MSD 6A installed and triples running right, finally!

I got around to installed a MSD 6A ignition module to help with the weak spark mentioned in the previous post and it has improved the car’s driveability tenfold. I took it for several runs through the hills, alone and with a passenger and there’s a slight hiccup here and there, but for the most part, it’s awesome!

In the long term, I’d like to eliminate every hiccup and stutter it has but it’s spring, approaching summer here in Australia and I just want to drive it.

Thanks to Ying for the photos and always leading our daytime drives.


Lost the spark

It’s been a while since my last update and not much has really happened..

Still trying to tune the triple OERs. While doing so, my ignition system has died a little. Plugs keep fouling and the strength of the spark is very weak. So weak that it left me stranded a number of times..

I feel like I’ve found the right idle/pilot jet for the car but the slightly rich idle fouls it too easily. So with the poor tune of the carbs mixed with the weak ignition system, the car’s pretty much undriveable. I threw the stock carbs back on and went for a drive.

Idling for too long with the stock SUs cause some issues as well so I have done a little research and have purchased an MSD 6A ignition unit. I shouldn’t have any issues with spark now.

I will get it installed and will update. Other than that, I have installed my TechnoToyTuning rear camber arms and pulled a bit of the camber out which is good.

OER triple carbs on and fine tuning

Hi all, it has been a while but I thought I’d give those of you who are following a little update.

The OER carburetors have been installed for a while now and the past couple of months have involved the tuning of them.

Tuning of them hasn’t been hard.. With a wide band O2 sensor probe in the exhaust and a safe piece of road, I was able to get the car going straight off the bat. Wide open throttle has been the easiest to tune, while idle, cruise, and low to medium acceleration has been the most challenging.

I will do a little write up on how to tune the carbs at a later date, but depending on what rev range you’re in and how much throttle pressure you’re using, you are using certain jets. There is the pilot, main, and air corrector jet which controls cruise/idle/low revs (and throttle), mid range RPM and full throttle, and upper range full throttle respectively.

And because the pilot jet is the main jet you will be using on the streets, it has been the most difficult to tune. The one jet affects your cruise mixtures, slow acceleration mixture, and idle mixture. So far, idle and cruise mixtures have been spot on but slow acceleration mixtures go a tad lean (no matter what jet size I use) which is obviously not safe for the motor. 12.5-13:1 AFR is the goal for wide open throttle, 13.5-14 is the aim for cruise and similar for idle.

You can see in the graph below, I am taking off in first gear at a medium rate, shifting into second, accelerating and then shifting into third and so on. The rich dip soon after gear change is due to the pump jet (yes, another jet you can change!). Note how it goes lean as I stay in a gear.

The issue here (I hope) is that OER pilot jets have a fixed air bleed hole and this contributes to the upper mixture of the lower, pilot jet, circuit. I have since purchased Weber jets which supposedly fit and I will use them to fine tune.

I am currently running #55 pilots which provide a spot on cruise and idle mix but lean acceleration. This OER jet has two ~1.2mm air bleed holes, and to richen this mixture up, I need to reduce that size. I have purchased Weber #55 pilot with air bleed holes half that size. We will see how it goes.. I have played with fuel float levels, throttle plate positions, balanced the carbs, checked timing and it has all fail to rectify the problem.

Kameari Japan and my triple OER Carburetors

So I’m back from Japan and my main goal of the trip was to pick up a set of triple carburetors. I ended up with brand new OERs which I bought from Kameari in Tokyo.

Triple 45mm OER carbs with L6 manifold and linkages, spare jets, 34mm venturis, heat shield, and fuel float level gauge. All of that and a broken bank account.

Lets revisit Kameari though. I had to catch a train to Yashio Station and then a taxi to get to Kameari, about a hour trip each way.

A relatively small workshop with a small store front, but it felt like they had everything needed to build a wild L series motor..

From pistons,

To extractors,

To well.. valve springs, valves, cranks, etc..

I thought I was going to be excited to see one of these but I got over it when I saw them at the JCCA New Year Meeting earlier in the month..

Kameari President Mori-san was a pleasure to deal with along with Seshimo. They had my carbs waiting for me and it was just a matter of giving them all of my money and taking the gear with me.

I did say I caught a train to and from Kameari, didn’t I?

Anyway, I got back to my apartment and took it all out for some photos and admiring all the shiny bits.

Then it was home time to try and get these babies installed and tuned…

Enjoying the car for what it is.

Updates are few and far between here now since there’s really not much else to do but drive the old girl!

I have just been driving the Z as much as I can, as often as I can since it is summer here in Australia. Every opportunity I get really.

The car has really been flawless..

Here are a few sample photos of the company I have been with, but please visit the below blogs for the full coverage!

Ying’s Noisy Ninja:

Charlie’s Jzxgarage:

And here are some pictures because everyone loves pictures..

And more recently, I have received Techno Toy Tuning rear lower control arms for my 25th birthday present from friends.

The main thing I would like to purchase now while I’m in Japan at the end of January is triple OER carburetors. Everything else is just a bonus.

Classic Japan 2014 Preparation – New cylinder head, front lip repairs, and seat installation

There were many jobs that needed to be completed by the 7th of December to make it to the 2014 Classic Japan event. Following on from the previous post, I had to repair my damaged front lip, change a head gasket/head cylinder due to an overheating issue and install my Kameari seats! This needed to be repaired.. I wasn’t going to fork out another $450 for a lip.. And these needed to be installed. Within the first week of working on the lip, allocating an hour or so every day after work into it, I managed to turn the lip into something like this.. It was at least one piece again. All fibreglassed back up. And then I managed to get some filler onto the lip to even out the large imperfections and it pretty much just sat like this for the next few weeks.. The tedious task of fixing the small imperfections took its toll. I could not be bothered doing it but as long as I managed to get rid of one spot a day or two, I was happy. Eventually, I got over seeing the lip in all different colours, making it harder to spot the imperfections also, I gave it a lick of primer. Work picked up on it and then it eventually got done a week before Classic Japan. Good as new! Rewinding a few weeks, during the stages of me not being motivated to repair the lip, I pulled my head off to see what the issue was. My car had kept chewing through coolant without a sign of any leaks. Nothing real obviously wrong with the head. Oh no.. What’s that in cylinder 6? Yep, there’s the coolant. So it was time to strip the head, get it skimmed and put a new headgasket on and hope for the best. And what can I say, things didn’t go to plan. The head was far too corroded to be reinstalled or repaired. As you can see in the cylinder closest, the water gallery is far too close to the combustion area causing the head gasket to go and leak water. I could reintall the head and use it for a short term but it would eventually blow again. It was time to source a new head, and that’s what I did.. $450 later.. Filthy, but it wasn’t as corroded as my old head. I stripped the head down, replaced the valve stem seals. Thanks to my mate Ricky for lending a hand get the valves back in. Home made tools aren’t the easiest things to use! Having adjusted the valve clearances, the new head was ready for installation. Those of you familiar with the L series motors, you would know that something needs to wedge into the chain to hold the tension while you remove the head.. Well I thought I did that right but… As you can see, I didn’t wedge the chain properly and had to remove my entire front casing to fix this up. A 15 minute job of reinstalling the head turned into a few hours. Anyway.. head went back on and all is well! While the head was off, I also painted my rocker covers wrinkle black, I unfortunately don’t have a photo of that yet. EDIT: Here it is..

Some of you may recall my cooling system being over pressurised and pouring out of the overflow once it got warm. Turns out it was the thermostat being installed the wrong way! Oooopssss… Easy fix. Now that the car was driveable again, that motivated me to finish off the front lip.. Last job before Classic Japan, installing the Kameari seats. Comparing them to the standard seats, the Kameari seats were a lot narrower so the rails needed to be modified. Simple enough.. Little did I know that ‘simple’ task took an entire day of running around. It got in there eventually. They look great! Tight around the hips but bearable. The car is now ready for Classic Japan which was held the following day. Sunday morning came around and it was pouring down with rain. A group of us woke up at 6:30am and had a talk about whether we were going to the event. Some of us had never driven in the rain before. With Classic Japan being one of the biggest events of the year, and the amount of effort we all put in to get the car ready, we decided to go… It was a great turnout despite the poor weather. Driving in the rain was very interesting. Windscreens fogging up, wipers not working properly.. Definitely an experience. 1pm rolled on by and the weather had taken a turn for the worse so we decided to leave. Charlie and I raced.. I lost lol. I had no traction whatsoever being on the tram tracks. Charlie – 1, Adam – 0. We all lined up at Karl’s place and went for lunch. And that’s how it all went down. Everyone made it home safe, defect free. My car gave me no troubles. On the way home, this happened. The clocks went around and I now have a new car! I have a trip to Japan booked for January 2015, this is where I will be attending the JCCA New Year Meeting in Tokyo. For those who aren’t familiar with the JCCA New Year Meeting, it is basically one of the biggest gatherings of classic cars in Japan, where a swap meet is also held! I can’t wait to see what I could pick up over there. Triple carbs is next on the list. Until then, it’s all about enjoying the car this summer.

OEM Head light covers, Kameari Seats, and Broken Air Dam

Hey all, so following on from my previous post about future mods, I had planned on buying OEM head light covers and triple carburetors.. I have not yet picked up a set of triples, but I have got the OEM head light covers and purchased Kameari seats.

Before I get into that there were a few little things I wanted to do. I first cut and rewelded the shifter as after installing the RB gearbox, neutral was sitting far too close to the radio.

You can see the angle the original shifter was sitting at. I simply cut it at the bottom and rewelded it together where it needed to be.

Second issue was the leaking heater tap. You can probably see why. This fixed up the hot interior even when the valve was closed.

Next up was the refurbishment of the steering wheel. I just gave it a new lick of paint and tried to clean it up a little and I think it now looks great.

So while I was researching triple carbs and looking out for head light covers, these seats came up at a price I couldn’t turn down so I picked them up on the day. Kameari seats! I actually don’t think they’re the real deal but who’s to complain.. I think they’ll look great in the car.

I am yet to have these installed, just been a little lazy!

Next up, I bought a pair of very average condition OEM head light covers from Yahoo Japan. Not the cheapest things these days but I think my car needed them and I think they look awesome on the car!

I think they have set the front end off with their chrome trim. Comparing it to how it was before..

Once the head light covers were installed, it was great weather for a drive on Sunday.

Going for the drive though, it was obvious my head gasket was gone. Throughout the day, my car chewed through over 5 ltrs of coolant.

Some great shots were had on the day, thanks to Ying and Charlie.

After these photos were taken, I unfortunately ran over a small branch and it ripped my entire front air dam off along with my indicators and it went under the car.. It was a windy day (heaps of fallen branches) and not being able to see very far in front… 😦

You can read more and see more photos on Ying’s awesome blog ( And so I drove home without indicators and this is how the ‘lady sits while I try to repair the air dam..

Once the air dam is repaired, I will need to source new indicators and eventually get around to changing my head gasket. The car isn’t driveable in its current state.

Deadline is Classic Japan on the 7th of December! Until then…