Thanks for the info...but like I said...I know nothing about cars yet so I am trying to learn. The Saturn has a bad problem. Here it is. The car at stock could make 0-60 in 9 seconds. Now it takes like 19 seconds. The car keeps jerking as I get to about 3000rpm in any gear. The acceleration was demenished...and I cannot run in 4th or 5th gear without terrible engine knocking. Also when I rev to about 4000rpm in any gear I get a shit-load of white smoke. I want to know what the problem is if one of you know. I would greatly appreciate it. I am planning on pulling the 16V SOCH and replacing it with a 24V DOHC then the turbo...then the others such as suspension body mods rims etc....nitrous will be my last mod. But like I keep saying I dont know a thing about cars and if somebody could teach me I would greatly appreciate it. I live very close to Regency20 in Brandon. I am not gonna work on the SOHC but I need to know how to fix it so I can at least get to work and back. Thanks for all of your time.