Topics Last Week
Showing topics, images, events and files posted in for the last 7 days.
- Past hour
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Fuel Pump Hammer Smack
Were they stuck with gelatinated gas or internal rust?
- Today
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The OG 240Z - Reanimation Project
Just before the trip, I replaced all the tires. Four corners, and the spare. I got them at Firestone, but what I put on was dictated more by "what was available near the size I wanted" than anything else. The original tire size was 175 SR 14, and the web says that back then, when the aspect ratio was not spelled out, it was 78%, So using that, the original tires were 175-78-14. The closest to that size I could find near me was 185-70-14's, which is a tiny bit smaller than the original size, but only about one percent different. Close enough considering the availability. I went to Firestone and got "Suredrive Touring A/S 185/70/14" on all four corners and the spare. Nothing special, but very close to the original size. And the date codes were from late 2024 which was a whole lot fresher than the tires that were on there before.
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Advice Needed for a Reliable Workshop Repair Manual
Is it for the 260 in your cars owned or is it a ZX as the TECH FORUM category you chose? Here's wiring for a 260. There's a lot of info in the RESOURCES category up top of the home page
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Float level advice, please.
Last time I messed with this, I tried to use off the shelf screws and I could not get enough mass packed into a small enough package. I've found that 4 grams is a good amount of mass to get the float to sit level at equilibrium, and the wood screw just didn't weigh enough. Here's a failed attempt to use a brass wood screw instead of making my own weights from scratch. Pic of a wood screw chucked up in the lathe, narrowing the head, The process of narrowing the head worked fine, but the amount of mass remaining wasn't enough. I ended up making another pair of weights from scratch. Here's a pic of what didn't work out:
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240z air fuel mixture adjustment
The RPMs should decease when lifting that piston, almost dying out. Lifting the piston disables that carb then you are running on the 3 cylinders the other carb feeds. That's what mine does anyhow. Try reaching in and lift the piston itself instead of pushing those pins down. Your needle height may be off from the rebuild with the needle height set screw? Remember raising and lowering is viewed from the bottom of the car. Turn the nuts towards the fender to lower the needles. Read the section on SETTING MIXTURE.
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240 front inner-fender mud flaps
- Yesterday
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left headlight bucket for 240
- Replacement glass for 280Z
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Madkaw is back ?
Glad you came to ZCON and gave me some inspiration on my future engine! I got a pic of our cars together and one of yours at the show Saturday. Hope to see you again at a future event!
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Let's show vintage racing pictures. I'll start.
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[2025] What Did You Do To/with Your Z Today?
Glad to be alive . I’m a lucky guy for sure . It’s fancy but it’s all business too:)
- Last week
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Round top SU carb piston binding
Here is the SU tuning kit mentioned in post above. I just checked on eBay and they are available for $40. The small aluminum fitting laying on top of the gray package is the one I was referring to.
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getting 1977 280z started
This is for you, not your car.🙂 Something I figured out after getting older and working on these cars. You can help your back when doing all that tedious engine bay stuff by simply running it up on a set of ramps or raising it up and using jack-stands to get the motor up so you're not bending over all day. Another thing I had learn the hard way was resting my elbows on the fenders would cause dents I ended popping out with a suction cup from HarborFreight. Cover the fenders with anything like towels or paint drop cloths using magnetic bowls that hold all the fasteners. I'm about to adjust the valves on mine. I use a set of Rhino ramps to get my lowered 240 up to, looks like about 38". Just a courtesy bit of advice you probably figured out way before I did and it really helps. Have fun!
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KW Suspension for Matthew’s 1973 Datsun 240Z
Very cool! I love my ZCG brake kit. The KW stuff is probably amazing, but I can't stand the purple and yellow:)
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1972 240z tachometer not reading nor working with MSD blast 2 coil. Any solutions?
You are right! Mechanic should get this engine running with pertronix ignitor module 1761, 1.5 coil and 1.5 ohm ballast.
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Different OEM exhaust manifold versions
Photos are of the original N33 exhaust manifold I removed from my 73. Replaced it with an earlier one when I went to round top carbs. I confirm you need a different downpipe. I was able to swap my 73 downpipe for an earlier one.
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Valve Stem Heights
Hi Site Been a while….not sure, but whatever adds .080 inches….if they are .040 inches, 2 would do. Don’t hesitate to call Eiji….tell him you’re my cousin and if wants to keep eating steak at our house, he needs to be nice! 🤪 He’ll sell you the right stuff.
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1973 Exhaust Downpipes?
Ok thanks but would you know the casting number on the OEM exhaust manifold please ?
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1977 280z ignition/fuel system "neutronics"
I believe he mentioned 10 plus years.
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saturday night music thread
I've been stuck on this album for a couple of weeks now. I'll put on something else and after that finishes I'll say to myself... Let's give John Hiatt - Walk On another play.
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1971 HLS30-14938 "Lily" build
I do, I ordered another from Nissan to replace mine. When I get back in town from Boston, I’ll post the p/n. Can’t remember if it was superseded.
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Modern Relay replacements for 280Z Fuel Pump Control Relay and Electronic Fuel Injection Relay?
I live in arizona... i bought it and it just arived in less than 24 hrs. fastest turn around for a relay i thought i would have to wait 1-2 months for.
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1973 240z Custom Wiring From Scratch
Thanks Matthew for a great write-up =) Here is my tiny contribution to it: You were wondering about the Thermal switch 22110-E8000 and stating that it's probably for the automatic model only. I found information which connects it also with the manual model, with the emission control device (EGR) to be more precise. It can also be found from the -73 wiring diagrams (both manual/auto). Please see pictures below: Keep up the good work!