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Old 23rd December 2016, 10:43 PM   #1 (permalink)
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R34 gtt tuning

All,

I initially wanted to go all crazy with 500 bhp but soon realised it is too much work to do at this stage due to personal circumstances


But i don't want to wait for a while to get time and also lots of expenses for this
So for short and maybe mid term i want to tune it so have much better performance than stock

So far i have

Boost controller

K&n air filter
Splitfire coil
Okish intercooler . It is rated at 500bhp but looks like one of those chinese ones which is sold by a uk firm . It came installed
Coilover
Braided lines ..
Uprated brake (350mm) with brembo

What I want to do is

Walbro 255 - £80

Link ecu - £1400
Maybe injectors depending on current injector capacity £400
Existing turbo or direct bolt on ??
I have seen posts people saying you can change the ceramic shaft and others saying some firm make a modified t3 housing

I don't ideally want to change manifold and clutch

With above setup how much hp is realistic ?

I am thinking with around 2-3 k i should be able to get 400 bhp at flywheel
Is that too ambitious?
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Old 25th December 2016, 06:56 PM   #2 (permalink)
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Hi,

For GTT I would just get a Nistune and get it mapped with your current setup (+ the walbro). If it's a manual you should easily see 350 bhp. Then upgrade your turbo to get to 400 bhp.
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Old 25th December 2016, 06:59 PM   #3 (permalink)
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Best thing to do would be to speaker to a tuner. I used Steve Saddler (FC Tuning) when I had my auto GTT and got to 310bhp with 400 lbs of torque at 2.5k rpm on the following setup:

- Jap speed FMIC
- Walbro
- Nistune ecu
- Gizmo boost controller
- Blitz induction kit
- Two stage boost removed
- Stock injectors
- Stock turbo

If had kept it, I would have changed the injectors and upgraded the turbo and possibly a manual conversion.
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Old 25th December 2016, 07:08 PM   #4 (permalink)
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The issue is not many tuners will share information as I will be doing the work myself

I have bought the walbro 255 and planning to buy link 4 plug and play

Then I am upgrading injectors and also clutch

What I was trying to do was to take a shortcut and not replace exhaust manifold so using direct bolt on turbo but then realised it is only a manifold i am missing so might as well get it and get a twin scroll turbo and not waste money on bolt on turbo


When you buy 6boost, would you get top or low mount?

Where can u get the custom downpipe made from?
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Old 25th December 2016, 07:13 PM   #5 (permalink)
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Not sure mate, I had a trust greddy downpipe and stock manifold. Plus when I did look into upgrading the turbo I wasn't going to change the mainfold I just wanted to change the turbo. My advice would be to give a Steve a call, he's a good guy and happy will be happy to speak to you and hes only really a tuner. He does have a garage in Ware that will fit your parts for you but he won't pressure you into fitting parts etc.
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Old 25th December 2016, 08:35 PM   #6 (permalink)
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Thanks bud appreciate your input

If i need steel plates for intercooler mounting, where do i get it? Is still plate the right word to use? Need those steel straight metals that you can put a nut and bolt on each side
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Old 25th December 2016, 09:51 PM   #7 (permalink)
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Notnsure what you mean. You should have had a fitting kit with the FMIC. Post some pics I'm sure someone will know what your looking for.
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Old 25th December 2016, 09:55 PM   #8 (permalink)
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Just had a thought, your FMIC you should try and get one where the pipes both go towards the offside front wing. It saves having to make a hole in the near side wing for the pipework.
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Old 25th December 2016, 09:55 PM   #9 (permalink)
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It came with no fitting

I need something like this mending plate but just need the steel so i can cut and drill

Mending Plates Zinc-Plated 100 x 16 x 10 Pack | Plate Brackets | Screwfix.com



I have to buy and fit piping myself

I know i can get the silicon pipe online however what is the shiny aluminume pipe between silicon pipes?
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Old 25th December 2016, 09:58 PM   #10 (permalink)
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You'll need to fabricate it. Where are you based? You could speak to Andy Miller from Miller Development, he's fitted loads of fmics on 34s (including mine ) and can give you some advice.
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Old 25th December 2016, 09:59 PM   #11 (permalink)
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London based, i have never done it.

When you need this or exhuast pipe sort it donyou simply walk in to a metal fabricator and ask them to fabricate what you need?
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Old 25th December 2016, 10:00 PM   #12 (permalink)
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Quote:
Originally Posted by stranger12 View Post
London based
Andy's in Epsom. Google Miller Development on kiln lane
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Old 26th December 2016, 10:10 PM   #13 (permalink)
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many thanks

has anyone done decat here on r34?
does both ends looks the same to you ? it is not a straight lined flange on each side but seems to fit which ever side you put it on which is very confusing.
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Old 11th January 2017, 07:54 PM   #14 (permalink)
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Ok - firstly, the questions you're asking would be enough for me to agree with the above and get it done through a workshop.

If you're insisting on doing things yourself as a learning experience I can't fault you but be prepared to break something. If you're doing it yourself to save money then don't, incorrectly installed parts can and usually do cause more issues which ends up costing you more in the long run.

Whichever way you go, you need to keep your goal of 500hp in mind and build towards that, otherwise you'll spend money on something, only to replace it later (costing more in the long run again)

From my own personal experience with my GT-t, i moved from the stock ECU to a power FC BUT ended up with a Link G4 when the PFC couldn't do what i wanted.

Last thing i will say is that you MUST get a decent tune done after doing things as simple as an exhaust/intake change. R34 ECU's are notorious for going into "limp/protection mode" when excess airflow is detected causing flat spots and peaking in their rev range.

Tell the truth - if you want to do the mechanical things yourself, perhaps contact a tuner and explain that you're wanting to get the car ready before it heads into them to tune. I imagine that people would look at that as a way to work with you, rather than giving out their knowledge and experience for free (which is exactly what you pay for when you get a shop to do the work...)

Hope this helps out!
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Old 11th January 2017, 11:46 PM   #15 (permalink)
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wise words from above, i have changed my mind so many times, at getting my car to the stage its at now, it would have been cheaper to have a goal and stick to it, but its one of them things when you start tuning, you get used to the power and always want more.


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