257rwkw - GTS25t with Microtech LT12

[whatsisname]

A very big THANKS to Martin Donnon (& HPI mag’) for having a play with my LT12 ECU. The same to Tim/Ivan & the boys @ RPM/Horsepowerinabox for all their assistance, & for putting me onto the LT12 to start with!

The end result of 257rwkw was made with 13psi (graph to come shortly). Driveability is excellent!

Nil traces of detonation, 11.8:1 A/FR @ the top end & careful attention to timing "should" see plenty of (sensible) hassle free motoring.

The stock head gasket has been proven by others to cope with over 300rwkw, providing the tuning is set-up correctly (MD can vouch for this one). Likewise the stock pistons & rods.

I don't think I'll be trying to prove these 2 points though.

As a reference - A TRUST exhaust equipped (possibly more mod's?) clean healthy R32 GTS-t was run on the dyno before my car & made ~120rwkw.

I was surprised to see 80km/h acceleration wheel spin with the A/C on full blast (cause it was 32'c outside)

It's not huge power by any stretch of the imagination, but I'm happy considering to level of power producing mods performed so far.

[meggala]

all I can say is faaaaark :eek: great effort Matt you really need to run again to break that 12 was this done on stock injectors? top effort I'll be interested in the fuel consumption.

enjoy

meggala

[whatsisname]

Thanks mate.

Well mate to the best of my knowledge my injectors are still stockies!? With considerably raised fuel pressure (but still sensible levels) & asking the '044 to live up to it reputation the injectors are still coping without a drama! Once I get the graph up you'll be able to see the A/FR's.

Previous data logging showed that @ my current f/p it took 16psi of boost before it hit "max duty" on the logger.

Edit - I'm still intending on going to 550's, or possibly having the stockies modified (high flowing).

[skyzerr33]

awesome result

go get that 12 and then give me the microtech for free hehe j/k

good luck and i to will be interested to see what happens fuel consumption wise.

[whatsisname]

I'm not too concerned about consumption, as it's not a DD, but for others considering the LT12 I can certainly understand. I'll have to do a decent test.

I've got this funny feeling my next trip to the strip will result in another low 13, but with ~115mph TS :burnout:

[SeriesIIGTST]

Great results Matt!

Well done man, faarrkk, that's some nice rear wheel power. Just for those of us that don't know, what sort of mods are you running so that we may get an idea of what an R33 can achieve. The choice of ECU is driving me nuts. I'm thinking of paying out for ACV-R for now just to control boost as a "baid-aid" option til i decide what comp.

Well done again:)

Dave:burnout:

[JimX]

Holy crap, how can you say that's not a lot of power? :eek1: For an engine with stock internals I'd say that anything over 200rwkw is pretty beefy.

What percentage of the power gains do you think are related to the air/fuel ratio, and how what percentage is the timing? I'm still trying to decide if I should install my S-AFC or sell it and get a full ECU replacement. (gotta save up a lot if I want to do the latter option)

[rev210]

Matt,

What are the specs on the T4 mate?

Remember to fill your boot with cement next time you go to the drags.

[nizmokid]

how much does one of these LT12 ecu cost and do they plug straight into the original loom. I have herd that it is harder to tune these ecu's not as much adjustments. Is this true or not!

[whatsisname]

Dave,

Thanks mate. Here's a quick list of my cars engine mods (most of them) -

TRUST exhaust system, dump pipe etc...

K&N pod / CAI / Custom heat shielding

T3/T4 Garrett turbo - Exact specs I'm not sure! Ring & ask Vince Rigoli, as he's the man who selected the combo'. I do know it's not a high flowed stocky, it's a complete replacement (housings etc.) The exhaust wheel has also had some work done to it.

AVO spec adjustable cam gear (exhaust) 4' retard

Custom FMIC kit

Custom inlet plumbing (delete AFM)

16" DC thermo fan

HKS EVC

Microtech LT12 ECU (RPM + the one & only Tuna tuning)

Bosch '044 fuel pump

Malpassi RR adjustable reg

Oil catch can, lots of braided lines & anodised fittings etc.

GFB "Basic" BOV (Actually flows more CFM than most of the GFB range!)

TRUST oil cap / rad cap

NGK BKR7EVX plugs

Few other minor bits'n'pieces

I've done quite a few other mods to the car but none of them relating to power production.

Jimx,

The A/FR's are responsible for a large % of the power increases, putting actual figures on it is difficult!? Plus as you alter A/FR you also effect timing. The S-AFC is certainly a step in the right direction. It all comes down to how far you want to go? Without a doubt having "full" control over fuel/timing & temp compensation is the way to go.

Rev',

I wish I knew the exact specs mate! I need to see if Vince can recall what specs he requested from PT?

:lol: - Ah yes the old cement in the boot trick!

[whatsisname]

Originally posted by nizmokid

how much does one of these LT12  ecu cost and do they plug straight into the original loom. I have herd that it is harder to tune these ecu's not as much adjustments. Is this true or not!

They retail for ~$1400+ I think? I did mine @ the same time as a bunch of other things so I'm not 100% sure?

My ECU was "almost" a full plug & play. The only extra requirement is an inlet air temp sensor (fitted into piping before the throttle body) it's not needed but without it you don't get air temp correction. The AT sensor only needs a chassis earth & can use one of the AFM wires so no extra wire needs to be run @ all. The adapter plug (stock loom to LT12) is configured to suit this set-up.

As for ease of tuning? It's quite the opposite to what you've heard actually. The LT12 is very easy to tune! User friendliness is one of it strengths.

[Jay95R33]

Holly craparoonie Matt - that's a really impressive result.

Well done.

J

[Freebaggin]

Matt,

Great power result, that is a nice turbo for sure (when it makes that power at only 13psi), as well as a nice overall set-up and obviously a good tuning job by RPM and Martin, well done!

I don't know why there is so much stuff out there baggin the Microtech.

Anyway, you just need some tyres mate to keep up with us plebs in 1st and second! Go for the RE540Ss!

[nizmokid]

so you can plug this computer straight in and pretty much drive away without tunning? The airflow meter is removed when the new ecu is fitted!

more info would be great.

is there anyother ecu out there with the same sort of plug in loom which is not a Power FC.

anyone know of any websites I can more info on LT12 from Microtech.

sorry about so many question!...........need input!

[matlowth]

As I mentioned on LS1.au - Congrats on your power figures mate...

I'd be interested to see what sort of fuel pressure you're running - I'd be wrapt if I could up my fuel pressure and not have to fork out big bikkies for some 700+ cc jobbies.

Looking forward to seeing what your car makes when you take it down to the drags!

matt

[nizmokid]

so you can plug this computer straight in and pretty much drive away without tunning? The airflow meter is removed when the new ecu is fitted!

more info would be great.

is there anyother ecu out there with the same sort of plug in loom which is not a Power FC.

anyone know of any websites I can more info on LT12 from Microtech.

sorry about so many question!...........need input!

[Guest SPOOLIN]

Well done m8,

That is an excellent result from some very skilled tuning. Did you have your *cough* de-cat *cough* pipe in for that run?

It will be very interesting when we have a club drag meet, Two red 33's side by side down the strip dorifto style:uh-huh: :burnout: :uh-huh:

Lee:shake: runs to get a Power fc and some tuning :shake:

[whatsisname]

Could somebody pls post up my dyno graph for me, thanks Give me an email address & I'll send it on over.

J,

Thanks mate.

Lach',

Yeah time to save for those 540's, & then see how it goes @ AIR? See you on the weekend mate.

Matt,

Yeah I wasn't 100% on the current fuel press' (as Martin & I didn't touch it during the tuning) but after contacting Tim he confirm it @ ~60-65psi. At one stage it was over 70psi, without needing to be that high it ran very rich.

The guys @ RPM have pushed 90+psi through standard Japanese import (or local) injectors & they can still handle it! Other local after market injectors have been know to struggle from 80psi onwards.

Key factors are - Healthy injectors, & a pump that can cope with the demand placed upon it by running higher than max standard pressure (~50-55psi). That's where pump selection plays a big part.

Lee,

Your car (once fully tuned) is in another league to mine! 282rwkw untuned, big Apexi turbo, N1 parts, GT-R internals & a 9k rev range - that's 300+rwkw material!

Exhaust flow was as unimpeded as possible.

nismokid,

The LT12 ECU uses its own internal MAP sensor rather than an AFM as per the factory. There are pros & cons with this; a pro is the removal of the AFM in the inlet tract. You can leave it in place if you'd like but it's no longer needed & can cause a restriction. With the AFM gone you can set up a nice custom inlet pipe.

You can plug the ECU in no problems but it will need some minor work to install the air temp sensor (nothing difficult or time consuming) The LT12 comes with basic maps (fuel/ign) to get the car going but will need some dyno time to get it running @ it's best.

Microtech don't have a web site (to my knowledge?) but if you go to www.horsepowerinabox.com & email the tech (Tim) he will give you all the info you need.

Wolf have a GTS25t plug-in ECU soon to hit the market I think? I'm not 100% sure?

[meggala]

yeah matt [email protected]

[whatsisname]

Thanks mate Hmmm? The work email isn't playing the game, might have to send it from home? I'll get it done either way.