Re: Holley 3310 (750) or 850 Double Pumper?
[Re: RapidRobert]
#195716
01/17/09 02:18 AM
01/17/09 02:18 AM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,163
CT
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With that cam go with vacuum secondaries, I like the 850 CFM but with that cam you will have trouble at idle with a rich condition. I think an 850 is perfect for a 440 but the double pumpers have a rich idle circuit which is great when you have alot of duration, helps it idle smoother, but with such a mild duration its just going to cause frustration with fouled plugs and a smelly car. Just my 
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Holley 3310 (750) or 850 Double Pumper?
[Re: GTX MATT]
#195720
01/17/09 02:23 PM
01/17/09 02:23 PM
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Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
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Quote:
With that cam go with vacuum secondaries, I like the 850 CFM but with that cam you will have trouble at idle with a rich condition.
I think an 850 is perfect for a 440 but the double pumpers have a rich idle circuit which is great when you have alot of duration, helps it idle smoother, but with such a mild duration its just going to cause frustration with fouled plugs and a smelly car. Just my
Thats not my experience. I run the lunati 60303 cam in a 440, with an 850DP and an Eddy RPM. (I have a 4-speed, otherwise I would run a VS). Rich idle? Nope...actually very clean. I would suspect if one did experience a rich idle in this combo the transfer slot exposure would need to be adjusted.
Great street cam by the way.
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Re: Holley 3310 (750) or 850 Double Pumper?
[Re: Pacnorthcuda]
#195721
01/17/09 02:51 PM
01/17/09 02:51 PM
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Joined: Aug 2003
Posts: 4,384
Madison Wi
NTOLERANCE
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master
Joined: Aug 2003
Posts: 4,384
Madison Wi
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IMO, I would install the 3310 first. Tune the carb, get it running and see how you like it. I feel the 3310 is a pretty basic, user friendly carb, for those who are a bit carb challenged. ( I admit to being a bit carb challenged at times  ) I have had a number of 3310 carbs and really liked them all.
I used to care but....... things have changed
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Re: Holley 3310 (750) or 850 Double Pumper?
[Re: NTOLERANCE]
#195722
01/17/09 04:06 PM
01/17/09 04:06 PM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Quote:
IMO, I would install the 3310 first. Tune the carb, get it running and see how you like it.
I feel the 3310 is a pretty basic, user friendly carb, for those who are a bit carb challenged. ( I admit to being a bit carb challenged at times )
I have had a number of 3310 carbs and really liked them all.
I second that but with 500 inches I'd give the 850 the old college try make sure it has a new power valve / valves and proper jetting. 80's front with a power valve and 88 without and the same on the secondaries. over jetting and bad power valves are the biggest issues on Holley carb
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Re: Holley 3310 (750) or 850 Double Pumper?
[Re: srunge55]
#195728
01/19/09 03:54 AM
01/19/09 03:54 AM
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Joined: Jan 2004
Posts: 6,445
Missouri
68KillerBee
master
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master
Joined: Jan 2004
Posts: 6,445
Missouri
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Quote:
Demon plus money. It was a fair deal. For him :-)
Yeah its black with silver stripes. Its been around for while, I'm sure you've seen it. I am working on repainting it now also going through the motor even though its fairly fresh.
good stuff. i can't think of his last name. but my family has known that guy for quite a few years. my cousin bought a challenger off of him.
good luck with it  . can't wait to see it done
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Re: Holley 3310 (750) or 850 Double Pumper?
[Re: Mr.Yuck]
#195731
01/19/09 06:13 PM
01/19/09 06:13 PM
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Joined: Jul 2004
Posts: 805
San Francisco Bay Area
MrAngry
super stock
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super stock
Joined: Jul 2004
Posts: 805
San Francisco Bay Area
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my combo is very similar to yours... I went from an 850DP to a 3310 to an 800DP... 800DP is BY FAR the best in terms of performance. With the 3310 the car felt downright anemic.
Never trust a pretty girl... or a lonely midget.
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Re: Holley 3310 (750) or 850 Double Pumper?
[Re: MrAngry]
#195732
01/19/09 08:55 PM
01/19/09 08:55 PM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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I run an 850 DP on the mild 440 in my 63 and it works very good. It has a nice clean idle and still launches great at the track with no stumble at all. It is basically a stock 850 with the choke blade removed and jetted up a tad. I also drilled the squirters a bit but thats it. In fact the last time I went to the track I ran on the same plugs that have been in it for a year. DP carbs work great on auto's as mine and my sons cars are both auto's and he uses a 750 DP on his Dart. Either carb will work on your street car with 3.55's but if you plan to race it some I would go with the DP. Ron
Last edited by 383man; 01/19/09 08:56 PM.
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