The cold advance should net you about 900-1000 RPM when cold. I don't know the test method, sorry. But you might want to contact Dave Breggin at BlueHummer.com. He's pretty good with the older N/A's.
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1999 AMGeneral H1 6.5TD BLACK Wagon e-Lockers Front and Back, Rubberduck4x4 RockTubes, Extended Undercarriage Protection,"Big Duck" 2" body lift/2 1/2" suspension lift, 41" IROK Radials on 17" Cepeks w/Rock Rims, (in process)Centered front diff, 3.08 gears, 12k Brakes and 12k halfshafts
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