siteunseen

If you have a ZX dizzy the cap is larger as well as the plug gap. Does it utilize the E12-80? Okay I see you have the OE dizzy. Sorry.

That thing is old and rounded out. It feels like a worn 150 maybe? And it's an air powered die/dye? Grinder. The dremel cut it fine but made a bunch of thin cuts. That flapper will cut half an inch if you're not careful. I was very happy with my reliefs. I may have drank 4 or 5 beers afterwords. This stuff makes me nervous!

I first thought about a parade.

Are you putting your cursor on the picture, hold down the "S" key and right clicking it? That's a trick I read about google shortcuts. It works good most of the time for me. Go to the "original boobs thread" and try it.

Look at Dizeased's in post #3. Maybe he'll reply and say what he used? http://www.classiczcars.com/topic/51171-keep-original-air-port-exhaust-manifold-or-who-cares/#entry466421

There's some on e-bay, zcardepot. http://www.ebay.com/itm/Datsun-510-240Z-260Z-280Z-280ZX-70-83-Mag-Wheel-Lug-Nut-OEM-Genuine-Nissan-/221724557366?hash=item339fd04036&vxp=mtr

Good news, you guys are right, the machinist said the same thing. My heart fell into my shoes when I saw that pit. It made me sick to my stomach then I got to drinking away the blues and got sick to my head. He has everything now except a piston, he said he needed one for measuring a few different things. My short valve seals are on the UPS truck for delivery today so tomorrow he'll get those and a piston. All is well in my world for a few minutes. Oh yeah, I forgot to say what he said about the .190" lash pads that came with the cam. He said they send the thickest needed and that he has a way of milling the others down if they need to be shorter.

Yes I did use the flapper wheel. I tried making the exhaust a little bigger than the intake sides, the intakes barely scratch the bore. I also went down at the same angle as the valves, toward the spark plug holes. When I had the block outside I noticed a small hole in the cylinder wall. Don't have a clue as to how it got there or what to do about it. Taking everything to the machinist today. He'll tell me what can be done or not done. May end up using the .030" over F54 after all. ITM flat tops are only $200, apparently. Anyway what do y'all think? It had good compression numbers and the walls are beautiful except for this little pimple.

My '79 ZX dizzy uses a different coil, 1.5 OHMS, and hotter plugs than what my '77 had before the swap. I was wondering if those 2 things and the lack of air up there would cause an incomplete burn leading to all the soot? Maybe at warm up when the idle drops they are fouling then when you run it up they burn off? I had to throw another stick in your spokes, there's not many left.

More like a common sense blowing out the soot. A "poor man's tune up" is done on the side of the road to get home.

Ha! You get the all time "atta boy". I love seeing things done right like you have, keeps me trying for the best with my funds.

Very fast!

Put a vacuum gauge on it. They're very helpful diagnosing problems. http://atlanticz.ca/zclub/techtips/vacuum/

Maybe he's marrying a big ol' fatty and needs more space to get the door closed?

I think it's the same snowman before he got roasted. Kill them then burn all the evidence.

Welp I went ahead and took the dive. I can always get more off but I think this will be conservative enough until the machinist gets done and mocks it up. Criticism is more than welcome, atta boys are better.

That's what they are then, if the '73 had bigger cap bolts. The '73s weigh about 19 grams more. Wouldn't I want less weight at the crank? That's why I'm grinding the caps like Nissan did. Man am I nervous about cutting the OE block for valve reliefs. I did all the holes on the spare block and will post pictures of what I did and let y'all tell me which grind looks best and then try to replicate that onto the OE block. I'm trying to get some outside stuff done to my property before the pollen starts. That stuff kills me now that I've gotten older. We only get about 2 to 3 weeks of spring before the pollen then it gets hot and humid. But I could be snowed in. ::

Thank you Mr Beck. Makes perfect sense now. I've only bought new Exmark mowers, never a brand new car. Maybe someday?

Well I'll be damned. You are absolutely right. Cam numbers and lobe separation are engraved on the sprocket end of mine. Learned something today.

Dye grinder on those same flat spots on the caps.

Those wrist pins don't come out as easy a my boat motors did. Deep socket and a short sledge hammer would drive them out but not these Datsuns.

Tabco. https://tabcoparts.com/1234-41577.html

We call them "shake and bake" around here and that isn't good but maybe they do better work in Redondo Beach.

Finally back working on the motor. I hate colds and cold weather. Weighed my pistons today and the lightest is 384.5 grams which happens to be #1. Number two weighs the most, 390.7g. I'll get them all the same tomorrow. I noticed how Nissan balanced them, ground a flat spot on the rod cap, so I'll do the same. These are different from another set of 2.4s. They're lighter and have smaller rod bolts. In the picture you can see the 6 I'm using and one off to the right that's from a different motor. Also have the rear main seal from Nissan's part number and price, $31 out the door, but I'll have to reuse my nails. Anyway glad to be greasy again, times a wastin'.