General Category > Quadrajet Carb Talk and Tips
LOW budget engine not working well....HELP!
jberenyi:
--- Quote from: Cliff Ruggles on August 03, 2021, 07:38:05 AM ---Did you change the timing set?
If so what did you use?
--- End quote ---
The original timing chain and gear was replaced. There was no slack at all in the original setup.
tayto:
OP, you need to give more details and answer the questions being asked. I just rebuilt a fresh 350 and had none of the issues you are having (low vacuum,poor running,etc). The carb has needed some minor work as it was a factory calibration minus the primary jets and rods supplied from Cliff. it sounds like not enough attention to detailed was paid to engine build. i hate to say this, but this is not a cheap hobby and when trying to go cheap you get what you pay for. been there done that. I've also found a lot of engine builders (even the "performance" shops) will put there nose up to some of the things you want. i had to be firm what I wanted and had to measured and check the machine shops work. i kept the quench tight even though machine shop warned me I was over 10:1 w/ iron heads. i didn't go crazy on camshaft and degreed it. so far it seems to run just fine on 89 octane, but I still have distributor tuning to do. i also am a firm believer in putting the engine on the dyno before putting it in your car/truck/boat. it is worth the few hundred dollars IMO to not have to worry about things once in vehicle. not trying to rain on your parade here....
77cruiser:
With that low of vac. on a stock type build, could possibly have retarded cam timing.
jberenyi:
--- Quote from: jberenyi on August 03, 2021, 10:41:49 AM ---The original timing chain and gear was put back in. There was no slack at all in the original setup.
--- End quote ---
tayto:
it has been asked twice if timing set was replaced and if so what TYPE. single roller, double roller, link belt (oem), non-adjustable, adjustable, etc. probably would be a good idea to include if the cam was degreed/checked.
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