Quote:
Originally Posted by magwakeenercew2jh
Okay.
Street DeMon 625 stats call for between 5 and 6 PSI. I just wanted to get a piump that allows me to "throttle back" the fuel pressure
using the fuel pressure regulator so I can fine tune the flow.
I seem to getting lean "pops" after being into the secondaries for a few seconds (  ). Of course, there are a ton of reasons for
that symptom. Most of which, I've checked out.
It's no big deal. The old 350 runs strong....with a little pop once in a while...like I said...But I don't like to leave "almost well
enough" alone.
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Your street Demon is similar to the Holley 850 CFM 4150 on my big block. It will "pop" when coming off the secondaries if the rear float is not set right in the middle of it's range. A little time spent tweaking it and mine is just fine. Here in Arizona density altitude fluctuates almost 5000 feet between winter and summer. That's like setting your truck up to run in Kansas then driving to Denver. It won't be happy and when the seasons change and the engine leans out I have to change jets to get rid of that 'pop". Changing fuel pressure doesn't get it done on my Holley!