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73str86

Finally got one...now to make it mine: 1973 240z Refresh / Personalisation

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Some updates:

- I have another failing mechanical fuel pump. $16 cast unit from Amazon. 

- I picked up a two owner early 260z from NM to resell (yellow). She was purring like a kitten within an hour of getting home.

- I stumbled upon a "rust free" 72 two owner California car (white).  Cleanest underside I've ever seen. My 73 may go back to stock and be sold in order to keep this one. 

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Edited by 73str86
Update

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On 3/1/2017 at 8:48 AM, SteveJ said:

Moving out west has been good for you Z wise, hasn't it?

They pop up fairly frequently. Not a big following here. Most bodies are very clean or very ratty, one or the other.

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I've been chasing a fuel starvation problem both at starting and WOT. I suspect it's vapor lock a result of 80 degree temps at altitude. It's time to put some heat resistant tape back on the fuel rail.

Edited by 73str86

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I've been chasing a fuel starvation myself at WOT. It showed up before my engine swap, but I was able to make the carburetors richer to compensate. Now that I have a 2.8 with higher compression, I have the SUs as rich as I can reasonably make them. My fuel pressure is low, though.

You may want to check fuel pressure to verify whether or not that could be contributing to your problem.

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I do now believe it is vapor lock due to the elevation and recent temps in the high seventies. I triple wrapped my factory fuel rail with Thermo-Tec this morning and switched spark plugs to match my E12-80 dizzy. My recent plugs were a perfect brown shade. I was very happy with their appearance.

I decided to take her up Pikes Peak last week. What a blast. The 15,000+ foot summit was closed due to weather, but I made it up to around 13,500 feet. I hope you enjoy the photos.

I am very excited to be getting a baseline dyno tune for my engine this week. $80 for three runs. My plan is go with run 1 as-is. On run 2 I'd like to crank up the timing and see the results. And following that I'm considering turning the mixture nuts an extra 1/2 to 1 full turn richer for the 3rd run to see if she wants more fuel. Thoughts?

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My only work to be done before the dyno session is to replace some heater hose bypass caps that are starting to show their age. Unless you folks have any other recommendations?

WORK TO BE DONE IN THE NEXT COUPLE MONTHS:

Install retro-spec type 1 air dam

Install Les' 432 rear spoiler

Rebuild/refinish NISMO 44s

Electric fuel pump install

Seats?

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 It's been theorized that wrapping the factory fuel line will aggravate the problem by trapping heat in the metal lines that may be coming from the mounting points on the engine. My own experience with SU's at higher elevation was a slight miss until I leaned them out 1/2 turn. Let us know what you find.

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In my case, further experimenting showed heat soak issues with some pretty good temperatures between the carburetors that I believe is due to the cutout on the heat shield for the exhaust manifold. I'm going to construct my own heat shield this week to try to combat the issue.

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73STR86...a couple of points: First, there are a lot more 240Zs than you might think here along the front range, and there is a Denver based group called zroad which was formed to combine the 311 roadsters and the 240/260/280 Zs, also there is a Northern Colorado Z Car Club of which I am a member. Second, I had my Hitachis redone by ZTherapy shortly after  I got my car in 2005. I explained to Steve that I lived at 5,000 feet and that a lot of my driving would be at a higher altitude than that. He put in 100 nozzles and N27 needles. FWIW I have driven over Independence Pass, Loveland Pass, Red Mountain Pass, Berthoud Pass, and Trailridge Road with no problems at all. I have since replaced the original 2.4 litre and put the carbs on a 280 F54 block with an N42 head (10-1 compression) and a stage 2 cam and a header. The car runs like a striped-arse ape. Plugs are NGK BP6ES. Distributor is a ZX w/ the 12-80 module. The only issue is a slight popping on deceleration which I can live with. No heat soak issues. Hope this helps. If you need more info PM me.

Cheers, Mike

Edited by Pop's Z

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Beautiful photos. I was in the area once and tried to make it to the top of Pike's Peak in a rental car. It was raining at the bottom, and the ranger stopped us about 3/4 of the way to the top because it was blizzard conditions and road was closed because the snow plow slid off the side of the road. Something about the plow was trying to clear the avalanche?

The thing was... They had just closed the road about a half hour before, and those who were already at the top were stuck there. Nobody up, and nobody down!

I was with SWMBO, and I cannot imagine what would have happened if we were some of those stuck at the top... I'd still be hearing about it! She was already nervous about the roads and wanted to turn around. I wanted to get to the top and pressed on. If we would gotten stuck at the top, it would not have been pretty!  LOL

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Updates:

Installed Retro spec type 1 air dam

Installed early 240z front bumper

------------------------------------------------------------------------------------------------------------------

To do:

Install Z Story header/exhaust

NISMO Mikuni 44 swap (Harada intake kit, Kameari fuel rail)

 

 

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Edited by 73str86

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After much disappointment, for an unknown reason, the ZStory  header/exhaust did not fit my car so I returned it for a refund. There was no clearance at the trans crossmember and a header primary was touching my steering rod. There is much debate about this on Facebook group DPAN, whether my car is bent, the welder made a mistake, etc.

 

I got a refund and will be installing the Fujitsubo system soon. So far everything fits like a glove, plenty of space around the header. I'll upload photos when the install is finished.

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It's been a while. Fujitsubo is a work of art. I can't wait to hear the whole twin pipe system. A freshly vapor blasted JDM valve cover will be hydro dipped in black carbon fiber.

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I ended up selling my completely rebuilt (by Eiji at Datsun Spirit) "NISMO" 44s also known as the Type 4. I instantly regretted it, and two weeks later bought these Type 3 Datsun Competition versions.

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2 hours ago, 73str86 said:

It's been a while. Fujitsubo is a work of art. I can't wait to hear the whole twin pipe system. A freshly vapor blasted JDM valve cover will be hydro dipped in black carbon fiber.

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They both look great.  Lovely welds on the exhaust.

 

Please don't dip the rocker cover, just leave it as it is :)

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Did you go for the newer version of the exhaust, its suppose to make a chunk more power and fit closer to the car.

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8 hours ago, Jason240z said:

Did you go for the newer version of the exhaust, its suppose to make a chunk more power and fit closer to the car.

It's the older version. The resonator sits a couple inches lower than the floor boards. Shouldn't be a problem unless the car is slammed. I just have some Vogtland springs and Illuminas.

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12 hours ago, 73str86 said:

It's the older version. The resonator sits a couple inches lower than the floor boards. Shouldn't be a problem unless the car is slammed. I just have some Vogtland springs and Illuminas.

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Did your importer offer the newer one?  I'm trying to work out the design changes that result in the power bump v's the older one.

 

Looks good.

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