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      01-01-2013, 11:11 PM   #24
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bigjae1976's Avatar

Drives: 11 E90 M3 Individual
Join Date: Mar 2006
Location: Wichita, KS

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Garage List
2004 BMW M3  [4.50]
2011 BMW E90 M3  [5.00]
2013 BMW 328i  [5.00]
Originally Posted by z335is View Post
Does anyone know what the general track time discrepancy is for the ZCP vs. non-ZCP cars?
It will vary tremendously from track to track. I think tracks with slow, tight turns leading onto long straights will have a greater time difference than a faster track with more sweeping corners.

At MSR Houston, there's a 3 turn complex (3-5) which comes off a long straight and then leads onto a long straight...both directions. Then one direction has a quick 2 turn switchback (9-8) leading onto a key long straight. I would guess that a ZCP car is good for an easy second. The problem I have in my E90 is just getting the power down on exit. I have to wait to get on the throttle which kills exit speed. Then the speed deficit just multiplies as you get down the straight. So 2-3 mph on exit is about 10-15mph at the start of the next braking zone.

For a faster track with lots of sweeping corners like Texas World Speedway where there's only 1 potential 2nd gear turn not in a critical area of the track then I don't think ZCP makes as much of a difference.
Attached Images
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2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red