Matching Inlets - what to use as a guide?

[Si]

Hi

I have aquired an inlet mani off of a very kind northern friend of mine with a broken tb'd 172

I'm looking at matching them all i need to know is what to use as a guide? I've read that holes in the gasket are larger than required so they can only be used as a rough guide, would that do?

Sorry i haven't searched but i'm in a hurry as it's lunch time. lol.

Cheers.

 

[Tucker]

Could you not put engineer's blue on the head and machine out the mani with a dremel?

Plenum the same?

 

[Si]

iirc the plenum doesn't need doing?

also i'm not sure if blueing it up would be clear enough. wouldn't transfer that well surely?

 

[Si]

If i were to use a gasket as a guide does anyone know roughly how much bigger the orifices in the gasket are in comparison to the inlets in the mani?

 

[FeelX]

Inlet ports are oval shaped 50 x 30 mm IIRC.

 

[Chrisjk]

Some pics in here http://www.jam-sport.co.uk/clioinlet.asp appears to be 2-3mm taken off. The plenum needs doing as well really to get the most benefit.

 

[mark123]

On mine the head matched the gasket. Take it apart and have a look.

 

[Si]

Ok cheers for help guys.

 

[Hutchie]

i have matched head and inlet to gasket :S