Bill,

I'll have mine back together in about a month. I'll give it a try. Sounds like we will be starting in first.

 

Gunning it at the starting speed has too many variables, like turbo lag and reaction time. Doing it like this gets rid of all that. It also allows you to compare your times with what you see in the magazines.

Also, it's real accurate to measure the "difference" time from the video, assuming your speedo is not too far off.

Finally, it doesn't matter if your 0-60 is 3.3, 4 or 5 seconds, as long as you're on it strong before you reach 60.

 

Great! Please take a video with sound! A picture (or in this case, a video) is worth a thousand words!

 

Lag can be offset by proper engine speed and gear selection. Besides, if you're comparing with a non-turbo car, that's the price you have to pay. Isn't measuring available torque+hp at 60mph and rpm# part of the purpose?

Otherwise, you're just measuring rate of acceleration between 60-120. Why not 50-120 or 30-120 and beyond?

 

supra, too much to list. high boost and juice should produce mid 4 sec run.

 

You may use this same procedure to measure 60-120, 50-120 or anything else. You can also go down to 20 or 30 MPH, as long as everyone starts the test with the clutch fully engaged and the car rolling.

With the video, you can compare whatever you want. The only thing you don't get is how long it took the engine to respond to your foot. That's a whole different test that's not easy to see in a speedo video.

 

My car does just over 60 in first. Thats why i prefer to go from 70-75mph in second. 60 mph the revs are too low. Now if you guys are just timing it buy say flooring it below 60 mph, but timing it from 60, than thats a different story.

 

You got it! That's why it doesn't matter.

 

is that a 993 or a 996? and was the car detonating?

 

After getting the CGT, I think 0-arrested is a good measure. The CGT gets there blindingly fast :-)

 

I like the 0 - 180 mph or 0 - 200 mph...both minimize "starting" advantages of one vehicle over another or one driver over another. Also, does not requre "hard" on the vehicle starts!

Maybe a 30 - 180/200 mph

Happy Holidays,
Marc

 

The speedo video is for a 993TT. The car will not detonate because it has knock sensors.

Ben, if you wish, we can video your speedo. However, I may need to brace myself against something.

 

Going to 180 or 200 is not practical for most people in the US. 60-130 is easy and still removes the starting problems.

 

That sounds like a blast except for it's "evidentiary" value - especially if something were to happen.

 

Yes. You can publish a close-up, labeled "Simulation of a CGT speedo". I can lend you my camera to help you make the simulation.