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Size of intake and exhaust ports 

 

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 Post subject: Size of intake and exhaust ports
Posted: Sun Mar 08, 2009 8:13 pm 
Getting Side Ways
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Just wanting to no what the standard ef port sizes are for the exhaust size and also the inlet side

thanks

 

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 Post subject: Re: Size of intake and exhaust ports
Posted: Sun Mar 08, 2009 9:47 pm 
Getting Side Ways
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measured at what point?

 

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 Post subject: Re: Size of intake and exhaust ports
Posted: Mon Mar 09, 2009 7:39 pm 
Fordmods Junkie
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anyone know the stock intake and exhaust valve diamiter in inches? i cant find this info anywhere

for a "91AA" head if possible

 

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 Post subject: Re: Size of intake and exhaust ports
Posted: Mon Mar 09, 2009 10:36 pm 
Getting Side Ways
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rushed wrote:
anyone know the stock intake and exhaust valve diamiter in inches? i cant find this info anywhere

for a "91AA" head if possible


If 91AA is for an EBII-ED & valve sizes are 47mm IN & 39mm EX, then the closest size for the inlet valve is 2 27/32 & for exhaust, 2 17/32. With a metric to fraction converter, the imperial figures are about .1mm under the metric size.

There may not be an imperial equivalent if they're made for Ford in Australia. Hope this helps.

 

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