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Capacity Of Nistune

Yasir Raja
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GTSBoy Grand Master

GTSBoy

Posted
Posted

You can't mess with the knock sensors very easily. They are really just piezo microphones. They listen and feed the waveform back to the knock board in the ECU which decides if it's hearing knock or not. If you wanted to fake a knock sense, then you'd need to send a convincing waveform that you'd have to synthesize somehow.

From my experience with the knock sensors and the knock map, the whole thing is not reliable anyway. I couldn't get my ECU to stay on the main map even though it wasn't pinging, so we just did what a lot of Nistuners do, which is to make both maps the same. That way you don't find yourself drivign around on a soft map, and the extra safety actor can go to hell. My ECU has been tuned like that for a few years now, and there has not been a single moment where it has been bad.

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Randon_I_Am Veteran

Randon_I_Am

Posted
Posted

That was me with the CarPC and switching maps and PULP98 and E-Flex and all that...

After running between the 2 different fuels for a while now, I've found it a bit of a waste of time...

As in i wanted to get around the "draining the tank and then switching fuels" But I end up just loading the PULP98 map and trimming the AFR's to suit for the couple of "Inbetween tanks" where the mix is somewhere in the middle of E70 and E0.

But having 2, 3, 4, as many maps as you'd like is easy with NIStune.

As for the capacity of power limits ect. forget about it...

Rolls Grand Master

Rolls

Posted
Posted

You can't mess with the knock sensors very easily. They are really just piezo microphones. They listen and feed the waveform back to the knock board in the ECU which decides if it's hearing knock or not. If you wanted to fake a knock sense, then you'd need to send a convincing waveform that you'd have to synthesize somehow.

Just make a headphone jack for the knock loom and plug it into some really bad metal, lol.

The Dan Grand Master

The Dan

Posted
Posted

If ever there was a bad way to achieve something - you guys have found it

Buy an ECU that gives you all the functions you want. If you really wanted to do double maps, you can do what some of the Jap companies were doing and doing a double EPROM with a switch on pin 1 for power or whatever it was. It just swapped power to the other EPROM and ran a seperate map.

Doing it with knock sensors is kinda dodgey and pretty funny at the same time.

Rolls Grand Master

Rolls

Posted
Posted

If ever there was a bad way to achieve something - you guys have found it

I don't think anyone was actually going to bother heh.

Buy an ECU that gives you all the functions you want. If you really wanted to do double maps, you can do what some of the Jap companies were doing and doing a double EPROM with a switch on pin 1 for power or whatever it was. It just swapped power to the other EPROM and ran a seperate map.

Doing it with knock sensors is kinda dodgey and pretty funny at the same time.

In the $2k range what ECU would you recommend? The V500 still?

The Dan Grand Master

The Dan

Posted
Posted

I don't think anyone was actually going to bother heh.

In the $2k range what ECU would you recommend? The V500 still?

Yeah the V500 is actually more advanced than the Motec at this point. Runs 6 multi controllers and is the only ECU other than Motec that does.

You need to read up on this ECU to fully understand what it is capable of. You can overlay each map over each other and each multi controller has 6 inputs and outputs or something like that. Each one can be made as a 32x32 table which can be layed over any other table.

So you can do boost over wheel speed over tps over fuel pressure over nitrous pressure over ignition timing if you want

Pretty much whatever you can imagine.

Only after swapping to the V500 did all our problems go away.

The Dan Grand Master

The Dan

Posted
Posted

As far as I know it's really good. I am not a tuner, just an end user. From what I have seen though, it is very 'thorough'. I don't think it's something just anybody can get a handle of. You need to know what you are doing. I have heard people complain about the current software but it's always stuff that exceeds their knowledge so they are only complaining in ignorance

STATUS Grand Master

STATUS

Posted
Posted

I don't think anyone was actually going to bother heh.

In the $2k range what ECU would you recommend? The V500 still?

V500 is junk... cannot be compared to a $1400 LINK G4 or Vipec or haltech for that matter... worlds apart in quality.

Rolls Grand Master

Rolls

Posted
Posted (edited)

V500 is junk... cannot be compared to a $1400 LINK G4 or Vipec or haltech for that matter... worlds apart in quality.

This is pretty much what my mates tell me, but I always hear conflicting reports on here, though I get the feeling the people who say it is good don't actually use it.

Heard much about the DTAFast range of ECUs?

Edited by Rolls
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Lol @ using a vibrator to set the knock sensor off.

Im not 100% sure but if the knock sensor is faulty it will run on the knock maps. I havent checked the resistance on a faulty sensor but i know a good sensor is 570kohm.

So if it was as simple as setting a 2nd wiring circuit with a higher/lower resistor so when u switch to the 2nd circuit it jumps to the knock maps.

I dont trust the knock maps. Especially at higher rpm where there is alot of valve train noise

XRATED Veteran

XRATED

Posted
Posted

If ever there was a bad way to achieve something - you guys have found it

Doing it with knock sensors is kinda dodgey and pretty funny at the same time.

I thought it was an AWSOME idea... ha ha ha. it's right up there with the clasics- trim pot on the afm, welding the clutchplate to the flywheel, skipping a tooth on the cam gear/belt on a vl rb30, stick on wrx bonnet scoops and plastic spinners rims.

J.

Rolls Grand Master

Rolls

Posted
Posted

LOL

only thing i dont like about my NIStune is it doesnt show knock readings for the r32 gtr, but apparently Matt has been trying to make it work for years now...

You can get real knock (audible on knock ears) but have it not register on the knock count, I wouldn't trust the standard nissan system.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Non of them accurately show knock reading like power fc does michael.

The ecu has an internal knock board that senses knock which then switches to the knock maps. But doesnt let the user know when it does it.

Simon-S14 Grand Master

Simon-S14

Posted
Posted

would you prefer that the ecu shows you that its knowing and flashes a light at you yet does nothing about it and by then it may be too late (power fc) or would prefer an ecu that when it senses knocking reverts to a knock copy map which saves the engine. (nistune)

Rolls Grand Master

Rolls

Posted
Posted

would you prefer that the ecu shows you that its knowing and flashes a light at you yet does nothing about it and by then it may be too late (power fc) or would prefer an ecu that when it senses knocking reverts to a knock copy map which saves the engine. (nistune)

The issue is it doesn't half the time. We put a set of knock ears on my old car and reved out 3rd gear on a hot day (30c) after idlding it around for 30 minutes to get it real hot and it started pinging its tits off, didn't go to the knock map where we had taken 5degrees out across the whole boost section.

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