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340 Six Pack carbs on a 440? #522308 11/10/09 04:08 AM 11/10/09 04:08 AM
Joined: Jun 2004 Posts: 469 Hawaii D Dodgeballs OP mopar
Dodgeballs OP mopar D Joined: Jun 2004 Posts: 469 Hawaii	Checked the numbers on my six pack and the carbs are 340 carbs. Maybe that's why my 440 ran like crap with them on when I first got the car! Anyhow, I read that besides the jetting, the venturis are a different size than the 440 carbs. The 340 and 440 carbs are rated at the same cfm. I can change the jets in the main carb and I understand drilling out the metering blocks in the outboard carbs. Are there any other problems/ things I need to change for these to work?

Re: 340 Six Pack carbs on a 440? [Re: Dodgeballs] #522309 11/10/09 09:22 AM 11/10/09 09:22 AM
Joined: Jul 2008 Posts: 224 Kentucky E ewolfe enthusiast
ewolfe enthusiast E Joined: Jul 2008 Posts: 224 Kentucky	Well, that's a loaded question. The 340 and 440 carbs are interchangeable. I have 440 carbs on my 340, but for correctness, I'd like to have 340 carbs. Other than correctness, there is no need to worry about that. Drop some specs of the motor and what she's doing and maybe we can help. I dropped the ProMax stuff in mine and after some tuning, the car is unbelievable.

Re: 340 Six Pack carbs on a 440? [Re: ewolfe] #522310 11/10/09 02:04 PM 11/10/09 02:04 PM
Joined: Jun 2004 Posts: 469 Hawaii D Dodgeballs OP mopar
Dodgeballs OP mopar D Joined: Jun 2004 Posts: 469 Hawaii	Hey thanks. I didn't know if they would act differently to the same tune. I'm putting the setup on a different motor - which I haven't finished yet. Quote: Well, that's a loaded question. The 340 and 440 carbs are interchangeable. I have 440 carbs on my 340, but for correctness, I'd like to have 340 carbs. Other than correctness, there is no need to worry about that. Drop some specs of the motor and what she's doing and maybe we can help. I dropped the ProMax stuff in mine and after some tuning, the car is unbelievable.

Re: 340 Six Pack carbs on a 440? [Re: Dodgeballs] #522311 11/10/09 02:34 PM 11/10/09 02:34 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	the carbs dont know what engine they are on.. with some rejetting and adjustments they will work fine. 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: 340 Six Pack carbs on a 440? [Re: 70AARcuda] #522312 11/10/09 02:45 PM 11/10/09 02:45 PM
Joined: Feb 2006 Posts: 1,949 land of 10,000______'s B BDS871Cuda top fuel
BDS871Cuda top fuel B Joined: Feb 2006 Posts: 1,949 land of 10,000______'s	Quote: the carbs dont know what engine they are on.. with some rejetting and adjustments they will work fine. Tony is right on. Brent's 68 Runner 383 4 speed ran 4 different carbs from Edlebrock , Holly, to Demon. We also ran the same carbs on my CST pickup 327 stroked (383). With very little fine tuning they all ran great. but the Demon 750 made the most power. The annular boosters realy wake up the mid range and still have more top end. Snap your neck, mega G-force launch, is all I want!

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