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33136

General Discussion Area / Re: Best diet

« on: 22 January 2008, 22:11:57 »

Just cracked open a Christmas present, actually. Fortnum and Mason's Christmas mincemeat shortbread biscuits. 8-)

Probably not what you wanted to hear but they're very nice.

16 stone and counting...

Kevin

33137

General Discussion Area / Re: Better V6 Manifolds

« on: 23 January 2008, 23:45:08 »

That's handy!

I would imagine a simple resistor will work for the heater as you say. My guess is that the ECU will look for some activity on the post cat sensors when cats are cold to verify that the sensors are actually working and then for them to go quiet when the pre-cats are up to temperature. Just a guess though. :-/

Kevin

33138

General Discussion Area / Re: Better V6 Manifolds

« on: 23 January 2008, 23:22:58 »

I'm guessing this circuit would have to mimic a cold start waveform to satisfy the warm up period (Control by relay switching from the cat heater feed maybe?) then switch to a waveform that would satisfy closed loop operation.

Or am I way off the mark?  Roll Eyes

Nope. That would pretty much do it. Lambda sensor heaters are normally on all the time after engine start, though. They're not pre-heaters AFAIK, but you could probably fool it with a timer that simulates cycling of the sensors for a minute or two after the heaters fire up and then switch to a constant rich signal. You'd also need an artificial load on the heater output as the ECU will detect an open circuit otherwise.

Kevin

33139

General Discussion Area / Re: Better V6 Manifolds

« on: 23 January 2008, 22:49:11 »

Pre cat Lambda sensors would have to stay because they control the fuel mixture, so bosses would have the be fitted to the manifolds for those.

The smaller pre-cats (in the elbow of the exhaust) would go. Not sure if you'd need the downpipes. The manifolds would probably extend further than that, looking at them.

The post cat Lambda sensors (which are before the main cats but after the pre-cats) would go and be replaced by a circuit that mimics their output signal.

I reckon it'd work. Goodness knows how you'd fit them in the car!

Kevin

33140

General Discussion Area / Re: Better V6 Manifolds

« on: 23 January 2008, 22:19:46 »

I like those.  

Someone has swapped all the keys over on their keyboards though.

Just had a thought, I dont think they will fit due to the position of the steering box

Quite possibly. They are clearly quite different left and right.

Also have to be aware of the 3.2 pre cat issue.... even better, find a way to trick the ecu and remove them. The main cat does a good enough job on it's own.

I think I could sort that. Bin the pre-cats and synthesise a signal that looks like a post-cat lambda output (but is nothing of the sort!) and keeps the ECU happy.

Kevin

33141

General Discussion Area / Re: Funny that needs an irish accent

« on: 23 January 2008, 15:24:38 »

 

33142

General Discussion Area / Re: usefull for profs and expert DIY'ers

« on: 23 January 2008, 16:41:35 »

And I do sofware development although a bit different subject..Money..

I do it for money too, of course

Kevin

33143

General Discussion Area / Re: usefull for profs and expert DIY'ers

« on: 23 January 2008, 14:20:05 »

Kevin whats your job, Electronics or something closely

related ?

I have a degree in Electronic Engineering and it has been my hobby since before I can remember. I work in software development for mobile phone test systems so a little different, which is OK because I wouldn't be interested in it as a hobby if I did it all day at work.

Kevin

33144

General Discussion Area / Re: usefull for profs and expert DIY'ers

« on: 23 January 2008, 14:08:50 »

wow..six oscilloscopes ..

All were old basket cases that I bought on EBay or at junk sales for pennies and then fixed.

Some poeple can't stand to see an Omega scrapped - so they buy it. I'm the same with electronic junk I guess.

Those ones are rather expensive - and probably over-specced for vehicle diagnostics. I keep meaning to find a cheaper solution.

I saw one card you could plug into the cartridge slot of a "game boy" to turn it into an oscilloscope 8-)

Kevin

33145

General Discussion Area / Re: usefull for profs and expert DIY'ers

« on: 23 January 2008, 13:37:32 »

They do look rather handy. Then again, as Mrs. KW points out whenever I go glassy eyed over gadgets, I have (counts on fingers) six oscilloscopes already. None of them are exactly portable, though, and thus unsuitable for car use.

But the ability to connect up some signals, drive around for a while logging them and then review what you've captured would be very nice.

The videos on that site are a good source of information. Teach the basics about how the sensors work and what waveforms you are likely to see under a bonnet. Happy to see an Omega starring in the video. Probably the first faulty car he came across.

Kevin

33146

General Discussion Area / Re: Car transport...

« on: 23 January 2008, 14:16:37 »

It's a long drive without PAS or servo brakes - unless you give the driver a pipe to the servo he can suck on?

Also you will have complications with the auto gearbox unless the prop is disconnected. :-/

It's a real shame Omegas are so heavy because it's a no brainer to chuck a kit car on a trailer (or in the back of a 7 1/2 tonner). Done it many times. You'd need something with a towing weight the wrong side of 2 tonnes to shift an Omega on a substantial trailer.

Maybe hiring a trailer plus a vehicle that'll tow it might be the most cost effective way?

I guess even an RAC job just up the road from the seller would be hard to pull off.

Hello?
<Can I help you?>
Yes, I hope you can. Both of my cylinder heads appear to have vanished  

Kevin

33147

General Discussion Area / Re: Okay, so tell me,

« on: 23 January 2008, 19:47:34 »

.. oh, and all the dieters had better stay away from Telford if we've got Max and Bob Dent on the grill  

Kevin

That rules out Pete straight off then, he'll put that 8lb back on

Unless he jogs down there and back?

Kevin

33148

General Discussion Area / Re: Okay, so tell me,

« on: 23 January 2008, 09:39:53 »

.. oh, and all the dieters had better stay away from Telford if we've got Max and Bob Dent on the grill  

Kevin

33149

General Discussion Area / Re: Okay, so tell me,

« on: 23 January 2008, 09:38:02 »

I guess it really comes down to one thing: How much do you want a manual gearbox against everything else?

For me, if I wanted a 3.2 manual, I'd probably buy a tidy car and convert it to manual but that puts most of the expense (and work) up front in one job. The advantage of doing it the other way is that you have a car on the road with less initial outlay and you can replace bits of trim, seats, etc. as you get round to them.

I guess I'd just much prefer to do the gearbox change than sorting lots of niggling issues with the rest of the car but that's just me.

Kevin

33150

General Discussion Area / Re: Okay, so tell me,

« on: 22 January 2008, 21:31:57 »

Hi Max,

Trust you are well.

Sounds like you've got a nice little project on the go there.....

 

Kevin