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Interesting question.
I cannot imagine that the ratios would change due to the extra load of only 200 pounds. That's the size of a passenger.
If you take that theory to its exteme you will see a change. For example, I had a V8 S10 back in the day and ran a 650cfm carb. When I decided to start using the truck to pull my car to the racetrack I found it needed a 750cfm carb for more balls. The A/F ratio took a nosedive under that much load.
How much of a change did you see?
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
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