Ok so I have been contemplating doing this for a while now also. I have spoken to a few engine builders and still cant decide what to do, some stay 2.6 some say stroke! If I Stay 2.6 and spend less money (more money left over for my 240z motor) or stroke it to 2.8-2.9?
This thread has some great points. I have never driven a GTR with a stroker or any built 3.0L motors. My old 26 had 332kw on 21psi with -5 turbos, power fc, nismo injectors, cam gears, smallish exhaust, N1 oil pump. The car was fun, a little laggy but once on song it felt great.
Had it on 3 different dynos (first 2 tunes, last one power run when a mates evo was being tuned) and made similar power on each dyno. Unfortunately the last time it was on the dyno the operator said it was running a little rich and changed a few settings on the power fc and a coiuple of months later I ended up with low comp on the 6TH cylinder........CRACKED RINGLAND! Dont know if it was because he messed with the tune or it could have been coming all along. Whats done is done. Everthing else looks fine on my motor.
Now I want some of the stroker gurus honest opinions to tell me what they think about this motor that was just finished being built. The engine builder does great work and Im thinking of using him for my build. He used to work for the gibson motorsport team as a mechanic, knows his GTR's and old datsuns. The latest engine is in a 260z, specs below
Built by Peter Mcdonnel
Tuned by Les Collins Racing (engine dyno)
Final tune GT AUTO
RB26DETT
CpPistons 8.5 compression ratio (was originally built for pump fuel)
Spool Rods
Mild Race Ported Head
1mm Oversize valves
Supertec springs
Custom clive cams 272 10.5 LIFT Camshafts
Modified N1 oil pump with external pickup
ATI 1000hp balancer
High octane ignition pickup kit
Spitfire coils
Garret 2860 -5 turbos
Tomei dumps
Ceramic Coated 3.5 Inch Oval Exhaust
Motec M84 ecu
Run in tune on the engine dyno it made 609hp
Final tune on GT AUTO's dyno 400kw on 22psi Pump fuel
506kw on 24psi E85
video here https://www.facebook.com/GTAUTOGARAGE/videos/10153623161916523/
Pictures Below. If you want to see more of peters work check out this page, great stuff
https://www.instagram.com/petermcdonnell65/