madkaw

What have you done with valve seat and bowl areas?

And where’s the damn pics ?

My thoughts would be if I spent the money for forged pistons I would take full advantage of their durability with respect to rpms and CR. I would go with as big of a cam as possible and run 11:1+ , but 91 octane you are probably in a safe region. With MS3- which is what I run- with full control of spark you can push the envelope with timing and dial it in more safely than a dizzy, but you probably already know that . As far as porting, my MN47 Is also very similar to to the 79&90 heads, but unsure of the port structure. I could only go 35mm before getting the walls to thin. This is 35mm way down in the hole . So just matching ports of intake and head you might not see any issues

Flat tops have any reliefs? So cam is 480 lift and what duration? I would have gone higher on the CR with what you have. Becareful how deep you go on that port match. I haven’t dug into a 79 , but I know my MN47 would not open that big

Well after 25 years of sitting the 77 went down the road for a little spin. Apples and oranges compared to my Z - lol. Not fair comparison I know . Shocks are bad - from just sitting for 25 years and only 30 K miles - disappointing. Brakes were a bit soggy so I might need to purge more fluid from it . Not a puff of smoke anywhere- except a bit of burning of rats nests between the heat shield and intake - Transmisson worked well for an automatic. Engine seemed a bit doggy - even for stock. It ran smoothly with no hicups or belching , but nearly as stout as the 73 Auto I did last year( with a timing chain ready to fall off). Love to have a wideband on this motor. I pretty sure the AFM has been hacked into, so who knows where it’s at. Need to go back thru the EFI bible again and do more checks. Seems to be loading up a bit at idle, but once warmed up she idles rock solid. Something’s a miss on the dizzy too, maxed out advanced to just get the right numbers . Hopefully I just got the shaft in wrong and not a slipped pulley. Turn signals stopped working though worked fine in the garage? I SWEAR the AC is putting out cool air- how can that be!! Interior is going in . Carpet kit is a jig saw puzzle with two pieces that don’t fit - but I’ll adjust that. Ordered a full dash cover to complete a very complete interior. Everything works down to the glove box light . Owner is wondering what he got into as the bills escalate. Most Z owners would be over the moon every time they looked at this chassis. I’m betting he will sell it because he’s not a true Datsun enthusiast, but someone will benefit from that. I did find some rust on the passenger floor. Floors were getting wet from leaking water somewhere. The window wasn’t even all the way up when I got it. It was all surface rust- no pitting .

Post up your MRI’s -lol Just time to get it over with. It’s affecting my play time with the Z

Getting c5-c7 replaced in my neck . Hopefully enough time for me to recoup to drive the 6+ hours . Won’t get much done on car before hand . Might have to pay someone to wax it -lol, that would be weird ! Been too busy trying to finish this 280z to do anything on mine . Really wanted my L28 in there , but alas....

Anyone have some success stories for speaker sizes that fit well in the stock holes in a 77? Looks like there might be depth limitations . I also imagine no speaker lines up as far as bolt pattern , but maybe get lucky. This Reno car I’m doing has a vintage Sansui stereo that I’m going to try and utilize , but the speakers are shot. Don’t even need anything great , just something that fits.

Shiny parts!!

Should be okay. The fuel lines ride high in the tunnel, so doubt you’ll be cutting in that area . This is if you are only replacing rails that attach to floor

I’d say you have a tuning issue. Though gearing helps the smaller 2.4 , there should be no stumble and still should be able to take off in 2nd gear if need be. I would recheck timing (ignition) . I’d also make sure cam timing was done correctly . Everything including fuel should be checked . Something doesn’t seem right

There are some things to consider . Most cam grinds of performance cams already put some advance into the grind itself. Head shaving and chain stretch . If you had a straight head and didn’t have to shave a bunch to get it it right , or you chain is new , advancing the cam timing might not get expected results. Example for me was that my head and block were shaved around .050 total and no shims , so advancing cam 8 degrees was really needed. Cliffs experience sounds about right for advancing timing , more power low end.

I’d venture to say all the early dished pistons BLOCKS are the same . Performance wise I would find a later flat top piston block. Cylinder head. N42 and N47 are the same except for the exhaust ports . The 42 lends itself to more porting advantages , but for just swapping parts it’s a wash

Acquired - thanks guys

Still not enough info

I know what the slit is for- just remembered.

They look good. Not next to the car right now and trying to picture what the slit is for on the vinyl

Let me know

Just looking for the vinyl that goes over the strut towers, do not need any other vinyl. Must be in good shape. Thanks

So this model didn’t have a Interior Tail Light Panel . The Masonite covers everything . Looks new under the carpet

Following ! My son wants to go too, but he is hoping to represent USA in the olympics. I asked him if he would mind if I wondered off to find some Z hangouts -lol. Fortunetly they understand me

I’m putting mine up for sale - 45k gets it guys!

Needs a few more things , but soon. Ive been getting rid of all the fire hazards(nests) before things get too hot. More no rust pics!

Jim came over to help bleed brakes. He was jealous of how well the engine sounded . 30k miles - so it’s not broke in yet

Well I didn’t take the dizzy apart, but cleaned it the best I could by spraying it down . New/used fuel pump pressure checked good. FIRE IN THE HOLE!! This engine starts better than my Megasquirt motor! Sounds smooth and healthy . Can’t wait to drive it around.