I never ran a full VZR2 but with the above setup the fuel consumption was really close to the V-Spec. I never really timed it but I refilled at 7min same as when I ran the full on V-Spec. Like I said it changed the power output to more weighted on the top end. With this setup I never had issues clearing jumps or getting out of corners fast. I just had to give it a bit more pull on the left trigger. I pefer this setup over the stock V-Spec because I found the V-Spec lacking on the top end. Sure I got a good charge out of the corners but the Nova guys would catch me half way down the straight. However, When I ran this setup I pulled away from all of them. Give it a try.

If I do the same thing again this year. I'd get a VZR2 crank, piston/sleeve, TKO ceramic front and rear bearing and throw it my V-Spec. Try RC Champ out of japan for OS parts. When I was in Tokyo I got the crank for 4500 yen, Piston/sleeve for 7500 yen, and the rod for 1900 yen.

I have 4 V-Specs but my new favorite engine fo now is a Maxpower M8T but if it gives me too many tuning headaches the V-Spec is an engine change away.