2.3 valve sizes

[Ggreen21]

I run a mini stock car out at Irwindale speedway, which we are required to run stock valve sizes. I currently have two different heads, an oval port and a D port. I would like to know the stock valve diameters for them, if they are the same or one head came with larger valves from the factory.

 

[Mikel89us]

All 2.3 heads to my knowledge had the same valve size. I can't remember the exact size, but most head shops can tell you, ill go check bo-ports site and update it.

And just fyi, oversize valves don't really help a stock head, we can't port them enough to make use of bigger valves.

 

[Mikel89us]

1.74 intake
1.50 exhaust