who is using the 10.5" Lower pulley? - Page 2

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2009-2015 Cadillac CTS-V Performance Mods Discussion, who is using the 10.5" Lower pulley? in Cadillac CTS-V Series Forum - 2009-2015; My tuner has a 10.5 lower and a 2.85 upper. He is at about 15 psi. But he has trick ...
  1. #16
    CavemanB52's Avatar
    CavemanB52 is offline Cadillac Owners Connoisseur
    Automobile(s): 2012 CTSV coupe
    Join Date
    Aug 2012
    My tuner has a 10.5 lower and a 2.85 upper. He is at about 15 psi. But he has trick flow heads headers and a blower spacer which brings the boost back down.

  2. #17
    Doc GTO is offline Cadillac Owners Member
    Automobile(s): 2011 CTS-V
    Join Date
    May 2013

    Re: who is using the 10.5" Lower pulley?

    Quote Originally Posted by ClarkkentCTSV View Post
    Assuming your car is an A6 your making more power at 14psi vs his 16psi. Manual cars have less drivetrain loss so should dyno about 8% higher than and automatic. So if your car was a manual you would be in the mid 580's. I know you both dynoed within two days of each other in identical weather conditions so I'm assuming your mods helped control your IAT2's better. Would love to see both vehicles data logs to see how much more efficient the cooling system works with upgrades.
    If I remember correctly, he does not have any Hx upgrades. I have the LFP lower front mount dual pass piggy backing the stocker and the LPE pump which is a modded ZL1 pump and the system is filled with distilled water and Redline water wetter. He dynoed 1st thing in the morning and I dynoed at 930pm so the temps were about the same. We both missed the heat of the day.

    I do have a Norcal tank on order whoch should help a little more on the street and a bunch at the track with icing it!

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