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Microtech Ltx12 Ecu

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Shaun Mentor

Shaun

Posted
Posted
Shane

We are mainly talking about a RB26 with quad TB.

I have driven a car for 3 years with a Microtech and even had one running in my skyline for a couple of months.

They dont drive anywhere near as good as a standard computer on the street on cruise or anywhere near as good as a tuned Power FC.

Depends what you want from your car to what ecu you use. If i had my way I would have a Autronic.

^^^^^ What he said ^^^^^

Shane, admit it. Microtechs are crap on multiple throttle set ups. Even Jon warned me about it but nooooo, i didnt listen.

Shaun Mentor

Shaun

Posted
Posted
i understand a rb26 has 6 throttle bodies, but that want part of the original post which you were having a shot at me about champ. :(

rx engineering are doing a gtr as we speak, so once i know the results from that we will soon now if its a tuning issue or a ecu issues with the 6 throttle bodies.

Shane,

sorry man, i dont mean any disrespect and i know Jon is a good bloke and excelent rotary tuner, but he tuned my Microtech LTX12 controlled R33 GTR engine with multiple throttles, and it turned out shit. It was worse than shit. It was shitty shit shit! It idled between 600 and 2000 rpm, drove terribly, and made (get this) 209kw at the rears at about 12 pound boost! That would be funny if he didnt charge me so much!

It was a terrible experience.

sh@un Grand Master

sh@un

Posted
Posted
Shane,

sorry man, i dont mean any disrespect and i know Jon is a good bloke and excelent rotary tuner, but he tuned my Microtech LTX12 controlled R33 GTR engine with multiple throttles, and it turned out shit. It was worse than shit. It was shitty shit shit! It idled between 600 and 2000 rpm, drove terribly, and made (get this) 209kw at the rears at about 12 pound boost! That would be funny if he didnt charge me so much!

It was a terrible experience.

My GT-R (an R32, mind) was tuned by MRC in Castle Hill, and runs an LTX12 plug'n'play. It has made 262rwkW at 17psi and has good mixtures, runs fine any time of the year, idles rock steady at 950rpm (after disconnecting the idle control valve) and can return well over 550km per tank of BP Ultimate, if you focus on trying for economy.

Seems funny to me how people seem to be bringing up the AFM Vs MAP&TPS thing (like the R32 specific LTX12 sequential fire uses), when this is EXACTLY the thing that makes a D-Jetro set-up better than a normal AFM'd PowerFC (I've seen reports of MUCH better economy with D-Jetro)

Anyway, carry on....

Shaun Mentor

Shaun

Posted
Posted
P.s Shaun- I want your log-in name :

What the fcuk does that mean? I dont get it?

Anyway, its good that youre stoked with your microtech. I had one on my Rb20 for about 3 years and it was good too. But my experience with them on an Rb26 was less than perfect; and thats an understatement. Im sure it was a combination of many things (ie, the tuner etc) but its left a bad taste in my mouth. Having dealt with an Autronic SM4 recently, however, has proven to me how good things can be.

But im sure if you spend enough time on any set up it can be good.

I still dont get the log-in name thing. Is your name shaun too?? Maybe i missed something. :D

CruiseLiner Mentor

CruiseLiner

Posted
Posted

my autronics smc runs perfectly with idle and cold starts, etc with map sensors so i doubt that is the issue with microtech being "lower quality" than the others.

im ripping out my autronics to try a pfc djetro, and a real tuner, unlike my previous tuners on the autronics who have been less than desirable.

as said any ecu is only as good as the tuner, and autronics tuners in wa are either good and arseholes or just plain useless, hence my decision to swap ecus, and ive been told im stupid for "down grading" from some, but plenty have been saying how good the djetro units are also, so time will tell if its the right decision.

anyone after an autronics smc (with auto tune), boost kit, 500r cdi unit and a set of msd coilpacks and all wiring to suit a gtr gimme a PM and ill let ya's know about it. wont be ready for sale for about 2-3 weeks or so though.

cheers

N I B Grand Master

N I B

Posted
Posted
my autronics smc runs perfectly with idle and cold starts, etc with map sensors so i doubt that is the issue with microtech being "lower quality" than the others.

im ripping out my autronics to try a pfc djetro, and a real tuner, unlike my previous tuners on the autronics who have been less than desirable.

as said any ecu is only as good as the tuner, and autronics tuners in wa are either good and arseholes or just plain useless, hence my decision to swap ecus, and ive been told im stupid for "down grading" from some, but plenty have been saying how good the djetro units are also, so time will tell if its the right decision.

anyone after an autronics smc (with auto tune), boost kit, 500r cdi unit and a set of msd coilpacks and all wiring to suit a gtr gimme a PM and ill let ya's know about it. wont be ready for sale for about 2-3 weeks or so though.

cheers

You wont regret this ECU swap Brad.

1JZ.747 Community Regular

1JZ.747

Posted
Posted
Shane,

sorry man, i dont mean any disrespect and i know Jon is a good bloke and excelent rotary tuner, but he tuned my Microtech LTX12 controlled R33 GTR engine with multiple throttles, and it turned out shit. It was worse than shit. It was shitty shit shit! It idled between 600 and 2000 rpm, drove terribly, and made (get this) 209kw at the rears at about 12 pound boost! That would be funny if he didnt charge me so much!

It was a terrible experience.

now we are mates, and im not having a shot at you, but i feel its a bit harsh to comment on your experiences when you know that the bolts on the adjustable cam gears were not tightened and the car was dropped of to them in this way and they tuned it not knowing that. i am sure the cam changing around all the time would have had a fair bit to do with the power and the idle etc.

and, its about time i dropped by.

Shane.

Shaun Mentor

Shaun

Posted
Posted
now we are mates, and im not having a shot at you, but i feel its a bit harsh to comment on your experiences when you know that the bolts on the adjustable cam gears were not tightened and the car was dropped of to them in this way and they tuned it not knowing that. i am sure the cam changing around all the time would have had a fair bit to do with the power and the idle etc.

and, its about time i dropped by.

Shane.

Shane,

My oversight in properly tightening the bolts on the cam gears would have had no effect on the tune what so ever. Its not like the cam gears were turning independantly to the cams. Indeed; if this were the case, the engine would not run. If you had worked on an RB26 you would know this. And anyway, Jon (apparently) dialled in the cams, so if they were loose, i assume he would have rectified the problem, thus improving the tune. This, sadly did not happen and the car was a dog. In fact, i didnt even know they were loose while at RX Engineering; Jon didnt tell me this. Anyway, all thats history now and a lesson learnt; such is life.

We are mates, and i dont want to make it sound like im attacking you or Jon (that saga was mainly my fault im sure), but The whole Microtech thing just does not work well on 6 throttle GTR's.

And yes, we should catch up. My car should be ready soon. Its been almost 2 years!

Are you married yet? Emma and i bought a house too!

Shaun.

discopotato03 Grand Master

discopotato03

Posted
Posted

My next aftermarket ECU will be a PFC because I want the advantages of MAF load sensing .

I have used earlier Haltech's and an Autronic SMC and have to admit that the software makes a HUGE difference to the end result .

I cannot see how any MAP sensed ECU has a hope of controlling any multi throttled engine accurately because once manifold pressure rises to atmospheric (throttles wide open) the MAP sensor reading is constant so all you have is an rpm and air/water temp sensor signals to tune from . If the TPS signal shows fully open its a constant too . Once you get some positive manifold pressure different story .

I can't understand the resistance to PFC's , plug - tune , maybe with larger injectors and MAF metre . It sounds too easy and maybe thats the problem .

Cheers A .

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