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What kind of Horse Power is my C5 putting out???

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Old 09-15-2004, 07:12 PM
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LiquidDI
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Default What kind of Horse Power is my C5 putting out???

I have a 2000 C5 with a M6, corsa x-pipe, and a corsa indy exhaust. What kind of rear wheel power am I putting out? Also, if I added an aftermarket air lid what would I be looking at? thanks!
Old 09-15-2004, 07:16 PM
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Monster231
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probably just over 300 to the wheels. I ve read of as low as 280" all the way up to 315 with just intake and exhaust
Old 09-15-2004, 07:19 PM
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really!? That's not even the 345 that is claimed from GM.
Old 09-15-2004, 07:21 PM
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Originally Posted by LiquidDI
really!? That's not even the 345 that is claimed from GM.
345 is at the flywheel.
Bob
Old 09-15-2004, 07:24 PM
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I know, but if it's only putting out 300 to the rear wheels with the corsa nad x pipe then that means it's only putting out 290 stock. That's only around 330HP.
Old 09-15-2004, 08:01 PM
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Originally Posted by LiquidDI
I know, but if it's only putting out 300 to the rear wheels with the corsa nad x pipe then that means it's only putting out 290 stock. That's only around 330HP.
You are driving a STOCK car. Muffler and X pipe do nothing for horsepower. You are also not taking into consideration the 15% driveline loss do to the automatic transmission.
Old 09-15-2004, 10:07 PM
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Originally Posted by 16Again
You are driving a STOCK car. Muffler and X pipe do nothing for horsepower. You are also not taking into consideration the 15% driveline loss do to the automatic transmission.

What are you talking about? I have a manual and if the muffler is as loud as it is now then there must be some extra HP free'd up with the exhaust and X pipe. P.S I am taking into consideration the drive line loss. 290 +15% = around 330hp. that is not close to the claimed 345 by GM. See what I'm saying?
Old 09-15-2004, 10:14 PM
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Originally Posted by LiquidDI
I have a 2000 C5 with a M6, corsa x-pipe, and a corsa indy exhaust. What kind of rear wheel power am I putting out?
My Y2K M6 dynoed 302.5 rwhp on a Mustang ( a very stingy one at that ) dyno with a Blackwing intake, LS6 intake manifold, and Flowmaster muffs.

Cheers,

Mark
Old 09-15-2004, 10:24 PM
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Capt.RobC5
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345 at the flywheel = approx 295 at the rear wheels maybe 300 with the M6. Don't take our word for it, do some mod's and do a before and after dyno-tune. All the mods you do are great but are exponentially enhanced by a good dyno-tune. Mine will be done in two weeks with Corsa Indy, X-pipe, Blackwing ,160 thermo, coolant by-pass, and oh yeah, no cats. o2 sims. Where will I be?????
Old 09-15-2004, 10:39 PM
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Originally Posted by LiquidDI
What are you talking about? I have a manual and if the muffler is as loud as it is now then there must be some extra HP free'd up with the exhaust and X pipe. P.S I am taking into consideration the drive line loss. 290 +15% = around 330hp. that is not close to the claimed 345 by GM. See what I'm saying?
Is that the new math? 345 HP at the fly wheel with a 15% loss = 293.25 RWHP. 330 HP at the fly wheel with a 15% loss = 280.5 RWHP
Old 09-15-2004, 10:40 PM
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all of it :lol
Old 09-15-2004, 10:51 PM
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I would think that you are pulling down somewhere between 295-305 hp. Best way to find out is get a dyno session and see what it shows.
Old 09-15-2004, 10:51 PM
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JJ in FL
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Originally Posted by LiquidDI
290 +15% = around 330hp. that is not close to the claimed 345 by GM. See what I'm saying?
You cant do it that way. 15% of 290 is not the same as 15% of 345.
Old 09-15-2004, 10:53 PM
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Originally Posted by JJ in FL
You cant do it that way. 15% of 290 is not the same as 15% of 345.

gotcha! So 302 ish would be around 355ish to the fly wheel. I need to get mine dyno'd. anyone know where to get one dyno'd in the St. Louis area????
Old 09-16-2004, 12:36 AM
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With just an intake and exhaust I dyoned 315 to the rear wheels and 327 ft lb of torque. That's about 380/395. You should be around 305/315.

Also I thought it was 17% loss not 15%, someone correct me...
Old 09-16-2004, 12:57 AM
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Originally Posted by LiquidDI
gotcha! So 302 ish would be around 355ish to the fly wheel. I need to get mine dyno'd. anyone know where to get one dyno'd in the St. Louis area????

Stiegemeier ... in St. Charles has a Dyno... 636 949 -2275
My 99 with Blackwing and Corsa Indy's 316hp and 323tq....
Old 09-16-2004, 06:20 AM
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Dyno actual results... stock, 303 rwhp... after below mods, 336 rwhp.
Old 09-16-2004, 07:33 AM
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My 99 MN6 with the exact same mods came in at 292 RWHP. I had many club buddies with 99-00 with similar mods also in the 292 - 298 RWHP range. We had one freak that on the same day and same dyno put out 321 RWHP. So there can be a 15 to 20 HP difference between cars.

Tom

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