Vacuum hose connection on 30064 Dual quad setup
When I unboxed the 30064 dual throttle bodies there was a vacuum line connected to the main master unit but the instructions didn't mention if I should tee the line and connect it to the slave unit? I've added a pic of what I did teeing the hose, but can anyone tell me if I should change it back to just being on the single master unit or leave it. I don't think it negatively affected the setup, but thought I should be sure.
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All you are doing is giving the regulators a vacuum reference. If it is running fine, it shouldn't be a problem. If you have a fuel pressure gauge, you might be able to see the difference between vacuum and non vacuum. Pressure drop will be different on fast throttle changes.
I'm using the intank Fitech pump without a return line. Is it even necessary to run any vacuum to the regulators?
Nope that would do nothing.