can anyone tell me what the size of the exhaust port is in the stock head, and hopefully the sizes of some after market heads. Im going to build a header, and would like to know these sizes before i start on it. And i do plan on getting an after market head eventually, so just need a refernce point, i dont need to know the manufacturer of the head, or you could pm me with the size to prevent and theft of trade secrets or anything like that, hahah. Thanks alot

Beecher

 

I have no idea if this is right, but for some reason, 2.5'' is poping in my head.

Can any one confirm this?

 

2.5 is tha diameter size of an exhaust pipe/system, wat he needs is actual size of tha exhaust port on a stock head...i have this info sum where i'll look to make sure b4 i post wat i think it is.

 

here's an excerpt from the following post
http://www.mini2.com/forum/engine-dr...surements.html


Head:
intake ports: 1.675" x .85"
exhaust ports: 1.348" x .8"
intake valve: 30.2mm (1.189"), throat below seat: 25.9mm (1.02")
exhaust valve: 23.3mm (.918"), throat below seat: 18.8mm (.74")
rocker ratio: intake 1.65:1; exhaust 1.43:1

 

wow thank, the rest of that info will come in very handy as well. Thank you very much

Beecher