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Home > Help Needed / General Tech Chat > Difference in ports between Metro Turbo and MG Metro heads

NDT

21 Posts
Member #: 11884
Member

Hello all,
Does anyone know what the difference is?
I know the turbo has standard size inlet valves and the MG has the bigger ones, but any difference in the actual ports?
thanks for the help!
Nick


TurboDave16V
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10964 Posts
Member #: 17
***16***

SouthPark, Colorado

No, zero difference between ports of the same castings.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Who remembers this first time around: https://www.youtube.com/watch?v=JF0a5aoEGsw


NDT

21 Posts
Member #: 11884
Member

great - thanks Dave


Turbo Phil

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4577 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

Thereís a difference in the throats just below the seat. The big valve head has a choke/Venturi cut just below the seat improving airflow. Itís subtle, but itís there.
The smaller valve heads simply come off the seat straight into the port.

Phil.

WWW.TURBO-MINI.COM


TurboDave16V
Forum Mod

10964 Posts
Member #: 17
***16***

SouthPark, Colorado


Phil, was this a casting difference??? Iíve personally never noticed it before.

On 21st Jul, 2021 Turbo Phil said:
Thereís a difference in the throats just below the seat. The big valve head has a choke/Venturi cut just below the seat improving airflow. Itís subtle, but itís there.
The smaller valve heads simply come off the seat straight into the port.

Phil.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Who remembers this first time around: https://www.youtube.com/watch?v=JF0a5aoEGsw


Mr Joshua

2337 Posts
Member #: 1954
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Luton Bedfordshire

Doesn't the bible by Dave V. Cover this subject. I am sure somewhere I have read that the MG head castings are different in the intakes, flowing better. The article went if memory serves said that through the different levels of modification the Mg head was only truly beaten for flow performance by a fully worked head when tested with the same same valve lift.

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