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11-09-2011, 10:10 AM #1
- Join Date
- Nov 2010
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- Rhode Island
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- 8
Black- 2002 Camaro Z28
Question about the +5 Stock Horsepower in 2001
Hello all,
I am considering purchasing a 99 Trans Am and my question is "What is it exactly that gives the Trans Am/Camaro 5 more horsepower in the year 2001, and is it a mod that I can easily do myself to upgrade a 99 LS1?
Thank you in advance
-James
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11-09-2011, 10:19 AM #2
LS6 intake is the only real hp difference in the cars you posted. Which gives a little more than 5hp. On most upgrades when we dyno before (baseline) and after a LS6 intake over the LS1 intake it is around 9 hp on a lid only car.
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11-09-2011, 10:19 AM #3
- Join Date
- Jun 2011
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- Branchville, NJ
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- 3,111
Silver & Blue- 02 Camaro SS, 04 GTO
If you have ever seen a dyno sheet you can see the HP and TQ numbers change with each and every RPM. They probably rated one year at 4500 rpm and the next year at 4550 rpm. I do not think they changed any parts to gain the 5 hp. If I am wrong please let me know.
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11-09-2011, 10:21 AM #4
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- Feb 2009
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- Florida Man Status Acheivement
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- 11,766
Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
I'd normally say welcome but I see you've been here for a while, just not posting.
You need to read this thread, it will let you know the differences between the yrs.
http://www.ls1.com/forums/f6/differe...y-years-27512/
The Hp numbers that were put out by GM were deliberately under rated because GM didn't want it to hurt their Corvette sales during those yrs. Many articles on the web about this subject.
The differences that I think you are looking for are in the thread above.
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11-09-2011, 10:23 AM #5
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Navy Blue Metallic- 98 T/A w/ mods, 00 FBVert
Now if your looking at the 2 cars and trying to figure out which one to get, I myself would favor the 01 over the 99. but that depends on the condition of the cars.
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11-09-2011, 10:53 AM #6
- Join Date
- Nov 2010
- Location
- Rhode Island
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- 8
Black- 2002 Camaro Z28
Cars for Sale: 1999 Pontiac Firebird Trans Am in Cumberland, RI 02864: Coupe Details - 307409231 - AutoTrader.com
Here is the link for the car. You can see how it has the ram air hood, does that necessarilly mean that it is a WS6?
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11-10-2011, 03:29 AM #7
- Join Date
- Aug 2011
- Location
- Browns Mills NJ
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- 190
Green- 1995 Z28 w/ LS1 Swap
I would get a 99 up...intake is a pretty simple mod to make up the 01-02 differance...but any year LS1 is fine...
Heads/Cam/Intake/Stall.
404 Rwhp uncorrected @ 6400
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11-10-2011, 11:37 AM #8
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11-10-2011, 11:39 AM #9
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11-10-2011, 12:01 PM #10
There were 2 major changes made to the 01-02 Fbodies. The LS6 intake as mentioned above became standard, as well as the LQ4 truck camshaft being used in 01-02. It's a smaller camshaft (about ~.470 lift) compared to the previous 98-00 camshafts used in the F-body (~.500 lift).
The intake was an improvement but the camshaft was a trade off. Still somehow GM thought it necessary to boost the HP rating a tad. I'd bet the smaller camshaft probably gave a better torque curve.
Worth mentioning too, the exhaust manifolds were a better flowing design in 01-02, and the cylinder heads (the 241's) used on the 01-02 models were also introduced, and are said to be slightly better than the previous 851 castings used on previous years.
To most none of this matter anyway because alot of these things are swapped for aftermarket parts. It's up to you...
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11-10-2011, 12:37 PM #11Here is the link for the car. You can see how it has the ram air hood, does that necessarilly mean that it is a WS6?
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