9/25/2017 0 Comments How To Install A Sway Bar Link KitTriumph Spitfire Performance Enhancements. Technical Information. Triumph. Spitfire Performance Enhancements (August. Why. bother improving Spitfire performance? Triumph. Spitfires are basically fun, economical street- legal go- carts. Many are. still around (more than 3. The. later model Spitfire is not a bad- handling car in. It. bested its contemporaries in. However. some simple changes and upgrades, especially to the early Spitfires. Power. acceleration and speed are where. Spitfire was mediocre in its day, and by today's standards it's. But. a few simple, relatively inexpensive and easy changes can yield. This article is aimed at improving Spitfire performance for sporty. It’s not a race car. There are several good race preparation guides for Spitfires written by. Spitfires. These include the. Triumph Race Prep Manuals, Kas Kastner's race prep guidelines and Jon. How to Change a Sway Bar Link. This article will explain how to replace a sway bar link - a suspension component in a vehicle that will often make a loud noise when. Eliminate understeer and transform your Porsche Cayman GT4 into what it should have been from the factory: a perfectly-balanced mid-engined sports car that is just at. Wolfe's "A Guide To Racing Your Triumph Spitfire or GT6." Furthermore. I’ve limited the scope of enhancements herein to things that. Spitfire a Spitfire—or at least a Triumph for the most. This. article is meant to benefit Spitfire enthusiasts who want to reliably. Spitfires often, improve their performance and derive more. I attempt. throughout to explain "why"—the. Exact details of “how” to. This article is. divided into two main sections—Handling and. IF-4248FP Bolt-On Pinto-Mustang II IFS Kit for 1942-1948 Ford.Power—and in each section. However. like any engineered assembly, the Spitfire is a system. Changes involve. trade- offs and often these changes need. I hope you. this information helpful. CONTENTS. (shortcuts to sections of this article): HANDLINGSuspension. Basics. Weight. Alignment. Wheels and Tires. Wheel Studs. Front Suspension. Rear Suspension. Anti- Roll. Bars. Dampers. Bushings. Brakes. POWERTorque. Power. Gearing. Weight. Ignition. Exhaust. Intake. Cylinder Head. Compression. Camshaft. Machining Tolerances. Bottom End"Spit- 6"Fuel Injection. Forced Induction. Other. Handling. Understand. Some Suspension Basics. The. main purpose of the suspension is to ensure proper positioning of the. The entire. suspension- -tires, wheels, linkage, springs and dampers (shock. The mass of the vehicle and. At any given point in time with any given set of forces, weight is. If more force is. If the front of the vehicle slides first, it's called. The objective of performance suspension tuning is to manage weight. This is done. primarily by managing mass, the height of the center of mass (a. Generally, the following are good. These may sound. simple but their implementations sometimes work against each other and. What. ultimately matters here are the forces where the rubber literally meets. Wheel rates, which are the product. Simply adding wheel rate. Spring rates alone mean nothing as a. I've. tabulated various factory and aftermarket front coil, front anti- roll. ARB) and rear leaf spring. Spitfires and GT6s. Lose. Weight, i. e., "Add Lightness"All. Trimming weight is easy to do on the later U. S. market Spitfires by. This light weighting will not only make the car less. Moreover, many people think this conversion to the. European spec look or pre- 1. U. S spec look improves the car's. Best of all, it's free. There are other ways to. Weight reduction boosts performance, and every little bit counts. Understand. and Set Alignment. Before. discussing the following changes to the front and rear suspension, it. There are six. spatial degrees. Caster, Camber and Toe, and. Changes to the. will result in changes in alignment that need to be measured. On the Spitfire, caster, camber and toe can be adjusted at the front. The Spitfire front suspension is a. A- arm design. Caster and camber can be adjusted. A- arms and the frame rails. Addition of. shims adds negative camber. Adding or subtracting unequal numbers of. A- arm interfaces changes caster (more shims at the aft. Adjusting the tie rods sets toe. Note that because of the tie rod geometry, Spitfires exhibit a. Therefore, when changing camber. At the rear of the Spitfire is a swing axle architecture with a single. The swing axles themselves are the. Rear caster is for all practical purposes not adjustable, camber. After achieving final ride height and hence rear camber, toe. Stock alignment specs vary across models and can be found in. Specific non- stock settings are mentioned during the. Overview information on. Wheel Alignment. Install. Better Tires and Wheels. Better. tires and wheels are typically the single biggest contribution to. Wider. and lower profile tires on wider rims promote a better contact patch and. Original equipment on most Spitfires are. The simplest upgrade is to use 1. One low- cost. option for 1. TR7 wheels, which come in 7/8. You. steel TR7 wheels to the Spitfire (almost, but not quite a. The best performance rim option is a. Performance Superlite, Panasport. Revolution. The. Moreover, offset combined with the steering axis, rim width, camber and. Spitfire, the steering. Spitfires have positive scrub radius). Minimizing scrub radius will distribute loads better. Tall and wide tires on. However, rather wide tires on wide rims can work, even on a. Spitfire, if the. Secondary factors include rim width, tire. There. and tire fitment procedures you can follow to check and see. Spitfire, it typically occurs. Too much width. and/or not enough offset is usually the root of the problem. Other rub. at the rear radius arms and rear fenders. Generally, using tires wider. Of course, if you do body work to flare the fenders, you. Note that ever- larger wheels and lower profile tires are not. Bigger diameter rims and tires are typically. Moreover, their mass is. Lower aspect ratio tires are less compliant, so they may not. Given the large amount of. Spitfires exhibit, a moderate profile tire with. Besides, very low aspect tires leave. Lastly, be sure that the wheels won't interfere with the front. Virtually all 1. 3 inch wheel options will work with. Spitfire Girling 1. Girling 1. 4. calipers (mk. IV and 1. 50. 0), but TR7 wheels interfere with the larger. Girling 1. 6 calipers for the GT6 due to their offset (see brake upgrades. Install. Thicker, Longer Wheel Studs. Something. to seriously consider, especially when using alloy rims, is. Being as thin as. Fitting wider wheels with wider, stickier tires allows the. Furthermore, alloy rims have thicker center sections. Upgrading. to 7/1. Spitfire/GT6. ones is good insurance, and a really good idea if you are considering. Spitfire sportingly. One very good solution is. Land Rover Freelander studs (part. CLP9. 03. 7L). These are 1. M1. 2x. 1. 5) and. The. comparison photo below clearly. For more details, see Upgrading. Triumph Spitfire Wheel Studs. Achieve. Better Suspension Geometry—Lower and Stiffen. Changing. wheel alignment and lowering and stiffening the Spitfire can improve. Lowering brings the c. Similarly, some suspension geometry changes and. Stiffening helps by limiting the. Moreover, stiffer springs reduce the amount of travel for. Some. lowering and stiffening is good, but too much makes things worse. Too. much lowering generates poor suspension geometry that lowers the roll. Moreover, too much lowering leaves inadequate. Too much stiffness actually reduces grip. Too much change in stiffness at. The right amount of lowering and stiffening. Optimize the Front. A good compromise static front suspension geometry for a stiffened. Spitfire at rest on level ground is when the lower A- arms are parallel. This is a reasonable compromise that lowers both the. This geometry occurs when the total distance between the center of the. A- arm and the upper spring seat. Because the distance from the lower A- arm to damper. Ways. to lower the front include 1) shortening the. Dampers with adjustable. Stiffer. springs reduce the amount of travel for a given load, thereby. The least expensive way to. On. the Spitfire 1. Another option is to cut. However. this is not easy to do correctly. The. Another approach for the. Spitfire 1. 50. 0 is to install. Spitfire mk. 3 or mk. IV. These. springs are shorter in free length but also softer than stock 1. Softening while lowering is. Therefore, using softer. Spitfire on a 1. 50. Running. out of suspension. Replacement. springs need to be stiff. Spitfires and GT6's. Solutions from this calculator and good choices. Spitfires are. 3. IV. and 3. 00 pound per inch, 9 inch free length springs for. Spitfires. these with the popular aftermarket "lowering" springs for Spitfires. A. good choice for GT6's with their added mass and additional front weight. Such 2. 5 inch inside diameter coils springs are available from. Below. are profile photos of my. Spitfire 1. 50. 0 with 3.
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