1. No! Race gas doesn't make you faster, it just helps keep shit from blowing up
2. Because the kids and the cops have taken all the fun out of it
3. Depends upon aerodynamics
4. If it is an RB20 not a lot over 500, RB26 about 600.
If it's an R32 motor it is a RB20DET or RB25DET. The R33/R34s had a RB26DET and DETT. The RB20/25 motors never came twin turbo and it would be much more expensive, and stupid, to make it twin turbo versus single turbo. I would have to believe, if it is twin, it's a RB26.
Was the engine rebuilt, or just new turbos. Nothing but the RB26 motors will handle much over 500 without upgrading internals.
Bullshit ricer crap. Timing my ass! This guy sounds like a douche.