HKS_TRD;2045582 said:
Fair enough, but there are other MA70s out there on the streets that have more in common with the race car than a TurboA
That actually depends
The core idea behind Group A was to maintain a very large number of Stock/OEM parts on the Race cars. It was based on the following Key regulations:
- OEM AFM or MAP meter (the reason that TurboA converted to MAP)
- OEM Throttle Body to DownPipe ,this includes Intake Manifold ,exhaust Manifold and ... TurboCharger (the reason that TurboA has CT26a as described
here)
- OEM Head ,Block and Crank (We all know about the reinforced blocks that toyota developed)
- OEM InterCooler which is a rule change of 88 and the reason to see larger IC on TurboA
- OEM Front and Rear SubFrames reason why we see the two reinforcemant bars on TurboA and most 89+ Supras
Now the rest was free ,including Engine internals ,brakes ,suspension and transmission. Keep in mind that Group A was the KING of Motorsports back in the days thus the Toyota program was quite expensive to run ,for example the 12 transmissions was custom build by Hewland in England (not hollenger in Aus) with a cost of 35 000 British pounds each ,which in today's money is well over $100 000.
When it is possible to fit a non Turbo A car with magnesium Hewland transmision as I know a guy who has one for sale ,fabricate the suspension parts as I know another guy who has the BluePrints from SpecFAB ... in reality it is much more likely to see what people believe to be GroupA Cams fitted in well build engines. There is a trick here ,and it comes from the fact cams were free and Toyota changed them multiple times. Not only that but in Japan they ran very different qualify and race engines and according to some reports yet another cams for Enduro races ,so yes there were multiple cam profiles. In Australia the race program was much more limited ,John's car was setup with primarily Goal to finish races and not to be competitive as he had virtually no chance against the Australian build cars in his class so he he might've had one cam profile.