Gt2560rs -5

[ali-turko]

hey guys

i just bought a set of gt2560rs -5 for my gtr

just curious is it as simlply bolt the old turbos off and on with the new ones, do i need to modify anything??

also can someone please list all the gaskets i need??

and one more question my engine istock with no other mods beside, full exhaust and airpods, is alrite to run these turbos at 1 bar??

thx guys Ali

[rev210]

turn the boost right down 7 psi or so, till you get a tune/Power FC.

[N I B]

manifold gaskets,2 t2 turbo gaskets 2 turbo drain gaskets and often the 2 dump gaskets and a set of copper washers.

need to slot the oil drain bolt holes and a minor bend on the oil-water pipes. On older GTRs the rubber hoses can be stuffed also.

[ali-turko]

thx for that guys, y do i need to drop the boost?? and also wat do u mean by slot the oil drain bolt?

thx again

[R31Nismoid]

thx for that guys, y do i need to drop the boost??

becasue the car is untuned. (as rev210 said in his post)

Why would you run nearly 15psi on an untuned motor?

Plain sillyness.

[N I B]

You will see when you try bolt the drains back on,bolt spacing is a bit out but no big deal to fix.

[rev210]

thx for that guys, y do i need to drop the boost?? and also wat do u mean by slot the oil drain bolt?

thx again

Those turbos flow more alot more air at 15psi than stock ones. More air but, only the factory fuel and ignition maps that are suited for the smaller turbos. The factory ecu does run fairly rich usually so you have a little head room for power but, those turbos have a fair whack more power potential than you have margin for error. The main issue may not be right up top either but, rather the peak torque point which on those more efficient turbos will possibly be higher than factory at the same point the factory turbos make peak torque.

Bottom line is you don't want to go guessing that 15psi will be good clean fun. Get the boost right down as low as you can and then throw it on a dyno and see what you can take it to boost wise without getting yourself a Power FC or S-AFC ,at least something. You might be able to run 15psi but, without taking it there under dyno or O2 wideband observation you may find a new bill sitting in your engine bay.

[frankxinyu]

why buy aftermarket turbos before you even do the computer?

[ali-turko]

i bought them coz i found them cheap

rev210 thx for the info mate will get a power fc before i install them, would it be alrite to install them then drive to the tuner, trying not to boost them?

[N I B]

Ive done a few with stock ECUs and they have been fine at 1 bar but always check on a Dyno,For the full gains these turbos give get an ECU when you can afford one.Talk to EFI hardware about an ECU in Vic.0398735400

[ali-turko]

Thx NIB, i just wanna get the stock ones off b4 they blow