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Difference btw GTO and Vette LS1

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Old Jan 27, 2010 | 11:33 PM
  #1  
mjollnir's Avatar
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Post Difference btw GTO and Vette LS1

How do you explain the power/torque diff from these same engines?

Different camshafts or intakes?

rgds,
Ben


04 gto:

350 hp
495 Nm (pas bon)
2004 Pontiac GTO Performance

- 5,665 cc 5.7 liters V 8 front engine with 99 mm bore, 92 mm stroke, 10.1 compression ratio, overhead valve and two valves per cylinder LS1
- Premium unleaded fuel 91
- Fuel economy EPA highway (mpg): 21 and EPA city (mpg): 16
- Multi-point injection fuel system
-
18.5 gallon main premium unleaded fuel tank
- Power: 261 kW , 350 HP SAE @ 5,200 rpm; 365 ft lb , 495 Nm @ 4,000 rpm



00 vette:
345 hp
475 Nm

2000 Chevrolet Corvette Performance

- 5,665 cc 5.7 liters 8 V front engine with 99 mm bore, 92 mm stroke, 10.1 compression ratio, overhead valve and two valves per cylinder
- Premium unleaded fuel
- Fuel economy EPA highway (l/100km): 8.4
- Multi-point injection fuel system
- Main 72 liter premium unleaded fuel tank
- Power: SAE and 257 kW , 345 HP @ 5,600 rpm; 350 ft lb , 475 Nm @ 4,400 rpm
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Old Jan 28, 2010 | 01:41 AM
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Camshafts,

are all but identical.
Vette GM tuned, GTO Holden tuned.
Side by side the tunes are quite different.

Though installation differences too (intake and exhaust).
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Old Jan 28, 2010 | 02:27 AM
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GM ratings
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Old Jan 28, 2010 | 12:46 PM
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Well for one thing your comparing an early LS1 (pre `01) to the last LS1.
It's pretty common knowlede that all LS1's from `01 -04 are identical save for differences of oilpans and intake /exhaust tracks. The `00 Vette engine has a different cam and an LS1 intake, where as the `04 has the LS6 intake.
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Old Jan 28, 2010 | 03:01 PM
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...and about 500 lbs.!
I've got both...
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Old Jan 29, 2010 | 12:44 AM
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Originally Posted by chopperloco
...and about 500 lbs.!
I've got both...
Yer not wrong! ~1470 and ~1695kg.
Plus the gearing difference.
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