HS 1.7's made no difference
#1
HS 1.7's made no difference
I recently installed the HS 1.7 roller rockers in my 99 D 5.2 and first drive out I didn't notice any difference in performance, mileage, or exhaust noise(I have a straight pipe system with a very small hi-flow cat). After a day, I realized I didn't reset the pcm, so I reset the pcm and still no difference. Ive put on about 300 miles since the install and no difference in mileage, power, or exhaust and 1/4 mile times unchanged. I read so many good things about them and now im disappointed that I just spent $350 with no gain. The only thing they did was smooth everything out especially in the high rpms. It's not like these are my only mod, like I said I have hi-flow exhaust, ss headers, k&n cai, helix tb spacer, msd blaster coil, 8mm wires, superchips flashpaq, brand new quality plugs, wires, cap, and rotor, freshly cleaned tb and sensors, and I only run mobil 1. Anybody have any input, maybe I did something wrong?
#4