General Category > Quadrajet Carb Talk and Tips
1972 chevy c30
jbh7052:
Pulling the airborne off today and setting the float level to 1/4. Does a spacer help enough with heat transfer to help alleviate some of the hot start symptoms? If so what height? Anything other than a thin plate will render the divorced choke useless right?
77cruiser:
It would help if it was plastic or wood. What is the fuel pressure?
jbh7052:
Not sure on fuel pressure. Factory style AC Delco pump. I will get a gauge and check that as well. Thanks for the help!
Cliff Ruggles:
The factory 1/4" thick gasket is plenty of insulation from the heat of the intake. Spacers make using the divorced choke a lesson in humility and I doubt if that's what the issue is anyhow.
Did you pressure test the casting during the rebuild to make sure the bottom plugs aren't leaking?....Cliff
jbh7052:
No sir I did not pressure test. However I marine tex the locations illustrated in your book. Sorry for the delay in my response...came down with strep and didn't feel like wrenchen on it. I set the float to just over 1/4 in from top of casting and plan on checking fuel pressure this week. Funny thing is my other quadrjet that you helped me build for specifically for my jeep has the same hot start. I must be doing the same thing wrong twice 🤔 Both are great starting and great running carbs. I will post what I find after fuel pressure test.
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