phee

iTrader: (5)

I am about done with my NA mods and the only thing left is to get the type-s ECU.

While i am looking at the instructions on how to re-wire my chassis i stumbled across our frame to power torque down request connector.

When our car needs the timing retarded-for traction purposes, it sends a 5V signal.

When their is no need for timing retard it sends a constant 2.5V signal.

If you ground it, the cable throws a code.

There is also the Inhibition to frame cable. This prevents all timing retard during non-optimal coolant temperatures.

(below 32 degrees F) by sending a 5V signal. 2.5 allows retard.
pic below


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This is for the TL's with TCS. if anyone can provide the Type-s diagram please do.

phee

iTrader: (5)

If we provide a constant 2.5V signal to the inhibition sensor will this mean it will run at full advance? please correct me if im wrong.

Couldnt we also install a potentiometer for tuning purposes?

im asking this because ive read that none of the tuning piggybacks can ADVANCE timing

Mr. Maker

iTrader: (4)

great scotts marty..!

richardparker

iTrader: (7)

Could what your trying to do also be made to retard the timming for nitrous ?

fsttyms1

We can use many thing to retard, we cant advance. If what i think phe is asking actually works it would allow us to full advance the timing then use a controller to retard it some to tune it best while still being able to "advance" it with out actually advancing it?

richardparker

iTrader: (7)

^ O, I thought it might of been something that was tuneable without a controller.

twilightmarchon

This is amazing.

friesm2000

iTrader: (4)

but on a other wise stock car it is already fully advanced (it is basically for the tcs/abs to be able to tell the ecu to drop power)

then the permission signal is just to tell the tcs module that it will not drop down power

so if you do not hook the tcs/abs up to the ecu, then yes you need some type of resistor or pot, to be able to always put 2.5v on it, so that it will always try to fully advance the timing (and anyways the ecu tries to fully advance the timing on it's own, that's why it has a knock sensor, advance it till it sees the knock sensor come on)

taintedplay

i thought this was another timing belt thread lol....

fsttyms1

Problem with our cars is no tuner out there will allow us to advance timing, only retard.Our ECUs simply wont let us. If we can trick the ECU into advancing higher it will allow us to pull it back and advance it some without actually advancing it.

friesm2000

iTrader: (4)

but the ecu will self learn the advance though, just takes a little bit though (how far will it go, not quite sure, especially if you start using higher octane fuel)

quite simple in theory, but on the expensive side to implement though (not so much on the crank though, more on the cams more so)


i know :tongue, that is the reason why we need some adjustable cams and such , have to "mechanically" advance the timing (by advancing the pickups and such), then we can use the crappy piggybacks (i wish there was a standalone option that was reasonably priced ) to just retard it from there, and know that when it says it is 30 degrees advanced in reality it is really 40 degrees (or however much the pickups where advanced)

phee

iTrader: (5)

fries you have a good point. but if we can accomplish it by prevent the ECU from retarding completely, we will be able to scale with greddy. nobody knows what full advance on these cars is.

friesm2000

iTrader: (4)

easy kinda, somebody just has to run some really high octane fuel for a while (110 unleaded should do, with the $$$ though lol), and then after the ecu adapts and all, get a scan tool, and read what the computer is advancing it

but i would not worry too much about getting the timing advanced though, as i would be about getting the AFR correct, cause the computer will just advance the timing till it sees the knock sensor detect knock, then it will back off, or just stop advancing it (and being able to manually advance it is even less important once the ecu is able to fully relearn anyways)

till you start pushing into the 100's of octane for the fuel rating though, then that is another story though

phee

iTrader: (5)

i dont think the ECU will advance fully when we raise the octane. car is tuned for 91 and nobody who runs 93 makes more power from what ive seen.

friesm2000

iTrader: (4)

but the motor itself was not built to take advantage of 93 though, (aka compression wise) only 91, so you won't get more power from the higher octane fuel (i want it, so we can see what the computer will max the timing out at though; aka it's limit), and anyways all street gas has basically the same BTU output (including 85 here) as each other, so it will basically make the exact same power


then as far as octane is concerned, it is a measurement of basically how long it takes to burn/resistant to being ignited
higher octane fuel actually takes longer to actually burn then lower octane fuel (the reason needed for more advance on higher octane), so it is able to withstand the extra heat generated by the higher compression ratios, with out igniting prematurely (aka the spark plug needs to ignite it)



so i bet if those people running that 94, bump up the compression ratio (including just shaving the head for head gaskets or something), that they would see an increase of power from running that higher octane (only if the compression ratio now excedded what the 91 could support though)


also basically boost=higher compression

friesm2000

iTrader: (4)

but then again for the computer advancing the timing

higher combustion pressures from increased compressions, also cause the air fuel mixture to burn faster, so the factory ecu may still be able to advance the timing as needed on a fully built motor running 110 octane or so, since the faster burning mixture (higher compression) is offset by the slower burning fuel (octane)

fsttyms1

We need this to go further. It would solve all of our problems!

http://www.j32a.com/showthread.php?t=442

NSXNEXT

iTrader: (2)

I thought this was a water-s thread.

friesm2000

iTrader: (4)

it yes it would open wounders, without having to skew the numbers to the factory ecu, and just being able to put what you want to happen directly into it, but the last post was in december though

friesm2000

iTrader: (4)

maybe not, but it is only showing me the first page though, without easily being able to advance pages though

but on the last page, people are still woundering when it is coming out though

fsttyms1

Actually the last post was 5/11/10. Once you register you get to see all the pages

fsttyms1

friesm2000

iTrader: (4)

yeah i noticed that after i had logged on