Re: ported edelbrocks on stock magnum shortblock
[Re: ptowntsi]
#491575
10/08/09 12:52 PM
10/08/09 12:52 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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read this article by dulcich I'd say it's worth it.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: ported edelbrocks on stock magnum shortblock
[Re: ptowntsi]
#491578
10/09/09 07:05 AM
10/09/09 07:05 AM
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Joined: Jan 2003
Posts: 4,558
Montana
FuryUs
master
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master
Joined: Jan 2003
Posts: 4,558
Montana
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Quote:
my grand cherokee, which has a hotter pcm than a stock ram/dakota/van was rated at 245hp/345lb ft, they added 74hp and 79lb ft by just putting on a dual plane M1, 750cfm carb, and 1 3/4" headers...??? sure that dyno is even correct?
The crate engine, basically your GC or my Durango mill but with a dual plane intake, is rated at 300. They put a 750 carb, MSD distributor, and headers, and got 320. So maybe their dyno is a little generous (20 hp or about 6%) but not as much as you're suggesting. The limiting factors on the Magnum are the PCM, intake, cam, and then heads. They addressed all those shortcomings, so of course it's going to make a significant difference.
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Re: ported edelbrocks on stock magnum shortblock
[Re: FuryUs]
#491579
10/09/09 08:13 AM
10/09/09 08:13 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
my grand cherokee, which has a hotter pcm than a stock ram/dakota/van was rated at 245hp/345lb ft, they added 74hp and 79lb ft by just putting on a dual plane M1, 750cfm carb, and 1 3/4" headers...??? sure that dyno is even correct?
The crate engine, basically your GC or my Durango mill but with a dual plane intake, is rated at 300. They put a 750 carb, MSD distributor, and headers, and got 320. So maybe their dyno is a little generous (20 hp or about 6%) but not as much as you're suggesting. The limiting factors on the Magnum are the PCM, intake, cam, and then heads. They addressed all those shortcomings, so of course it's going to make a significant difference.
 another thing to realize, your 245HP is SAE net, with all accessories (fan, alternator, PS pump, a/c compressor), full intake tract, and full exhaust on it. when you dyno an engine at a shop, typically the numbers are SAE gross flywheel HP.
compare say, the 440 4bbl. in '71, rated at 375HP gross, in 72, the same engine (IIRC w/o any real changes) was rated at 280HP net.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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