Vortec 8100 power drop?
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Joined: Oct 2003
Posts: 1,647
From: Jupiter, FL
Originally posted by Z28x
The '04 truck is 330 hp @ 4,200 rpm and 450 ft-lbs of torque @ 3,200 rpm
the 5.3L is only 35HP less at 295HP
I wonder were the lost came from and were the gain in the 5.3L and 4.8L came from?
The '04 truck is 330 hp @ 4,200 rpm and 450 ft-lbs of torque @ 3,200 rpm
the 5.3L is only 35HP less at 295HP
I wonder were the lost came from and were the gain in the 5.3L and 4.8L came from?
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Joined: Jan 2000
Posts: 10,285
From: Albany, NY
Originally posted by ImportedRoomate
Chevy's site has the 8100 at 320hp 440 ft-lbs
Chevy's site has the 8100 at 320hp 440 ft-lbs
GMC is 330HP too , but Yukon XL 3/4 Ton is 320HP for the 8.1L and 325HP for the 6.0L.
I know the Big Block is all about torque, but it should still have more HP than the 2.1 liter smaller 6.0L V8
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Joined: Jul 2001
Posts: 3,132
From: Santa Clara, CA
Usually when an engine loses power from one year to the next, it's due to emission control changes. I would guess that the new 8100s have a larger, more restrictive catalytic converter, but it could also be camshaft changes.
On a similar note, several California engines make less power than their 49 (really about 45 these days) state counterparts.
On a similar note, several California engines make less power than their 49 (really about 45 these days) state counterparts.
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Chris Anderson
LT1 Based Engine Tech
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Jan 27, 2015 08:30 AM
