All Activity

I ruined a GM HEI module by running the engine with two spark plugs disconnected. I assume that a stray high voltage discharge, or some sort of "flyback" (it's a thing), made its way through the module. After I turned the engine off and reconnected the wires the engine wouldn't start. I checked spark and got a weak orange spark. The engine would start with starting fluid but would not without. Put a spare new module in and it fired right up. How about some details, just for fun, on the new electronic? Is it a ZX type or Pertronix or something else?

Plugs are new numbered Nissan. Don't suspect them... Distributor is new electronic from Ebay. No resistor. The cap doesn't locate very positively. So being made in China makes it a suspect...

I'm still trying to figure out what caused this kind of damage 🤔

I've also seen old plug wires crossfire or short to ground. Waaayyy back in high school working with old worn out car parts. Used to have to arrange the wires to avoid problems. Also seen that visible weak spark does not always spark under cylinder pressures. Had a weak ignition module once. You're probably running points though?

Correct firing order? 1-5-3-6-2-4 CCW?

You can back out combustion chamber volume using compression ratio and displacement. The 1972 FSM has the numbers. And if you have the head and block in hand you can take some measurements.

How about the old standard of mixed up firing order? Just watched a pro do that. It happens.

Do they have good grounds? Have you tried to bench test them?

New quandary. Need some help! The car is not running on all six cylinders. Using an IR gun the rear 4 are fine over 200dF in just a short period of time. #1 is cooler in the 150dF range and #2 is cold at about 90dF. So we ran a compression test this afternoon. All of them in the low 180#'s except #6 is 178#. So we ruled out valves or stuck rings?? With a timing light I checked all six yesterday and the light strobed on all 6 cylinders. So the plugs are firing?? We moved the plug wire from #2 <-> #3. Same problem and plug #2 was pretty clean... It seems to me if we had a fueling issue then #1-3 would all have issues?? So grasping at straws: An obstruction in the intake manifold or exhaust header? #2 isn't actually sparking? Some problem in the distributor cap? There is not enough fuel in the front intake manifold and #4 just takes it all?? Don't have the patience for this... :(

My horns are not working, I've checked and get power to both so I'm guessing it's the horns themselves. I am thinking I'll replace them and take my time taking them apart to fix when I get around to it. So today's question is what do people suggest? I found this set that seems like a good option: https://www.godzillaraceworks.com/electrical/hella-supertone-horn-kit-for-datsun-240z-260z-280z-280zx-fairlady-z I know that the red will stand out, i could always paint them black.

I happen to have a complete E30 head that I have never been able to sell, quite a niche market for sure. I’m in Western Canada, send me a PM if you want to discuss getting it to you.

Hi guys, this week i sold my 240z! It needed a good service as the engine leaked some oil, the body needed some work and.. i don't have the energy to work on it i will now concentrate on the engineroom of the 280zx i had restored in the past years.. I kept my self made mahogany steeringwheel and gave the new owner the rear wheel arches that i had stored on my attic with the car and some other nice parts to make an nice driver car for every day. As you can see in this pic the car has glassfiber rear arches and they are not original. As i said, i will now with some help of a friend, going to work on my almost ready 280zx! He also helped to get the lighting ready in my carport as he is a electrician as i am also! I finished also the air to air heat pump in my garage, so we can work on the 280zx coming winter. It was a bit difficult to let the 240z go but i had it for 27 years, and drove it for 25 years! It was a blast!

Thanks, so i took a look at my own, also orange model and that is a 1971 240z model.. so not the Franklin Mint model.

I think that I saw that or something similar on PBS or one of those channels. It was more focused on the main guy with the mustache. Rick Hall. Pretty fascinating show. https://en.wikipedia.org/wiki/Rick_Hall

Hello all, long time lurker, first time posting. I have a L20A engine that I am currently rebuilding and I have some questions I am hoping someone can help me with since there’s not a lot of information on the earlier engines in the US. First, my problem is the original E30 cylinder head was missing and all I was able to obtain was the E31. It’s my understanding that the E30 had smaller valve(s) and a smaller combustion chamber. I think the E30 was 36-38cc and the E31 is 42.5? My second issue is, the original pistons were garbage, and I can’t seem to find factory replacements. I have been looking at the KAMEARI light weight street pistons (SP-L20401-79) that are 79mm. I understand that I would need to go to a full floating rod to utilize these. I was looking at the CXracing L24 rods which are 133mm long like the L20a rods. My questions are, possible valve interference with the engine block due to the small boar and the oversized E31 cylinder head valves. Next, low compression ratio due to the higher cc head and the new pistons. Any advice on this situation would be much appreciated. Links for the rods and pistons below: Pistons https://www.kameariengineworks.co.jp/4-catalogue/2024.8.7-English-cataloge-v4/E0011.pdf Connecting Rods https://www.cxracing.com/ROD-L6-1330x6?srsltid=AfmBOoq1seHAZKHRIzfi8Ty5q1oPRFdG1V-m7n75OsCHTH5WlRE-H_q4i8Y

Here's a nice No Reserve 72. Already up to $25K. https://bringatrailer.com/listing/1972-datsun-240z-379/

Here's one of those weird songs you might have heard once or twice but never knew who played it. Interesting story behind the band.

Here's the Franklin Mint model.

First: Thanks Carl! for your explanation. This happened also overhere in the Netherlands with one of ..i believe.. member of the Dutch z & zx club! (many years ago) To make a euro version from the 240z.

Racin’

In Brief: Paul Taylor is the person that bought HLS30 02545 from Bill Reagan, the person that restored HLS30 02545. Paul then took his Datsun 240Z to a Z Car Club Association (ZCCA) annual convention. There I believe it caught the attention of a company that produced/sold fairly high end Die Cast Models: The Franklin Mint. They talked Paul into allowing them to use his 240Z as the model - for their Die Cast model. Thus it became the Franklin Mint Model. At issue AIR they sold a limited edition for ??? $125.00… Paul’s Z was also invited to the Automobile Hall of Fame’s Ceremony of Mr. Kayatama being inducted to the US Automobile Hall of Fame. Because of #02545 documented history, full restoration and association with Mr. K and the Franklin Mint’s model - It has become a very desirable Collector item.

I suppose it could also be bedliner.

I'd just cut the pans out and clean up whatever is left on the edges using dry ice or heat and a scraper.

It looks like roof cement. 😁 I would use alcohol or lacquer thinner on a rag and wipe it to see if it stains the rag black. POR-15 shouldn't wipe off.