NASA TT4/ST4 tubular subframe legal in 2023...
Haven't seen this mentioned anywhere yet, but this looks like it opens up TT4 for K swapped cars not using the stock subframe...
Originally Posted by NASA 2023 rules
6.4.4 ST4 Non-OEM Front Sub-frame Swaps
Front non-OEM and tubular sub-frame swaps that mount to OEM mounting locations, for the purpose of facilitating a motor swap, will be evaluated by the National Director on a case-by-case basis requiring proof of OEM suspension geometry and with a -0.4 Modification Factor assessment. |
Originally Posted by Roda
(Post 1634627)
Haven't seen this mentioned anywhere yet, but this looks like it opens up TT4 for K swapped cars not using the stock subframe...
Has anyone had their K swapped Miata 'evaluated' by NASA yet? Would the 5-10 WHP hit from going Z3 instead of A2 be worth keeping those .4 pts? |
Originally Posted by Ben AZ
(Post 1637176)
Would the 5-10 WHP hit from going Z3 instead of A2 be worth keeping those .4 pts?
|
There are now ways for a K24Z3 to make K24A2 power. It's obviously not free $$ to do that, but the option is there to hit the same power goals and retain the 0.4.
I suspect the k24a2 + V8R/KP subframe to pass this rule though. Same pick-up points and all. I don't personally know of anyone that did this "inspection" yet. |
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