Cams is always an interesting debate, long argued, no real end result.
There are basically two ways of thinking.
- Larger cams, combined with a LOT of head work, oversized valves and all that $$$ jazz - works very well great power overall. You do seem to take a hit in lower RPM however.
- Smaller cams, combined with a minor tidy up - works well but gives better off/on throttle response & low RPM performance as a result.
Obviously the is about as gross of a generalisation as one can make without typing a thesis.
The bigger/flow will obviously be more efficient as RPM and perhaps make more power. Yet the smaller option will perhaps not make quite the same peak yet give you more gains on/off the loud pedal.
Depends what you are after really. Most Racepace GTR's here in Melb 2.6-2.8ltr run factory cams from what it appears. Bigger than that the advice is the 3ltr does like a little bit of larger cam love given the displacement alterations.
Syd seems a different view where everything is oversized (valves, cams, porting).
Issue is - all the results are on a dyno for both states. Now as my RB26 comparo from Racepace showed... The turbos virtually have identical boost/power graphs (-9 & -5). Yet on the street/circuit it is markedly different. It would be up to the owner to decide what they are after I guess.
Pity you weren't about over Xmas. I do intend to come up again in a month or two so I can show you the Mexican build lol.