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      03-15-2012, 08:59 PM   #1
kklin
Second Lieutenant
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Drives: BMW Z4 M Coupe
Join Date: Jul 2011
Location: PA

iTrader: (1)

kklin's Z4 M Coupe for SCCA BSP (road tire)

I'm documenting what will be mostly handling modifications I am making to my 2008 Z4 M Coupe for SCCA BSP. Our Philadelphia region has a local Road Tire PAX for SP cars, so I will be driving street tires again.

Just like the 1998 M3/4 that I ran in AS, BS, BSP, and STU for about 12 years, it will be set up mainly as a reasonably comfortable daily street car with modest autocross intentions. The main concession to a factory setup for autocross is with going to larger front contact patch with more negative camber.

The BSP modifications planned are:
  • 15.2 - Bodywork
    A. Fenders were lightly rolled, just in case. So far this has proven to been unnecessary. (Done - March)
  • 15.3 - Tires
    Front: Dunlop Z1 Star Specs 265/35 18. (Done - March)
    Rear: Dunlop Z1 Star Specs 275/35 18. (Done - July)
  • 15.4 - Wheels
    A. Apex ARC-8 18x9.5 35 on all 4 corners from the recent group buy. (Done - March)
    B. Vorshlag 75mm wheel studs and bolts. (Done - March)
    C. 5mm H&R spacers in front. (Done - March)
    D. 5mm H&R spacers in rear for upgrade to 275 tires (Done - July). No spacers needed for the rear with 265/35 18 (March)
  • 15.5 - Shock Absorbers
    C. AST 4150s are on order. (ETA - March/April)
  • 15.8 - Suspension
    F. Camber plates will be installed along with the ASTs. (ETA - March/April)
My remaining posts will include pictures and details when I can get to them.

Last edited by kklin; 07-15-2012 at 04:32 PM.. Reason: July 15 tire update
Appreciate 0