how can i tell

[callum1]

hey all. searched and couldnt find.

how can i tell if my gze is bigport or smallport. see I'm in need of an intake manifold for turbs conv and I'm under the impression that if its bigport, ill need a bp manifold and vice versa. true?

so yea how can i tell. not sure of the car it came from.

[slide86]

small port should have the oil drain on the back of the head. I'm pretty sure it still applies on GZE

[callum1]

what will that look like? there is a bit of action going on out the back. not sure if its for oil or water though

[squish]

bigport = afm
smallport = map
can be changed etc.
maybe a compression test?

[Hen is a total nutcase]

By far the easiest way to tell is to take off the inlet manifold. Bigport ports are not evenly spaced (1 2 . . 3 4) while smallport ports are (1 2 3 4).

Or if you have an original wiring loom read the dates off any of the wires (they can be a bitch to find, but every wire should have a year printed on it somewhere).

Hen

[Tyrie]

I'm not 100% sure but I would have assumed you would be able to tell by comparing the runners. Here are the best pics I could find of a smallport and bigport inlet manifold...

[rthy]

take a picture of the manifold and show us

[biggo]

pull it apart?