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Old 11-18-2001, 07:34 PM   #26
PDG
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Member#: 11049
Join Date: Oct 2001
Location: Chelmsford, MA
Vehicle:
02 WRX, BLACK WAG
Somewhere around stage 4

Default

oh, don't get me wrong, lead + auto = bad things. I was more speaking of the oxyigation of the fuel.

We can run super leaded fuels on the motorbikes cuz we strip em down and rebuild them regularly (I guess you could do the same with a car, but defnitely not as easy.)

PDG

btw--retail for VP Fuel MR-1 is about $25/gallon.
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Old 11-18-2001, 07:38 PM   #27
bsquare
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Member#: 1911
Join Date: Jul 2000
Location: Seattle, WA, USA
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2000 Impreza 2.5RS
Silverthorn Metallic

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Lead for oxygenation? Pull the other one. People use leaded fuels because it is cheap and there is a myth surrounding it that says it performs best.

What fuel do F1 cars run currently? It used to be an 86% or so toluene mixture (with an inert fluid for the other 14%). Some minor additives because pain thinner tends to remove oil from engine parts, but definitely no lead.


Ben

Edit: To clarify, lead as an additive is cheap in comparison to other additives with similar or higher performance, not compared to pump gas.
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Old 11-18-2001, 07:42 PM   #28
z&cobb
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Join Date: Nov 2001
Chapter/Region: MAIC
Location: Mountains of Maryland
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2002 2JC
blue

Default MMT 104 Octane

Quote:
Originally posted by L8Apex
You WILL get better times if you use race gas. Try it, I have used VP in N/A cars and forced induction and have seen gains in all of them. Try and run with 4 gal. of VP C10 or better yet C12 and nothing else. The VP gas WILL lower exhaust gas temps, it WILL allow higher boost and timing. The stuff costs $7 a gallon but it works, its the best fuel (gasoline) u can buy.
The sure thing in this thread is if you have removed the stock catalysts, replaced them with one large cat and a good cat back system, and added a bigger intercooler with a higher scoop, and added an adjustable boost controller, you can make your own high octane gasoline by buying an octane booster which contains MMT. Make sure it says it has MMT in it, that's for-real stuff on the level of the old tetraethyl lead. Making the octane to suit the boost will save you big bucks when boosting to 300HP. Otherwise set the boost low and use 87 octane for 200 HP. If you get sub-par gas for some reason it is nice to turn the boost down. WRX's with the stock computer will be happy with this thoughtfulness.
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Old 11-18-2001, 07:48 PM   #29
PDG
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Somewhere around stage 4

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no no no, you're missing my point.

I'm not saying leaded fuel is oxginated, I was just simply saying that the 'power' fuel I use for race bikes happened to be leaded, but it was also highly oxyginated--two things that are not really related to each other (well, maybe in some magical chemical world I know nothing about).

The specs for the MR-1 fuel I use:

Quote:

Specific Gravity: 0.740 @ 60F

Lead, g/L: 4g/gal

Color: Clear

Research Octane: 104

Motor Octane: 90

Oxygen: 2.55

Distillation:
10% evap @ 124F
50% evap @ 180F
90% evap @ 222F
E.P. @ 254F


Production: San Antonio, Texas USA

Availability: Sealed Drums, Pails

MR-1 was designed for AMA 4 stroke competition Dyno tests have shown .5% to 4% more power over our competitors. MR-1's higher octane value helps resists detonation while allowing easier tuning.


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Old 11-18-2001, 07:58 PM   #30
bsquare
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z&cobb:

Let's be clear: TEL is a mediocre octane boosted, certainly matched or exceeded in performance by ethanol. I am extremely suspicious of MMT, particularly since ethanol can be manufactured so cheaply and is known not to pollute at all. The main reason for the continuing development of petroleum and heavy metal based octane boosters is money, and the main reason people think they work better than ethanol and other safe additives is marketing.


PDG:

I'd be interested in a performance comparison between that gas and gas forumlated using ethanol or xylene (and friends).
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