Mine stumbles around 500 rpm on the tach when I first start up. I always need to give it throttle until it warms up. That is where the good 1500 idle is present. I am happy with the higher idle as the engine runs smoother there.
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911S
1971 chassis, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
http://www.flickr.com/photos/max_911_fahrer/
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