steem vent, 2 or 4 port
It'll be a while before that runs. Tuning is almost there on the Z06, I was working 6-7 days a week for the past 3 months. I'll send you a message if we take them out for a drive your way. 
Whether it makes a difference, I'm adding the rear steam ports to mine. It just makes sense to, the rear cylinders do run hotter so any little bit helps. It does not run hotter because its missing the ports however, it runs hotter in the rear because the rear gets more air than the front because of manifold design......thats my theory anyway...lol
TECH Resident
Joined: Jul 2007
Posts: 967
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From: Winter Haven FL
Whether it makes a difference, I'm adding the rear steam ports to mine. It just makes sense to, the rear cylinders do run hotter so any little bit helps. It does not run hotter because its missing the ports however, it runs hotter in the rear because the rear gets more air than the front because of manifold design......thats my theory anyway...lol
Rear cylinders run lean so they're hotter inside and in most applications they're shrouded by the cowl/firewall which prevents air flow over the outside. It's a double whammy of heat issues. Adding steam vents allows more coolant to flow through the area which helps a little. It's not a big help, but every little bit is beneficial.
