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Gearing becomes much less of an issue when you have more transmission gears - the new 8 speed autos have 6 non-overdrive gears, 1st gear is usually 4.5:1 or better!
Neither the ZL1 nor Z28 have top speeds exceeding 180mph, meaning that they are geared pretty darn good from Chevy from the get-go.
Bill, you are correct that a 118mph trap speed is pretty close to the 120.5mph theoretical trap speed that the ZL1 should have. Problem is when you see a 114mph trap speed, it is not putting out 580hp.
If the trap speed is a few mph off from the theoretical, all is good - could be friction, traction, gearing... But when its off 5 or 10mph, then there is a disconnect that needs to be explained.
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1984 Camaro: 350 Auto, Global West Suspension, Baer Brakes, CTW Wheels
1989 GTA: Bolt-on L98. Global West Suspension, full Magnaflow exhaust, Wilwood Brakes, CTW Wheels
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