modern tech analysis 1965 426 Hemi
#1634349
06/16/14 12:26 PM
06/16/14 12:26 PM
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Joined: Jan 2006
Posts: 8,162
USA
360view
OP
Moparts resident spammer
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OP
Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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my apologies if this has been posted before http://www.auto-scape.com/?p=305this a very technical report that uses many modern engineering terms, but is worth struggling through and studying the many graphs that compare the 426 to more modern engine designs like the 5.7 Hemi
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Re: modern tech analysis 1965 426 Hemi
[Re: PJ68RT]
#1634351
06/16/14 02:20 PM
06/16/14 02:20 PM
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Joined: Jan 2003
Posts: 7,475
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,475
Minnesota
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Can someone please provide a summary? 
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: modern tech analysis 1965 426 Hemi
[Re: Hemi_Joel]
#1634352
06/16/14 02:28 PM
06/16/14 02:28 PM
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Joined: Jun 2006
Posts: 5,159
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,159
CT
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Quote:
It’s obvious that Chrysler engineers in the 1960s knew what they were doing and , as indicated, this wasn’t necessarily the case with their period peers.
Its not as efficient as some modern engines but the legend lives on. The ports flow well and have good filling capacity for the engine, they're pretty efficient, combustion efficiency isn't up to snuff with some modern engines but likely wasn't a concern at the time, the cam has slow ramps. They took a venture into analyzing the ports from a standpoint other than the flow rate at 28" of water, and tried to look at it from more practical standpoints of their capacity to fill the engine, which is good.
It seems that they didn't offer a true conclusion though?
Last edited by GTX MATT; 06/16/14 02:29 PM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: modern tech analysis 1965 426 Hemi
[Re: GTX MATT]
#1634353
06/16/14 02:48 PM
06/16/14 02:48 PM
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Joined: Jan 2003
Posts: 20,158
Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,158
Park Forest, IL
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I was more intrigued by the comparison between the 906 and LS-1 heads. Looks like Ma Mopar knew quite a lot back then. 
"Everybody funny, now you funny too."
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Re: modern tech analysis 1965 426 Hemi
[Re: 360view]
#1634355
06/16/14 10:53 PM
06/16/14 10:53 PM
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Joined: Jan 2007
Posts: 685
pennsylvania
poboyengineering
mopar
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mopar
Joined: Jan 2007
Posts: 685
pennsylvania
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there is a reason im not an engineer....
the old girl comes off pretty well considering it took what, 3 or 4 months of development to get it to Daytona? all in all, not too shabby for a 50 year old design vs the new stuff.
It may be ugly, but it sure is slow.
Girls comb their hair in rear view mirrors and the boys try to look so hard....
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Re: modern tech analysis 1965 426 Hemi
[Re: 360view]
#1634357
06/16/14 11:26 PM
06/16/14 11:26 PM
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Joined: Dec 2003
Posts: 22,695
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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I haven't read the entire article, but the first statistic they state is wrong, Mopar did NOT finish 1, 2,3, & 4 at the 1964 Daytona 500.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: modern tech analysis 1965 426 Hemi
[Re: 360view]
#1634358
06/17/14 12:51 AM
06/17/14 12:51 AM
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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Thanks for posting the link & even though its a technical read, it shows
ma mopar & the Hemi boys knew what they were doing. What I thought was really informative was how the Gen 3 dual plug design helps offset any deficiency in its swirl characteristics. Modern roller cam ramp design, dual plugs & 2.2 rod journal stroker kits makes the Elephant King Kong again...
Last edited by Triggerfish; 06/17/14 12:56 AM.
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Re: modern tech analysis 1965 426 Hemi
[Re: 360view]
#1634362
06/18/14 12:36 PM
06/18/14 12:36 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I had to do a lot of similar test when I was working at Chrysler and seen a lot of grafts of similar data.. but that was part of my job... back then it was a lot of fun when we could do R&D.. once Daimler took over that pretty much ended... as to what is meant by lab exhaust.. that depended on the test being run.. maybe a header but most were with manifolds with pipe extensions without muffs... if headers were to be run I ended up building most of them 
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