ramair_bryan

Non elec carb.
But if your familiar with a ecm driven q-jet like our 81,
It's mixture solenoid fits in this spot in the carb. (Try to picture it).
Now this non computer controlled Q-jet has a pod with a metering rod sticking down into a jet in the floor of the carb in this spot.
What the heck is it?
Looks alien.
Should I kill it?

Just kidding........
What is it.

Shark Racer

Is this an 80's truck carb?

Sounds like a dual capacity accelerator pump unit.
http://www.crankshaftcoalition.com/w...celerator_pump

ramair_bryan

Well, That's in the correct spot. But that isn't it.
I'm going to the barn and get the numbers off the carb for you.
That would be cool if it is some sort of double pumper.......
(I should say, it runs very well with 73 primarys and CJ rods).

ramair_bryan

# 17057204
found a pic and everything. Can't get it here. You'll have to find one.

MelWff

sounds like you are describing the APT, adjustable part throttle, it's described in this link

http://www.crankshaftcoalition.com/w...APT.29_setting

ramair_bryan

That's it!
It's called an aneroid spool.
Say's it compensates for elevation.
Dang, I wonder if a blower was used this would make the carb work at psi
above 14.7
Thanks guys.
your the best.

Well, your in the top 2........