This post in this thread will be intended for essential mods, upgrades, tips, etc. You will find all of what's needed to know about this car here...
Associated Big Bore Rear Spring Rates: - The springs in italics are the "most" commonly used springs for the b4.2
• ASC91335 - 12mm Rear Spring (Black/1.90lbs)
• ASC91336 - 12mm Rear Spring (Green/2.00lbs)
• ASC91337 - 12mm Rear Spring (White/2.10lbs)
• ASC91338 - 12mm Rear Spring (Gray/2.20lbs)
• ASC91339 - 12mm Rear Spring (Blue/2.30lbs)
• ASC91340 - 12mm Rear Spring (Yellow/2.40lbs)
Associated Big Bore Front Spring Rates:
• ASC91325 - 12mm Front Spring (Brown/2.85lbs)
• ASC91326 - 12mm Front Spring (Black/3.00lbs)
• ASC91327 - 12mm Front Spring (Green/3.15lbs)
• ASC91328 - 12mm Front Spring (White/3.30lbs)
• ASC91329 - 12mm Front Spring (Gray/3.45lbs)
• ASC91330 - 12mm Front Spring (Blue/3.60lbs)
• ASC91331 - 12mm Front Spring (Yellow/3.75lbs)
• ASC91332 - 12mm Front Spring (Red/3.90lbs)
• ASC91333 - 12mm Front Spring (Orange/4.05lbs)
• ASC91334 - 12mm Front Spring (Purple/4.20lbs)
Gearing starting points by motor/track type
Small Track:
17.5 - 69/30-32
Medium Track:
7.5 - 78/22-24
Large Track:
7.5 - 81/22
Popular upgrades:
JConcepts
JConcepts Aluminum Rear Wing Mounts
JConcepts Battery Hold Down Thumb Screws
JConcepts Monroe Battery Brace
Essential Mods:
Grub Screw for Rear Hubs:
This should eliminate all slop associated with the rear hubs becoming "loose"
Tools Needed:
Dubro Tap set
4-40 grub screw
1. Drill a hole into the bottom of the rear hub all the way through until you reach about the middle of the hinge pin
2. Tap hole with 4-40
3. Insert 4-40 grub screw that will go down into the hinge pin.
Shaved U-Brace Mod
Thus Mod is used in conjunction with the C hub and will lower the inside ball stud by about 2mm. To remove the material or "shave" the brace you will need a dremel or an equivalent too for grinding/sanding/milling. Below is a picture describing where to remove the material. The red circled areas need to me shaved to the same level as the u-brace top (yellow arrow). The best way to shave the brace as explained by "Razathorn":
Originally Posted by
Razathorn
Measure with digital calipers the area right next to where you're going to shave to see what the total height should be when you're done. This is very important. Then shave things down around 75% with a sanding drump, then use a cut-off wheel back side to shave the last 25% level and flat in small increments, measuring often and correcting.
Wayne
How to's:
Build a ball diff
How to build shocks