89fiveeight

I'm pretty confident that BB stands for brake booster, but what do the rest of them do? What can stay and what can go? And lastly, what provides the vacuum?

Mike T

This link should help you out...http://oldfuelinjection.com/?p=93 The intake provides the vacuum, by the way.

89fiveeight

Thanks for the link. What will provide it now since I'm swapping to carb? The carb itself?

Mike T

You have an intake connector on the back of the intake manifold to pull vacuum from. You can still use that vacuum tree if you need it to tee off of.

89fiveeight

Ok, so the intake plugs up to the tree to provide vacuum for my brake booster etc? Fuel delivery to a carb is provided from vacuum too isn't it? Is that provided by the intake air flow

Mike T

A mechanical fuel pump with a hard line to the front of the carb provides fuel.

89fiveeight

I'm not running a mech pump. I realize a pump pressurizes the lines but I was under the impression that a carb took what it needed from vacuum and everything else returned to the tank in the return line. This has gotten extremely confusing and off topic. What do the other 4 branches on the tree provide vacuum for

Mike T

You'll have to run a fuel pressure regulator with an electric pump. It only needs 7 psi.

Mike T

This is your thread, you can go off topic all you want. Read this from Jegs on carbed engines...http://www.jegs.com/s/tech-articles/...+System+Tuning

89fiveeight

I understand that, I've got fuel delivery under control, I'm just trying to find a a vacuum diagram or someone who can tell me what I'm still going to need to provide vacuum to, and what the tree provides vacuum to. The car is stripped and the motor and fuel delivery is all new