Thx for your comments Wes, they are really appreciated. I’m pretty sure that the GA16DE and the GA16DS have the same connecting rods so maybe that would be the safe limit. The thing is that I’m using stock valves and valve springs and they seem to work well for those revs. I haven’t had any valve problems yet.
Why have I let it rev that high on more than one occasion? Cause even at 8000 rpms (sometimes a little bit more), on 1st, 2nd and 3rd gear at the ¼ mile the car seems to respond well.
And I’m starting to suspect that those revs are not healthy for my engine

, so I would like to know the reason why only 7300 rpms are safe, why not more??, can I use forged internals??…. or based or your experience what would you recommend?