Zx23rr
Expert Class
Mahogany Bomber Pilot
Posts: 242
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posted August 28, 2003 07:12 AM
if memory serves, about 6.7 to 1 A/F ration for Methol and 8.9 to 1 for ethanol. The is the same as 14.7 to 1 with Gasoline. The bonus with the Alcohol is that its latency of heat (i think that's what it is) much greater than that of gasoline and therefore its cooling effect when evaporating will greatly increase hp. (about 10% for methanol and less for ethanol). Of course the "octane rating" - a misnomer - is much higher.
again i bruised my brain.........
  
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zx11_12
Expert Class
Posts: 207
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posted August 28, 2003 01:24 PM
 Edited By: zx11_12 on 28 Aug 2003 14:28
Qoute___damn zx11_12, i need someone like u to clear up the "straight talk about dynos" thread! good info, thanks.
i'm confused about one thing tho. how does what u said about different recipes and Amaco calling for specific specs correlate with what Y2K said about all gas bein mixed together fomr all refineries? is the final stage of refining what makes the difference?
also, re mixin of grades, what about 4 grade stations (87/98/91/94)? i was todl that when the station i worked at was gonna get 94 (still hasnt happened several years later) it woudl be a separate tank. 87/89/91 would continue to be a mix between 87 & 91
It's not so much that they are all mixed together, even in the pipeline, each batch is pumped to a specific customer. Someone else said it right about the part that intermixes being put into a holding tank and sold to a refinery who will reprocess it. What happens is that refineries have exchange agreememnts.
Lets say Brand X has a refinery in eastern KY. But they have staions spread out all over the eastern US and the Midwest. Brand B has a refinery in Chicago and also has stations in the same areas. It isn't cost effective to ship gasoline from eastern KY to the Chicago area, or visa versa. So the companies will have an agreement. For every gallon that Brand A supplies to Brand B's staions in the eastern US, Brand B will supply Brand A's stations in the midwest. All companies have these aggrements. That's usually what people mean when they talk about the gasoline being mixed up. If you live near a refinery, you can bet your shorts that every drop in your area, regardless of the brand name, came from your local refinery. It just makes sense cost wise.
Steve
Steve
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"There is only one basic human right, the right to do as you damn well please. And with it comes the only basic human duty, the duty to take the consequences."
PJ O'Rourke
 
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frEEk
Administrator
ummm... yeah
Posts: 9660
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posted August 28, 2003 02:51 PM
ah, makes sense. thx.
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flite leader
Zone Head
Posts: 651
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posted August 28, 2003 06:33 PM
the only time it really matters is at slow speeds & at idle
there is a backwash of residual combustion chamber
gases... thrash
that gets deposited on the intake valves
the 12 does have long duration cams
thats why during break in i seldom idle
i rarely do the blvd crawl
losts of crankcase thrash gets past the piston rings
under both circumstances
the pricier gas really doesnt help as much then
not any more than the other
its not enuff to remove deposits......you'd ceratinly be running tooooooo rich
& the injectors arent strong enuf to spray blast em
can you say marketing........????
2 engines run the same
maybe you would see a difference on tear down...... maybe
best cure
run decent gas.... idle as little as possible
& dont go slow
its a 12r.................. man !!!
____________
bend your mind.....
or break your ass...!!
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