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11-10-2007, 06:36 PM
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#1 (permalink) |
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Registered User
Join Date: Jul 2007
Location: Amsterdam
Posts: 736
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Race Gas and SC
Just wondering...
I know race gas add power for turbo charged cars. See for instance post #12 in http://www.elisetalk.com/forums/showthread.php?t=22741 Does this also apply to supercharged cars? Enrico
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Enrico '06 Laser Blue/Magnolia Lotus Elise * BOE TVS SC * EFI * Lots of other things '07 Graphite Grey/Tan BMW 335i w/JB3 tune, Helix IC and BMS DCI |
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11-10-2007, 06:57 PM
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#2 (permalink) | |
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Registered User
Join Date: Jun 2006
Location: Silicon Valley
Posts: 1,044
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Quote:
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2005 Elise 250 whp | Forcedfed Custom Intercooled Supercharger | EFI | Forcedfed Street Header | Fujita CAI | TB Bypass | Toda flywheel | ACT HD Clutch | Forcedfed Prototype Exhaust | Micromirror | Forcedfed Half Carbon Splitter | Greddy Catch Can | ForcedFed Engine Damper |
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11-10-2007, 07:12 PM
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#3 (permalink) | |
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Drunk on alcohol
Join Date: Feb 2007
Location: Los Angeles, CA
Posts: 3,133
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Quote:
+1. If you're at the track, always good to add some race gas in the mix so your engine doesn't knock.
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11-11-2007, 09:49 AM
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#4 (permalink) |
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Registered User
Join Date: Feb 2006
Posts: 1,373
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Race fuels CAN add power without tuning. Notice I said "can". It all depends. It can carry oxygen for instance. Then there's heat of vaporization. This means a cooler intake charge. Then there's the energy content in BTUs. Most of the fuels burn faster than pump gas. The idea is to get the maximum cylinder pressure at about 10 degrees after tdc. Faster burning fuel means less timing required before tdc. Trying to push a piston down while it's on the up stroke is counter productive. Also, the specific gravity of fuels vary widely. One may lean your engine out and another may richen it. That in itself can help you, hurt you, or do neither. VP fuels have 16 different unleaded fuels. There's much much more to fuels than just octane numbers. Consider that a typical race fuel might have 200 different compounds in a specific percentage of each. Another may be altogether different. The burn characteristics will be quite different. Avoid getting your info from those who giver simple answers to a complex situation. Get a copy of High Performance Automotive Fuels and Fluids by Jeff Hartman. That will get you started on the right track. Ask VP Fuels to send you a product guide.
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