5hp for 2001-2004???
Thread Starter
Racer
Joined: Nov 2006
Posts: 302
Likes: 0
From: Minnesota
5hp for 2001-2004???
Hey guys, this is probably a basic question, but what makes the 5 hp difference from 2000 to 2001 C5's?
Second...can that difference be made up in a simple part to install?
Second...can that difference be made up in a simple part to install?
Le Mans Master
Joined: Oct 2002
Posts: 6,772
Likes: 1
From: Tampa FL
number of differences in the 01-04 verses the 97-00 engines .. cam, intake, tb, injectors ..
it's really nothign to worry about 5hp is barely noticable.
and yeh an air filter would prolly net you the 5 hp if you're that concerned about it.
it's really nothign to worry about 5hp is barely noticable.
and yeh an air filter would prolly net you the 5 hp if you're that concerned about it.
Burning Brakes
Joined: Mar 2006
Posts: 826
Likes: 0
From: Iowa City Iowa
Simple answer is different intake manifold. The Z06 was made in 01 and it came with a LS6 engine which is shared by the same block with LS1. So they started putting the more free flowing LS6 intake manifold on all LS1's and it made approxmitely 5hp. You see more gains switching over to it if you have after market heads or cams. Little gain is seen on stock internals.
Hope that helped
.
Hope that helped
.
Thread Starter
Racer
Joined: Nov 2006
Posts: 302
Likes: 0
From: Minnesota
Simple answer is different intake manifold. The Z06 was made in 01 and it came with a LS6 engine which is shared by the same block with LS1. So they started putting the more free flowing LS6 intake manifold on all LS1's and it made approxmitely 5hp. You see more gains switching over to it if you have after market heads or cams. Little gain is seen on stock internals.
Hope that helped.
Hope that helped
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I believe that the torque increase was the primary reason the '01 and up C5s are a bit quicker.
Burning Brakes
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Melting Slicks
Joined: Feb 2006
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From: Des Moines Iowa
On the negative side, the 01 and later C5s had the addition of the pre, or "pup" catelitic convertors added, as well as a smaller camshaft than the 2000, which had the largest lift and duration of all LS1 camshafts. (Only the 2000 C5s bound for east or west coast delivery, had the addition of the pre or "pup" cats in 2000.) Engineers at GM estimated that the pre/pup cats reduced hp by about 5hp, so it's safe to assume the addition of the LS6 intake manifold and the larger MAF, resulted in an addition of 10 hp, and the corresponding increase in torque numbers also noted.
If you follow all of this, it also means that the 2000 C5s not eqipped with the pre/pup cats, but which included the larger camshaft, have a hp output closer to 350 than the advertised 345.