Their is more than three dizzys for the Z18T.
one is ,has twin pionts.
the next one is electronic,
the other is electronic with less wires going to it.
Plus the odd dizzy with the disc in it,rather than the sprocket thingy
mebob for the pick up.
well thats four that I know of.
Malcolm
Peter and Trace wrote:
>
> Chris,
> THe Z18ET doesn't use an ignition computer and the spark plug fire
> simultaneously throughout the rev range. I think the CA20 twinsparks fire
> as you described. Another interesting fact I have discovered, the knock
> control module retards the timing in an analogue (maybe linear) fashion.
> Not just on and off as previosly thought.
> Pete.
> ----------
> > From: Chris (CP) <[EMAIL PROTECTED]>
> > To: [EMAIL PROTECTED]
> > Subject: RE: Ignition timing
> > Date: Thursday, 27 April 2000 7:08
> >
> > noticeabiliy? I cant see it making massive differences. THe factory
> > computer cut the second set at 2000rpm anyway
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of malcolm cooper
> > Sent: Wednesday, April 26, 2000 7:03 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Ignition timing
> >
> >
> > They dont run as well on four ,they go better on eight.
> >
> > Malcolm
> >
> > "Chris (CP)" wrote:
> > >
> > > i seen people run em with bluebird elec dizzys. Just leave 4 plugs in
> the
> > > holes ya arent using. doesn't seem to effect em..
> > >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of Peter and
> > > Trace
> > > Sent: Monday, April 24, 2000 8:32 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Ignition timing
> > >
> > > Pete,
> > > You say that the figures in the table are not values in Deg
> BTDC.
> > What is
> > > the maximum advance angle be? I have a Z18ET with a poor dizzy with no
> > vac
> > > advance and 8 spark plugs. I want to ditch this setup in favour of
> > 'crank
> > > fired distributorless programmable home made ignition system' using a
> PIC
> > > microprocessor. I think I will still have to run 8 plugs though ( I
> dont
> > > want to ).
> > > Any help, advice, experience in this area??
> > > Regards,
> > > Pete.
> > >
> > > ----------
> > > > From: Pete & Kath Liebig <[EMAIL PROTECTED]>
> > > > To: [EMAIL PROTECTED]
> > > > Subject: RE: Ignition timing
> > > > Date: Friday, 14 April 2000 12:43
> > > >
> > > > Pete,
> > > >
> > > > As you would already know, there is no "ideal" curve. You gotta get
> the
> > > > right curve sorted out for your particular engine, given the boost,
> > > > intercooling, fuel type and how close to the edge you want to take
> it.
> > > >
> > > > The basic starting point though, is that you can run a fair bit of
> > > advance
> > > > at low rpm - this is then progressively backed off as you approach
> the
> > > peak
> > > > torque figure (3650 - 4000rpm in the case of the SR20DET). After this
> it
> > > > begins to advance again.
> > > >
> > > > Naturally more advance is run at low load and is then backed off as
> load
> > > > increases.
> > > >
> > > > I have maps for the standard ECU and some for a "tuned" ECU. The
> > standard
> > > > ones run heaps less advance - obviously for safety reasons. The
> "tuned"
> > > maps
> > > > make the engine go heaps harder - but you only need a very hot day or
> > > > slightly dodgy fuel and the dreaded detonation rears it's ugly head.
> > > >
> > > > Interestingly, the "tuned" maps run on an engine that is using
> standard
> > > > boost. It seems there are good gains to be had by running less boost
> and
> > > > very aggressive ignition timing. This particular engine feels very
> > strong
> > > to
> > > > drive, and doesn't suffer from the peakiness of an SR running
> standard
> > > > ignition timing and increased (14psi) boost (my car).
> > > >
> > > > You really need to have it setup properly on a dyno by someone who
> deals
> > > > with turbos on a regular basis. You can setup curves on NA engines
> > > > reasonably well yourself, but turbos are another story...
> > > >
> > > > I'll send you some info privately - too big for list.
> > > >
> > > > 'later
> > > > PL
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: [EMAIL PROTECTED]
> > > > [mailto:[EMAIL PROTECTED]] On Behalf Of Peter and
> > > Trace
> > > > Sent: Thursday, 13 April 2000 17:49
> > > > To: Ozdat
> > > > Subject: Ignition timing
> > > >
> > > > Hi everyone,
> > > > I am trying to get some information on the ideal/practical
> > ignition
> > > curve
> > > > for a turbo engine. Any help appreciated.
> > > > Pete.
> > > >
> > > >
> > >
> >
> >
>
--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.datascribe.com.au/ozdatonline/index.htm
http://www.datascribe.com.au/ozdatonline/listindex.html
---------------------------------------------------------------------
