Z32 Speed Check

Am driving a 1993 TT, 2+2 ZX auto, in overdrive. Tacho reads 6550 RPM. How fast am I going??

 

You are dreaming ........ a TT auto is not capable of reaching 6550 rpm in overdrive

Assuming you were able to manage to do the impossible, you would be doing a theoretical speed of a smidgeon over 304km/hr

 

1 How would you know what it is capable of if you have never been there?
2 Not too far off!

 

@ a tad below light speed, sure the tacho is right, did time stop.

 

Actually, the OMNI on-line calculator using 64.9 cm on-road tyre diameter and the J-Spec TX ratios is pretty close.

 

How many killer wasps would you need to get to those rpm in overdrive ( torque converter locked up)?

 

I'm guessing here but either your tailshaft has broken or your transmission is fuct or you're funning with us
If not, go you just - GO YOU!

 

Good point, an always overlooked point.

 

According to my calculator I did in excel.
At the given RPM and Overdrive (0.694) using 225/50/16 tires with Turbo diff gives 303.99 kph. The Non Turbo diff gives 274.88kph.

 

Not too far off. Try with 275/35/18 tires

 

None of the above Mick. There is quite a personal and technical story here but I am not going to post it due to the inevitable pile-on from the doubters and naysayers, although comments about their experience from anyone who has driven a car at serious high speed, >200kph, road or track, would be welcome.

I can say that my high speed driving and accident avoidance training was carried out formally over 4 days, by an NT Highway Patrol officer at the Hidden Valley racetrack in Darwin who boasted that he regularly averaged >150kph between Alice Springs and Darwin.

 

With the diameter of 275/35/18. 283kph non turbo diff and 313kph for the turbo diff

 

That's why he looks younger than us, good on him I say!