From Motortrend.comSignificant engine tuning on the 99 4.6-liter modular V-8 has lessened our all bark no bite criticism of Mustangs since 94. At the dragstrip the 99 GTs performance numbers though great for a Mustang are still not tops in this muscular crowd. Yet 0-60 mph in 5.4 seconds and a 14.0-second/100.2-mph quarter-mile run is as good or better than any stock Mustang weve ever tested Cobra or not. Slalom and skidpad figures closed in on those of the more sophisticated (and expensive!) Cobra at 66.8 mph and 0.86 g respectively with the independent rear suspended Cobra turning in 67.8 mph and 0.88 g. Viewed in this way the SVT superpony seems hardly worth the extra $7000.

 

Yeah there have been more than a few stock 99up cars to see 14.0. Do not under estimate them. Mine with just a gear X-pipe and mass air ran a best of 13.30s. That would be enough to keep up with a lot of stock LS1s with 70 less cubes at that.

Best time to date..12.63

 

1 7h1|\|k 7h3 d|21v3|2 h45 7h3 b1gg357 f4c70|2 1|\| 4 1/4 5p|21|\|7. 7h47 c0uld 3451ly 3><pl41|\| 7h3 ?5 4b0u7 \^/h47 4 570ck 99G7 |2u|\|5. Ju57 my 2 c3|\|75.

 

65 less cubes. The LS1 is 346ci. Mods do alot for the newer cars. With similar mods to your bolt ons I am keeping up with and going quicker than Vipers that have 142 more ci than my LS1. But the Viper can always mod also. I am impressed with the newer 4.6s heads cams and intakes. I know someone who just put them on his 96GT and it was an amazing difference.


jess

12.2s NA and on street tires.

 

Yeah the 99 up heads do even more for the older cars due to the resulting added point of compression. There was a white convertible at Tune Tech the last time I was there getting the swap. Was that your friend?

 

Yep that was the car.


jess