Yes, there are always some freaks the whole winter busy to prove how low they can go.
My stock MRX4-X with a medium weight body, NiMh battery, normal engine (no drilled holes), Savox servo's, normal plasic rims reamed (saves total 15 gram), my clutch (saves now 7 gram) and my brakedisc (saves 8 gram) stil weights 2540)
- A LiPo saves 40 gram but need to add a regulator (not sure about LiFe)
- Titanium gearbox and front shaft will save me about 15 gram
- aluminium wheelshafts will save me about 30 gram
- lightweigt rimms will save met 20 gram
- A very light weight body saves up to 40 gram (I think)
Yes, I can get to the 2400 gram but to which costs?
- The wheelshafts needs to be replaced more often
- The lightweight rims can not stand a bump
- the gearbox shaft will bend more easier with a car running in from the side
- the body needs to be replaced with every race
It will take not only the investment, but also the running costs and a higher chance of a DNF
You know rules are there to make some sense and healthy limits in racing? Well with a 1550 and even the 2400 gramm you don't.