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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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GotaT,
You asked if leaning out the idle fuel mixture screws would help your mileage on your trip from Laf to Houston.
Remember with Webers the engine runs on the secondary venturi at rpm's above 2500/3000 rpm's.
Any adjustment of the idle mixture will not affect your mileage at hiway speeds.
For better mileage at hiway speeds you'll want a smaller venturi and corresponding smaller main jets.
You want better mileage around town? Smaller venturi and smaller idle jets; then retune.
The Webers get fuel from the idle passageways to the idle and transition jets at rpm's below 2500/3000 rpm's.
You end up trading better mileage for less performance.
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DOUG
'76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's.
'85 911 Carrera, stock, just painted, Orient Red
Last edited by 2.7RACER; 05-29-2008 at 09:46 PM..
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