Still no one running LT-12's yet

[Edge]

Microtech do make one that hooks correctly to auto transmission computer.

The LTX-12 computer calculates more calculations per second or at least very similar - so should be just as smooth if not smoother.

A MAP sensor is not less accurate!

The full power of tuning software for every parameter and even the maps themselves is available to end user and mechanics in English and not just a Japanese apexi authorised workshop only version.

It stores 4 tuned programs which you can switch between using either hand controller or laptop, or the dash display (shows dials).

The idle problem is not a problem on the microtech in any way if it is tuned right down to 500rpm which is absolutely possible. The thing is it does require tuning all through the rev range and not just for above half throttle and full throttle. Need low throttle tuned as well.

The overall time required to do this tuning is dependant on the dyno machine used. on a dynopak dyno, 3 hours should do it plus a couple of cold starts.

Just so you know what closed loop is - all it does is set the fuel/air mix to 14:1 when no throttle (idle).

Just as easily done by including low throttle and low rpm in the tune.

If you want it cheaper - I'll check, just pm me.

[JimX]

Thanks Roy. I can't afford an ECU replacement anytime in the near future, but when I can I'd say the closed-loop version will be out and I can take a much closer look at it.

[Cubes]

  Quote

Just so you know what closed loop is - all it does is set the fuel/air mix to 14:1 when no throttle (idle).

Closed loop leans out the car when cruising on light throttle.

It definately gets you a lot more kays out of a tank.

[Edge]

Joel,

Oops does it work for low throttle too?

If you want fuel economy you will still need the low throttle tuned to 14:1 as well. Most of the time thats what you sit on while cruising.

Don't forget, just plugging in a PowerFC will actually give you bad fuel economy.

For better fuel economy you still need to tune the PowerFC too!

The thing is both the tune programming and making maps are accessible on the microtech through the laptop software.

Can anyone tell me what maps the PowerFC won't let you alter? as I'm considering getting a Power FC and testing it.

I'm getting a new front mount fitted tomorrow.

I'll let you know what fuel/air ratio I get for idle once I have the microtech fitted and tuned after this.

[Cubes]

light throttle = low throttle..

[Roy13]

  Quote

Originally posted by Edge

Joel,  

Oops does it work for low throttle too?

If you want fuel economy you will still need the low throttle tuned to 14:1 as well. Most of the time thats what you sit on while cruising.  

Don't forget, just plugging in a PowerFC will actually give you bad fuel economy.

For better fuel economy you still need to tune the PowerFC too!

The thing is both the tune programming and making maps are accessible on the microtech through the laptop software.

Can anyone tell me what maps the PowerFC won't let you alter? as I'm considering getting a Power FC and testing it.

I'm getting a new front mount fitted tomorrow.

I'll let you know what fuel/air ratio I get for idle once I have the microtech fitted and tuned after this.

I have a Import Magazine at work i thing it is number 30 and it explanes what is opened up buy the new laptop software for the GTR. I'll try and post the info tommorrow!

If your car has only the usual air pod and exaust there are a few guys that are readding this thread (including me) that would be very interested in someone haveing there car tuned and taking some pictures of the Matrix Tables and screen 29 and 30 setups then posting them on this thread!!!

[Roy13]

I think i can get the car to run very efficiently i just need something reasonable to start with so as the idle isn't driving me crazy. Having trouble with some of the screen 29 and 30 settings!

I am going to purchase a $300 dollar wide ratio oxygen sensor but cannot do this and pay for dyno tuning.

With this i will be able to lean off the mid range for people with std engines for day to day driving. Then they can swith back to a full power map for a track day. I would assume anyone dyno tuning would be aiming for sher performance throughout the rev range. Unless you pay for someone to do to maps for you BIG MONEY!

[Cubes]

$300 wide band o2 sensor... Where?

The Genuine narrow band RB O2 Sensor is $280....

[Roy13]

Are you serious i didn't even know you could get genuine Skyline stuff. Has your RB 20 got a 3wire sensor because i'm pretty certain certain the 98 200sx sensor has the same plug as an R33 ( just going off pics in mags ) i'll have to go to a car yard and check it out BUT there sensors are $170 direct from Cessnock Nissan full price!

[Roy13]

Not only that but its a Bosch widband sensor and i have a freind who will lend me the digial AFR screen!

[Roy13]

Hear is a timing curve i've been playing with, i posted the matrix table on the "Please someone post Microtech Matrix tables"

[Cubes]

I gave Nissan a buzz and they said a RB20DET O2 Sensor was $280.

Apparently even though the sensors look the same and have just as many wires to do differ. Thats what the nissan bloke told me.

Also apparently it is possible to use a EL-EF Ford 6 O2 Sensor, BUT speaking to NGK, they said exactly the same thing as Nissan told me.

[Roy13]

I love that RB 30 Guide as i'm a Motorcycle Mechanic obviously have a RB25det head, and also have a spare RB30 bottom end, a RB26dett water pump and a microtech so it looks like there will be an engine ready for my car when it lets go!

Looks like i'll have to spend $750 and get the 100% increased clamping full faced ceramic heavy duty clutch!!! Then it will go straight on the RB25/30DET. The main price will be the Forged Pistons, except we deal for wisco at work!!!

[Cubes]

Check out the thread named:

R33 RB30 Conversion... Heaps of info there..

[BUZZARD]

  Quote

Originally posted by Edge

Microtech do make one that hooks correctly to auto transmission computer.  

The LTX-12 computer calculates more calculations per second or at least very similar - so should be just as smooth if not smoother.

A MAP sensor is not less accurate!

A map sensor is certainly less accurate, as you are attempting to determine the intake air quantity via manifold pressure. With a AFM you already know the air quantity, and with an ecu that calculates air per cyinder per reference pulse you will get vastly greater fuel control as compared to a map sensor

The full power of tuning software for every parameter and even the maps themselves is available to end user and mechanics in English and not just a Japanese apexi authorised workshop only version.  

It stores 4 tuned programs which you can switch between using either hand controller or laptop, or  the dash display (shows dials).

The idle problem is not a problem on the microtech in any way if it is tuned right down to 500rpm which is absolutely possible. The thing is it does require tuning all through the rev range and not just for above half throttle and full throttle. Need low throttle tuned as well.

The overall time required to do this tuning is dependant on the dyno machine used. on a dynopak dyno, 3 hours should do it plus a couple of cold starts.

Just so you know what closed loop is - all it does is set the fuel/air mix to 14:1 when no throttle (idle).

Just as easily done by including low throttle and low rpm in the tune.

If you want it cheaper - I'll check, just pm me.

[Roy13]

bump

[[ant]]

hm good topic this one. did a search for Microtech and found this. im looking at an LTX8 for my DR30 skyline (4 cyl FJ20). can get one in and tuned for $1450 w/out handset with aftermarket separate coils (FJ has single coil stock). but the guy didnt mention removal of AFM and the additional air temp sensor so ill have to ask about that. still gonna be pretty damn cheap though for the Microtech. my other option is a Wolf V4 for ~$2200 w/out separate coils.

seems micro is pretty good apart from fuel consumption possibley, but then my stock ECU is 1984 analog ecu and it idles rough and runs very rich at idle anyway