Quote:
Originally Posted by rumblefish360
IMO, I'd look for the big primary T-Q.
Anyway, a stock 77 - 440 isn't exactly a power house and the year is a bogged down engine. Dead on ratio and emmissions, etc... I have a 78 - 400, it's another dead on arrival engine.
Gear ratio has some say in this, but a 8-1/4????
OK, your not goona like this one but.
650 - 700 max.
Yeah, I know the engine as it is now is no power house, so I wasn't expecting much... Why so small though? Aren't the stock Thermoquads on the 440 850cfm?
The earlier 440's, like a 67 Imperial, came with small Carter AFB's (FYI, 600's) that also should be noted, were devoid of secondary velocity plates. These monster cars were Hwy. cruisers and did real well.
(So my suggestion was genours by 50 - 100 cfm's.)
You asked about a replacement carb and not knowing the gear ratio, just that it is a low powered 400 from the smog error, will cause me to suggest a lower CFM carb in error of a better running engine/car rather than a blind answer of "Hey dude, get a 750/850 and slap that Beouch on there and letter rip!" Answer.
Though I did kind of figure in it's a car without emmissions and probably a performance item or two, the extra cfm may be handy even on a lowly power B engine.
I have a 750 on my '78 / 400 and I'm not to amused with it. The change is coming. ('79 Magnum, '78/400-727-3.55 on26 inch tires. The longer it runs, the better it goes, but it take a long time to get to the point where I like it.)
The reason a T-Q with it's large 850 cfm rating works so well is the combo of small primaries and a spring loaded secondary door that be an easy tune to only allow it to open when the engine can use it and over come the spring tension. Secondary size is 2-1/4 X 2. That's where the main extra CFM comes in and, of course, that classic MoPar sound. (
ROAR!)
I currently have a 71 / 440 T-Q on my 318 and tuned in. No burning eyes, no foul smell of unburnt gas. Just stomp on it and it goes.
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