Looking like 11-13" is your range, I used to be 11" and it was horrible, what a mistake and made driving a bit more sketchy than it needed to be.
I'll never run factory vacuum for brakes again, I've got a 20" vacuum Hella Pump on my GTO and it stops incredible. There is a Leed vacuum pump going on my GN and that makes 24-25" and this makes an insane difference in booster psi.
2ft of stopping distance can be the difference between big bucks or thanking yourself for buying a killer vacuum setup with the saved money from the accident you just missed being in.
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69 GTO Convertible, 4000lbs
462ci, 606tq/569hp - 93 oct at 34 deg (207psi)
11.7:1, KRE H Ports, Lunati HR 282/290 w Johnson Lifters & 1.65 Scorp, E30, EFI, Holley HP + Dual Sync, 12-1 Crank Trig, 120lb Inj & 1000cfm TB, Torker II EFI Int & Rails, PTC 10" 0 Stat, Ricks SS Gas Tank, Magna 4303, Aerom EFI Reg, Aero Front & Wilwood Rear Disc Brakes, Dougs 1 7/8" Headers & Borla Pro XS 3" Muffs, Alum Rad & Dual Fans, 12:1 Box, UMI Control Arms & Viking Berz Fr + Rear CO Shocks, Hella UP28 Vac Pump
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