Quote:
Originally Posted by mpathic
Catching up on ZPost threads.
For B Street, start with
Use the largest front swaybar you can find. I'm using the H&R 31. An unlimited budget would go with a hollow tube bar to save a few pounds. Need to use stock swaybar links, and expect they break sooner or later so carry spares.
Koni DA rear shocks, listed for the Ford Mustang. Saves $$$ vs E46 versions, has the unicorn top adjuster for rebound and an indexed click screw on the bottom of the body for rebound.
Koni SA 'cut a strut' style front struts listed for E36, installed in E36 //M3 strut tubes for the same installed spring height. Will need to cut 10mm off the bottom of the upper strut mount to fit the Koni threaded shaft through the E85/6M upper strut mount.
See: for pictorial of this strut adaptation.
Battery: Use a small light race battery.
Exhaust: remove the rear resonator and x-pipe. Also removes some weight. Replace with 2.5" x-pipe, round out the square pipe end sections using a pipe expander. Then you learn that the factory mufflers flow great, its that awful resonator and pinching x-pipe that's the real flow problem.
Any air filter can be used. I like the Pipercross over the K&N.
Spark plugs: single electrode NGK DCPR8EIX installed with the opening toward the intake valves.
Oils: Redline.
Empty the washer fluid bottle for less weight.
Extremists will use worn thin rotors and brake pads, and titanium lug bolts.
Wheels: Lightest you can find, with as little offset as the rules allow or use spacers. DForce and Apex don't make an 18x8 so you need to search old stuff. I found a set of old very light stock size SSR Integrals with 40mm front offset, and 26mm rear offset. Will use 5mm front spacer.
hth, good luck.
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End links are considered part of the sway bar and you don't have to use stock end links on the one sway bar you're allowed to modify or replace. See paragraph 13.7 of current rules.
"13.7 ANTI-ROLL (SWAY) BARS
A. Substitution, addition, or removal of a single anti-roll bar and supporting hardware (brackets,
endlinks, bushings, etc.) is permitted."
You can't change to a "race" battery in Street. You have to use an OEM equivalent battery. Same size, type, weight, location and mounting type. The only change you can make is the addition of hold down hardware if added support is needed. Street Touring is the first class where changing the battery is actually allowed. Paragraph 14 is Street Touring. Also note that Z4Ms are not allowed in Street Touring. If you make a mod that's beyond what Street allows, the you skip ST and move to Street Prepared.
"14.9 ELECTRICAL SYSTEM
A. The make, model number, and size of the battery may be changed but not its voltage. Relocation of the battery or batteries is permitted but not into the passenger compartment. If the battery is relocated and the original battery tray can be removed by simply unbolting it, the tray may be reŽmoved."