Chris, Mixture trimming is usually used when changing the size of the injectors or pressure reg.The microtech should have no problems controlling the injectors at idle unless the injectors are very big or leaking or just have a poor spray pattern.Fluctuating vacum can also have an effect at idle.From memory you were running a mtx8 with a fj20 dizzy as a pickup and using the microtech to drive 4 coils.This means that you are running sequential injection with variable injector timing so you should be able to get a good idle.You can also run it off your tps at idle.Who is tuning your car? You should be able to get the 14 by 1.25's from covs or you could try looking around at some z24's as ive seen them with the blanking plugs.Usually out of those 2.4 skylines.Sorry to butt in but i'm curiuos as to why they cant get good injector control.Ive seen a z18 with a digi2 running 12a turbo injectors in batch fire and it ran pretty rough at idle,would just stall every now and then. Andrew Smith
FJ MAN wrote: > Yeah now worries, i was really just questionin the need for the mixture trim > if he went through and tuned the whole lot. Just been speaking to a few > workshops lately and the popular concesus is that mixture trim isnt a good > idea. Im not having a dig at all dont get me wrong, just interested in the > timin/duration/pulse of your injectors especially at idle etc coz as i said > we struck initial troubles with the microtech unable to control them. Also > what have u done as far as blankin off the exhaust plugs ( did u grind them > down flat or anything as i was told at higher rpms and boost etc they lead > to pinging as they get to a temperature where they ignite the fuel again. So > i went out chasing blanks but no one stocks 14mm 1.25s so i guess ill have > to grind down the plug electrodes. Sorry for the novel just interested in > getting a few opinions and you seem to be getting good results from the z18 > so far. > regards chris > > >From: "steven.taylor" <[EMAIL PROTECTED]> > >Reply-To: [EMAIL PROTECTED] > >To: [EMAIL PROTECTED] > >Subject: Re: Z18ET limits. > >Date: Thu, 22 Nov 2001 04:29:49 +1100 > > > >Mate im only using a Digi 1 microtech and it runs all the functions it > >controls > >beautifully. I get it dynoed down at Croydon autosports. I do all the > >prepping > >and they play with the computer. It took Jim a couple of hours i think on > >the > >initial tune to set everything up properly. From then on it has only needed > >1/2 > >hour sessions to re-tune it for mods that ive done.Basically pretty happy > >with > >it overall, has no flat spots, starts first go etc etc just like efi should > >be.... > >Steve. > > > >FJ MAN wrote: > > > > > Steve just curious, when you said you had a 30% mixture trim when your > >cAr > > > hit the dyno, was it tuned throughout the rev range at cruise, WOT etc > >as > > > well as this (just got mine tuned recently is all and the only thing i > > > discovered was that microtech is crap when it comes to controlling the > > > injectors (ca18det) injectors with it either runnin really lean or > >really > > > rich (1.2 or .75 on the lambda sensor, but at 1.12ms we eventually got > >it > > > down to perfect) basically just curious about how the comp works overall > > > with your set up and how long u had to tune it for etc. > > > hope this makes a bit of sense hah > > > regards chris > > > > > > >From: "steven.taylor" <[EMAIL PROTECTED]> > > > >Reply-To: [EMAIL PROTECTED] > > > >To: [EMAIL PROTECTED] > > > >Subject: Re: Z18ET limits. > > > >Date: Wed, 21 Nov 2001 07:55:54 +1100 > > > > > > > > > Adam, > > > > > As was my experience modding a z18et. Basically youll run out of > >fuel > > > >first. If your fuel supply system is adequate then youll need to > >firstly > > > >change your computer, then change your injectors (ca18/fj20det easiest > > > > > bolt in). Combine this with your i/c, decent exhuast and a decent > >tune > > > >and you should be able to run 15+psi easy. > > > > > > > > > "Rowe, Adam" wrote: > > > > > > > > > > What are my limits if I start increasing my boost on the Z18ET? I > >have > > > >factory injectors, AFM and computer. I will be fitting an intercooler > >and > > > >would like to know what will max out first as I increase the boost. > > > > > > > > > > Adam Rowe > > > > > > > > > > > >--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.ozdat.com/ozdatonline/index.htm > > > > > http://www.ozdat.com/ozdatonline/listindex.html > > > > > http://www.mail-archive.com/[email protected]/ > > > > > > >--------------------------------------------------------------------- > > > > > > > > > > _________________________________________________________________ > > > Get your FREE download of MSN Explorer at > >http://explorer.msn.com/intl.asp > > > > > > > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp > --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.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
