Thread: sluggish down low! help!
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06-15-2014 11:01 PM #1
sluggish down low! help!
Hey guys. So today I drove my car around my neighborhood today for the first time ever! I was super pumped! Brakes work great. Steering is tight! Little backround on it.
It's a 75 trans am with a 4 bolt main Chevy 350. It's punched to a 355. 10.5:1 compression. Running on Sunoco 93 pump gas. It has cast iron 2.02 camel back heads. Ported and polished. Has a edelbrock victor Jr. Highrise intake with a carb spacer. It's feed by a Holley 750 double plumper mechanical choke. The choke is wired open. HEI distributor. The cam is unknown spec. But it only pulls 6-10 inchs of vacuum.
Now the bad. It's just extremely sluggish down low. Below 3k I'd say. It breaks up a little also. The car starts fine! No hesitation. Also the idle jumps around a little. Between 900-1100. I'm not exactly sure where the timing is set. It's been a few months since I set it. I wanna say it's at 16 degrees. It did back fire once thru the carb. Should the power valve be replaced? I was wondering if this was a carb/fueling issue or if it's a timing issue or a combination of them. Any insite or things to try is greatly appreciated!
Thanks in advanced guys! And when in doubt burn out!
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