Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2026562
03/07/16 04:12 PM
03/07/16 04:12 PM
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Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
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One reason for number 2 to detonate first is the fuel is hottest in that cylinder because it is the last one fed off the rail that fuel gets heated fastest, perhaps I should add a return style rail off an earlier magnum to keep the fuel cooler and further reduce detonation that way, that would tollerate a little more compression that way also. I think I have mentioned before the front cylinders look the worst on tear downs normally.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2026634
03/07/16 06:02 PM
03/07/16 06:02 PM
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Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
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They don't seem to look as bad inside as you would expect with all the rattling that they do but yes they seem to be worst front to back.
I have often looked at the factory PR ufo thingys and wondered if there wasn't some way to bump up pressure a little. Let me know if you come up with something.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2027042
03/08/16 04:05 AM
03/08/16 04:05 AM
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Joined: Jan 2010
Posts: 679 Los Osos, Ca
CKessel
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mopar
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Los Osos, Ca
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I had a 94 1500 2X shortbed with a 5.9 that I could knock down almost 21mpg with. This was with the MP PCM [had to run premium for it], 1st design F&B throttle body, 1.7 ratio Crower rockers [way cheaper than a cam, more performance for the money too], 340 timing gears, MP [Mike Leach] headers, MP cat back, V10 cat[ cheaper than v8 & had bigger inlet and outlets], K&N FIPK, Trans Go shift kit, modded TPS, additional fuel pressure, Ford Motorsports 24lb 4 hole injectors[ better spray pattern and less expensive than many others. got this tip from mp hotline of all places], un-altered intake manifold, 3.55 gears, p275-60r16 tires[ like indy truck], 180* t-stat. We also had a 99 Durango 2X that was lucky to do 13 on the flats. Fuel sucking pig. Wish I had done some work on that but that was my wife's car and I had to watch how much I changed it. Only had the MP cat back and the FIPK.
Carl Kessel
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2027275
03/08/16 04:29 PM
03/08/16 04:29 PM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
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Posts: 8,162
USA
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Hot from the presses: Begin quote Credit, in part, its engine – a direct descendant of the celebrated Pentastar V-6, named three times to the prestigious list of Ward's 10 Best. The redesigned 3.6-liter V-6 in the gas-powered Pacifica features two-step variable-valve lift (VVL), cooled exhaust-gas recirculation (EGR) and innovative engine-weight reductions that boost the engine's efficiency and performance – all while preserving the smoothness that remains a hallmark of the Pentastar bran End quote From http://www.theautochannel.com/news/2016/...assed-fuel.html
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2027858
03/09/16 02:43 PM
03/09/16 02:43 PM
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Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
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You want cooled EGR pull it from after the cat as far back as possible, there will be less carbon pulling it after the cat also. As for me I won't be putting EGR on anything I own, one more system to fail and I am not convinced it helps MPG, everything I have ever removed it from (for test purposes of course) got better MPG without it. My experimenting seems to show that speeding up the burn always helps and EGR slows it down.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2028450
03/10/16 12:21 PM
03/10/16 12:21 PM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2028530
03/10/16 02:14 PM
03/10/16 02:14 PM
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Joined: Jan 2010
Posts: 679 Los Osos, Ca
CKessel
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Los Osos, Ca
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If I remember correctly, the MP headers were tri y. Its been a long time since I've seen any so I could be mistaken. I do remember that the v10 cat didn't need any bells for the inlet to size it up to the headers like the v8 unit did plus the outlet was already 3" too. When I was working at the dealer I saw the two cats side by side and went, hey! those things are copies of each other on the layout and bends just different size on the pipes.
Carl Kessel
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2030150
03/13/16 10:29 AM
03/13/16 10:29 AM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
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Posts: 8,162
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Dave, is this the 5.2 cam that you intend to use? http://dodgeram.org/tech/gas/specs/valve-5_2.htmThe 318 Magnum cam seems to be approximately Intake 115 degrees centerline ATDC 192 degrees duration at 0.050 lift Exhaust 108 degrees centerline BTDC 207 degrees duration at 0.050 lift If you intall it with the "advertised" lift event degrees as in the web link above The EA 3.2 program says its is approximately at the 3.5 degrees retard Setting I have playing around with the EA 3.2 engine simulation computer program on a 11.95 static compression ratio (dynanic CR = 9.6) Estimated cranking compression 260 psi ( ! ) 0.026 tight quench Magnum 5.9V8 running AKI 93 gasoline at 2,950 feet above sea level like in Kalispell, with the only hardware changes so far a 170 degree thermostat and 52 inch long primaries 4 into 1 headers of 1.375 inch internal diameter. So far there is a 11% improvement in fuel economy at 12.8 air/fuel ratio full throttle at nearly every rpm point from 1600 to 5200. Predicted non pinging ignition timing is within four degrees of stock at wide open throttle, so maybe this TSB And setting the new option to -4 would allow the OEM pcm software to work without a custom flash http://dodgeram.info/tsb/1998/18-24-98.htmNotice it allows an adjustable 2 or 4 degrees of retard
Last edited by 360view; 03/14/16 10:29 PM.
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Re: Super duper MPG 5.9 magnum
[Re: HotRodDave]
#2031063
03/14/16 05:36 PM
03/14/16 05:36 PM
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Joined: Jan 2005
Posts: 12,478 Kalispell Mt.
HotRodDave
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I should be under 11 to 1 on this magnum. That cam info is about useless with out knowing the lift the duration was checked at or the .050 numbers, heck I don't even see lift specs there. I think they changed the specs when they ditched the EGR.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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