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1

Omega Electrical and Audio Help / Re: Coil packs

« on: 05 November 2014, 16:21:57 »

Well, yes.

Ion sensing is the way forward but at a price one imagines.

I've got the Webers from a time way back when I had too much money & no wife or kids (maybe 16 years ago).

They're worth a quarter of their (considerable) original value so I may as well fit them to my car.

Fuel economy will be horrific, probably ~8 mpg, but this is a toy, not a everyday driver. 

2

Omega Electrical and Audio Help / Re: Coil packs

« on: 05 November 2014, 15:11:01 »

@Marks DTM Calib 

I'm going to run a fairly conservative advance map so I'm not expecting any trouble with knock.
But yes, it would be worth considering. I'm kind of put off because I know nothing about interpreting the knock signal.
Lambda sensor... its a single value, fine. MAP sensor, same deal. Knock sensor? It sends you an analogue mess of data and you need to know what it means.

@Kevin Wood 

Twelve 2nd hand injectors and a high pressure pump would blow my current budget by >200%. Plus I'd have to mount them all and make a fuel rail & route a fuel return line (or more accurately, fix the one that's there) and there'd be a lot more circuitry required.

I did look at dual EDIS-6 but it still runs in at over twice my current budget. And there's some problem with EDIS and minimum advance IIRC. You can't change it?  Can't quite remember but there was something I wasn't happy with apart from the price.

Cheers,

 Wilson.

3

Omega Electrical and Audio Help / Re: Coil packs

« on: 05 November 2014, 11:04:47 »

I looked at megasquirt and harder at megajolt.

At the end of the day, what with having a V12, the cost of extra parts, shipping from the states, etc made both uneconomic.

That and I want to learn to program microcontrollers. Its always best to have an interesting project if you're learning.

There's a lot of interesting information on ion sensing in this PDF:

https://delphi.com/shared/pdf/ppd/pwrtrn/ionization-current-sensing-ignition-susbystem.pdf

My XJ is here www.xj12l.com

Cheers,

 Wilson.

4

Omega Electrical and Audio Help / Re: Coil packs

« on: 05 November 2014, 09:50:04 »

@Broomies Mate

Poverty & a wean = cheap shitty motors.

Pranged the first one, bought a 2nd for £150 with a blown ECU and swapped out the good bits from the first one.


@Kevin Wood 

The engine management system is home made (or will be, still writing the assembler).
Its based on a 48Mhz PIC18F4550 because its cheap and has three 16 bit timer circuits. I started off with the PIC16F877 which also has 3 timer circuits but only one is 16 bit.

The goal is to keep all the code running in interrupts (bombproof) and have the timing done by the chip itself (i.e. use the hardware timers). I've got 2 VR sensors & rings, one with 5 segments and one on top of the other with 1 segment.
The single segment ring is setup for 10 BTDC on 1A. The other 5 let me fire the rest of the cylinders via the hardware interrupts. Each time the interrupt for 1A goes off it resets everything which means that any measurement that may be drifting can only do so for 1 revolution of the engine.
 
And it'll have a MAP sensor & coolant sensor and maybe one day, a Lambda sensor.

Actually what I'd like to have is ionization current sensing so I can run the engine at MBT (maximum brake torque) in a closed loop and junk all the other sensors. Its very sexy but the coils are one per cylinder and have all the funky sensing stuff built into each coil and I need 12 of them = big $$$. And the whole point of this is small $$$.

I'd post pictures and links & stuff but I appear to be on moderation.

5

Omega Electrical and Audio Help / Re: Coil packs

« on: 04 November 2014, 21:57:12 »

@Taxi Al  yes, its the two Dis packs

@Temetsy Thanks, I'll pm you my email.

Basically, I need to know if I can leave one side of the primary permanently on all the time and just bring the other side of the primary to ground to fire it or if I need to switch the 12V line on shortly before grounding.

Its quite important as it means adding another timing circuit and another map. Which would be a gigantic PITA.

Cheers,

 Wilson.

6

Omega Electrical and Audio Help / Re: Coil packs

« on: 04 November 2014, 18:51:33 »

Thanks guys!

I don't have an Omega so I can't check the wiring.

A link to a schematic would be great

I'm here for an odd reason. I want to make a distributorless ignition for my 1973 Jaguar XJ12 because the distributor is a) shagged, b) fouling one of the six double barrel downdraught Webers I'm trying to fit to it.

The Omega V6 coil packs look to be about right for what I'm doing.

I am, to be fair, more of a Vauxhall man than anything I guess. My father & I put 250,000 miles on his X reg Cavy. 1 clutch, 2 cams, 3 sets of CV joints, 1 big end renewal (my fault).

I did rent a Omega when they first came out. It had a slush box and the brakes were horrendous digital devices. ON or OFF.

I would have loved a Senator.

My vehicle history...

Vauxhall Viva SL90   1983 - 1989
Jaguar XJ12L  SII   1989 - present
Vauxhall Carlton      1990 - 1993
Vauxhall Cavalier   1993 - 1995
Ford Cortina      1995 - 1996
Vauxhall Cavalier   1995 - 1999
Maxda MX3      1999 - 2002          (a bit gay but pleasantly nippy V6)
Volkswagen Golf GTI Mk2   2002 - 2005  (awesome but rusty)
Volkswagen Golf GTI Mk3   2005 - 2007  (shite & rusty)
Honda CRX               2007 - 2007           (mental go-cart of a thing)
Fiat Brava             2007 - 2009
Fiat Brava             2009 - 2011
Ford Courier 1.8D     2011 - present (1994, 1 owner, FFSH, given to me. handy)

Current vehicles: Ford Courier 1.8D,  Jaguar XJ12L  SII

7

Omega Electrical and Audio Help / Coil packs

« on: 04 November 2014, 15:45:33 »

Hi All,

 Are the V6 coil packs single or wasted spark?

 Also, which pin is +ve?

 And... expert question... are these coils held at 12v all the time till the ECU brings the primary to ground or is the 12V line switched on & off as required by the ECU?

(BTW my coil has 4 control pins and 6 turrets for plug leads)

Thanks,

 Wilson.