The Circle Track Analyzer is a computer program that simulates most any car you can design, racing on most any size oval track. It will let you predict and understand the effects that various modifications have on handling, performance and lap times. IBM or compatible computer with Windows 98/Me/XP/2000/NT and Vista. (NOTE: WE DO NOT ACCEPT RETURNS ON OPENED SOFTWARE PROGRAMS)Features: Mouse driven interface compatible with Windows 98/Me/XP/2000/NT/VistaFull 32 bit version uses long, more descriptive names for saving files. Detailed front suspension layout screen, very similar to our popular Roll Center Calculator. Detailed rear suspension layout screen. Many specs can be picked from general descriptions, rather than from detailed engineering specs. However, engineering specs can still be entered. On screen help by simply clicking on any input spec. New graphing features let you graph MPH, acceleration rate, engine RPM, just like a data logger used by the pros. Options include graphing up to 6 tests, zoom, shift, modify titles or labels, different background colors, line styles, etc. a log of the last 25 runs is kept to track your modifications. You can select runs from the log to keep longer to recall or graph in the future. Loads power curves automatically from the proper versions of Engine Analyzer. Print most all menus and screens. Feature to automatically find the best gear ratio for a particular track. Program can automatically "dial in" critical specs to match your car's lap times. "Corner Jacking" Screen to estimate the change in ride height and corner weights from adjusting (jacking on) springs. You can now do an Symmetric Angled 4 Link rear suspension, like a Chevelle or Mustang. You can create tables of Roll Center Position and Camber for various combinations of dive and/or rollYou can Graph the output from the Roll Center Position or Camber table aboveProgram now calculates Tire Track change (scrub) and draws tires correctly for this changeProgram now calculates a " Handling Rating" based on the weight transfer of the front versus the rear. The car is "balanced" at the apex of the turn (not accelerating or braking) when theses weight transfers are equal. The program can automatically find the roll center heights or spring rates or front roll bar rate to produce various balances between the front and rear weight transfer. The "Corner Weight" (virtual scales) now determines the ride height and/or corner weigh changes from changing a tire size or moving/removing/adding weight (ballast). Swing Arm length calculation has been added to the Front Suspension Screen. You can link to Performance Trends Circle Track Log Book. The log book is for record keeping of all your car's settings. With the Log Book linking to the Circle Track Analyzer v3. 5, you can also keep records of calculated parameters like Roll Center (static and dynamic), Balance, Camber Gain, and more. You can now included a rear anti-sway bar, and have the program make handling suggestions about it's size. You can now specify separate front and rear aerodynamic lift coefficients. This lets you see how adjusting aero affects can affect handling. a special 'Clc' screen lets you estimate some aerodynamic adjustments, like rear spoiler angle and design adjustments. You can now optionally enter more details about the front suspension layout for Double a Arm and McPhearson strut suspensions. These details better locate the exact frame mount for the a Arms and/or struts, and will calculate anti-dive (a suspension tuning parameterOversteer/understeer rating to estimate the handling of the vehicle at any corner on the track. This calculation is more detailed than the Front Lateral Load Distribution handling calculation discussed above because it includes corner weight effects, aerodynamic downforce, and accelerating and decelerating weight transfer. You can now get suggested starting point adjustmenPit Stop USA offers Performance Trends Circle Track Analyzer Verson 3.6 for Windows CTA36C at low everyday prices. Be sure to check out all of our products from Performance Trends including Performance Trends Circle Track Analyzer.