The RB26DETT Z1 and Z2 (and often referred to as an "RB28DETT Z1/Z2") was the engine used in the Nissan Skyline GT-R Z-Tune built by Nismo. It uses a stronger RB26 block based on Nissan's Le Mans GT2 and GT500 racing vehicles (stamped with RRR), stroked crankshaft, upgraded turbochargers, and a higher bore and stroke at a displacement of 2.8 L.

Apr 24, 2018 · Firstly, The RB25 NEO has the same factory quoted power output as the RB26(206KW). The Neo also uses a completely redesigned cylinder head, RB26 rods and new pistons and has Solid lifters like the 26. The RB26 was produced from 1989 till it ceased production in 2002, you’re half right there.

Oct 4, 2005 · The thing i've heard about the NEO 6's and the difference between regular rb25det is, well on the RB25DET head, its got VTC which retards or advances the intake came, so variablly timed cam. Neo 6's use variable valve and lift, in thier heads, which makes up for more of the power plus i've heard the compressions are different.

Dec 19, 2011 · But to re-iterate that thread, given the Neo has RB26 rods and N1 oil pump, solid lifters, plus longer inlet manifold runners (for better midrange torque) and VTC, it makes it better in many ways than the RB26 and the missing 100cc hardly matters.

Mar 21, 2008 · RB26 (and to a lesser extent the RB20) were built as a homologation special engine for GrpA Touring Cars. GrpA rules meant standard inlet and exhaust manifolds, standard turbo size (externally standard), standard intercooler size, standard crank and rods, same basic head and block, but all else is free.

Jan 5, 2009 · The NEO is hands down a better engine than the earlier version of the RB25. All of the differences Joe just pointed out there are also much stronger RB26 rods in there as well. yes they are somewhat difficult to gather info on but that is getting alot easier too with people such as myself modding them up.

Nov 17, 2015 · Option 1 for installing VCT would be to grab the kit from Otomoto, which is 3K, plus the required NEO bits, which is around another 650 by all accounts, give or take. Given this is a rebuild most of the other work required would have been done anyway so …

Nov 13, 2022 · Nissan gave the RB25DET NEO forged connecting rods from the RB26DETT and the oil pump from the N1 spec RB26. While it wasn’t a gigantic revision, it did make for more improved flow and better performance. Power actually increased on the NEO engines, despite the increased emissions technology.

Jun 16, 2006 · There isn't any real difference between the RB25DE, RB25DET, RB25DET Neo and the RB26DETT bare cylinder heads, the castings are almost identical. The advantage of the RB26DETT cylinder head is in the hardware (valves, springs cams, followers, inlet, exhaust etc) attached to the cylinder head, not the head itself.

Oct 14, 2005 · I REALLY would love the Rb26 but for the same amout of money i could put a rb25 neo in with some upgrades and be at the same HP level what do you all suggest? Top