Chevrolet S10 Newly Tuned Truck!
Being a truck fanatic who loves to go fast and happens to own a Chevy S-10, adding a supercharger to my stock 4.3L was a no-brainer when it all came together.
Superchargers are great and can add gobs of power to an otherwise factory-equipped minitruck. But here’s the problem: one supercharger, plus no computer tune, equals little-to-no horsepower gained. This was the case with our Chevy S-10 as we ran the truck on the dyno when we installed the AEM Brute Force Intake, where the truck laid down a very respectable 171 hp to the wheels. Fast forward a year, and the truck was strapped down to the Superior Automotive dyno. However, this time it was equipped with a Vortech SC-series centrifugal supercharger-complete with smaller 9-pound serpentine pulley, high-flow T-Rex inline fuel pump, and a reflashed ECU. After smashing the throttle, the dyno chart showed 156 hp. Sure, different dynometers read differently, but a decrease of 15 hp-how could this be? After talking to dozens of other S-10 owners, as well as engine gurus, we discovered that tuning was the missing piece of the horsepower puzzle.
This revelation, that my truck was in desperate need of some tuning, sent us straight to Ida Automotive, one of the United States distributors for Perfect Power. Ida Automotive is the same company that built the Ford F-150 project named Frightening, a 1,000hp, twin-turbo V-8 truck that could smoke just about anything on the road. Talking with the owner, Bob Ida, we discussed several tuning options and agreed that the Perfect Power SMT-6 piggy-back computer was the way to go. The SMT-6 had the ability to tune almost any engine and had three separate maps-fuel, timing, and ignition-with the capability to fire extra injectors, nitrous, or other performance accessories.
When using Windows-based software, the SMT-6 is easy to use and can be installed by someone familiar with tuning. The discussion of fuel issues with Bob had revealed Ida Automotive’s capability to weld a bung onto the Vortech aluminum intake hat. This bung would house two extra injectors, fired by the SMT-6 under boost, that would fire right into the oncoming air from the supercharger. This would remedy the lean issue, and fuel could now be free-flowing and power might actually be made. Next, we contacted Edelbrock for a pair of its 27lb-hr Pico-style injectors that would fit the machined bung, perfectly. With each piece of the puzzle obtained, it was time to find someone who we could trust to tune the V-6. We looked no further than Shawn Ellis, of SoCal Tuning. We knew he had tuned several diesel trucks and made serious power with some computer wizardry. Using Superior Automotive, in Anaheim, California-a dyno facility-we were able to plug the Perfect Power pigtail cable right into Shawn’s laptop and begin the tuning. How did it turn out? Read on…
1. Strapped onto the Superior Automotive dyno in Anaheim, the supercharged untuned 4.3L laid down an embarrassing 156 hp. If you have experienced let-downs like this with your truck, a tune-up should be on your to-do list.
2. Before we arrived at Superior Automotive, we installed the Perfect Power SMT-6 digital processor. It can handle superchargers, turbos, nitrous, multiple ignition boxes, and other accessories requiring a vacuum-assisted 12-volt signal. We removed the wiper motor then mounted the small processor box on the firewall.
3. We labeled each color-coordinated wire to correspond with the stock ECU wiring. Ida Automotive, supplier of Perfect Power products, supplied a wiring schematic just for the ‘01 S-10 with 4.3L, so that there would be no need for second-guessing the wiring.
4. A requirement with the SMT-6 kit is the use of a two-bar 28-psi MAP sensor. Tapping into the MAP sensor, the SMT-6 can instantly determine when boost is occurring and activate the necessary triggered accessory, which in our case is two extra fuel injectors. Because ‘01 S-10s didn’t come with a MAP sensor, the two bar unit was included in the Vortech supercharger kit and senses boost from the T’ed stock vacuum hoses.
5. Rob Ida, son of Bob Ida, perfectly welded a plate to the Vortech hat with two bungs in it to insert two Pico-style injectors. Ida Automotive also included the hex fuel rain and mount, which came complete with Ida logo, held in by four 1/4-inch screws, preventing any leaks. The added fuel will spray directly into the blower-inlet hat, which will help to eliminate the lean problem we were having before. The Perfect Power SMT-6 triggers the two Edelbrock injectors when the MAP sensor senses boost, which in our case, came from the vacuum hose.
6. The final piece of the pre-tuning puzzle was the installation of new plugs for our dyno runs. We chose the new E3 spark plugs for its Diamond-Fire technology that produces a larger and warmer spark. For the supercharged 4.3L application, we installed a cooler set of E3.54 plugs.
7. With everything bolted on and ready to rock ‘n’ roll, we had one last chance to double-check our modifications before the moment of truth. Notice the Edelbrock injectors coming off the Vortech hat; that menacing look means power!
8. It was time to strap the truck onto the Superior Automotive dyno. Shawn Ellis, owner of SoCal Tuning, went to work by loading the new Perfect Power software onto his laptop. Shawn was accustomed to looking at timing and fuel charts. It’s this kind of experience that can make a difference when generating more power.
9. After logging in and setting up the S-10’s data to the program, the baseline fuel and timing figures were acquired. By using the AEM UEGO A/F ratio gauge, Auto Meter Fuel Pressure, and Auto Meter Boost gauges in the triple A-pillar pod, we were able to monitor these two key pieces in the horsepower puzzle.
10. Starting with the fuel chart, Shawn was able to adjust the fuel-injector pulse width every 50 rpm, based on the fuel pressure and air/fuel ratio. Using the load deflection of each injector amperage, an exact point was able to be calculated and adjusted to make certain the injectors were sending the right amount of fuel.
11. Switching over to the ignition chart, Shawn continued to monitor and adjust the timing to ensure there was no detonation and that the fuel would burn at just the right level. A great feature of the SMT-6 is the ability to override an aftermarket ignition system like the Crane Cams H-6R that came with the Vortech kit.
12. Several strong pulls later, the newly-tuned 4.3L put out 247 hp to the wheels, with an increase of 91 hp. That is an awesome improvement, due to just a couple of minutes clicking the mouse on a laptop. With the Venom digital-nitrous system installed, the truck should make 293 hp, based on previous dyno runs and maintaining safe percentage levels. If you’re tired of adding new performance bolt-ons and not noticing a difference, contact a tuner near you, because the computer makes all of the difference.
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