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I put a few gallons a year in my '72, it's 93 with 10% ethanol. To be honest the most problems I've read on here is a result of low fuel chambers. Get the floats right then you can adjust the carbs & timing correct. I tried and tried for a month then went to basics like my Dad taught me, now it's rock solid.

I remember Fastwoman talking about Goodyear EZ coils for bending rubber hose. That may be in the links Namerow already posted? I'm using my phone and it's a pain trying to type.

I drove one backwards to get home. Had to replace the tranny. The fluid flow is next to nothing going backwards.

I found this early this morning looking for a paint brush. The return is the small hole and as I understand it's the restriction that makes up the fuel pressure for our carbs.

I like the p90 better after comparing them side by side plus better designed chamber than the e31. I'm not liking it too much after I unshrouded them for the bigger vales. The runners in the p90 are better from what I've read, straighter better flow. P90 is the dirtier one.

Paint store and 88 two bedroom apartments in 11 buildings I'm stuck with "managing". Paint mixing, rental property, cylinder head repair, manicures and income taxes done here. Taxidermy work is seasonal.

My '72 has what I call wire arms. 2 wires about the same as clothes hanger size. 280 has a solid looking arm.

I'll know tomorrow. I have the e31, how to modify book for measurements, my dial calipers for measurements and my Sony high res camera in my trunk to take to the paint store. Feed it all on here and see what responses/ideas I get.

Check out this spreadsheet walter moore put together. Distributor advance curves.xls

Something else I'm considering. Cam on top of flat piston block. Keep the EFI with my potentiometer fuel enrichment tweak. I can richen it up so much it will go dead. Wonder how that will work with the .460 cam?

I bought a .460 Schneider cam kit in 2015 to put in my e31 that has the new bigger valves. I tried shrouding the valves and smoothing the intake runners. Am not happy with what I did so it got shelved. Now I found this p90 that is a better version of the e31. Peanut shaped combustion chambers are newer and supposedly better. I'll post as many measurements that I can between the two asap and let you all help me decide what head to put $850 cam kit in. Running a ben moore paint store by myself and it's feast or famine there for 10 hours a day. So this gives me something to do during slow times which seem less now that I'm the paint king #1. Anyhow I'm getting my fingernails greasy again which is nice and raises my Datsun blood pressure again after a 5 year hiatus. More tomorrow...

So far so good. Now I know why it was so clean and made that slight pop noise when the valves came out. Dover cylinder head did a refresh sometime in it's past. The heat sensor was on the rear.

I feels soft and squishy like assembly lube. I'm thinking the p.o had the good sense to coat it real good before storage.

#10

Definitely glue with fuel resistant black rtv.

Trade with you? That's cool as hell right there.

Just realized your pic is a front carb. Mine are the rear. Things look a lot different.

Take the screws completely out then with the lid still flat on the chamber turn it 90 degrees in the opposite direction of the vent bung. Then turn it just enough to get that indention before the screw hole under the nub under the dome. Once you figure it out it's easy. An "ah ha!" moment. Turned Indention lined up lift up when you can whala

I'm going to try and take pictures of this paper weight as I make it lighter. Bought it from a guy that works at a scrapyard. $20 dollar scrap price but an old friend that works there knew what a Datsun 280ZX was and gave him $25. Called me and now it's my toy for the next month or so. With you guys asking about it I'll get it done. Pictures so far.

What coil do you have?

I bought an aftermarket adjustable fpr when I put my aluminum fuel rail on, it was crap. Ended up using the 1978 OE fpr. One in, one out plus the return and vacuum nipple.

"Home is where the head is" I'm going to take it to my job and disassemble it when I can. Bag and tag all the parts then bead blast it. In the meantime I can read up on the mod to figure out what to do next. Hopefully I can use this one instead of the 53 year old E31 I was planning on putting that cam kit on. Most likely use up all the parts I've collected to make a higher compression motor then drop it in the 280. I'm not touching that 240 unless I have to, fenders already have elbow dents all over the tops. @Jeff G 78 I found this for less than shipping that P79! $475 less than the ZX motor. Does this sound about right @Diseazd? - shaving the head .080" - installing 1975-78 L28 valves which have .080" longer stems - shimming up the cam towers .080" - shimming up the spring bases by .080

Low battery maybe? Could be a vacuum line fell off? Check your vacuum. Hope it's nothing! Good luck

Watch your inbox. I remember you use the Z valves in the p79 heads.