Originally Posted by Maxwell
we are not talking about drag cars, this is a street car.
A supercharged road racer would sound very similar only without the big scoop hanging out the hood. The point of that video was to show you that a supercharged cam
CAN have a lope contrary to what you believe since that is what the debate is all about.
Originally Posted by Maxwell
...from what I understand it's the lobe overlapp time which dictates if a cam is going to have a lopey idle...
...NOw why does my N/A M112 motor, idle smooth as silk at 500rpm, while this guys SC m112 sound so lopy at 500rpm? Maybe he has a vacuum leak.? because I know the boost cam will not creat a lopy effect, the schricks cams do have more lift, but they are a custom grind and are not listed in their catalouge, which also makes me wonder about the design or if this guy has the correct cams installed.
Yes lobe separation (not lobe overlap as you called it and it is measured in degrees not time) is the primary factor in a smooth or rough idling engine. Lift and duration also play a part in this too.
If there was a vacuum leak the car would be running terrible and would probably trip a CEL.
FYI your car is idling too high if it is at 500RPM when its up to operating temps. Pay closer attention to the tach. Look at the attachment, the line at idle is more like 225-350 RPM.