
                        DRAGSTRIP PLUS REVISION HISTORY

                         (Major release versions only)



    Version 2.5, 2.51, 2.6 (09/92 - 12/92):

    1. Serious print error corrected --if user set shift point and
       then attempted to print vehicle combination, program would hang.

    2. Reliability of the program's Copy Protection scheme was greatly
       improved on marginal computer systems.

    3. Default exhaust valve size for aluminum and steel racing heads is
       now 1.60 instead of 1.63; all program Help files were improved under
       new file names

    4. Ford and Chrysler transmissions added to program; camshaft "lobe
       centers" now renamed as camshaft "lobe separation".

    5. Revolutionary Concept's Fax number added; Martel Brothers Racing
       Products credited as exclusive program distributor.


    Version 2.80, 2.81 (01/93):

    1. Major improvements and advancements in the program's E.T. logic were
       made, resulting in improved shift points, optimum carburetor
       recommendations, optimum gear & stall suggestions, and better E.T.
       accuracy.  Most changes affect only the faster engine combinations,
       although engine combinations that are somewhat unbalanced may
       experience particularly dramatic improvements.  Slower street cars
       (in the 14 second and slower range) are not likely to be affected in
       any way. As a result of the new logic overhead, program execution time
       increased by aprox. 60%.

    2. Numerous corrections and improvements were made to both the E.T.
       logic and Advice screen suggestions for Injected engine combinations.

    3. If the combination is turbocharged or supercharged, low compressions
       are now accepted (instead of causing a fatal combination error). In
       addition, Advice Screen Compression ratio suggestions are now tied in
       to the actual amount of supercharger or turbocharger Boost, greatly
       improving the validity of the advice.

    4. Threshold carburetor size has been decreased to prevent rejection of
       marginal engine combinations due to "insufficient" carburetion.

    5. Rocker Arm Ratio suggestions in the Advice Screen were improved to
       prevent display of conflicting messages.

    6. Display priority of the Advice Screen's 40 suggestions and warnings
       was reorganized so the most important messages are always displayed,
       while the least important messages (at that time) are off the screen.

    7. "F3=ADVICE" prompt no longer flashes or appears in bold if Advice
       screen selection is invalid due to combination error elsewhere.

    8. Vehicle database listing printouts now automatically execute a printer
       form feed upon completion; "Install" file reverts to being a batch
       file instead of a .com file; installation improvements made.


    Version 3.00 (05/03/93):

    1. New camshaft analysis formulas were added, improving DragStrip Plus'
       E.T., MPH, and shift point accuracy, and Advice Screen suggestions.
       A new statistic, the "Overall Camshaft Profile" rating in the Advice
       Screen, greatly simplifies the task of determining the best cam for
       any given engine combination.

    2. The program now calculates optimum primary header lengths, top speed
       in each gear at engine shift point, and optimum fuel injector sizes (if
       fuel injected); supports for dual turbochargers added.

    3. All alcohol fuel logic algorithms in the program were completely
       replaced in order to correct severe errors that affected the faster
       alcohol combinations; in addition, for the first time, DragStrip Plus
       will now calculate the performance of blown Alcohol dragsters.

    4. A powerful new feature has been added to the program: users can now
       directly customize DragStrip Plus' E.T. performance calculations and
       the Advice Screen's part ratings and combination improvement
       suggestions by editing new program file RACE0XX.RTS (documented in full
       in DragStrip Plus' new improved User's Manual, and also in revised
       program file RACEPRM.DOC).  Furthermore, identifiers for each database
       element have been incorporated directly into the program's parameter
       file, eliminating further need for file RACEPRM.KEY (no longer included).

    5. For the first time, DragStrip Plus will now correctly predict the E.T.s
       of vehicles that finish the quarter mile in either a transmission
       overdrive gear or a transmission downshift gear (transmission gears
       other than the typical "high" or 1 : 1 final gear across the finish
       line);  "Optimum Gear" calculations will be adjusted to match if the
       transmission has one or more overdrive gears.

    6. Motorcycles can now be calculated by the program (no accuracy
       guaranteed!) as a result (among other things) from allowable input
       ranges of several variables having been increased: Tire Height widened
       to 20-44", Trans Slip increased to 25% maximum, top Gear ratio increased
       to 8.40, Driver' Weight minimum now 80 lbs., Vehicle's Weight widened to
       350-6000; Rocker Arm Ratio will now accept 3-digit inputs, such
       "1.52 : 1".

    7. E.T. performances of Stock and Super Stock cars can now be accurately
       computed by DragStrip Plus thanks to new program input "Engine Quality";
       additionally, program accuracy in forecasting the performance of either
       exceptionally built or poorly built engine combinations has been
       dramatically improved as well.

    8. Database maximum capacity has been increased to 115 vehicles, while
       the first four "Example cars" in the vehicle database have been locked
       to ensure these combinations will always match the User's Manual
       tutorial (existing user's databases will not be affected, only new
       vehicle databases).  Also, a 6 second Pro-Modified combination was
       added to the vehicle database (new users only).

    9. The program's print routine has been replaced to correct a serious
       problem affecting certain printers models that caused them not to
       print; additionally, printer connection lockups are impossible now.

   10. For E.T. increased accuracy, temperature default was removed while
       transmission slippage was made a required input once again; numerous
       new defaults were added throughout the program and the Setup utility;
       an aggravating series of menu cycling errors was fixed.

   11. Program now tests computer system for sufficient RAM memory during
       program load and guides user through needed system changes, if any
       (reason: 512K RAM memory computer systems may experience difficulties
       with this version's increased memory requirements); all internal
       program Help was upgraded to match DragStrip Plus's newly overhauled
       User's Manual.


    Version 3.1 (05/26/93):

    1. Alcohol, turbocharger and supercharger E.T. logic was reworked again
       to further improve E.T. & MPH accuracy and to correct a series of
       minor errors.

    2. Transmission upshift and downshift logic errors have been corrected.

    3. The program's print routine was replaced again to correct serious
       problems affecting certain printers models.

    4. Quick Compute and Dyno mode errors that resulted in program crashes and
       other problems have been fixed.

    5. A new feature, swap function <F6>, was added to the vehicle database.


    Version 3.2 (07/22/94):

    1. Minor corrections to certain combinations' 60 foot & 1/8 mile E.T.s
       and MPHs.

    2. Optimum Injector size error corrected.

    3. Tire growth emphasis added throughout program and help files.

    4. Program installation utility improved.

    5. Revolutionary Concept's modem support BBS added to program and
       text files.


    Version 3.3 (08/12/94):

    1. Adds internal support for BBS modem operations.

    2. Emphasizes that "Detailed Analysis" mode is DragStrip Plus' best,
       for new user's benefit.

    3. The program's hardware requirments were stiffened.

    
    Version 3.4 (05/18/95):

    1. Changed technical support postal address and added email address.
    2. Removed modem BBS number.

    
    Version 4.02 (10/27/95):

    1. Removed program copy protection.
    2. Shareware/Registered sub-versions created.
    3. Technical support was switched from phone to e-mail.


    Version 4.05 (01/23/96):

    1. Improved the automated installation routine, revised documentation.
    


    REVOLUTIONARY CONCEPTS, INC.
    P.O. Box 690048
    Houston, Texas 77269-0048
       
    E-mail: dragplus@rconcepts.com
    WWW: http://rconcepts.com
    
