe toluene is more like 114? Depending upon how much boost you need, people use up to 30% by volume...more than 10% should be accompanied by a small amount of oil to maintain the lubricity of the fuel. Again, read the articles and do a search...look particularly for threads with Captain Insaneo or similar...he works in fuel labs.
__________________ ------------------ 'A government that is big enough to give you everything you want, is also big enough to take away everything you have.' - Thomas Jefferson I think one should worry more when people are lining up to get out of a country rather than into it. If they're sneaking in, we must be doing something right. The Chronicles of Zap, from the early 21st century www.vortexbuicks-etc.com |
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10-28-2005, 08:07 PM
| #5 (permalink) |
| decaf is for kids Join Date: Sep 2004 Location: Etobicoke
Posts: 408
| Thank's Steve. but Xylene and toluene are available in most paint departments by the gallon and five gallon...price varies a bit...shop around, Is this how I would ask for the product? WOuld the clerk at HomeDepot or any other hardware store know what I am asking for? Is it like buying laquer thinner?, just pick it off the shelf..... -Andrew
__________________ probability is fundamental, uncertainty is inevitable |
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10-29-2005, 02:07 PM
| #8 (permalink) |
| decaf is for kids Join Date: Sep 2004 Location: Etobicoke
Posts: 408
| Thank you gents  What type fuel/xylene ratio am I looking at while running 20lb boost? I don't want to remove all the lubricating properties of the gas..... -Andrew
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10-29-2005, 02:35 PM
| #9 (permalink) |
| lag,what is that?  Join Date: Sep 2003
Posts: 2,710
| 1 gal. xylene to 3 gal. 93 octane and add 1oz. marvel mystery oil per gal. of xylene used for lubrication,this will get you 99 octane. There is a formula posted somewhere,maybe do a search to find it. 
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10-29-2005, 03:33 PM
| #10 (permalink) |
| Too many black cars!  Join Date: Sep 2000 Location: Fort Collins, CO USA
Posts: 363
| http://www.gnttype.org/techarea/misc/octanebooster.html http://www.gnttype.org/techarea/misc/Octanemix.html http://www.gnttype.org/techarea/misc...explained.html
__________________ moderator:GN/TType Enthusiast Organization 1987 Buick GN original owner 2005 Pontiac GTO LS2 6M Phantom Black 2005 Volvo V50 T5 AWD Stone Black 2006 Trailblazer SS Red Jewel Tint AWD |
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