Fuel System

Model: 930, Year:1987, Mileage:67K, Type of use:Street use only
In regards to wide open throttle WOR what is meant by do not approach anything higher than 12 - 12.3 AFR.What does the acronym AFR mean?

Model: Twin Turbo, Year:1997, Mileage:7300, Type of use:Street use only

Model: 911 turbo, Year:1977, Mileage:46000, Type of use:Both Street & Track
I have a 77 930 with origional turbocharger. Starting to see some smoke while on the turbo. Wanted to rebuild or replace seals while I have turbo on the bench for exhaust replacment. Have been told to upgrade to K27 but I do not intend to add intercooler. Current origional still makes plenty of boost. Should I upgrade?

Vehicle Information: Year: 1984; Engine (Size, Modifications): 3.3; Total Mileage: 37,000;

Vehicle Information: Year: 2003; Engine (Size, Modifications): stock 996 twin turbo; Total Mileage: 8000;

are you aware of fuel pump hose failures on 996 twin turbos/GT2s? (rupture of the hose from the pump, so the fuel just recirculates into the fuel tank with none going to the engine)

Vehicle Information: Year: 2001; Engine (Size, Modifications): 3.6; Total Mileage: 11,000;

lately the 2001 996tt fails to start. it cranks but wont start. it also studders at low rpms esp with start in first gear. cold starts are perfect.

Vehicle Information: Year: 1982; Engine (Size, Modifications): 3.3; Total Mileage: 149,000 km;

I have recently noticed that if I give the accellerator pedal a quick rev from idle there is a pronounced click noise that appears to come from below the throttle body. I had it looked at quick by an experienced mechanic. He felt it had to do with a worn rubber o-ring at the bottom of the trottle body and that the click noise was a metal to metal noise when opened quickly. Do you agree? If so is it a difficult fix? I am mechanically inclined but have little 930 experience.

Vehicle Information: Year: 1979; Engine (Size, Modifications): 3.3; Total Mileage: 94,000;

Vehicle Information: Year: 1979; Engine (Size, Modifications): 3.3 Turbo; Total Mileage: 95,000;

Can you fax me the specs for the fuel system? I have a new rebuild that runs great till it warms up,. I have checked the ignition at warm-up, it is working good ,which leaves me to the fuel system.....Thank You ....Rick

Vehicle Information: Year: 1984; Engine (Size, Modifications): 3.3, Electromotive XDi ignition; Total Mileage: 37,000;

I've just puchased a 1984 Turbo and noticed it goes into a high idle even when it is fully warmed up (2,000+ for a minute or so, then comes down to normal RPM). I own a few 3.2 Carreras but never owned a Turbo before. Is this normal? If not, is auxiliary air regulator a culprit? Otherwise the car starts/idles/accelerates very very well.