2 Questions:
1.) How many miles are on the car now?
2.) If you think the car can do 170 in 6th just leave it in 6th and run it!
I have done numerous top speed runs..., in many cars. The '97 GTS Viper that I campaigned in '98 did just a tick over 200... still would NEVER pull 6th Gear!
If you are actually doing 175+... you should be able to touch the limiter at that speed... 171 was about 6200 when I did the one... I haven't done it since... I have been spending to much time prepping for this years Campaign in SS.
I don't doubt your times, I thought I was helping to validate... but sorry.. 6th gear won't pull it... At 170+ MPH... you are going to have to leave the car in 6th for quite some time, to see that it is falling off MPH... 5 seconds in NOTHING at those speeds...
Good Luck... be careful... set up a InCar Cam! That would be sweet! We tried to video my 200+ run in the Viper... but my friend couldn't hold the camera Still!
About 185 it is pretty blurry... but I tried... and atleast brought a witness!
Have fun
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Dave Schotz
2001 Z-06 White w/Mod Red
Solo 2 SS Class #39
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