I'd like to thank LaRocca's Performance of Old Bridge, NJ (phone 732-723-1111) and especially Jimmy C. for extending their professionalism and expertise to me and my car.    If you demand the best for your car, this is the shop to call.

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All stock with 4800 miles and synthetic oil:
Horsepower = 290 @ 5200 rpm.
Torque =         310 @ 4400 rpm.

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We made some slight modifications before we ran this dyno test. Random Technologies Cat-back exhaust, Direct-flo airbox lid, and we removed the EGR that sticks right in the center of the throttlebody.    I was hoping for more, but i think more break-in miles will yield more favorable results.
Horsepower = 307 @ 5500 rpm.
Torque =         321 @ 4400 rpm.

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2000 Update:

Date: March 16, 2000
There were no changes, except for additional mileage. The car had 8000 miles on it for this test.    The increase in horsepower resulted from the additional break-in mileage as well as the computer adjusting to the new exhaust and airbox lid.
Horsepower = 312.2 @ 5500 rpm.
Torque =         327.0 @ 4500 rpm.

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Date: May 27, 2000
The only change was the addition of a Granatelli Motor Sports (GMS) Mass Air Flow (MAF) meter. The new meter was used on the car for approximately 1500 miles before it was dyno tested. The car had 11k miles at the time of this dyno test.
Horsepower = 318.4 @ 5300 rpm.
Torque =         333.8 @ 4400 rpm.
It is interesting that the peak power came slightly before it peaked without the new meter; an added benefit. Some of this gain is from the additional break-in mileage.

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To summarize:
HP:
4800 miles, stock =                                290 @ 5200 rpm.
4800 miles, cat-back & lid =                 307 @ 5500 rpm.
8000 miles, cat-back & lid =                 312 @ 5500 rpm.
11000 miles, GMS & above mods = 318.4 @ 5300 rpm.
Torque:
4800 miles, stock =                                 310 @ 4400 rpm.
4800 miles, cat-back & lid =                 321 @ 4400 rpm.
8000 miles, cat-back & lid =                 327 @ 4500 rpm.
11000 miles, GMS & above mods = 333.8 @ 4400 rpm.

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Pleae be advised that the following sound bytes were recorded while my car was strapped to the dyno. Thas is why it almost sounds like a jet airplane towards the end of the run.

Listen to my stock exhaust.   Not bad for a stock exhaust system, but a little quiet for my tastes.

Now hear my Random Technologies Cat-back exhaust.    The new cat-back sounds much deeper than the stock system which it replaces.

2002 Update:

I got a B1 cam!!! Listen to my new cam   "Gold Jerry. GOLD!!". I have also added headers, intake and y pipe. See the "LS1 Modifications" page for pics and details.

Cartek did a great job of tuning my car. They used a software called "LS1edit" to fine tune the air/fuel ratio, rev-limiter, idle, timing, and various other parameters. This first graph shows the difference the tuning made. Before the tune, it made 375 hp and 355 TQ. After Julio worked his magic, my car made almost 386 hp and 365 TQ. I still have stock heads that have never been off the motor!

But as the next graph shows, my fuel pump is not keeping up with the new horsepower levels. The bottom part of the following graph shows the fuel pressure dipping to below 50 lbs. That is no good. A new pump will be in there soon, and we'll see if that increases horsepower even more.

Update: Jay Fisher Pontiac replaced the stock fuel pump and Cartek finished the LS1edit dyno-tuning session. The air/fuel ratio is now in a safe range. An added benefit is an increase of 5 ft-lbs. of torque to 370. Horsepower increased slightly (by 2hp) to 387.5 hp. An interesting side note is that the SAE correction factor was .98 and the actual (uncorrected) peak horsepower was 396 and actual (uncorrected) peak torque was 379. As a matter of fact, the car is now making more power everywhere on the graph when compared to the dyno graph of the bad fuel pump. Below is the SAE corrected dyno graph:

Before the fuel pump change, the car didn't make 350 TQ until 4300 RPM. But with the new fuel pump, the car makes 350 TQ at 3800 RPM. Before the fuel pump change, the car made 350 hp at 5300 RPM. With the new fuel pump, 350 hp is made at 5000 RPM. This benefit will also be reflected in my quarter mile times.

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