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synchronizing carbs with or without air filter house?

11K views 19 replies 8 participants last post by  Bill  
Maybe I'm missing something here, but if you're using a syncrhometer you pretty much have to do it without the airbox. But this shouldn't make any difference: when you sync carbs, you're just making sure they are balanced from carb to carb and are pulling the same volume. When you put the airbox on the total flow may change but it won't change the balance between the carbs appreciably.
 
The airbox keeps the carbs in proper alignment while the support rod maintains them at the correct height. Both of these MUST be installed when synchronizing the carbs.
Okay, that must've been what I was missing about his car, then. On the TR7 and the Weber'd Giulia I had to take the stuff off the front of the carbs...no other way to get to the carb openings to sync them.

I've probably got the same synchrometer 180OUT has: the gray german one with a curved attachment that you just stick into the carb. Agree that by ear is probably good enough in most cases...hell, the TR7 would run halfway decent on one carb! But I was trying to get the **** thing to pass CA smog, so every little bit helped.

Anyway, the synchrometer sure is easy to use and it's precision appeals to my engineering side. Buy it once, use it forever I always say.