1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI

Author Topic: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI  (Read 3619 times)

Offline moprfrek

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1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« on: August 08, 2005 - 12:03:46 PM »
If you were to restore a 70 CHALLENGER CONVERT and you can't put in the original engine which one of these HEMI's would you install? I was dead set against the 5.7 until I did some reading on them and they are quite impressive.




Offline Carlwalski

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #1 on: August 08, 2005 - 12:14:36 PM »


528ci  ;D
1970 Dodge Challenger R/T
White, License Plate, 0A-5599
540ci Aluminium Hemi, F.A.S.T EFI
TF-727 Gear Vendor OD, Dana 60

Offline Pistol Gripper

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #2 on: August 08, 2005 - 12:27:21 PM »
No doubt about it, since one's a Hemi and one isn't.  528 Elephant motor.   :iagree:

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Offline Rev-It-Up

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #3 on: August 08, 2005 - 02:01:34 PM »
Yep!  I'd have to agree the 528 would be awesome. 
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Offline whitesatinmopar

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #4 on: August 08, 2005 - 02:38:56 PM »
 :thumbs: Yep, if you can afford to buy, install, and maintain the above, it's the one to launch the ride  :grinyes:
1969 Polara 500 vert.
1970 Charger 500
1971 Dart Swinger
1972 R/R 440+6 (wanabe)
1973 Challenger

Offline MEK-Dangerfield

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #5 on: August 08, 2005 - 02:49:04 PM »
I guess the operative word here is what CAN you afford??? The bigger the Hemi, the bigger the price. To be honest, none will ever be on my horizon.

  Mike

Mike

1970 Challenger - SOLD
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Offline hemi71

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #6 on: August 08, 2005 - 06:16:04 PM »
I think it depends on what you want to do with the car, and what you can afford. If all you want is a nice cruiser, and something with good street manners, the modern engine with fuel injection just might be the ticket. But for under the hood impact, and seat of the pants fun, the old hemi is the way to go. Now I dont know if i'd go the 528 full boogie motor, or the 426 or 472...just would depend on budget and what my goal was as far as driveability and acceleration.

Offline gb70

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #7 on: August 08, 2005 - 07:05:28 PM »
I have a Ray Barton 528 Hemi in my Cuda and am very happy!  I am running Accells Gen7 EFI software in place of dual carbs.  Runs strong, reliable, and gets 14 mpg on the freeway!  The pic shows a 1000 cfm which I changed out to a 1250 cfm.  The 528 cid Siamese Mopar block is fitted with Manley rods, JE pistons, aluminum Mopar heads, Pro Flow valves, a Comp Cams valvetrain featuring thingy Landy stainless roller rockers, and an Indy intake manifold.

« Last Edit: August 10, 2005 - 09:12:57 AM by gb70 »

Offline Carlwalski

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #8 on: August 09, 2005 - 03:47:40 AM »


Lovely engine gb70, welcome to the board I have not seen you around here.  :D :thumbs: :wave:
1970 Dodge Challenger R/T
White, License Plate, 0A-5599
540ci Aluminium Hemi, F.A.S.T EFI
TF-727 Gear Vendor OD, Dana 60

Offline Pistol Gripper

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #9 on: August 09, 2005 - 04:35:32 AM »
gb70,

Now that's a real HEMI  :thumbs:

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Offline Carlwalski

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #10 on: August 09, 2005 - 05:21:42 AM »


What is the weight difference between a 440 and HEMI, does anyone know? Both 70 blocks not modern.   :thumbs:
1970 Dodge Challenger R/T
White, License Plate, 0A-5599
540ci Aluminium Hemi, F.A.S.T EFI
TF-727 Gear Vendor OD, Dana 60

Offline Pistol Gripper

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #11 on: August 09, 2005 - 06:11:16 AM »
I stole this info:

331/354 Hemi with alum. intake and water pump -  504
392 Hemi with alum. intake and water pump ------ 564
Slant 6 --------------------------------------------- 525
273-340 ------------------------------------------- 525
360------------------------------------------------- 550
361-400 ------------------------------------------- 620
413-440 ------------------------------------------- 670
426 Street Hemi ----------------------------------- 765

Looks like the Hemi weighs about 95 lbs. more.

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Offline gb70

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #12 on: August 09, 2005 - 10:48:09 AM »

Lovely engine gb70, welcome to the board I have not seen you around here.  :D :thumbs: :wave:


Ya, I am a newbie to this web site.

I agree with hemi71 that an efi is very streetable.  The "stock" apperance was important so that when the hood scoop was on it would be mistaken for an original. I also wanted to establish raw touque, the fuel-injected Hemi was able to achieve 480-500 lb/ft of torque in the 2,800-3,000 rpm range—an output Hemis typically don’t see until around 4,000 rpm. 

Ray Barton is a very reliable, well known builder that should be considered if when you are ready.  Be sure to ask questions and add input as to how you want "your" hemi to be driven.  If you decide to go with an EFI system consider Accels software. 



« Last Edit: August 10, 2005 - 09:14:14 AM by gb70 »

Offline 4Cruizn

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #13 on: August 09, 2005 - 11:04:41 AM »
Thats a great looking car!! Love it!!  :drool:  :drool:  :drool:  Welcome to the site . . . hope you enjoy!!   :thumbs:

Offline ragtopdodge

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Re: 1970 CHALLENGER CONVERTIBLE 426HEMI VS 5.7 HEMI
« Reply #14 on: August 09, 2005 - 01:14:25 PM »
Ya, I am a newbie to this web site.

I agree with hemi71 that an efi is very streetable.  The "stock" apperance was important so that when the hood scoop was on it would be mistaken for an original. I also wanted to establish raw touque, the fuel-injected Hemi was able to achieve 480-500 lb/ft of torque in the 2,800-3,000 rpm range—an output Hemis typically don’t see until around 4,000 rpm. 

Ray Barton is a very reliable, well known builder that should be considered if when you are ready.  Be sure to ask questions and add input as to how you want "your" hemi to be driven.  If you decide to go with an EFI system consider Accels software. 






That looks like a 'Cuda Matt Delaney used to own.
'70 318-auto Chally 'vert
'71 383-auto 'Cuda 'vert (sold)
06 300c SRT8
04 2500 QCLB 4x4 HO