Which Ecu R34 Gtt

[stranger12]

HI All,

I have spent good few hours reading around and trying to make my mind up on ecu for my r34 GTT.

Here is what I have so far and also this will be useful for anyone wanting to buy an ecu in the future and is new to this like I am

now options are

1.Nistune - This seems to do all that is needed including having a software which user can use . I think you have to pay £150 for the software though.

It has knock map and pretty much tunable to 500bhp .

I need the ecu type 4 and it costs around £250 where as the cost of the chip in Australia is only $300 so around £200

2.Power fc plus commander. I love it but most people say it is very basic and does not allow any tuning of throttle plate fueling etc and has no knock map but has a knock warning.

I like it for having the unit which displays live data and most people have had good success with it so not sure whether to buy it or not.

if engine is knocking , I guess the water temp and a/f ratio plus oil temp can give a quick indication to stop the engine blowing up , right ? or do you need something like nistune to avoid knoking and have a safe map ?

cost should be around 0.7k or seconds hand for 0.5k but I haven't had any luck finding one .

issue is , my car is not listed on apexi as supported but then then the ecu listing says it support rb25det series 1 and 2 .

series 1 is the 250 bhp r33 gtst and series 2 is the r34 gtt i think .

This is diy configurable as far as i know .

3. Link G4 plugin , seems to do all that plus a lot more such as lunch control etc which I really don't care about but people suggest it is robust and one should get it .

the cost is circa of 1.2K if you fit it yourself or 1.6-1.8 for external fit and remap.

4. Link G4 extreme , same as above with even more features most of which may never be used.

cost around 1.3kish diy

5.haltech ecu which is again similiar to g4 extreme .

lots of others such as hks and top end ones .

part of me says just get power fc as it does all that is needed but then other part says get g4.

with the amount I will be paying for G4 , I can get a power fc and set of injectors plus set of coil packs and fuel pump so all that is needed is turbo to gain around 400-450 mark hp at wheel.

what would you have done ?

would you get g4 or power fc?

between power fc and nistune which one would you pick ?

do both allow you to do diy changes such as increasing rev ? ( i know power fc does).

where can one source cheap power fc as most on ebay around around 1k mark so making their purchase point less.

[iruvyouskyrine]

What are your plans for the car in the next 3-4 years IE mod wise and what type of driving (street/circuit/drag/drift)

[stranger12]

less than 500 bhp for the next few years I would say as above that needs forge piston etc which as I see will not be spending money on

I am inclined toward nistune

one question which I hope I don't get hard time for it is , can you do diy mapping ?

here is how I have seen it is done .

the guy puts it on dyno and then looks at the ecu target value and real value and adjusts the fuel map and timing map to get as close as possible to the target value .

so if this is the case then I can punch those number in and don't pay £400 for re map and rather pay £100 for dyno or get someone to driving the car in high way in 1st gear across the range and tune the values.

is the map gear and rpm dependent or simply rpm dependent ?

[KiwiRS4T]

There is a lot more to tuning than meets the eye. If you want to become a tuner and buy all the gear and learn on your own car that's one thing but if you think you can do it yourself just to save money you are wrong!

So your choice of ecu should be guided by what local tuners are happy to use and preferably a tuner who has RB experience (maybe get on the UK GTR forum for some pointers).

[breaker1845]

My advice would be to leave tuning to an experienced professional until you gain a solid understanding of what happens, what you are doing, etc. There are dedicated forums for tuning information and it requires a large investment of time to grasp what you need to do. One simple mistake can cost you an engine while Road tuning.

Secondly you have a range of ECU options that varies depending on how much you want to spend. Obviously having someone who can deal with a specific ECU is better and would be favourable as they would tune the car. Experience with Skylines would be something mandatory in my books also. Out of the list you gave, all of those ECU's could be used in your car quite fine but each has their advantages and disadvantages.

[stranger12]

many thanks . As said don't want to spend fortune but seems g4 is the only option

when you say experience with skyline, is that a general term of knowing what they are etc or knowing engine internals to bits

[jay-rod]

Adaptronic

[GTSBoy]

Knowing what sort of fuelling and timing numbers they typically like to run, and what they like when they are modified in X, Y and Z ways. Plus knowing what they do when they're not working properly, etc etc etc.

[Kinkstaah]

If I could have my time again, I would get the R34 GTT plugin from Haltech. It is literally as simple as unplugging the old ECU and plugging in the Haltech ECU. 0 wiring and all the benefits of a Haltech.

-PS2000 user

[Kinks]

By the time you factor in a tune, Nistune doesn't save you much.

Power FC is ancient, does the job but it's an ooooold design.

I bought an Adaptronic and they are very impressive for the price. You can do a ton of corrections on them including knock retard and power cut if the mixture is leaner than target (if your fuel pump is dying this could save your motor!! PFC will just flash the check engine light while your motor rattles itself to death).

However, the Haltech is a tempting choice now as it has 6 ignition/injection drivers enough to run the engine in full sequential mode. Adaptronic Select has 4 drivers which means your injectors and coilpacks get driven in pairs (wasted spark and semi sequential injection). Works fine but not *quite* as elegant. I heard Adaptronic are working on another model so keep your eyes open in case that rumour is true.

[stranger12]

when you say 6 drivers, does that mean it can run 6 injection at the same time meaning it can run a 12 pot engine assuming 2 cylinder are firing at any one time ?

is haltech better or G4 , everyone in UK says g4 from link ecu

[KiwiRS4T]

when you say 6 drivers, does that mean it can run 6 injection at the same time meaning it can run a 12 pot engine assuming 2 cylinder are firing at any one time ?

is haltech better or G4 , everyone in UK says g4 from link ecu

Go with what the tuner likes.