|Shrader Performance was invited to bring its 1999 Mustang GT to one of the most highly regarded magazine shootouts ever produced. The results printed in the May issue of 5.0 Magazine and Super Fords Magazine and the overwhelming response from readers has been “How did you get a 4.6 2v car to compete with blown 5.0 Coyotes and 5.4 Shelby GT500’s?!” The answer is, our ’99 GT is a sign of the hard work and tons of research we’ve done to find just the right combination for a streetable Mustang that makes gobs of horsepower. We built this car to be the smallest combination possible but with the biggest and most impressive results possible. With a stock bore/stock stroke 4.6 (281 ci), and ported PI head castings, mated with Vortech’s smallest supercharger, the V2-SQ trim maxed at 17 psi, and a healthy dose of nitrous, we were able to push the little modular mill to 906 rwhp SAE here on our home dyno!
Granted, on Holley’s dynojet at the KOTS event, we expected the numbers to read lower than usual, as are most everyone who visits their dyno. We made two pulls at Holley’s indoor facility in Bowling Green KY. At 833 rwhp and then 834 rwhp, it gave us the 4th highest horsepower numbers of the competition. Keep in mind that the 2nd through 7th place cars were all in the 800 range, with very close numbers.
We were one of only 2 cars in the competition that showed up on day 1 driving the car into the show grounds like a true street car should be. Everyone else brought a trailer, and a crew for support. After all, the event title is King of the STREET, so we wanted to pull up in our street car, confident about it’s abilities, not worrying about breaking or needing trailer support.
Day 1 is the Ride and Drive portion of the event, where editor Michael Johnson drives each car to test it’s streetability. It’s safe to say that Mike was thoroughly impressed with our little 4.6 around town, and was actually intimidated to try out the nitrous after being blown away by a few street pulls without it. Our yellow machine is a full fledged street car with cold A/C, factory leather power seats and all the amenities of a typical mustang. The only thing we removed was the stereo system, which we rarely used anymore anyway. We were deducted in points on the missing radio, so in hindsight, for the competition we should have left it in there.
We have built bigger 2v and 4v setups with larger cubes and larger blowers that turned out more impressive horsepower numbers, but our ’99 GT is built around a small setup to show the capabilities of the little 4.6 engine.
If you’re looking to make a 2-valve engine exceed your expectations, we can help. Give us a call and let us quote you on an engine build to fit your dream car.