Does anyone have a 1.8 SOHC head that's off the car? I'd like a measurement of the intake port diameter if so, please. Thanks!


• 86 Skyhawk wagon : 2.0SOHC swap, Megasquirt, 20SEH cam
• 93 Sunbird sedan : 2.0SOHC, Microsquirt, ported head, 10:1
• 88 Sunbird coupe : 2.0SOHC, turbo project car, giant tires

I have one in the attic. I will have to look if nobody beats me to it.

Thanks, no rush if it's buried up there!


• 86 Skyhawk wagon : 2.0SOHC swap, Megasquirt, 20SEH cam
• 93 Sunbird sedan : 2.0SOHC, Microsquirt, ported head, 10:1
• 88 Sunbird coupe : 2.0SOHC, turbo project car, giant tires

Sorry to bug you, but had a chance to dig it out yet?


• 86 Skyhawk wagon : 2.0SOHC swap, Megasquirt, 20SEH cam
• 93 Sunbird sedan : 2.0SOHC, Microsquirt, ported head, 10:1
• 88 Sunbird coupe : 2.0SOHC, turbo project car, giant tires

Here's the intake valve dimensions:

O Engine CODE; OHC; PONTIAC,HEAD DIA-1.61 LENGTH-4.19

Hope that helps.

I'm actually just looking for the diameter of the intake port at the beginning/face of the head where the intake mounts. Thank you, though!


• 86 Skyhawk wagon : 2.0SOHC swap, Megasquirt, 20SEH cam
• 93 Sunbird sedan : 2.0SOHC, Microsquirt, ported head, 10:1
• 88 Sunbird coupe : 2.0SOHC, turbo project car, giant tires

I measured the inside diameter and it is 1.4063 inches or 35.72mm. I hope that helps..

Now is that an average of all four ports, or just one, and how sure are you of the accuracy of the 3 tenths ?

...just kidding, thank you for taking the time to measure that for me, I appreciate it!


• 86 Skyhawk wagon : 2.0SOHC swap, Megasquirt, 20SEH cam
• 93 Sunbird sedan : 2.0SOHC, Microsquirt, ported head, 10:1
• 88 Sunbird coupe : 2.0SOHC, turbo project car, giant tires

I measured the 2 center ports With a metal tape twice in inches and converted to mm. I did not use a micrometer.