You can fit the Rb26dett in the 240sx chassis. It just takes alot of R&D. It's not a matter of just bolting it in. You would need a Rb25det tranny to mat with, since the Rb26dett is all-wheel drive. Then you would need custom motor mounts and a custom drive shaft. Of course you would also need a seperate engine managment system like Haltech. The Rb26dett will also fit in the 300zx chassis too, but it's not as popular as the same swap into the 240sx. Power wise the Rb26dett swap is really not that great. You wouldn't be able to control anything more than 700hp. And if you're looking for just that much HP, then you could make that same amount with the SR20det. Jun could bearly control their Hyper Lemon Silvia, and it was producing 700hp. I guess you could say that the Rb26dett swap would be a very expensive bragging right.
Duc Tran
www.boostfactor.com