Living here in the good ol' USA, we have options-too many as far as I'm concerned. one can choose where they want to live, what they want to live in, and for a little extra-oK a lot extra-what kind of amenities they would like. I remember as a child drinking water from the tap-yes, we actually used a glass and drank the same water as our fellow neighbors. Now we have an abundance of plain bottled water, flavored water, and vitamin-enhanced water to choose from. Talk about a spoiled society.
Well, there's no turning back now and the automobile is no exception. When purchasing a new-model vehicle, one has many choices: Do you go with the 4-, 6-, or 8-cylinder engine? If you choose the 8-cylinder, do you buy the standard or the high-horsepower version? Many options can be had depending on your budget. Think with your head and not over it (as most of us are guilty of the latter).
Once our baseline dyno runs were complete, Hank Jr. drove the C5 over to the SLP Installat
For this particular LS-engine installment we are looking to take a base model 1999 Corvette, which is equipped with a 5.7-liter LS1 engine rated at 345 hp and 350 lbft of torque, and take it to (or exceed) the power level of the 2001 Corvette Z06, which was advertised at 405 hp and 400 lb-ft of torque. This could easily be achieved by employing a nitrous system or even some forced induction, but what's the challenge in that? Let's see if we can turn our tap water into a great tasting energy drink.
For part one of our journey we decided to facilitate better breathing by upgrading the entire exhaust system. While many products are available in the aftermarket, we decided to call upon the pros at SLP (Street Legal Performance) in Toms River, New Jersey. SLP is known as a topnotch leader in LS-powered technology. SLP designs, manufactures, and tests the majority of its products in-house, as quality control is of utmost importance. Whether your needs include something as minor as a gasket, or something as major as an all-out, firebreathing monster, SLP has you covered.
Upon arrival at SLP, Hank Daniecki Jr., director of engineering at SLP, greeted us. Our first order of business was to strap the Corvette on SLP's Super Flow chassis dyno to get some baseline numbers. After a couple of runs our stock 6-speed '99 rolled to the average tune of 312 hp and 323 lb-ft of torque-pretty impressive for a bone-stock LS1. After a little mathematics, that equates to an estimated 360 hp at the flywheel (that's 15 hp more than it was rated at).
We were impressed, both by the quality of SLP's parts and the ease of installation. Better still were the "after" dyno results. Not only were the peak numbers excellent (338 hp/348 torque) but the important digits under the curve were outstanding as well.
We are on our way.
Once all of the oxygen sensors were removed, Hank began removal of the cat-back exhaust as
The next order of business was to remove the fasteners holding the H-pipe to the exhaust m
SLP Technician Hank Daniecki Sr. was chosen to perform the installation. The first action
|THE HARDWARE |
|PART# 21114: COLD-AIR INDUCTION / "FLOPAC": ||$308.95 |
|PART# 31090: EXHAUST SYSTEM / "POWERFLO" WITH ROUND TIPS: ||$949.95 |
|PART# 30067: H-DOWNPIPE: ||$179.95 |
|PART# 30060: TUNED LONG TUBE HEADERS: ||$849.95 |
|PART# 30062: HEADER / INSTALLATION KIT: ||$105.95 |
|PART# 30063: HIGH-FLOW CATALYTIC CONVERTERS: ||$399.95 |
|PART# 30065: H-PIPE / BALANCE TUBE ASSEMBLY: ||$278.05 |
|TOTAL PARTS EXPENSE: ||$3,072.75 |
Once the C5 was reacquainted with the earth, Hank began removing the battery and engine sh
Shown here is the difference between the stock exhaust manifold and the SLP 1 3/4-inch lon
The driver side header requires the additional removal of the steering shaft, alternator a
Here it is-our completed installation. All of SLP's components fit like a glove-no cutting
Once the under-hood items were buttoned up, we headed back under the vehicle to install th
Hank Jr. also recommended that we install SLP's "FlowPac" cold-air package. This kit consi
After the install we took the C5 over to Raceway Park in Englishtown, New Jersey. After a
Once back on the dyno, the C5 pumped out 338 hp and 348 lb-ft of torque. That's a gain of
SLP Performance Parts
1501 Industrial Way North