Jump to content
Ultimate Subaru Message Board

what are the diameters of various subie carb barrels?


Recommended Posts

EA81 C/W 1bbl = 36.5mm

 

The 3 digit number in the model name of Hitachi carbs gives the throttle bores. The first two digits are the larger bore, and the third digit is the last digit of the smaller bore. You have to use common sense to fill in the missing digit for the smaller bore.

 

EA81 Hitachi carbs all have "306" in the name, thus 30mm & 26mm.

EA82 Hitachi carbs all have "328" in the name, thus 32mm & 28mm.

 

There are some Nissan or Isuzu trucks that used Hitachi carbs with "340" in the name, and are thus 34mm & 30mm. I looked at one of these in a junkyard once, and they have the proper mounting pattern to fit on a EA82 intake. The one I was looking at was not computer controlled either, and had very little emissions junk on it since it was on an older truck.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...