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Old 04-22-2011, 06:04 AM
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carbs

i have a 385 gm fastburn engine with a zz383 cam it has a 780 holly duel feed with no choke wanting to change for carb with auto chock and manual secondaries any ideas

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Old 04-22-2011, 07:59 AM
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Quote:
Originally Posted by blackchevy3de
i have a 385 gm fastburn engine with a zz383 cam it has a 780 holly duel feed with no choke wanting to change for carb with auto chock and manual secondaries any ideas
I would think the 780 vacuum secondary carb would be a good match to that engine. In fact, if you had asked "What carb should I run on this engine?", I'd have said a Holley 3310 (or similar) carb. If the 780 still has the choke tower intact, I'd simply convert it or use a manual choke. If the choke flap is missing, find one from elsewhere to put on it.

Anyway, generally speaking electric or 'automatic' chokes aren't used on DP carbs. That said, you can buy an electric choke conversion from Holley. Or pirate one from a core (will probably require some linkage fabrication).

If you are running a dual plane intake, use a carb like the Holley 4777 (650 cfm DP) if you think you have to have a DP carb- a 750 like the 4779 is going to likely be too big and street performance will suffer.
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Old 04-22-2011, 08:42 AM
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^^^x2^^^^


if you are just not happy with the 780 then i would suggest the 3310. and as mentioned you dont see too many elc choke DP's. you should look into converting the 780's manual into an elc (i'm suprised it didn't have one)
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Old 04-22-2011, 09:49 AM
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Quote:
Originally Posted by my87Z
...you should look into converting the 780's manual into an elc (i'm suprised it didn't have one)
He may have the Holley 3310-1 they were 780's. In any event, if it IS a 3310, for converting it to an electric choke use Holley kit p/n 45-223.
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Old 04-22-2011, 10:44 AM
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Originally Posted by cobalt327
He may have the Holley 3310-1 they were 780's. In any event, if it IS a 3310, for converting it to an electric choke use Holley kit p/n 45-223.

? same body just different venturies ??
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Old 04-22-2011, 10:54 AM
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Originally Posted by my87Z
? same body just different venturies ??
The 3310-1 has downleg boosters, AFAIK that's where the difference comes from.
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