pcv and thermostats for street strip cars ?
You don't think so what?
My motor is the same way... If I come up to the line below 160, it'll run almost a tenth faster than it would if it's over 160.
If I come up under 160, at the end of the run it's around 180. If I come up over 160, at the end of the run it's over 200.
If I come up when it's cold, say 140 or so, it'll bog off the line.
I've got a 160 thermostat in there, that could have something to do with the 160 mark.