[Diy_efi] RE: Nissan KA24E ECU and CAS

Wed May 10 18:41:22 UTC 2006

Welcome to the group...

I think the maximum resolution was 3600 rpm at whatever dutycycle was
there.  I only glanced quickly but it showed almost a 50% d/c (on/off)
whereas the application he'd be using it for would be at much less
resolution.

I know with my haltech i can custom setup my crank trigger circuit to do
whatever i'd like.  I'd imagine his MoTec would have the same type of
configuration options.

Another thought is that if there was a previous version of the engine with a
distributor, that you may be able to use the distributor shaft provided the
crank (or cam) gear has the spline drives on it.  Had to do this for a
friend on a GM V6 which someone had unfortunately snapped the crank sensor
in teh block (and let it rust in there)...   We took a V6 Fiero (which has a
distributor) and took the cap out, and simply used a distributor cap to
cover the assembly -- but all that was in the distributor was the hall
effect sensor which worked alright.  no cam sensor on that car.  (acutally,
the distributor was driven off the far end of the cam (pushrod V6).

If any of that makes sense, more power to you -- i'm going to bed.

Good luck!

On 5/10/06, Holt, Brent D PE431 <brent.holt at siemens.com> wrote:
>
> Hi Hugh,
>         I'm a newbie in the group... Just looking into doing some custom
> EFI set-ups for your typical junkyard turbo systems... Name is Brent.
>
> Anyway, I noticed on the spec sheet you attached that the sensor's max
> RPM is 3600. How do you plan to account for such a low rev?
>
> -Brent
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
> On Behalf Of hugh at sol.co.uk
> Sent: Tuesday, May 09, 2006 5:13 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] RE: Nissan KA24E ECU and CAS
>
> Mike,
>
> Thanks for your comments.
>
> The RB26 has a coil on plug set-up so plug lead interference is not an
> issue - although interference might be coming from somewhere else.
>
> I will check the ground.
>
> I have an M600 Motec ECU and the new V3 software has a REF and SYNC
> oscilloscope trace that you can look at which might tell me more.
>
> I am just finishing an install on a CDI system which may also alleviate
> things, but I think a hall sensor
> http://www.sol.co.uk/h/hugh/Ignition/Honeywell%20GT1%20hall%20sensor%202
> .pdf
> reading 18 clutch cap head bolts on the back of the fly wheel is
> probably
> the best answer.
>
> Thanks
>
> Hugh
>
>
> Interesting, this is rather different to the RB30 unit which
> has the same gaps per cylinder except tdc, I'll find my
> analyser traces somewhere - which show the pulse shape
> and number of pulses overlap to distinguish tdc from other
> cylinders. With the RB30 unit there are often reports of damage,
> unfortunately the EHT leads can lie against the CAS leads
> and any corona discharge (not a spark but a field effect) can
> impress noise on the signals - make sure you have a good
> separation between leads and check your ground connection on
> the CAS. On the RB30 unit there is an extra ground wire which
> goes to a spade on the body of the unit. it doesnt rely on the
> interface connector alone.
>
> rgds
>
> Mike
>
>
>
> At 02:20 AM 5/9/06, you wrote:
> >Here is a picture of the RB26 disc which looks pretty similar.
> >
> >http://www.sol.co.uk/h/hugh/Motec/RB26%20Trigger%20Disk.JPG
> >
> >I have a great deal of noise on my RPM trace and assume that it it
> caused
> >by cambelt harmonics probably made worse by high lift cams.
> >
> >Cheers
> >
> >Hugh
> >
> >Just email them to me Tom, my email address should be on the
> >top of your header, if not then here  niche at iinet.net.au
> >
> >cheers
> >
> >mike
> >
> >
> >At 03:02 AM 5/6/06, you wrote:
> >>How to mail a pic? I assume attachments will be stripped, so there's
> an
> >FTP somewhere?  I just took pics, not awesome ones, but between John's
> link
> >and the pics, some useful info should be gleaned.  In case it doesn't
> come
> >through, there is a fat slit in the CMP (sorry for the ISO terms vs.
> Nissan
> >ones, it's a habit!) portion of the wheel, which identifies cylinder
> #1.  I
> >have had an oil-fouled interrupter plate not fire the injectors every
> time
> >the blocked hole came around, so I know the inner ring of holes is used
> to
> >trigger the injectors.
> >>
> >>TomV
> >>
> >>Mike wrote:
> >>
> >>>Suggest email us a picture, because this sounds so much like the
> >>>RB30 CAS and I have done a study of that one, there is no cam
> >>>control but there are two lots of pulses which overlap to signal
> tdc...
> >>>
> >>>rgds
> >>>
> >>>mike
> >>>
> >>>
> >>>
> >>>At 12:00 AM 5/5/06, you wrote:
> >>>
> >>>
> >>>>1. Yup.  Fought one for a while; dealt with the same problem on an
> >Altima, and similar problems on the VG30 which has the same setup.
> >>>>2.
> >>>>3.  No extra or missing slits; the 360 slits are actually for the
> crank
> >angle sensor and the four slits, spaced inboard of those, are for the
> cam
> >sensor (cylinder ID,) with one being wider then the others.  The signal
> >conditioner makes the outputs into square waves.  There is no dead
> space in
> >the ring of 360.
> >>>>
> >>>>
> >>>>John Smith1882 wrote:
> >>>>
> >>>>
> >>>>
> >>>>>1. Do you know that for sure?
> >>>>>2. n/a
> >>>>>3. I know all about the sensor except what the conditioning circuit
> >does. Does it just "clean up" the rounded square wave signal from the
> >optical sensors, or something else? On the 360 slots, is there a dead
> space
> >like the #1 injector window?
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>>Date: Wed Apr 26 15:48:43 CDT 2006
> >>>>>>From: Tom Visel five10man at commspeed.net Subject: RE:Nissan KA24E
> ECU
> >and CAS
> >>>>>>To: diy_efi at diy-efi.org
> >>>>>>
> >>>>>>
> >>>>>>1. ECU will get all sorts of stupid without CAS.  Anything from
> not
> >running at all to limp-in.
> >>>>>>2. Don't know.
> >>>>>>3. 360 slots, photocoupler-read, conditioning circuit inside the
> >distributor.
> >>>>>>
> >>>>>
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> >>>
> >>>
> >>>
> >>>Regards from
> >>>
> >>>
> >>>Mike Massen
> >>>Network Power Systems
> >>>Lab 08 9444 8961
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> >
> >
> >Mike
> >Perth, Western Australia
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>
>
> Mike
> Perth, Western Australia
> VL Commodore Fuse Rail that wont warp or melt !
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> http://niche.iinet.net.au
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-- 
Sincerely,

Lee M. Lemoine
http://www.turbochargedsoul.com/
'06 Subaru Legacy GT Limited - 250/250 AWD 5EAT
'93 Chevy Cavalier Z24 Convertible - 300/330 FWD 5MT (Mclaren Turbo!)