I'm running a 350 chevy with a B&M small blower,a single 600CFM Edelbrock carb and a Mallory Unlite distributor with a hyfire box. Now the problem, had a couple of pops like small back fires, leaving the house in the morning to get gas. On leaving the service station, it started popping again and no power. I limped along for about 6 or 7 blocks then shut it down and had it hauled home. I have a feeling it is an ignition problem, however when I tried starting it again, it didn't want to run, but pumping the gas did keep it running a little. A friend said he had read an article, that mention a Mallory distributor with a similar problem. Any information would be greatly appreciated. My email is streetrodderdoug@shaw.ca
The symptoms you describe are common to both ignition problems, and fuel starvation problems. If you have another distributor you can install to test, that would be one way to troubleshoot it. You might also remove the hyfire box, and see if that changes anything. Might also check the timing, and that the advance is working properly. Make sure the fuel system is working right....no vacuum leaks, good fuel pressure, etc.
https://itstillruns.com/troubleshoot-mallory-unilite-distributor-spark-8076598.html Check out the unilite. I've run a few of them, they're normally reliable, but can have some issues.
Newly built? Fresh carb? Sounds like it leaned out to me. No leaks between the blower/ intake? No pro here, but I'd pull a plug and take a look at it
I'm with the big guy. Pull all the plugs and inspect. Something failed suddenly like a fried or missing electrode or cracked insulator tip. With a blower, your air/fuel ratio can be out of stoich at some point in its operating range. Certainly, you can have an ignition problem, as has been suggested. Checking the plugs is free plus 20 minutes of time. If the plugs are intact their condition can perhaps give you clues about the spark also.
Running fine up to this point ? did you fiddle with anything or new issue ? I would lean towards ignition or vacuum leak first . but like @squirrel said could be fuel starvation.
Actually it sounds like ****y fuel, I had a blown 283 do the same exact thing, wasn't till I pumped fuel into a gl*** container for observation did I realize it! You mentioned low fuel, an would run Better pumping... Check fuel for water!
Which 600? There is a model number on it. Did you make any changes to the jets/springs/rods/accelerator pump?
Lol,,,,,he wasn’t locked up,,,,,he’s 84 years old. Probably not very computer savvy and needs some help . Come on guys . Tommy
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