Street Fighter
If you have been following the progression on our Project Street Fighter '66 Mustang, you know we're building this pony to be a corner carver that's competitive with late-model sports cars. We're giving it an old-school Trans-Am style with modern performance goodies under its skin. This Mustang isn't meant to be a smooth fairgrounds cruiser, but a built-tough race car that's legal for the street.
Last month, we installed Total Control Products four-bar coilover rear suspension using a Chassisworks FAB9 rearend. The installation went surprisingly well, and it involved converting the original leaf-spring 8-inch Ford rearend to a tubular control arm, coilover 9-inch. There was some welding involved, but it was ridiculously easy. The front suspension went in just as smoothly. We've all heard the phrase "bolt-in" or "direct-fit," but we've grown weary from past experience of putting too much faith in those words. So far, the suspension assemblies from TCP, a Chassisworks company, adhere to their promise of easy installation.
This Mustang has only been touched for regular maintenance since the day it left the factory; no upgrades had been made until we got hold of it. We're starting with a virgin front suspension that hasn't seen a loose bolt in 40 years. The most difficult part of this suspension project was removing the factory pieces. Once the stock stamped control arms, 6-cylinder springs, puny sway bar, and rusty hardware was removed, we quickly gained momentum, and installed the new goodies.
We're using TCP's coilover conversion kit that features their tubular upper and lower control arms, adjustable strut rods, and VariShock double-adjustable coilovers. There are two different upper control arms you can get for this kit: the standard pivot shaft version, or the dropped shaft to improve suspension geometry without the hassle of drilling new mounting holes through the shock tower. If you are using a standard shaft, TCP has a fixture to locate the new arm's mounting holes to give the same effect. The matching lower arms are made to directly replace the factory stamped ones. Adjustable strut rods replace the fixed, bushing-style unit, and can replace the factory rod for use with the factory control arm, or TCP's. The pivot housing at the body-side of the strut rod is a unique item. Its internal workings allow the rod to move without exposed bushings.
We chucked the stock coil springs and shocks for the VariShock coilovers. The factory stuff set the tire-to-fender gap at about three inches, slightly too nose-up for this car. The coilovers give us the flexibility to adjust ride height without changing the spring's behavior. The coilover can't be adjusted out of the shock's range, however. The TCP kit is designed to lower the car two inches in the front, and can be adjusted one inch in either direction from there. The shock body is also adjustable for compression and rebound for optimum tuning. We chucked the small stock sway bar for TCP's 1 1/8-inch bar, which has billet aluminum center mounts and endlinks with polyurethane bushings. We already have the TCP spindles that use the large '70 Mustang bearings, and TCP's power rack and pinion system, so with the new parts, the front suspension will be completely taken care of.
The only thing missing in this suspension overhaul is a really great alignment. We'll handle that final detail after our new 427-ci Windsor stroker motor from Smeding is installed (plus some other components). Part of that process will also be to adjust the corner weight for balance to get the full potential from these parts.
Final Adjustments
Setup is very important. We love the way the Mustang looks now with a very small tire-to-fender gap, but the tires rub at full lock, so we have to adjust it. The great thing about coilovers is you can change the ride height without replacing or cutting up parts. The coilover shouldn't be adjusted more than about one inch to set ride height; if you need more height change, TCP sells extensions separately. Aside from making sure nothing rubs, right height adjustments can be made to adjust the static weight at each corner for the best handling. A little bit of anti-seize on the shock body threads helps the adjusting process.
Getting an alignment is crucial to getting the most from your suspension package. TCP has suggested alignment specifications that can get you headed in the right direction. Street and track driving require different alignment settings, so finding a middle ground can help save tires and make the car drivable on the street, while optimizing performance at the track.
WHERE THE MONEY WENT Coilover and tubular arm kit $2,745 Sway bar kit $289 Total $3,034 THE COST SO FAR The Car $3,800 Battery replace and relocation (11/08) $299.00 Radiator and fans (12/08) $1,398.12 Spindles, front brakes, wheels, and tires (1/09) $3,067.04 Trunk rehab and tool box (2/09) $40.48 Rack and pinion steering, column, and wheel (4/09) $3,012.00 9-inch rear and brakes (5/09) $4,631.02 Rear suspension (6/09) $2,918.00 Front suspension (current) $3,034 Total $22,199.66
