I'm aware of the gentleman's agreement.
So you're saying a tune will make the R34 quicker?
No crap. It's a turbocharged I6. Though, it actually would only make about 350hp or so, which would still put it behind the LS2 C6 on this page.
But just so you know, the base LS3 C6's have gone mid 11's and made over 400whp with just a tune and I don't think tune only R34's have done that. I also wouldn't say the R34 would be quicker around a track if tuned considering the stock C6 is much faster everywhere and stops quicker and corners harder.
The Z-tune is a COMPLETELY different beast from an R34 GTR. Every last detail is completely different and the engine has a lot more than just a tune...
Like I said, the R34 is a great car stock. But there's no getting around that BONE STOCK it is underpowered and a bit behind its time. Bone stock, they run flat 13's to high 12's. A stock Mustang GT is as quick or quicker. Just sayin'.