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Re: Need Advice On Choosing Carburetor , New Build
[Re: Cab_Burge]
#1448290
06/07/13 09:35 PM
06/07/13 09:35 PM
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Joined: Jan 2003
Posts: 12,814 Benton, IL.
DaveRS23
Master of nothing...
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Master of nothing...
Joined: Jan 2003
Posts: 12,814
Benton, IL.
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Quote:
Quote:
The double pumpers are a race oriented carb and are very, very rich for street driving. They work good but will wash down your cylinder walls and foul your oil without a good bit of re-work on the transition and cruise circuits.
850 is a good CFM range for 451". But a more street oriented carb would be better suited to the majority street time the car is intended for.
Either way, some tuning will be in order. But a street carb should be closer OOTB than a race carb for a predominately street car.
Holley has made many different jetting and circuit changes on a lot of there HP DP carbs, the 4781 in particular. I have three of them now, a 4781 no dash #, a 4781-2 and a 4781-7. The -7 is a lot better at part thtrottle on my wideban than the other two. As I agreed to on Brian post, a new 4781 with the curent dash # should be awesome, the Holley 950 HP works very well on the street also
The part throttle and cruise has always needed the most help on the 850DPs I have tuned. It is good to hear that Holley addressed that issue. I haven't had one of the new ones on my wide band, but if they have gotten the cruise in the 14+ range, then that would obviously be a good choice.
I agree that a 950 would not be too much either. I run a 1050 Dom on my street/strip 499 wedge and it cruises at 14.5+/- after a good bit of work.
Master, again and still
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Entire Thread
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Need Advice On Choosing Carburetor , New Build
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titan
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06/06/13 03:37 AM
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Re: Need Advice On Choosing Carburetor , New Build
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Brian Hafliger
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06/06/13 06:20 AM
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Re: Need Advice On Choosing Carburetor , New Build
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dogdays
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06/06/13 06:30 AM
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Re: Need Advice On Choosing Carburetor , New Build
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bentwheel43
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06/06/13 02:10 PM
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Re: Need Advice On Choosing Carburetor , New Build
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Cab_Burge
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06/06/13 06:52 PM
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Re: Need Advice On Choosing Carburetor , New Build
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DaveRS23
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06/06/13 02:48 PM
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Re: Need Advice On Choosing Carburetor , New Build
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dogdays
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06/06/13 05:53 PM
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Re: Need Advice On Choosing Carburetor , New Build
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Cab_Burge
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06/07/13 06:58 PM
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Re: Need Advice On Choosing Carburetor , New Build
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DaveRS23
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06/08/13 01:35 AM
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Re: Need Advice On Choosing Carburetor , New Build
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Darryls-Demon
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06/08/13 02:31 AM
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Re: Need Advice On Choosing Carburetor , New Build
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BSB67
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06/08/13 02:43 AM
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Re: Need Advice On Choosing Carburetor , New Build
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68HEMIRR
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06/11/13 04:45 AM
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Re: Need Advice On Choosing Carburetor , New Build
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rickseeman
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06/11/13 02:19 PM
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Re: Need Advice On Choosing Carburetor , New Build
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Dodgem
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06/06/13 06:11 PM
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Re: Need Advice On Choosing Carburetor , New Build
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DaveRS23
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06/07/13 12:53 AM
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Re: Need Advice On Choosing Carburetor , New Build
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Thumperdart
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06/07/13 03:21 PM
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Re: Need Advice On Choosing Carburetor , New Build
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BSB67
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06/07/13 02:00 AM
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Re: Need Advice On Choosing Carburetor , New Build
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383man
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06/07/13 03:07 AM
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