Nah, it was just an experiment. Dished pistons and L28 77 block. No valve-piston clearance problems and 260z cam.... Ghetto as I said.

Compression is ~10.3 with the Felpro gasket.

BTW you can type your own values in the green boxes here (rather than just pull down on the left) to see what frankensteins you can build:

Z-Engine Calculator

Looking at initial timing and advance in FSM's and engine manuals

1970 17 @ 650 _6.0 mech 5.5 vac and 5 @ 750 12.0 mech 9.0 vac

1971 17 @ 650 _6.0 mech 5.5 vac and 5 @ 750 12.0 mech 9.0 vac

1972 17 @ 650 _6.0 mech 5.5 vac

1973 _5 @ 750 12.0 mech 7.0 vac

1974 _8 @ 750 13.0 mech 6.0 vac

1975 13 @ 800 10.0 mech 7.5 vac

1976 13 @ 800 10.0 mech 7.5 vac

1977 10 @ 800 _8.5 mech 9.0 vac

1978 10 @ 800 _8.5 mech 9.0 vac

1982 _8 @ 800 _8.5 mech 15.0 vac

Edited August 16, 201311 yr by Blue

Those 71 numbers are for the non emissions cars Blue, as you know the 71 US emissions dizzy equipped ran 5 degrees initial advance.

From the above (assuming manifold vacuum is used):

71 timing at idle is 17 +11 = 28

71 timing at WOT is 17 + 12 = 29

78 timing at idle is 10 + 18 = 28

78 timing at wOT is 10 + 19 = 29

Those 71 numbers are for the non emissions cars Blue, as you know the 71 US emissions dizzy equipped ran 5 degrees initial advance.

Yup, that is shown beside it.

Now I don;t feel bad with 20 degrees at idle with no vac on L24 with triple webers. It is less than stock. I also get 37 at WOT using the ZX distributor.

I have scheduled some dyno time on Friday morning to see what my car puts down. I will bring some jets and a timing light with me! Should be fun, but I am dealing with a shop full of Brotatoes who only work on LSX engines and Vipers.

Out of curiosity what are your reservations?

... ?

Yup, that is shown beside it.

Now I don;t feel bad with 20 degrees at idle with no vac on L24 with triple webers. It is less than stock. I also get 37 at WOT using the ZX distributor.

Sounds like you running the same exact set up as I .

No go on dyno day fellahs, Had to pull kid duty on friday. Wife got called into work and I was playing with my little one. I will have to reschedule...

Bummer.. but me and my 6 month old had a great day!

A 1971 is always a 1971 but a 6 month old is only 6 months old once.

That was darn near poetic buddy,

Well said!

Amen,

My oldest can look me in the eye. I am 6'5".. and my baby just turned nine. That is probably why my restorations take me so long. There just seem to be other things that out rank them...

Charles