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Re: 347 problems
Quote:
Originally Posted by 347Maverick
it has 70 fronts 72 rear at the moment, it's had up to 82 front 84 rear with no change in the mis-firing between the jets...i know vaccum carbs aren't quite as good but the street avengers are good carbs from everything i've seen, but they do open fine
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Yup...thats small. My 770 SA on a 331 was professionally tuned with 72s and 80s as I recall. My 750 DP was professionally tuned with 71s and 82s (or 83s...can't remember for sure). Both worked great although the 770 SA was selected for the car when I had a C4 and it would never open fully on the Secondary side for whatever reason despite light spring, opened up orifice (maybe the carb was too big for the engine). Migrated to a T5z and single plane and changed to a 750 DP and have never looked back.
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Tracy Blackford: Anaheim Hills, Ca
'65 FB Mustang 331, 282S cam, ported 351W heads. T5z, 3.50 posi.
new rebuild...single plane, more head work, 360 RWHP goal. 
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