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Old 06-26-2013, 04:13 PM   #307
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Originally Posted by Bo White View Post
But I keep reminding them you will never see one making 500hp with just swapping cams lol.
When guys are running 11's with tuned, stalled, drag radial, automatics, it kinda makes cam swaps seem unecessary.
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Old 06-26-2013, 04:15 PM   #308
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It is endless and at the end of the day both are great motors with a ton of performance potential. Which is better is just a matter of what brand happens to be parked in your driveway on that given day.
And I wish I had one of each, small problem with that called money!
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Old 06-26-2013, 04:22 PM   #309
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Oh, and make mine a Synergy Green LS3 with white stripes.
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Old 06-26-2013, 06:15 PM   #310
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Originally Posted by 302-412 View Post
When guys are running 11's with tuned, stalled, drag radial, automatics, it kinda makes cam swaps seem unecessary.
L99's do this even though they start out with 400crank HP. I admit bolt on wise the GT is faster than a SS but you should have said 11.5 or faster Camaro vs Mustang. In any case the LS3 and even LS2 bolt on Vettes have run 10's. Makes no difference though because this is engine vs engine comparison and the cars they come in should have no meaning in this thread. Put both motors on the same engine dyno and the LS3 WILL make more HP and TQ.
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Old 06-26-2013, 09:22 PM   #311
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I doubt it, do you really think the drive train lose in the Camaro is that much higher than the Mustang, 30hp?????? GM's hp claims are supposed to be certified, why are the 5.7 Challengers closer stock in rear wheel hp to the LS3 than the LS3 is to the 5.0? Bolt on for bolt on it is no contest, the 5.0 will make more power than the LS3, it has been proven to run at 100% volumetric efficiency at many points on a full power curve. The heads out flow some of the Yates NASCAR heads, the information is out there, read it.
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Old 06-26-2013, 10:34 PM   #312
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I doubt it, do you really think the drive train lose in the Camaro is that much higher than the Mustang, 30hp?????? GM's hp claims are supposed to be certified, why are the 5.7 Challengers closer stock in rear wheel hp to the LS3 than the LS3 is to the 5.0? Bolt on for bolt on it is no contest, the 5.0 will make more power than the LS3, it has been proven to run at 100% volumetric efficiency at many points on a full power curve. The heads out flow some of the Yates NASCAR heads, the information is out there, read it.
You can doubt it all you want that doesnt make it true. Go put a IRS, 20 inch 32lb wheels and a 275/40R20 tire on your Mustang and see how much RWHP you loose. The power difference is in fact the drivetrain loss. I promise if you put them on the same engine dyno the LS3 will show more. Also does the Mustang even have a 1.1 trans ratio to measure RWHP correctly? The 5.0 will make more power bolt on for bolt on and there is no contest?????? Pshhhhhh. HA,HA,HA. LOL, LMFAO. Thanks for making me laugh there. WE gain 40RWHP from LT headers. The 5.0 only gains about 25RWHP. We gain a solid 10RWHP or more from a good CAI and while the 5.0 shows a gain with a CAI on the dyno with the hood up it has NEVER shown a gain at the track with a CAI. The only bolt on the 5.0 shows more is the tune. Around 25RWHP vs our 10RWHP there. The car is faster for various reasons but the engine DOES NOT make more HP and no where near the torque. The 4V Coyote heads flow monster air. Too bad Ford restricted them with a small bore and stroke. All that head flow means little NA when you dont have the displacement to use it.
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Old 06-26-2013, 11:01 PM   #313
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Well 302-412 I think I found the info that will put the nail into the coffin as to which engine produces more power stock and bolt on wise. MM and FF got a crate coyote to test upgrades with. They first tested the motor stock with usual bolt ons including ARH LT headers. That motor made 462HP 411TQ. GMHTP did one of there own test for camshaft compairisons. The stock LS3 crate engine with headers made 483 HP 471 TQ. I would give the link but am on my phone. THE LS3 MAKE MORE POWER. END DEBATE. Or are you going to make excuses for hard facts????????????
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Old 06-27-2013, 04:16 AM   #314
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My buddy bought a 2011 GT convertible at the same time as I bought my SS vert and he now regrets it. Why? The junk tranny is acting up and I am kicking his ass. It will cost him twice as much as me to make the same performance improvements.
Tune and mufflers I ran 12.50s@116. I don't see anything for the Mustang costing twice as much then for a Camaro.

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Originally Posted by VADER SS L99 View Post
Makes no difference though because this is engine vs engine comparison and the cars they come in should have no meaning in this thread. Put both motors on the same engine dyno and the LS3 WILL make more HP and TQ.
Agreed. Both engines are SAE rated at their respective power. Plus, Ford wouldn't under rate the 5.0 at 412hp when their main competitor sports 426+. I mentioned earlier, and you reiterated it, IRS, 20" wheels, and 275 series tires, plus heavier brake and drive train components in general all make up for a bit more drive train loss.
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Old 06-27-2013, 07:16 AM   #315
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The Ls3 crate engine comes with the GM hot cam + 50 hp over stock.

5th gear in the 6 speed manual is 1:1.
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Old 06-27-2013, 07:50 AM   #316
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Deki,

I know they are both SAE power rated but only GM lists theirs as "certified".
Also, again, why doesn't the Challenger R/T show as big a drive train loose as the Camaro, both IRS, 20" wheel and tire equipped.
Terminators with IRS were notorious for being underrated stock.
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Old 06-27-2013, 09:25 AM   #317
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Agreed. Both engines are SAE rated at their respective power. Plus, Ford wouldn't under rate the 5.0 at 412hp when their main competitor sports 426+. I mentioned earlier, and you reiterated it, IRS, 20" wheels, and 275 series tires, plus heavier brake and drive train components in general all make up for a bit more drive train loss.
Keep in mind also that Ford did change the ratings for the latest 5.0 liter. The advertised horsepower is now 420 with the use of premium fuel.
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Old 06-27-2013, 09:26 AM   #318
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The Ls3 crate engine comes with the GM hot cam + 50 hp over stock.
I was just going to say that.
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Old 06-27-2013, 09:52 AM   #319
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Thanx Cody, not quite apples to apples. Although I do realize the GM hot cam is far from the best for a basically stock LS3.
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Old 06-27-2013, 10:47 AM   #320
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Thanx Cody, not quite apples to apples. Although I do realize the GM hot cam is far from the best for a basically stock LS3.
It's still worth mentioning when someone's acting like a stock LS3 had 480hp.
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Old 06-27-2013, 10:50 AM   #321
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Vader, tried to slip me a GM Hot Cam, Cheeky Bugger!
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Old 06-27-2013, 12:54 PM   #322
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Can't go wrong with either. But if someone was going to build a car and the only engine options were LS3 or Coyote 5.0 it would be hard to pass up the LS3 for cost, power, abundant aftermarket and external dimensions.
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Old 06-27-2013, 12:55 PM   #323
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Bolt on for bolt on it is no contest, the 5.0 will make more power than the LS3
No wonder this thread is endless. You keep spouting absolute BS. The above statement is laughable. Simple physics should tell you that on no planet that we know of will a 5 litre engine ever be able to make more power than a 6.2.


One rule of thumb in the racing world. "There is no replacement for displacement".
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