Just upgrade you AFM and injectors now before getting a remap, tell the tuner what your intended mods are and they can allow for them in the tune. A remap is nothing like an aftermarket computer, and can allow for further mods without losing drivability in the meantime, then when its all finished just get the dynoing done
To try and reduce the reversion in the AFM, you could build an anti reversion cone into the intake pipe. Im going to do this on my gtr with these pipe sizes
____________
____________ / : : \_______
____/ : :
: :
Turbo 4inch 3.25in : 5inch : 4inch Air filter
: :
____ : :
____________\ : : _______
\__:________:_/ The AFM is in the 5 inch bit, so i helps that im running a 5in AFM
The : is mesh(like the standard stuff except thicker)
Its basically a small box with 6 hoses going to each of the runners, and then some others to go to the map sensor, FPR, boost gauge etc. It is designed to dampen out the intake pulses to prevent "confusing" the map sensor.
You can do it that way, but that doesnt allow for differences between the parts you are removing and the ones you are fitting eg:new rods may be slightly shorter or longer, block may need to be decked, pistons may have slightly different pin heights(very common)
Just use all the rb20 sensors, and it should fit up fine, the only problem i can see is the TPS depending on what you are going to use for an inlet manifold
Should be fine for a while, you should be able to add a bit of timing, although it will lean it out a bit due to the improved pumping efficiency. Just dont go giving it too much stick
1- what is the std CR for RB26?
2- what is the std piston to head clearance? and what is the minimum i should stick with?
3- can i go with Tomei (1.0 mm) MHG (after refacing the head) ?
4- would it cause a problem with Cam setting? (thinking of Tomei 264)
8.5:1, but can hapily bump it up to 9:1
I wouldnt go below 30thou "squish"
you will need to measure it up after a dummy assembly
No, but i would recommend adjustable cam wheels to make the most of the mods
Thanks for that, to be perfectly honest i dont know how many K's they have on them, but they are spotless, no signs of road grime/stone chips at all, definately no leaks, not even witness marks where the springs sit against the strut.
I would thoroughly flush the cooling system with a flushing agent, and fill it with water. Drive it for a week and see what happens. Did you just buy the car, or do you have some other reason for suspecting head/gasket. Has it overheated, or making big power? RB heads are pretty tough, and dont crack often.(except RB30)