Jump to content

Carter AFB 3721SB for '63 Avanti R1?


michaelb
 Share

Recommended Posts

Sent off the carb from my '63 Avanti R1 to Dave Thiebaux for rebuilding assuming it was the Carter 3506s OEM carb.  TUrns out, it wasn't.   It's a Carter 3721SB  that was used primarily on Vette 327's in the early 60's.    Not certain why the previous owner made the swap.   I had driven the car for about a year before putting it on the lift recently for some brakework, with no fuel-related issues that I can recall. 

My question - what are the differences between this carb and the 3506s?  Am I setting myself up for future problems if I re-install it? 

BTW, an absolutely beautiful rebuild job by T-Bow!

Link to comment
Share on other sites

I believe the 3720  was the carb used on 65 Corvettes with a 300 HP 327.  The lesser HP 327's had an WCFB carb.  The service replacement for the 3720 was a 3721(s).  I can't find the CFM rating but the jet sizes are almost the same as a 3506, as is the CFM, which is around 630.

Edited by silverstude
Link to comment
Share on other sites

  • 4 weeks later...

The work Dave T does is beautiful. I have relied on him for years for parts, service, rebuilds and exchanges. Also an encyclopedia of information.

 

Mark

 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...