Alfa 2.0 V6 turbo

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Just saw new item in shop http://shop.vems.hu/catalog/wheelspeed-cable-p-143.html?osCsid=6a66083bd8833fc6be2fe5c71d1748d6

"ps2 wheelspeed cable"

So if i flash it with non ps2 fw it can be used for boost apparently.

[Sprocket]

You have  been able to use the SPECFET for a long time, sure  - but you have to solder a wire to a free pin on the Econoseal connectors to use it, and that's not a standard feature unless you know what you're doing.

I have both DPAK populated, and I use those to drive my shift lights, although I found that for some reason the WOT output in 1.1.47 does not function. I am not sure if I missed any other config, but when set for 7500rpm and throttle is at 100%, it does nothing. Change to a Misc output configured on the same channel and it works. WOT does not function correctly. Not tried any later firmwares yet.

Mattias, are you saying that support for the SPECFET channels has been dropped, as this will surely cause me concern

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http://www.vems.hu/wiki/index.php?page=MembersPage%2FGergelyLezsak%2FAssemblyThreePointFive

Found nice assambly thread...

[mattias]

Mattias, are you saying that support for the SPECFET channels has been dropped, as this will surely cause me concern

I wouldn't know unless I asked the firmware team about it. Since the second SPECFET is not documented to be wired to Econoseal pin in a factory built box I've never used it.

Btw.. your box does NOT look in any way to be built in Budapest unless you specifically asked for it.

[Sprocket]

Nope, my box is a self build and I have access to all inputs and outputs including the speed sensor on the main connectors. The loom uses the normal black connector and a Rover red loom connector which is a different gender. This way I cannot plug the power connector into the delicate 'input' connector

It solved the problem of getting the inputs and outputs in and out with out the mess and It wouldnt take much to re configure the board layout at the design stage to allow the two connectors to sit propperly side by side. As it is I have 12 pins to one side of the normal 18 and 6 to the other. The onboard wiring for Knock, MCP3208, P259, speed sensor and serial port all go directly to the cut down pins inside the box with some spare.

All I want now is the second WBO2 for monitoring only

Sorry for the thread hijack

[lost]

Sprocket could you help me on wiering speed sensor?
After inserting zenner and resistor for protection, whats next, is onley one wire needed for wheelspeed? If so witch one?
I suppose thet that wire can go on free pin on ec18?
Is this then something dieffrent than new ps2-wheelspeed cable from vemshop?

Or should i just buy that cable and plug it ps2 port on vems if it's someting dieffrent?

"Inside the main element is a BC817 with 18k base pullup to 5V (and input to base 1k protection resistor). The swithcing threshold is about 275mV (so VR signal minimum amplitude is 300mV to safely trigger - so all VR sensors we have seen output high enough voltage). Pulling input signal to ground also triggers it. "

[MWfire]

put 10nF condensator between gnd and avr pin for speed sensor.
Remove lot of noise.

[lost]

Just got back from the store., got
 4.7kohm resistor
 1n0 K 400v BC cap is that ok?
and 5,1 zener

now how to connect that to get wheelspeed?

Unfortunatly yesterday i hot-glued that white plastic plug to ps/2 pins...

Im affraid not to rip traces of pcb it i pull white ps2 socket.. so il'l just solder on the bottom side.

I could easily add that zenner and 4.7 pullup, but not really sure where to go with 10nf cap in that case.

& is anything else need to do to get same thing that ps/2 whellspeed cable does npn?

2_Sprocket? witch wire is used for wheelspeed input i suppose ps2-clk so i can wire that pin form ps2 connector to free ec18 pin8?

Sorry for all that questions but it's snowing for days and i'm just getting bored.

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Here are picuture of my v.3.5 genboard, with some common mods.
Note that i have two knocks and it's wired directly to ec 18 

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By topgearv6 at 2010-02-11

By topgearv6 at 2010-02-11

Well didn't wanted to solder it directly on the pcb in case i'l need something else for wheelspeed.
Until someone gives me some advice...

And it's really easy to remove

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any info?

[Sprocket]

I am using speed sensor hardware for a 12v hall sensor. The speed sensor hardware is different for a VR sensor

http://195.159.109.134/vemsuk/forum/index.php/topic,1024.0.html

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Hy, my car has "speedo sender" on tranny. it has two pins.


Managed to get some info on alfabb forum:  "that the output of the speedometer sensor is a square wave of approx. 8V amplitude (I think it was), about 50% duty cycle, with the frequency picking up to several hundred hertz at 'high' speeds.

But it might be better to tap abs wheel sensor also two wire. It's 1988 bosch abs system similiar to bmw e30 or vauxhall...

[Sprocket]

two wire are normaly VR and three wire are Hall effect.

VR is not square wave, Hall effect is

Just thought, the Transmission sensor could be optical? Im not sure how they differ in the way they work from Hall effect.

[lost]

it's mechanical sensor i belive it spins inside, just found out that it uses gearbox as ground so it might be hall...

I'd rather tap one wheel for speed. as it would be more compatibile with other cars, that two wire abs sensor would be VR?

So i need some tips about that zener and pullup and how to connect it to abs wheel sensor...

Thx.