R32 Ecu Change

[Gts4RB30]

Hey peoples just wondering out of curiosity, i have an r32 gts4 and i'm going to a forged rb30, i want to retain the afm but if i changed the ecu to a gtr one could i run two??? or is it even possible to change to a gtr one??? i already have the gtr injectors and resistor pack and the gtr doesn't run vct i know i would have to get a nistune daughter board to lower the max rpm as the 30 suffers from shit revs but could it be done????

[StevenCJR31]

what do you hope to gain from doing this? are you planning to run two turbos?

[paulr33]

yeah kinda all over the place here

but you can run the GTR ecu and run one or two afms (its upto you)

if single AFM mode you parrallel up the signal wire into AFM-1 and AFM-2 inputs on the GTR ecu

[Rolls]

nistune daughter board to lower the max rpm as the 30 suffers from shit revs but could it be done????

wut?

You can't just use a stock ecu and expect a 30 to run lol, so you'd need a nistune no matter what.

Why do you want to run 2 AFMs? Just use the rb20 ecu with a nistune, will do everything you need it to.

[N1GTR]

the 30 suffers from shit revs

Wrong. Do some research.

[Gts4RB30]

ok the 30 suffers from shit revs above 7.5k should have been more specific, secondly YEAH i know i have to run a nistune i said i would, the thing is i know a single z32 afm runs out of resolution around 280 to 300 rwkw i want a bit more than that and i know dominic russo had tuff gtr running 1000hp with 2 z32afms yes i can see the maths but i still want to know can it be done??? yes sorry bout the question being all over the joint have been sleep deprived. am running a t04e master power turbo with but i want to run a custom 2into 1 air intake.or am i just wasting my time???

[Rolls]

So just put the afm in a bigger pipe, or get a ford lightening maf, or go map etc.

plenty of much simpler solutions, putting it in a 4" pipe makes the most sense

[Gts4RB30]

^^^Don't understand? ??

[KiwiRS4T]

The suggestion is that you take the guts out of a Z32afm and install them in a 4in intake pipe .

I would think you would be better off with a Link or Vipec - no afm needed (two would be $700) - Link can handle boost control plus other features.

[bubba]

wut?

You can't just use a stock ecu and expect a 30 to run lol, so you'd need a nistune no matter what.

With a small turbo, yes, you can.. I ran my 25/30 with 25 turbo on an untuned RB20 ECU for several months with no issues (other than running a bit rich )

Also a z32 afm is good for well over 300rwkw, many documented cases of them handling up to around 370rwkw..

[Gts4RB30]

thanks bubba thats about the power i want cause this thing is still a family car??? f**k pulling it apart and i already have one the car came with it. what ecu did you end up running with the z32 afm Bubba??? personally looking at nistune with factory ecu. hate apexi power fc over rated!!!!

[Gts4RB30]

and how bout the standard ballancer??? what can it handle

[bubba]

Nistuned RB20 ECU

Standard balancer is fine but I would keep the revs to around 6500rpm unless you're building the bottom end properly (balancing, clearances and balancer to suit 7000rpm+).

Just a FYI, the RB30 runs a 3-rib p/s belt whereas the skylines run a 4-rib belt. With the RB20 p/s pump+bracket, I just ran a 3-rib belt no worries.

Now that I have the RB26 ATI balancer on there, I had to change to an RB26 pump+bracket.

[Rolls]

The suggestion is that you take the guts out of a Z32afm and install them in a 4in intake pipe .

I would think you would be better off with a Link or Vipec - no afm needed (two would be $700) - Link can handle boost control plus other features.

What he said, ECU change is definitely another option as well. Vipec is a good choice as well.

With a small turbo, yes, you can.. I ran my 25/30 with 25 turbo on an untuned RB20 ECU for several months with no issues (other than running a bit rich )

Also a z32 afm is good for well over 300rwkw, many documented cases of them handling up to around 370rwkw..

Well you can, but I don't know why anyone would, I mean rb30 with stock turbo and injectors etc? pass lol

[bubba]

What he said, ECU change is definitely another option as well. Vipec is a good choice as well.

Well you can, but I don't know why anyone would, I mean rb30 with stock turbo and injectors etc? pass lol

My original 30 conversion was done in a weekend and bolted the RB25 turbo straight back on, drove it home in the wee hours of the Monday morning

I didn't say it's ideal, just that it can be done if the situation requires

[Gts4RB30]

yeah i've notice about the pullies and have ordered a ross balancer to suit already was just wondering out of curiosity. also running gts4 powersteering pump alternator and ac as i believe these are same as gtr anyways. does the engine really need to be balance for power around 300rwkw and below??? it's not like it's going to be thrashed every minute, "maybe" everyday but not ALL the time

[bubba]

Balancing is more about revs and longevity, not necessary but certainly beneficial. If you're going to rev the thing really hard, then balancing is a must!

As said above, whoever tells you RB30's can't rev high or they grenade is a douche. Correct balancing and tolerances and you can spin the thing to whatever you want.

[Rolls]

As said above, whoever tells you RB30's can't rev high or they grenade is a douche. Correct balancing and tolerances and you can spin the thing to whatever you want.

Well within reason, the rb30 will be putting more force on the bearings/rods at x rpm than an rb25/26 but the limiting factor for revs is not usually rod bolts/bearings and more a function of the head/turbo combo actually needing revs that high.

But yeah, for pretty much any combo the extra stroke isn't going to be a limiting factor for revs.

edit: Definitely balance the motor! this isn't just some slapper, and it isn't like it is going to cost you more to get everything balanced correctly.

Edited January 9, 2012 by Rolls

[GTSBoy]

yeah i've notice about the pullies and have ordered a ross balancer to suit already was just wondering out of curiosity. also running gts4 powersteering pump alternator and ac as i believe these are same as gtr anyways.

Um....given that the GTS4 engine is an RB20 that hardly differs from the one in the GTSt (apart from having a different sump with the diff in it), why would you expect the engine accessories to be the same as GTR rather than GTSt? It makes sense for front suspension and other chassis parts to be the same between GTR and GTS4, but not engine parts.

[bubba]

Well within reason, the rb30 will be putting more force on the bearings/rods at x rpm than an rb25/26 but the limiting factor for revs is not usually rod bolts/bearings and more a function of the head/turbo combo actually needing revs that high.

But yeah, for pretty much any combo the extra stroke isn't going to be a limiting factor for revs.

edit: Definitely balance the motor! this isn't just some slapper, and it isn't like it is going to cost you more to get everything balanced correctly.

I also wouldn't be rev'ing it stupidly high on stock rods either, even with nice fasteners!

The great thing about the 30 is you don't NEED to rev it THAT high to make decent power.

My current setup is stock rods, stock E pistons, fresh bearings, longnosed crank, N1 oil pump with Reimax gears.. once it's transplanted into the new car I'm going to lean on it and see what the stock pistons/rods are actually good for

Um....given that the GTS4 engine is an RB20 that hardly differs from the one in the GTSt (apart from having a different sump with the diff in it), why would you expect the engine accessories to be the same as GTR rather than GTSt? It makes sense for front suspension and other chassis parts to be the same between GTR and GTS4, but not engine parts.

I would guess the power steering pump is an RB20 item but even with the RB26 stuff I've come across a couple of different types of brackets and pumps which really threw a spanner in my works