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Anyone Know Why The 5.9 Magnums Make So Much Less Power Than The 5.7 Vortec?

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Old Apr 26, 2021 | 05:58 PM
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The Dart has everything on BUS, including the horn... if the computer is busy doing “critical” engine stuff the horn gets pushed back in the queue of stuff to do, so if you jump on the button in an emergency to warn someone, you might be lucky to get a noise out of it 5seconds later... potentially way too late.
 
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Old Apr 26, 2021 | 07:06 PM
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Originally Posted by Spillage
The Dart has everything on BUS, including the horn... if the computer is busy doing “critical” engine stuff the horn gets pushed back in the queue of stuff to do, so if you jump on the button in an emergency to warn someone, you might be lucky to get a noise out of it 5seconds later... potentially way too late.
Asinine...just asinine.

I feel bad for all the poor people who are going to end up with these modern cars as their daily drivers when they are 15, 20, 25 years old.
 
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Old Apr 26, 2021 | 07:15 PM
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Originally Posted by Skeptic68W
Asinine...just asinine.

I feel bad for all the poor people who are going to end up with these modern cars as their daily drivers when they are 15, 20, 25 years old.
What makes you think they are going to last that long?
 
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Old Apr 30, 2021 | 01:20 PM
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Had an interesting experience today. Since I sold my charger I've been looking for a cheap backup vehicle. Went to a local used dealer and drove a couple GMT800 tahoes. One with the 5.3 and the other with the 6 liter. This is the first iteration of the LS engines. I actually had a Camaro with an LS in it about a decade ago, and that this was real quick. The 5.3 and the 6.0 though...honestly kinda gutless turds in my opinion. I got back in my Ram to leave the dealer and matted the throttle on the little side street where I had just done so in the 6.0 Tahoe and honestly the ol' 5.9 felt quite a bit stronger! That being said, my truck hsa 4.10 gears and is well maintained, while there tahoes I'm sure had economy gears and both were kinda rough...but still.

Now don't get me wrong, I'm sure that 6.0 would eat the 5.9 in an all out drag race, but the power is not immediately available. It's up in the top of the RPM band. The LS heads flow really well, and the intake/cam profiles must be biased a bit towards higher RPM power because the 6.0 barely even chirped the tires from a stop. They really act like opposite engines. The 5.9 has a lot of immediate torque, but runs out of breathe very quickly. The LS is soft downstairs, but really wakes up and starts to pull once the revs start climbing.

I still think the 5.7 vortecs feel stronger than the magnums, but today really did give me back a little bit of appreciation for the small block mopar.
 
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Old May 2, 2021 | 02:08 AM
  #25  
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There is quite a bit of variance in the LS motors depending on how they were maintained. My dad's 03 2500hd feels like a freight train yet at 215k but I have driven many that were the same truck but total dogs at half the mileage. You can say the same thing about the magnums though. You get one with wore out sensors and a blown plenum won't feel nearly as snappy as one with great functioning sensors and no plenum/vacuum issues.
 
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Old May 5, 2021 | 10:23 AM
  #26  
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Originally Posted by Skeptic68W
Had an interesting experience today. Since I sold my charger I've been looking for a cheap backup vehicle. Went to a local used dealer and drove a couple GMT800 tahoes. One with the 5.3 and the other with the 6 liter. This is the first iteration of the LS engines. I actually had a Camaro with an LS in it about a decade ago, and that this was real quick. The 5.3 and the 6.0 though...honestly kinda gutless turds in my opinion. I got back in my Ram to leave the dealer and matted the throttle on the little side street where I had just done so in the 6.0 Tahoe and honestly the ol' 5.9 felt quite a bit stronger! That being said, my truck hsa 4.10 gears and is well maintained, while there tahoes I'm sure had economy gears and both were kinda rough...but still.

Now don't get me wrong, I'm sure that 6.0 would eat the 5.9 in an all out drag race, but the power is not immediately available. It's up in the top of the RPM band. The LS heads flow really well, and the intake/cam profiles must be biased a bit towards higher RPM power because the 6.0 barely even chirped the tires from a stop. They really act like opposite engines. The 5.9 has a lot of immediate torque, but runs out of breathe very quickly. The LS is soft downstairs, but really wakes up and starts to pull once the revs start climbing.

I still think the 5.7 vortecs feel stronger than the magnums, but today really did give me back a little bit of appreciation for the small block mopar.
Not all LS engines are gut less turds. The newer 5.3 and the 6L80E transmission works pretty good, I had a few of them. Lots of cheaper aftermarket parts available for the LS. The computer on the magnum is the enemy for making power. You could just remove the magnum efi/distributor crap and run a carb. I did that with a bunch of 70-80's dodgies over the years.

Been impressed with the new hemi 5.7, as it seems to be one heck of an engine stock, I just hope it lasts. Makes me worried on how fast the hemi engine leave the wreckers. LS engines sit around while hemis are sold off in days. Too bad that the hemi was a bunch cheaper.
 
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Old May 5, 2021 | 12:38 PM
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Mainly because the LS engines got stuffed into EVERYTHING. They are everywhere. Just like the older chevy small blocks.
 
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Old May 17, 2021 | 11:19 PM
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Originally Posted by Skeptic68W
Man, I couldn't agree with you more on your rant there.

Here's how I see things.

I don't want to be like everyone else, living their lives on the treadmill of car payments. If you are married and both you and your wife drive relatively new cars, you could easily be spending $1000+ per month by the time you factor in insurance costs and all that. For the average person making a median income, that's absolutely stupid, and can significantly hurt your ability to achieve financial freedom, retire, or merely have choices. Maybe your wife wants to stay home and raise kids, and that thousand dollars a month is the difference between her being able to or not. I don't want my vehicles to have that kind of power over me. So I buy vehicles and keep them indefinitely, doing what is necessary to keep them not just roadworthy, but nice and enjoyable to use.

If you are not mechanically inclined...too bad. You're screwed anyway. Have fun on the treadmill.

However, if you are a halfway functional mechanic like us, that gives us a choice. I can either buy modern vehicles that I can't fix (or can't fix for long...imagine trying to get some of these esoteric electronics in 20 years), or I can assemble a fleet of older vehicles that I know I can maintain almost indefinitely. For me, this is clearly the better choice. The cars don't cost much on initial purchase because they are 20 years old, parts are cheap, they're easy to fix, and they are new enough to be reliable and reasonable safe (fuel injection, crumple zones, and airbags, etc). The idea of owning a fleet of modern vehicles makes me cringe. I see them as an utter liability if you live like me. Take radar guided cruise control for example. If you have F-U money and can buy a new or nearly new car every few years, you likely love this technology. It makes long freeway trips much more relaxing. However, radar cruise require crash mitigation, and do you really want to be driving around in a 20 or 30 year old vehicle that has the ability to panic brake itself? Everything electronic will eventually start acting up, and the last thing I need is to be cruising along at 80mph on the freeway and suddenly a sensor fails and locks the brakes up causing a major crash. I don't want my car to have that ability.

I had a 2014 Charger for about a year. It was throttle by wire, and that thing almost got my killed once. I was pulling out of an alley onto a busy road and the way the cars were parked you couldn't see traffic coming further than about 15-20 feet. So I start out into the intersection and as soon as I pass the parked car I see an SUV barreling down on my at probably ~50. So naturally I stand on the go pedal and the hemi leaps to life.......but then the ****ing stability control panics and shuts the throttle on me! Just shut it completely. Damn nannies (which aren't even defeatable). Anyway, fortunately it recovered and re-opened the throttle a moment later and I narrowly got out of the way of that SUV. Either way, I was pissed, and there is no way I am giving that much control to a computer again. Charger got sold (not just for this reason).

My plan going forward is this. Any time I need a new vehicle. I will drive down to Texas or Arizona or somewhere where rust isn't an issue and buy what I'm looking for down there. Late 90's to mid 2000's vintage American stuff will make up my entire fleet, with the exception of 1 classic Mopar project I'd like to do with the old man soon.
my thoughts exactly.

I can't personally add much to the convo, the only two chevy vehicles I've ever owned have been quite messed up in their own ways, a 1992 chevy 454 2500 with a blown head gasket that I had absolutely no money to fix back in the day out of high school and 1992 firebird 5.0 that never quite ran right no matter what I fixed on it, that wasn't the end of the world unto itself, however, a parasitic draw gremlin was so it's sat in project status in storage for awhile. I'd sooner ride a bike and put the money for a 100k new truck into getting a house lol. I wouldn't mind a 3rd gen ram eventually in good condition, if nothing else them having chip security in the key and being modern while also not costing a fortune like newer trucks do. I know technically anything can be stolen by a sophisticated enough thief but it would cut out the lowest common denominator stuff. There's a reason my 2nd gen old ram was stolen and used in a robbery and not the new 2020 ford f250 that was parked next to it with probably 100x the power and torque as my worn out high mileage truck, maybe they could have actually ripped the atm out of the ground with it, while they were unsuccessful using my truck lol. The newer vehicles parked out here actually have chip security unlike my truck.

I did find the convo quite informative for what it was worth too. My dad always seemed to hold the 88-98 chevy's in high regard, but he settled on a 98 ext. cab ram he got on a good deal back in the day, people around here charge a lot considering how old they are for good running and driving 90's chevy trucks. Who knows what the future may hold, I certainly wouldn't turn an extended cab 90s chevy truck down for the right price, I heard some say the spider injection used in the last few years of those models can have problems, meanwhile TBI is considered pretty stone cold reliable.
 
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Old May 27, 2021 | 09:42 PM
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The 5.7 GM engine also gets considerably better fuel mileage. I bought my ‘97 Ram 5.9 brand new, and a bunch of co-workers had new GMs and we’d drive all over the country together (nomad construction workers at the time), and the GMs would blow me away with power, and fuel mileage. I still have my Ram and it’s all original. The Chevy guys have had 6 or 7 trucks since then...
 
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