470 stroker carb selection
#1393265
02/25/13 12:40 AM
02/25/13 12:40 AM
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Joined: May 2008
Posts: 322 San Diego, CA, United States
Texas_Charger
OP
enthusiast
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OP
enthusiast
Joined: May 2008
Posts: 322
San Diego, CA, United States
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Okay folks, I'm trying to select a carb for my 470 in my '71 Charger. Here are the specs on the engine: 470 ci 10.0:1 compression ratio 440 source CNC ported aluminum heads Hughes camshaft: .598/.606 lift, 242/246 duration at .050, 108* lsa (1.6 rockers included) 6500 redline Headers, 2 1/2 duals should weigh about 3600 auto tranny, 3.91 gears mostly street use with a few trips to the track per season. I'm looking for a vacuum secondary, electric choke. Suggestions have been the following: 850 holley dual feed 4150 (80531) 870 holley street avenger (80870) 770 proform street series (67258) What are y'all's thoughts on this? Thanks in advance!
1971 Dodge Charger SE 470/727/3.91 Suregrip 2016 Dodge Challenger Hellcat, 6-speed 1980 Pontiac Trans Am, Y84, WS6 2002 Ram 2500 Cummins/6-speed/2WD/QC 1971 Ford F-350 Ranger
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Re: 470 stroker carb selection
[Re: Texas_Charger]
#1393266
02/25/13 12:50 AM
02/25/13 12:50 AM
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Joined: Jul 2004
Posts: 4,732 Watertown, WI
MikeyT
master
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master
Joined: Jul 2004
Posts: 4,732
Watertown, WI
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I like the 850 dual feed for that engine. It is just a good design all around. I played with the Holley avenger series carbs. I don't like the springs in them. I also had some tuning concerns with my proform carb, to me Holley double pumpers work awesome!
1969 Dodge Dart Swinger
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Re: 470 stroker carb selection
[Re: MikeyT]
#1393267
02/25/13 11:40 AM
02/25/13 11:40 AM
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Joined: Jan 2003
Posts: 12,085 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,085
Benton, IL.
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Vacuum sec carbs certainly have their place, but you do not need one with those inches and gears. I would suggest a DP, but they are usually very rich in the transitions for the street. What type of intake? Dual or single plane? What is more important, top power or driveability? Can you tune the carb or will it be run without changes? And I would be surprised if a 470" will pull all the way to 6,500 with those heads and a 240ish cam. My 500" has ported Eddies and it is done by 6,200 or so with cams in the 260* range.
Master, again and still
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Re: 470 stroker carb selection
[Re: DaveRS23]
#1393270
02/25/13 03:30 PM
02/25/13 03:30 PM
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Joined: May 2008
Posts: 322 San Diego, CA, United States
Texas_Charger
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The intake is a holley street dominator. I'm really more concerned about driveability than top end power, as the car spends 98% of its time on the street. Also, I can tune the carb as well, so I'm not expecting it to be perfect out of the box. Oh, and I'm currently in Maryland but there's no telling where the navy is going to send me so I'd prefer to have a choke.
What advice can y'all offer on the Proform, Quick Fuel, or even the demon carbs as well as some of the others in comparison to a holley?
Last edited by NASCAR_Imperial; 02/25/13 03:31 PM.
1971 Dodge Charger SE 470/727/3.91 Suregrip 2016 Dodge Challenger Hellcat, 6-speed 1980 Pontiac Trans Am, Y84, WS6 2002 Ram 2500 Cummins/6-speed/2WD/QC 1971 Ford F-350 Ranger
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Re: 470 stroker carb selection
[Re: Texas_Charger]
#1393271
02/25/13 04:01 PM
02/25/13 04:01 PM
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Joined: Feb 2003
Posts: 2,138 tucson az
frank
top fuel
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top fuel
Joined: Feb 2003
Posts: 2,138
tucson az
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Quote:
The intake is a holley street dominator. I'm really more concerned about driveability than top end power, as the car spends 98% of its time on the street. Also, I can tune the carb as well, so I'm not expecting it to be perfect out of the box. Oh, and I'm currently in Maryland but there's no telling where the navy is going to send me so I'd prefer to have a choke.
What advice can y'all offer on the Proform, Quick Fuel, or even the demon carbs as well as some of the others in comparison to a holley?
I have a Proform 850 DP on my 496 engine. Just as good as a Holley in my opinion
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Re: 470 stroker carb selection
[Re: Texas_Charger]
#1393272
02/25/13 10:41 PM
02/25/13 10:41 PM
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Joined: Jan 2003
Posts: 12,085 Benton, IL.
DaveRS23
Special needs idiot
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Special needs idiot
Joined: Jan 2003
Posts: 12,085
Benton, IL.
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The Holley Street Dominator is one of my favorite intakes. I had one on my 500 for a good while. I even modded it to accept a Dominator carb. Ran real well. I don't know which of the carbs you listed would be best for you. Since you are more interested in their street manners than their all out performance, the best choice will be the one that is tuned the closest for your combo and therefore require the least tuning. The only way to find out is to try them. While I like the Double-Pumpers a lot, the vacuum secondary carbs are usually more street friendly in that they are not nearly as rich in the low speeds. Your ability to tune whichever carb you eventually select is probably more important than which carb you select. The biggest difference in between street oriented carbs of the same CFM is usually the low speed metering. Since you can deal with that, then the best carb is simply the one that is closest OOTB. If it matters, these engines love CFM. I run a 1050 Dominator on my mainly street 500. It replaced a 950 Proform on this engine and gained a full MPH at the track. So I would certainly go with something in the 850 Range. I have had good experiences with the Holleys and the Proforms, but I have always struggled with the Demons.
Master, again and still
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Re: 470 stroker carb selection
[Re: DaveRS23]
#1393274
02/26/13 01:11 PM
02/26/13 01:11 PM
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Joined: Aug 2005
Posts: 989 WI, USA
67dodge67
mopar addict
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mopar addict
Joined: Aug 2005
Posts: 989
WI, USA
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Quote:
If it matters, these engines love CFM. I run a 1050 Dominator on my mainly street 500. It replaced a 950 Proform on this engine and gained a full MPH at the track. So I would certainly go with something in the 850 Range. I have had good experiences with the Holleys and the Proforms, but I have always struggled with the Demons.
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Re: 470 stroker carb selection
[Re: gch]
#1393277
02/26/13 10:47 PM
02/26/13 10:47 PM
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Joined: May 2008
Posts: 322 San Diego, CA, United States
Texas_Charger
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enthusiast
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OP
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Joined: May 2008
Posts: 322
San Diego, CA, United States
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I'm running a 3000 stall converter, and I would be running an RPM or something a little taller than the street dominator intake but with my flat hood I already have clearance issues.
1971 Dodge Charger SE 470/727/3.91 Suregrip 2016 Dodge Challenger Hellcat, 6-speed 1980 Pontiac Trans Am, Y84, WS6 2002 Ram 2500 Cummins/6-speed/2WD/QC 1971 Ford F-350 Ranger
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