overlap vs drivability vs exhaust restriction
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TECH Resident
Joined: Aug 2008
Posts: 910
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From: Dubai
overlap vs drivability vs exhaust restriction Another question for my genious members lol.
I really need to understand why are our stock motor C6 Z06's (3 in total) are running (cruise - partial throttle and idle) better with 11-15 degree overlap cams with a restriction in the exhaust, in this case exhaust baffles closed vs open.
We kept trying this yesterday, opening up the valves increased the surge, and closing them smoothed the car throughout the range its definitely noticeable. We we logging using HPT as well, there was nothing changing on the scanner view however.
I for one thought it should be more like the opposite, I was thinking maybe a restrictive intake would smooth a cam's overlap, since reversion would be - by a certain amount - less.
Let me put this in one sentences:
- Does having a restrictive or less restrictive exhaust or intake smooth out drivability with a decent overlap cam.
I really need to understand why are our stock motor C6 Z06's (3 in total) are running (cruise - partial throttle and idle) better with 11-15 degree overlap cams with a restriction in the exhaust, in this case exhaust baffles closed vs open.
We kept trying this yesterday, opening up the valves increased the surge, and closing them smoothed the car throughout the range its definitely noticeable. We we logging using HPT as well, there was nothing changing on the scanner view however.
I for one thought it should be more like the opposite, I was thinking maybe a restrictive intake would smooth a cam's overlap, since reversion would be - by a certain amount - less.
Let me put this in one sentences:
- Does having a restrictive or less restrictive exhaust or intake smooth out drivability with a decent overlap cam.
