Quote:
Originally Posted by blingbling
Absolutely, 1j head + 2j booty = retune. The 2jz has a longer stroke, bigger bore, and when mated with the 1jz head he is definitely going to have to re-tune it. Especially with this case since it has probably had head work done and an aftermarket turbo that will need to be dialed in to match the new powerband ( Never read your 1jz swap thread so I'm just assuming here  ) |
Yes, I'll be having this re-tuned.
2J makes up the extra displacement through a longer stroke. The bore size is exactly the same, hence why the 1J head and 2J bottom end can mate properly.
The tune right now is for 93 Octane, GT35R, 680cc Injectors, HKS 264 cams, blah blah. The only difference between this 1.5JZ and the 1JZ tune is the bottom end. It will run and drive just fine with the current tune. I will not push my luck though.