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What size carb??? #1341653 11/26/12 01:57 PM 11/26/12 01:57 PM
Joined: Sep 2006 Posts: 3,010 Sac, CA M mopowers OP master
mopowers OP master M Joined: Sep 2006 Posts: 3,010 Sac, CA	What size Holley would you put on a fresh 340 in a Dart? I have a 750, but do you think it'd be too big. The car is just a cruiser. Car has an auto trans. Would a 600 work better?

Re: What size carb??? [Re: mopowers] #1341654 11/26/12 02:50 PM 11/26/12 02:50 PM
Joined: Jul 2007 Posts: 1,526 North Carolina cjskotni pro stock
cjskotni pro stock Joined: Jul 2007 Posts: 1,526 North Carolina	Yes a 750 is way too big for most applications. A 750 would be more suited for a 440 and some people even use them on BB strokers! If I were you, I'd go with a 600 for stock/mild 340 or maybe a 650 IF the 340 is a pretty wild. Sounds like a 600 would be fine for your application. Overcarbing will make the motor a slug down low...

Re: What size carb??? [Re: mopowers] #1341655 11/26/12 07:23 PM 11/26/12 07:23 PM
Joined: Aug 2003 Posts: 43,163 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,163 Bend,OR USA	Quote: What size Holley would you put on a fresh 340 in a Dart? I have a 750, but do you think it'd be too big. The car is just a cruiser. Car has an auto trans. Would a 600 work better? I would put the 750 on and try it, you can always switch it later. You may be pleasently suprised Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: What size carb??? [Re: mopowers] #1341656 11/26/12 07:25 PM 11/26/12 07:25 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	Quote: What size Holley would you put on a fresh 340 in a Dart? I have a 750, but do you think it'd be too big. The car is just a cruiser. Car has an auto trans. Would a 600 work better? your right foot controls how big that 750 gets... Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: What size carb??? [Re: mopowers] #1341657 11/26/12 09:15 PM 11/26/12 09:15 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	If the 750 you have is a regular holley 3310 vacuum secondary carb you should be able to tune it for the 340. However if the car is just a cruiser you might be happier with the extra throttle response and mpg of an edelbrock 600-650 cfm.

Re: What size carb??? [Re: mopowers] #1341658 11/26/12 09:23 PM 11/26/12 09:23 PM
Joined: Jan 2003 Posts: 5,443 Indiana Y YO7_A66 master
YO7_A66 master Y Joined: Jan 2003 Posts: 5,443 Indiana	Can you tell us more about the 750 that you already have? What converter and gears do you have? 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: What size carb??? [Re: mopowers] #1341659 11/26/12 09:38 PM 11/26/12 09:38 PM
Joined: Nov 2009 Posts: 2,275 Desert Tracker H HYPER8oSoNic top fuel
HYPER8oSoNic top fuel H Joined: Nov 2009 Posts: 2,275 Desert Tracker	Quote: What size Holley would you put on a fresh 340 in a Dart? I have a 750, but do you think it'd be too big. The car is just a cruiser. Car has an auto trans. Would a 600 work better? If you have a hotter-than-stock cam and 3k or more stall converter in the transmission, go with the 750 cfm. Otherwise, the 600 cfm would work well with the stock converter. "Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)

Re: What size carb??? [Re: mopowers] #1341660 11/26/12 10:08 PM 11/26/12 10:08 PM
Joined: Apr 2008 Posts: 1,285 Pacific NW USA CompSyn pro stock
CompSyn pro stock Joined: Apr 2008 Posts: 1,285 Pacific NW USA	I once ran a 3310 on a slightly warmed up 318 because that's what I had available to me at the time. The 750 Holley, for me, provided for a more trouble-free combo than the 600cfm Carter AFB it replaced. I'd say if you've got it, run it. A carb is always something that's easy enough to change later on.

Re: What size carb??? [Re: mopowers] #1341661 11/26/12 10:41 PM 11/26/12 10:41 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: What size Holley would you put on a fresh 340 in a Dart? The car is just a cruiser. Car has an auto trans. Would a 600 work better? I believe so & just me I'd suggest an eddy 1406 (600 elec choke) or any AFB that you can get a good deal on live every 24 hour block of time like it's your last day on earth

Re: What size carb??? [Re: mopowers] #1341662 11/27/12 07:33 AM 11/27/12 07:33 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	How can a 750 be to big when the 340-6 engines had over 1300 CFM? A 750 properly jetted would be fine. A 600 would have better throttle responce on the bottom end but lack on the top end where the 750 would still be working.. I am truckless..

Re: What size carb??? [Re: 340SHORTY] #1341663 11/28/12 02:52 AM 11/28/12 02:52 AM
Joined: Sep 2006 Posts: 3,010 Sac, CA M mopowers OP master
mopowers OP master M Joined: Sep 2006 Posts: 3,010 Sac, CA	The car has a newer 600 edelbrock on it now. I've never been a big edelbrock fan. I had the fuel evap issue they tend to have The 750 holley I have is a double pumper. Wish a had a holley 600vac sec for it. How much are those these days??? The 340 is basically stock. It's got a purple shaft hyd flat tappet with a stock convertor and 3.23 gear. Its just a cruiser.

Re: What size carb??? [Re: mopowers] #1341664 11/28/12 03:44 AM 11/28/12 03:44 AM
Joined: Apr 2008 Posts: 1,285 Pacific NW USA CompSyn pro stock
CompSyn pro stock Joined: Apr 2008 Posts: 1,285 Pacific NW USA	Quote: Wish a had a holley 600vac sec for it. How much are those these days??? Here's one currently on eBay. $50.00 dollars and zero bids - http://www.ebay.com/itm/290818624360?ru=...4360%26_rdc%3D1

Re: What size carb??? [Re: CompSyn] #1341665 11/28/12 07:51 AM 11/28/12 07:51 AM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	For a street cruiser I'd go with the 600-650 size carb, my choice would be the Edelbrock. FWIW, I dyno'd a 512 stroker that only used 780 cfm at the peak.Dave

Re: What size carb??? [Re: quickd100] #1341666 11/28/12 05:20 PM 11/28/12 05:20 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	Used them all and will say on stick 340 use the 750 dbl pump or the 3310. Pure street 650 Dbl pump or 600 vac sec. On carter side use a AVS not the AFB and spread bore on spread bore intake I used TQ and Rochesters they all have there advantages. The Holleys were always faster one ecception was a maxed out AVS that was close to 750 dbl pumper time wise, but the AVS with no choke was real pain to start outside on cold days. Holleys don't really need a choke to start even on cold days if car is tuned correctly

Re: What size carb??? [Re: Paul_Fancsali] #1341667 11/29/12 09:01 PM 11/29/12 09:01 PM
Joined: Jan 2003 Posts: 1,481 Outside thedriver pro stock
thedriver pro stock Joined: Jan 2003 Posts: 1,481 Outside	750 is too big, for a sbc! My 340 only went faster when I went up in carb size, it probably used more gas? But it was way more fun, so I didn't care. 1973 challenger Dana. 4 speed. Low deck.

Re: What size carb??? [Re: mopowers] #1341668 11/29/12 10:26 PM 11/29/12 10:26 PM
Joined: Jan 2012 Posts: 1,650 Harm City Md. Dan Halen top fuel
Dan Halen top fuel Joined: Jan 2012 Posts: 1,650 Harm City Md.	IIRC Chrysler used 800 CFM Thermoquads on 340s '71?-'73.

Re: What size carb??? [Re: Dan Halen] #1341669 11/30/12 07:44 AM 11/30/12 07:44 AM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	Quote: IIRC Chrysler used 800 CFM Thermoquads on 340s '71?-'73. Yes they did but they didn't use all 800 cfm.Dave

Re: What size carb??? [Re: mopowers] #1341670 11/30/12 09:45 AM 11/30/12 09:45 AM
Joined: Mar 2005 Posts: 2,060 Pendleton NY T terzmo top fuel
terzmo top fuel T Joined: Mar 2005 Posts: 2,060 Pendleton NY	600 to 650 max

Re: What size carb??? [Re: terzmo] #1341671 11/30/12 01:05 PM 11/30/12 01:05 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	Is the 750 comparable to a funnel and gas can? I don't think I've ever run anything on my 340's smaller than a 750 Holley. If you can tune it, a 750 will run fine on even a stock 340. If you have a 750, run it and see how you like it.

Re: What size carb??? [Re: RobX4406] #1341672 11/30/12 01:32 PM 11/30/12 01:32 PM
Joined: Sep 2006 Posts: 3,010 Sac, CA M mopowers OP master
mopowers OP master M Joined: Sep 2006 Posts: 3,010 Sac, CA	Quote: Is the 750 comparable to a funnel and gas can? I don't think I've ever run anything on my 340's smaller than a 750 Holley. If you can tune it, a 750 will run fine on even a stock 340. If you have a 750, run it and see how you like it. That's what I'm gonna do. Just wish it was a vac sec 750 and not a double pumper. Maybe i can get someone to trade me for a 650 DP.

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