Why cant I install my supercharger onto my Honda S2000 or my Mercedes 190E?
Because you download some body’s tune first. You have to buy a new car.
So if you go back to default or one your own tunes you can install right?
If not, then that’s a BUG and needs SQUASHED.
:o)
It is the same bug that should of been Squashed in Forza 3, and they should of patched it then. Certainly it should of been taken care of in Forza 4 but it was not nor was it ever patched. Nor in Forza 5 and now here it is again in Forza 6.
It is a extremely annoying bug, the work around is to sell the car for half price then buy a new car for full price. On a car that cost 2 million CR you loose 1 million CR to fix it.
I have no idea what it would take to get Turn 10 to fix this, really it needs to patched and fixed ASAP.
It’s one tough bug, survived through 4 Forzas now.
The old bug from Forza 3, 4, and 5 that was never fixed or patched is back when you download a tune and install it if the build has a supercharger you will not be able to make a tune yourself and install a supercharger.
Please this time Fix it.
Wow this is embarrassing…just like the transparency about patches 
Just make sure when you buy the new car you also buy a centrifugal supercharger before you apply the tune again, or you will be in the same boat.
I can’t believe this bug is still hanging around after 4 games.
I guess it could be considered a feature at this point.