Ultra chip
I like the Ultra chip because it allows you to change your setting on the fly. 0= anti-theft no start, 1=rev limit 4800 top speed 65, 2= Stock chip, 3= 18 deg timing 91 octane, 4= 20 deg 93 octane, 5= 22 deg 98 octane, 6= 24 deg 100 octane, 7= 26 deg 110 octane. Settings 3-6, 6000 RPM rev limit. Setting 7 - 6200 rev limit. Your boost goes from 12 psi stock to 19 psi at the highest setting. So you get about 1-2 lbs each time you adjust up a click. You will need to know what size injectors the chip was designed for. Contact Caspers with the info numbers from the chip and he can tell you. Hope this helps. Mr. Buick