304 banana manifold carboned

[Noakesy]

I just started stripping my 304 so I can send the block off to be cleaned and I have noticed that the intake runners on the banana have carboned up quite a bit. The carbon seems to get heavier as I get towards that back end of the manifold does anyone know what might cause this?

[Not_An_Abba_Fan]

The combustion process. It's quite normal. You can clean it, but it will always carbon up again.

[Noakesy]

Yea I was expecting to see a bit in there but I wasn't expecting to see this variation in the amount of carbon. Like I said it gets progressively heavier towards the back of the manifold