pontiac claims 350 horse i read actual is 290 - Pontiac GTO Forum
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post #1 of 12 (permalink) Old 09-18-2004, 09:12 AM Thread Starter
 
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pontiac claims 350 horse i read actual is 290

i was on a website where they dynoed the gto at 290 hp and that the cobra is destroying these cars by 10 lengths or so anyone know what is the true hp of the gto?
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post #2 of 12 (permalink) Old 09-18-2004, 09:24 AM Thread Starter
 
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found some info

'04 GTO 5.7 LS1
Our '04 GTO test car would rev freely to its 6,000 rpm redline. As you'll see in the dyno chart, maximum horsepower was made at approximately 5,700 rpm and max torque checked in at 4,300 rpm. The best pull of 3 resulted in 297.38 hp with 314.58 ft-lb of torque. Other runs were close at 293.74 hp and 294.61 hp. If you use the rule of thumb that power to the rear wheels is 15 to 20 percent less than net hp at the flywheel, the reading would have been 280-297.5 hp based on the 350hp rating. So the GTO is right there. whatever all this means lol im not a technical guy with all this stuff
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post #3 of 12 (permalink) Old 09-18-2004, 10:52 AM
 
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The last poster is correct...my car was dynoed by the dealership before I bought it and the numbers are right in line with the above.
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post #4 of 12 (permalink) Old 09-18-2004, 01:16 PM
 
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I think what you are confusing is crankshaft HP and rear wheel HP. Pontiac claims 350hp at the crank, and the cars are measuring around 290 at "the wheels". A 17% drivetrain loss is definatley in the ball park.
Don't know about ten car lengths though. Maybee the driver of the 6-speed Goat only had one arm?
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post #5 of 12 (permalink) Old 09-18-2004, 10:58 PM
 
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Quote:
Originally Posted by BLUSHIRT35
'04 GTO 5.7 LS1
Our '04 GTO test car would rev freely to its 6,000 rpm redline. As you'll see in the dyno chart, maximum horsepower was made at approximately 5,700 rpm and max torque checked in at 4,300 rpm. The best pull of 3 resulted in 297.38 hp with 314.58 ft-lb of torque. Other runs were close at 293.74 hp and 294.61 hp. If you use the rule of thumb that power to the rear wheels is 15 to 20 percent less than net hp at the flywheel, the reading would have been 280-297.5 hp based on the 350hp rating. So the GTO is right there. whatever all this means lol im not a technical guy with all this stuff

That sounds right... all C5 autos dyno around that... MN6s should be around 305 - 320 rwhp with similar torque... a very strong car
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post #6 of 12 (permalink) Old 09-19-2004, 06:05 AM Thread Starter
 
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but i guess

we can beat most of the rice burners out there but the mustang cobra and the mach 1 ford has will do us in correct?
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post #7 of 12 (permalink) Old 09-21-2004, 07:42 PM
 
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cobras... will beat us

mach 1's.... We will beat them out by a car length or two
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post #8 of 12 (permalink) Old 09-22-2004, 01:25 PM
 
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Quote:
Originally Posted by Redline
cobras... will beat us

mach 1's.... We will beat them out by a car length or two
Hey all just bought a 04 GTO. I use to own an 03 Cobra and an 03 Mach 1.
You guys are right about the Cobra destroying the GTO. But I only paid 26k and some change for the GTO. Over 4k Less than the cobra plus i got the incentive rate. Anyways the deal on the Cobra went bad, only had thecobra a week. So i ended up with the mach 1. The mach 1 puts dang near to the wheels as our GTO's do. They are quite underated and can run low 13's bone stock. I should know becuase i have done it. And their are some mach 1
s that are 12 second factory freaks. On an avg the machs run mid 13's. And from what i have been reading some of you guys having a hard time gettin in the 13's. The mach 1 will beat us off the line "solid rear axle". Its after the 1/8th were we may catch up. I beat 2 lightly modded ws6's withmy mostlystock mach 1. And a ws6 is a tad quicker than our cars.
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post #9 of 12 (permalink) Old 09-22-2004, 02:52 PM
 
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I have a fairly close friend with a Mach 1 and he agreed to do a couple runs on the next track night. I guess we will so how well we can drive each others car down the 1/4 mile
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post #10 of 12 (permalink) Old 09-22-2004, 03:36 PM
 
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Solid rear axles are great for pickup trucks and Connestoga wagons. Real cars that can actually turn and stuff have indy rear suspension.
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