Jesse

iTrader: (4)

I'm porting a spare cylinder head from goaliemo's parts car before my SC build. I figure while I have the bare head I may as well do some measuring. Here's what I have so far:

Intake Valves: roughly 35.17mm
Exhaust Valves: roughly 30.9mm
Combustion Chamber size (in cc): 48-49cc
Intake port volume: roughly 155-160cc
Exhaust port volume: roughly 70-75cc between all 4 ports

Is there any other information you guys want while I have it here?

sandman

iTrader: (4)

intake valve is 35.17mm
exhaust valve is 30.09mm

Jesse

iTrader: (4)

Thanks. My caliper battery died so I had to use a ruler. Will update after this goddamn graduation crowd is gone.

yellowsupercharged06

iTrader: (3)

Hahaha got the job done with what he had... I like it.

Jesse

iTrader: (4)

Not gonna lie my biggest concern was information that wasn't available ANYWHERE that I searched, which was the intake/exhaust port size/volume/cc and the combustion chamber size in cc. Thankfully I have a ton of tools to measure that kind of thing. Also the valves on this head allowed me to measure the port sizes and combustion chambers without huge problems.

Jesse

iTrader: (4)

For what it's worth, Just removing the casting flash, smoothing the cast-foam look inside the ports, and knife-edging the dividers yielded me 180cc intake ports and 80cc exhaust ports. That's roughly 20-25cc increase in the intake ports and 10cc in the exhaust ports. That's huge for such a minimal amount of porting. I could go more but this is already knocking on SBC territory. I don't think such a small engine could benefit from much more porting. Now to mill the head and see where my combustion chambers end up. Hoping to reduce them by 3-4cc and bump my compression ratio by .5-.6 points.

fastow

Did you ever go any further with this