Rodney's twincam thread

[rodney007]

Love your car man, it's kind of my inspiration :)

cheers, love your rims BTW... might get a set for mine

[ProZac]

Just a thought... Where abouts in NZ are you? I'm driving this thing up to Taupo later this week. Would love to have a gander at your car if you're on the way?

[rodney007]

Auckland :( :( and to be honest its one of thoes "looks good from 3 meters standing back" type cars...

[ProZac]

Hah, so is mine, trust me :).

[thrash]

i'm not sure if the map sensor will work with the chipped evo ecu - but if the maf works fine for you, and it proivides enough power for your enjoyment, why bother changing it?

[rodney007]

i'm not sure if the map sensor will work with the chipped evo ecu - but if the maf works fine for you, and it proivides enough power for your enjoyment, why bother changing it?

agree

[enthuzed]

Good thing I sometimes go through old posts....Rodney, I didn't realise you set this up with in a digital dash/VELNAS car.

I've got a GSR-III and I'm keen to know all the little tricks that enable the VELNAS, tacho and whatever else to continue to work with an aftermarket computer.

If you could put together a tech post on it, there'd be a few who'd want to know that stuff...

Thanks man. :)

[rodney007]

sorry to say this but the velnas doesnt work only the lap function. The digi dash is simply spliced into the coils but seems to only half-read the engine rpm, the speedo and other things work fine though.,

[ProZac]

Can probably make you a little box so your tach reads the wasted spark signal properly... just a couple of diodes really.

[ProZac]

The bits in the dashed box are what you need to slap together. This is the high drive tacho circuit copied out of a well known aftermarket ignition module. Ive used it before on an rb20 powered r30 skyline running wasted spark.

Just a couple of 1n4007 diodes, some 36v 3W zener diodes, and a 10k resistor. The value of the resistor can be played with to ensure the pulses sent to the tacho have enough energy to drive it, but im fairly certain you'd find 10k would be fine :).

If your not really into electronics at all I can slap one together on some strip board for you and send it up :)

[Junkers]

Nerd porn.

Do ignition modules rely on the CAS signal and some sort of feed off the TPS so it can retard the ignition where need be?

[ProZac]

In a round about sort of way... The ignition module is driven by the ECU on an EVO, which takes the signals from the CAS, TPS, and all the other sensors and figures out what the current timing should be from various maps and other parameters.

Unlike our starions, in which the ignition module is driven directly by signals from the distributor, (the half-moon 'ignition module' inside our distributors is actually just a pass-through place holder, it does nothing), and signals from the knock sensor and map sensor used for retarding the timing if knock or overboost conditions are detected.

[rodney007]

cool!... but looks bit hard for me :-)

[rodney007]

Got my Turbonetics t3/t4 few months back from Japan , Nice wheel setup for spool / powerband. Cars half caged now too, will post pics of that shortly. Fixed all engine leaks. Tidying up here and there...

:-)


IMG_0391 by rodney007x, on Flickr


IMG_0398 by rodney007x, on Flickr

[T-man]

Good job there!