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#1
10-28-2007, 02:35 AM
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Air/Fuel Ratio VS. Horsepower
Let's say you have a Pontiac 455 that's built for 500 HP. Engine runs great, but
tail pipes are soot black. How much Horsepower could one be off because of A/F Ratio? (Rochester Q-Jet for Carb.) Thanks, David |
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#2
10-28-2007, 05:23 AM
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You can lose as much as 10% depending on how rich it is. But black soot on the tailpipes doesn't mean it's necessarily over-rich under wot. You need to read the spark plugs, monitor a/f ratios and/or exhaust gas temps.
__________________
"The Mustang's front end is problematic... get yourself a Firebird." - Red Forman |
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#3
10-28-2007, 09:48 AM
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Could be the power spring for the metering rods isn't right and rich at idle
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#4
10-29-2007, 08:03 AM
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Are you loosing any oil? Does the PCV valve have oil in it?
I had the same problem with my 350. Wound up having bad machine work, oval cyclinder walls.
__________________
Can do the talk, can't do the walk......therefore need deep pockets  Injection is nice but I rather be blown  If you got it flaunt it, if not fake it (Snoopy) Original 1977 Firebird / Welded tube frame connectors TH350 with shift kit / 400 bored/stroked to 455 by PDude OCD=Waxing and polishing your oil filter SICK=wetsanding your exhaust pipe |
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