Ok, in a few weeks I will get my car back from the dyno for the final time. Last pull was 780rwhp. Expected pull this time in excess of 850rwhp. I have a 4L80E o/d, 3:25 rear gear and tall "Z' tires. My math says this car will run upwards of 200mph at approx. 7200 rpm and I believe the car has the power to pull it. Can anyone out there contribute solid info from experience, yours or someone else's, how this car may behave at those speeds. I have a 91 Z28, all spoilers and ground effects in place, Harwood forward facing hood scoop but all air is directed into the procharger intake. I have had the car with previous engine to 150+mph and handled decent but did not maintain that speed for any extended period of time for sure. I have also had the car to about 140 with the added hood scoop but at that time, the hood scoop was not sealed to the blower intake so I believe it was creating under hood pressure causing some lift as the car was motor boating a bit at that speed but again, did not maintain speed for very long. The car is a little front heavy with procharger and all the peripherals including big radiator. Who knows something on this.

 

Are you planning to run for extended periods of time at 200mph? You need to consoder building a real front arm dam and splitter at the very least and look into a rear spoiler for the rea for some downforce.

You will find better info on frrax.com on this subject.

 

Tell us about your suspension, wheels and tires, aero modifications...

You only need about 500hp to get past 200mph in a 3rd gen, BTW.

 

at 50