I have a 83ZXT with 168,000 miles on stock engine. I bought it for $300 (whole car). Spent $1200 on T04, intercooler, boost controler, fuel pump, as everybody on this page told me to do. Running 15-16psi I took it to the track it did a 13.5 @106 on street tires 205/60/15, burning them all though 2nd gear! I had it dynoed today it put 340ft/[email protected] and [email protected] to the ground (at rear wheels) This = about 410ft/lbs and 320hp at the crank!!!!. Here is my problem, my hp dives after 4600-4800. I want to change this over to MASS AIRFLOW SENSOR. I think it's the problem, I know somebody knows how to do this,please help. I already have the sensor, in fact I have a whole 84 300ZX.