proper year code for matching carb to engine?
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Joined: Mar 2010
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From: Houston TX
proper year code for matching carb to engine?
My '74 LS4 has a matching number Engine and Tranny (TH400), but has an edelbrock 1406 mated to the original intake with an open element air cleaner. The engine is a fresh rebuild, but in spite of what seems to be a solid setup/rebuild it's still not running/sounding quite right.
I have my suspicions that the carb just isn't right or not cutting it. I did notice that gas was 'puddling' in the back two bores on the side as well as just the overall crappy idle/power. Timing is all good it seems and everything else up so thinking its time to go ahead and flip the carb.
My goal is to go back with a year matching/model Q-Jet for that engine and an original air cleaner assembly - thanks to Lars' information and spreadsheet I believe the Q-Jet model I'm looking for is 7044225, but where I get lost is these date codes - so long as I find that model do I need to worry about date codes to match things up well, or do is there another lay of specificity that I need to watch out for in these date codes to match up? If so, how do I know what date ranges I need?
Oh, and of course if anyone has one out there to let go for cheap that I can send to Lars for a rebuild, feel free to PM me
I have my suspicions that the carb just isn't right or not cutting it. I did notice that gas was 'puddling' in the back two bores on the side as well as just the overall crappy idle/power. Timing is all good it seems and everything else up so thinking its time to go ahead and flip the carb.
My goal is to go back with a year matching/model Q-Jet for that engine and an original air cleaner assembly - thanks to Lars' information and spreadsheet I believe the Q-Jet model I'm looking for is 7044225, but where I get lost is these date codes - so long as I find that model do I need to worry about date codes to match things up well, or do is there another lay of specificity that I need to watch out for in these date codes to match up? If so, how do I know what date ranges I need?
Oh, and of course if anyone has one out there to let go for cheap that I can send to Lars for a rebuild, feel free to PM me
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Joined: Mar 2010
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From: Houston TX
Actually, had another question, on the list that Lars sent, I noticed that there were actually two number that seemed like they referenced what I should be looking for on my LS4, 7044223 and 7044225 - is there any reason I should match one over the other - I don't quite follow the differences and/or how I would know what was originally in my car.
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Joined: Jul 2001
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If your car was 49 state compliant, it came with a 7044225. If it started life in CA, it had a 7044505. Finding a carb with the correct numbers and date is nice but it's just the tip of the iceberg. Who knows what Bubba might have done to the carb in the last 40 years?
If you're not worried about judging I'd sooner start with a decent core and have Lars go through it making sure it's 100% functional.
If you're not worried about judging I'd sooner start with a decent core and have Lars go through it making sure it's 100% functional.
Thread Starter
Advanced
Joined: Mar 2010
Posts: 78
Likes: 0
From: Houston TX
If your car was 49 state compliant, it came with a 7044225. If it started life in CA, it had a 7044505. Finding a carb with the correct numbers and date is nice but it's just the tip of the iceberg. Who knows what Bubba might have done to the carb in the last 40 years?
If you're not worried about judging I'd sooner start with a decent core and have Lars go through it making sure it's 100% functional.
If you're not worried about judging I'd sooner start with a decent core and have Lars go through it making sure it's 100% functional.
