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TR6 TR6 inlet valve dimensions

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I need some info on the intake side for the TR6. My car is in the shop - which is an hour away, so I can't get to it easily.

The chap who is building me a new manifold wants the following:
[ QUOTE ]

Intake valve Aspect ratio or throat size. (The smallest Area just below the seat.)


[/ QUOTE ]

I'm hoping someone here can help me out...
TIA, Alan
 
Not sure what is referred to here, but possibly the ratio between the area of the valve and the area of the port.
I think the accepted value for best performance is that the port should be about 80% of the valve area, but unless you are changing to a larger inlet valve why would the question come up?
I hope someone else can help.
Simon.
 
I'm having a custom manifold made.
He wants the #s for the calculations for airflow.
 
Throat (bowl)size just below the valve seats is 1 5/16" --early model head. Generally speaking unless you are enlarging the ports, valves and porting out the bowls its not going to matter what the throat size is in relation to the intake manifold. This is especially true with forced induction like you are going with. The main thing is that the intake runners match the intake ports.
 
Thanks ALLAN, but I have a late model head. I'm not sure if the size is the same and they just changed the spacing, or if they changed the valve size as well. I think it was just the spacing, but of course I'd like to be sure...
 
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