Help with confusing G13 timing marks

[3VILC]

So from what I can make out, the sets of timing marks on the cam pulley are for twincam engines. The only single cam image I could find was for a G16A 16v which says use E keyway and E timing mark, is this the same on all single cams I assume?? If so then that's why I can't get this engine to run. The keyway is in the E slot but its timed at the I mark (possibly last person got confused as its in the same place as where the E keyway letter is stamped).
If this is the case would it even run at all because it does but like sh##e. Compression is low on 3 and 4 so I was about to strip the head down when I found this timing issue. At the TDC it is currently set to no2 intake is open and no3 exhaust is open don't know if that's correct or not?
If someone could offer any info hopefully I've found my problem without dealing with a head gasket or the dreaded cracked head or block haha

[Crash bandicoot]

Twin cam engines.....with the number one cylinder at top dead center the intake cam lobe should be 270 degrees(0 degrees being the lobe pointing down depressing the valve to the full open position.) if you are standing infront of the engine.

then when you turn the engine the number one cylinder will start to travel downward and the intake cam lobe will start to depress the valve down to let air in

single cam with rocker arms
the cam is should be at 90 degrees from the aforementioned 0 degree position as it now lifts the rocker arm up forcing the other side down onto the valve.

[Terry]

Yep, you time the G16A/B engines with the "E" - I timed with the "I" and it wouldn't fire at all....
This guy has a lot of good info, a bit hard to follow but worth the info, if you haven't already been there: http://www.fixkick.com/t-belt/16-fast-belt-install.html

[3VILC]

Thanks terry already read that article that's the one that got me thinking. I assume it may be possible if the dizzy was also out? I know I successfully? ran and drove an old mitsi to the workshop with the cam 180 out. So I definitely should be ignoring all the 'I' marks. Its definitely set up wring then. I'll try changing it to correcting and the realign the dizzy to #4 (strange setup that is too haha) and see how it runs. Tho I suppose if the cam was that far out it may also have done the head gasket

[3VILC]

Sorry for all the novels but you get a lot of time to ponder these things when your on the road all night
So a bit of background, what we have is a G16A block with a G13A head, I know it achieves nothing and has tiny valves but as I started with a bare engine bay it was cheap and gave me all the extra bits I needed including a spare gearbox and the G16 to SJ413 adapter kit. Brought as not running so hopefully a gamble I can fix.
Replaced carb as that was stuffed, unable to tune or idle below about 1200rpm and running generally crap still
Replaced all intake gaskets as they were all reused and leaking. Still not much better.
Compression check, 150 150 70 70, uhoh its done a head or block oh well pull the head and assess the damage then got to where I am now. The cam appears to be located in the E keyway, but timed to the I timing notch.
I assume as these are timed with #4 firing when the timing marks are aligned then we should set IG timing with the timing light on lead 4 instead of the usual 1. I got spot on 10deg, with the light on lead #1!
I also assume that if its the standard 1342 firing order, or really 4213 from TDC, then number 4 valves should be closed, number 2 intake should be just closed, number 1 should be just opening intake, and number 3 should be just opening exhaust, which doesn't appear to be the valves I wrote were open earlier
I will check the came lobe positions in more detail and any other suggestions that pop up when I wake up this arvo and report back

[3VILC]

Well the cam timing seems correct, pulled the cam bolt to check and the keyway is actually in the I slot, both slots are actually in the same line as their respective timing marks so it doesn't make any difference which one you use as long as you time to the same mark as the keyway you use. So I guess its back to pulling the head to investigate further. Doh!