Dan's PNP RB25DET R33 Skyline ECU PCB

[Dan]

The beginning .......

[XR Pilot]

Fucking lurkers...

Sorry, I'm only allowed out of the cage for sunlight and forum posting every 6 months. I try and get out more often but they keep moving the key In all seriousness though I'll try and catch you on Skype sometime soon, a fair bit has changed recently. I'm no longer living in Newcastle for one.

Tacho output is completely configurable within the bounds of your input pattern. This may prove to be not good enough for the skybucket, in that case? Or may be OK if the regularity of pulses is irrelevant. Will be schedulable like an injector or ignition pulse later, so no panic. 5V ones are just a logic pulse and 12V require a coil kick back? Or what?

If you can give a tach pulse for every count of the inner 6 tooth wheel (or 4 in the case of SR20's) then this will be perfect for the R33. You only need a divisor for 6 cylinder cars in 4 cylinder chassis such as RB swaps into S13 Silvia's. Not needed, just nice to have later. Correct, late Nissans are 5v logic pulse, earlier cars are 12V logic pulse. They don't need the back-emf from the coil (speaking for most 1980s Nissans, earlier carby era likely will).

Added jumper for tacho voltage output selection.

Thanks!

Hell Fire - please post your dimension measurements for comparison, as I would like to cross check my measurements with yours before I order these PCB's.

Which measurements do you need? Give me a list and I'll see what I can do, somewhere in storage I have an R33 ecu, RB26 ecu, 300ZX Z32 ecu, R32 RB20 and an S13 SR20 ecu.

You'll probably be happy to know that R33's respond very well to a decent tune, they are very conservative in the higher-load fuel and ignition maps. With a stock turbo, front mount intercooler and a decent exhaust you'll end up somewhere around 200rwkw on 12psi with a decent tune. You can squeeze a bit more boost in if you don't mind chancing shattering the ceramic turbine wheel but personally I wouldn't.

[Dan]

Added jumper for tacho voltage output selection.

Thanks!

No worries! Thanks for pointing it out!

You'll probably be happy to know that R33's respond very well to a decent tune, they are very conservative in the higher-load fuel and ignition maps. With a stock turbo, front mount intercooler and a decent exhaust you'll end up somewhere around 200rwkw on 12psi with a decent tune. You can squeeze a bit more boost in if you don't mind chancing shattering the ceramic turbine wheel but personally I wouldn't.

I am running my ball bearing precision 5557SP turbo and tial 38mm MVS wastegate on it for a while initially, as I plan on running bigger on it when I slap some forgies in it later on when it is rebuild time

[Dan]

A solid nights work from me. Mostly background stuff, although PCB routing has commenced with CPU decouple caps, pll, clk and some io traces routed!

More to come soon!

[Fred]

Hell Fire - please post your dimension measurements for comparison, as I would like to cross check my measurements with yours before I order these PCB's.

Ditto Corbon and XR Pilot too, re dimensions, if they have them available.

EDIT, I see XR has come through without my interference. Good work.

[Fred]

Sorry, I'm only allowed out of the cage for sunlight and forum posting every 6 months. I try and get out more often but they keep moving the key :(

LOL :-)

In all seriousness though I'll try and catch you on Skype sometime soon, a fair bit has changed recently. I'm no longer living in Newcastle for one.

Sure!

If you can give a tach pulse for every count of the inner 6 tooth wheel (or 4 in the case of SR20's) then this will be perfect for the R33. You only need a divisor for 6 cylinder cars in 4 cylinder chassis such as RB swaps into S13 Silvia's. Not needed, just nice to have later. Correct, late Nissans are 5v logic pulse, earlier cars are 12V logic pulse. They don't need the back-emf from the coil (speaking for most 1980s Nissans, earlier carby era likely will).

Good to know!

Dan, commit PDFs on request only? No point in bloating repos?

Fred.

[Dan]

Just received some dimensions for comparison from Rob!



Cheers mate you're a legend!

NOTE: PDF of the above dimensions is attached also.

EDIT: I can also verify that the above dimensions confirm my own

[Hell Fire]

Got new batteries for my calipers, matches up with the PDF, go for it

[Dan]

Thanks Hell Fire!

[Dan]

Spent a bit of time on the RB25 PCB today! It's coming along nicely!