Gonna start a build and see where it goes ===> TWINSCREW !!! :-p

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jondee86
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Re: Gonna start a build and see where it goes ===> TWINSCREW !!! :-p

Postby jondee86 » Sun Nov 04, 2018 7:50 pm

Yeah, I was surprised that the GZE coils couldn't keep up with my modest tune.
They are made for a supercharged engine that runs 8psi stock, and I used them
because I thought for sure they could stretch to 15-16psi. Maybe I have bad plug
leads... I'll test them tomorrow. Or maybe spraying water-meth makes it harder
for the spark to jump the gap ?

I gapped down to 0.6mm and got some improvement, and then down to 0.5mm
and all but eliminated the misfiring. But I want to run 0.8mm and figured that
COP's would get me there. I got them off a guy who uses them on all his N/A and
boosted 4AGE builds and never had any problems with the 1NZ units. But we are
talking 20-25psi drift or road cars, not 30psi plus monsters.

The other reason I decided to change to COP's was so that I can run full sequential
fuel and ignition, and phase the injectors correctly. This is supposed to give a
smoother running engine, and I'm all for that. If the 1NZ COP's don't give me clean
ignition with an 0.8mm gap, I'll go with Plan C which is some LS smart coils :)

EDIT: Thinking about what I said above regarding phasing injectors... they are
actually already phased correctly (sequential following firing order). And even with
wasted spark ignition is essential... it has to fire each cylinder at the right time
in the correct order or the engine would not run. So no real gain with COP's fired
sequentially except that the coil only fires once every 720 deg of engine rotation.

And as far as the GZE coils go, I remember now that I powered them from the
keyswitch via the factory ignition circuit and 35 year old wiring. Could be that there
is a bit of voltage drop there that is causing the weak spark. I'll try and check that
tomorrow as well. I was planning to run a dedicated power supply for the COP's so
if need be I can install that and hook it up to the GZE coils to see if it makes any
improvement.

Cheers... jondee86
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jondee86
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Re: Gonna start a build and see where it goes ===> TWINSCREW !!! :-p

Postby jondee86 » Mon Nov 05, 2018 2:28 pm

In order of length, the leads (OEM) test at 9.33, 8.52, 6.54 and 4.02 kOhms. This
is within the 1000 Ohms/inch of length guideline and so I call the leads good.

Now to figure out a way to test the voltage to the coil with the engine running ?

Cheers... jondee86
Give a person a fish, they eat for a day. Suggest they search before posting, and they learn a skill for a lifetime.

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jondee86
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Re: Gonna start a build and see where it goes ===> TWINSCREW !!! :-p

Postby jondee86 » Tue Nov 20, 2018 9:14 pm

Onwards and upwards... bought the bits so gonna put them in whether they
are justified or not :) Made a start this afternoon...

Image

Cam covers are a bit scruffy but they will do the job. I might get another set
and refurbish them. But first I need to get the new wiring done and get the car
running. Passed the LVVTA Cert inspection and should have the plate affixed
to somewhere on the car in a few weeks. Usually goes on the firewall but I don't
have a lot of clear space, so will need to get creative :)

Cheers... jondee86
Give a person a fish, they eat for a day. Suggest they search before posting, and they learn a skill for a lifetime.

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jondee86
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Location: Wellington, New Zealand

Re: Gonna start a build and see where it goes ===> TWINSCREW !!! :-p

Postby jondee86 » Sat Dec 01, 2018 4:47 pm

Took a while, but I finally got the COP wiring completed. I don't like having a lot
of unnecessary joins in important wires, so I bought some new DIY kits for the
coil clips. You have to assemble the clips and crimp the tiny pins onto the end of
the wires. Bought an AMP-TYCO crimping tool from China and it does an awesome
job of crimping the wire and the silicone seals at the same time. I was a bit
aprehensive to start, but soon got the hang of it :)

Image

Ran a new power supply for the COP's via a relay controlled by the ECU. Coils only
get power if the fuel pump is running for safety reasons. Fresh grounds to the
engine block and ready to fire it up... but discovered a screw up with my wiring
for the relay control that needed sorting. But once that was done I hit the key...
BAM...fired right up and ran like nothing had changed :)

Have to put a bunch of stuff back together before going for a drive to see if there
is any difference. I don't know of any reason why full sequential should perform
any different from wasted spark, but since the ECU can drive four ignition outputs
it seemed like a good opportunity to make the change.

Cheers... jondee86
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Re: Gonna start a build and see where it goes ===> TWINSCREW !!! :-p

Postby jondee86 » Mon Dec 03, 2018 12:29 am

Also was given a set of these by someone who had changed injectors...

Image

They have hardly been used and RC's were a popular upgrade injector back in the day.
High impedance (saturated) RC SL9-550 and look to be a straight drop-in install on a
4AGE, so I'm gonna give them a try. Got some EV1 to DENSO adapter pigtails that will
let me plug the RC's into my existing injector harness with no cutting or splicing. That
way if they don't work out I can easily swap back to the DENSO's. If they work well then
I will get some new EV-1 clips and crimp them onto my harness for a permanent install.

I need a bit more headroom as I am hitting over 90% injector duty cycle on the 440's
and I'd like to stay under 80% duty cycle to avoid any lean out issues.

Cheers... jondee86
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