70 roadrunner 383 or 440 ?
#922382
02/06/11 04:52 PM
02/06/11 04:52 PM
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Joined: Apr 2010
Posts: 398 Texas
70Runnerdude
OP
enthusiast
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OP
enthusiast
Joined: Apr 2010
Posts: 398
Texas
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I would like to get some of you alls opinions on this. I am going to build an engine for my 70 roadrunner wich originaly had a 383. It does not have its original engine so it is not numbers matching. Now I can build a 70 model 440 hp for it or a 70 model 383 hp for it the rebuild would be the same cost pretty much so what would you build the 383 or the 440 and why ? Thanks for your input. Dave
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Re: 70 roadrunner 383 or 440 ?
[Re: mikemee1331]
#922391
02/06/11 06:09 PM
02/06/11 06:09 PM
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Joined: Jan 2003
Posts: 33,120 Grand Prairie,Texas
stumpy
I Win
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I Win
Joined: Jan 2003
Posts: 33,120
Grand Prairie,Texas
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Mainly because not everyone buying a B body wanted a hot rod. B-bodies were your normal every day driver for a lot of people. There's about 25-30 hp difference but ther's almost 50-60 ft lbs of torque difference. Torque is what moves the car not hp.
Last edited by stumpy; 02/06/11 09:13 PM.
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Re: 70 roadrunner 383 or 440 ?
[Re: stumpy]
#922392
02/06/11 06:13 PM
02/06/11 06:13 PM
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Joined: Jan 2003
Posts: 9,436 Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
Mainly because not evryone buying a B body wanted a hot rod. .
And a lot still don't!
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Re: 70 roadrunner 383 or 440 ?
[Re: 70Runnerdude]
#922393
02/06/11 06:17 PM
02/06/11 06:17 PM
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Joined: Jan 2003
Posts: 8,946 Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,946
Holly/MI
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Life is short, go for the big cubes.
It's the bigger torque that will move the B-body better.
All things being equal, the 383 has to spin higher, move more air, to make the same HP.
A 383 with the 440 crank (like a 451, but smaller bore) only makes a 438 at .060 over.
If you want fuel efficiency and awesome high end throttle response...........stay 383.
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: 70 roadrunner 383 or 440 ?
[Re: 62maxwgn]
#922394
02/06/11 06:17 PM
02/06/11 06:17 PM
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Joined: Nov 2007
Posts: 21,910 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,910
Kirkland, Washington
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Quote:
Quote:
Mainly because not evryone buying a B body wanted a hot rod. .
And a lot still don't!
...for them we have chevys
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Re: 70 roadrunner 383 or 440 ?
[Re: 70Runnerdude]
#922395
02/06/11 06:43 PM
02/06/11 06:43 PM
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Joined: Dec 2007
Posts: 18,165 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,165
Mass
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Quote:
the rebuild would be the same cost pretty much so what would you build the 383 or the 440 and why ? Dave
Kind of a no-brainer, the 383 simply won't pull the same HP/torque the 440 can using the same build criteria
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Re: 70 roadrunner 383 or 440 ?
[Re: screamindriver]
#922400
02/06/11 08:11 PM
02/06/11 08:11 PM
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Joined: Oct 2010
Posts: 146 rhode island
bomber1965
member
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member
Joined: Oct 2010
Posts: 146
rhode island
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Quote:
Hot Rodders number 1 rule, repeat after me : "There is no substitute for cubic inches"...
I thought it went....." There's no Replacement for Displacement! "
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