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Old 01-22-2017, 07:43 PM   #95
Zeke.Malvo

 
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Drives: 1969 Mustang MaCh1
Join Date: Nov 2015
Location: SJ
Posts: 835
Quote:
Originally Posted by DrkPhx View Post
I alluded to it in my previous post. It has 3.31 rear gears (M6 ZL1 has 3.73) Ford changed the transmission gearing in the 13-14 GT500 to help with mpg (and hit 202 mph) to avoid the GG.
Right, but that's not really a big enough difference to account for being down 4 mpg on the highway. Not when the ZL1 is a newer more modern engine, has variable valve timing, and better aerodynamics.
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1969 Pro-Touring MaCh 1 - CHP 427w 10.8 comp - 3140 lbs. - 460 rwhp / 490 rwtq
T56 Magnum || 14" 6 piston front / 13" 4 piston rear Wilwood brakes || Hydraulic clutch || 9" Detroit Locker || TCP Coilovers || Forgeline Wheels 18x10 275/35 front, 19x12 325/30 rear
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