BTW, I think I read that those upgrades will add so many points to the classification that my 944 won't be competitive in TT.
Note that there is usually a big difference between Car X that is built for a spec class and the same Car X that is built specifically for TT. It is true that many modifications that are allowed in the spec class will cost points and won't really make a performance difference in TT (like small front chin spoilers), and many of the worthwhile TT modifications are "too much" or illegal for the spec class (like Hoosier A6 tires).
Shocks and springs are common modifications to nearly all TT cars, so it's safe to change those and take the points for them. Save your stock sway bars, though, as many TT cars are still competitive with the stock ones in place (and they spend those +2 points on something else that will make a bigger difference).
When in doubt, resist the urge to make too many modifications at the HPDE level (or, don't make modifications that can't be easily or cheaply reversed). Save the money for HPDE seat time and consumables for the time being.
Correct. Most 944 spec cars will point out in Mid Range of D or the very top of E. What really hurts is weight reduction where we get nailed with 15 points or so. Spring, shocks and sway bars are not too bad and pretty common on most cars anyway. The other area that hurts us going with 924S 5th grear costs 3 pts and the LSD for 1 point. Stuff like this is not big gain for the cars, but are pretty common on the best 944 spec cars.
It might be possible to request a reclass based on hp / weight once stripped as even fully built we pass the F limits power/weight. Best place for 944 spec built to limit of class rules is PTE/TTE. Even so we probably can't complete for a win if a well build and well driving E car shows up.
For now don't worry about being competitive in TT. Just run and learn. By the time you can run to the limits of the car you will be ready to race in 944 spec anyway.
Az 944 Spec Dir, 06 Az Champ, 4th 09 Nationals