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  Hot Rod Jim's Chassis Shop


  Check out my rides at hubgarage.com

        Hot Rod Jim has sold the design of the TriFive Frames to Nerd Rods. Please check out their site for more information about their chassis offerings. www.NerdRods.com. The Nerd Rods version even comes in a Weld it Yourself Kit.

        Hot Rod Jim’s Grand Sport is built on the same solid frame as our Basic chassis. The advantage to the Grand Sport package is a wider suspension, and the larger brakes of a late model 1988-96 C4 Corvette. A  wider suspension is more stable because of a better suspension geometry.The Grand Sport suspension is 62 inches wide witch is two inches wider than a stock TriFive. The wider stance  requires deep backspaced wheels to clear the fenders.

Click to Enlarge

        The brake system for the Grand Sport is a pair of 13 inch front rotors with twin piston calipers, and a pair of 12 inch rear rotors with single piston calipers. We upgrade all of the late model calipers to the 96”Grand Sport Calipers with Corvette logos cast into the calipers as part of the Grand Sport package.

        QA1’s Ultra Ride coil over shocks and precision springs  make the Grand Sport package a chassis that is comfortable with responsive handling. The coil over shocks are perfect for the owner looking to build a nice driver with a none varying weight load. One or two people most of the time will result in the best ride quality , but if you expect any type of major load change you may want to look into an air-ride system.

The Stage 4 Rolling Chassis With Coil Over Shocks

Frame

Front Suspension

Rear Suspension

  • Hot Rod Jims C4 Frame
  • Black powder coating
  • 11 gauge gusseted boxed tubing  
  • Transmission cross member
  • Motor and transmission mounts
  • 1988-1996 Corvette front suspension
  • Aluminum dual-A-arms refinished in silver
  • New polyurethane  bushings
  • Power rack & pinion rebuilt by AC Delco
  • New tie rod ends
  • Black powder coated suspension cradle
  • QA1 Ultra Ride Coil Over Shocks
  • Front Brakes
    • 13” Front disks and twin piston calipers
    • Corvette raised logo on calipers
  • 1988-1996 Corvette rear suspension
  • All aluminum suspension components– Refinished in silver
  • New half shaft U-Joint
  • HRJ adjustment system – powder coated black
  • New polyurethane bushings
  • Dana 36 differential with 3.08 Gears (good for automatic transmissions)
  • QA1 Ultra Ride Coil Over Shocks
  • 12” Rear disks and single piston calipers
    • C4 Corvette E-Brake
All of this for $16,120

Options & Upgrades

Brake Lines

        Braided stainless steel flex lines and steel hard lines installed on your chassis.

+$650.00                

Dana 44 Upgrade

        This will upgrade your rear suspension to the heavy Dana 44 differential.  The Dana 44’s change in price with market demand. Please call for current pricing.

Call For Price               

Sport Kit

        The sport adds components to improve the handling characteristics of the car. Without drastically increasing the price

  • Front 24mm sway bar
    • Powder coated
  • Urethane bushings
  • Rear 19mm sway bars
    • Powder coated
  • Urethane bushings
  • Chromalloy Teflon coated end links
  • Adjustable 4 bars
+$1,100.00               

SS Kit

        Our Super Sport kit is designed to take out the last links of deflection and give you unparallel feedback and ultimate in handling response for your shoe box. The Sport kit is installed first. Then the QA1 ultra ride shock are removed and replaced with QA1’s Dual adjustable shocks with bearing ends instead of the polyurethane bushing on the ultra ride shocks. The spring rates are increased all around for faster weight transfers making the car respond faster. The front sway bar is further upgraded to aid in faster weight transfer. The SS kit shows its best potential when crossed with minor body modifications. Please see the Upgrades page here for more information.

  • Front 30mm sway bar
    • Powder coated
  • Urethane bushings
  • Rear 19mm sway bars
    • Powder coated
  • Urethane bushings
  • Chromalloy Teflon coated end links
  • Adjustable 4 bars
  • QA1 Dual adjustable shocks
    • Bearing mounts
  • Eibach Springs
+$1,980.00               

Grand Sport Rolling Chassis W/Coil Over Shocks FAQ


Wheel and Tire Information

        Hot Rod Jim recommends a 245mm wide front tire (9.6 inches) and 275mm wide rear tire (10.8 inches) will fit the lease effort and are a common size tire. To allow for more tire clearance you can roll the outer fenders and quarters for bigger tires. The Stage 4 Grand Sport brakes requires a minum wheel size of 17 inches tall to clear the brake calipers.

Differential Power Rating

        The C4 corvettes came with two different differentials, the Dana 36 and the Dana 44. The Dana 36 came behind the automatic Corvettes from 1984 until 1996 and the manual Corvettes in 1984. The Dana 44 came in the manual corvettes from 1985- 1996. The Dana 44 has a bigger case with beefier gears and better yokes, and a heaver bat wing. We are running a Dana 36 with our Black Widow project with 3.73 gears, LS1 and a T56 6 speed. We are actively trying to break it with weekly road racing and the use of the car as a daily driver.

Transmission Notes

        The 4L80 automatic transmission and T56 manual transmission will require minor floorboard modification to keep them up between the frame rails.

QA1 Adjustable Shocks

        The QA1 Ultra Ride shocks are built for comfort and ride quality. The Shocks come with an adjustable coil allowing you to pretension the spring for your desired spring load. These shocks also have a 12 point adjustable rebound settings on a small knob located on the shock body.  These 2 adjustments will allow you to tune the ride to your car without extensive work.

 

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