It would be very difficult to get your car to exactly 60, then punch it. Some would start at 58-59 mph -- others would start at 61-62 mph. These differences will diminish the accuracy of the measurements/comparisons and create undesired variables. Moreover, and perhaps more importantly, our speedos are NOT accurate and, even if we start at 60 mph according to our speedo, our actual speed is almost certainly not 60 mph . . . it is something more or less than 60 mph. Finally, if we want to compare our numbers against those measured by Car and Driver, we need to start at some mph below 60, so that we are WOT before we hit 60 mph.

The only way to eliminate the variables and ensure consistency in testing procedures is for everyone to start the test some where below 60 mph . . . it doesn't matter what speed you start at, so long as you are WOT and full boost at 60 mph.

You may want to play with what gear you start in. Starting in a lower gear may enable you to be at a higher rpm as you pass 60 mphs, whereas starting in a higher gear may eliminate a shift. Therefore, as Bill already observed, when posting times, one should include the gear they were in when they passed 60 mph.

Craig

 

Great point. Even a small incline or decline could throw off the data.

 

Kaizu
Based on some comparisons that I have done, I got 100-200kph to be about 0.9-1.2 seconds faster than a 60-130mph.. Just for quick reference I would take about 1 second as an average.

These times are from Sport Auto.. Some of them are 4 years old!! All cars per stock weight or close to it.

GEMBALLA GTR 750: 5.3 seconds 100-200kph (Sport Auto 2002)
The Manthey M700 turbo did 100-200kph in 6.1 seconds (Sport Auto 2004)
CGT 6.4 seconds 100-200kph (Sport Auto 2003)
RS Tuning GT2 542PS 7seconds 100-200kph (Sport Auto)

 

You have to start below 60 for the results to be accurate. You also have to finish above 130 for it to be accurate. It just makes sense.

 

Jean,

You forgot about the 7 second M5 in your list...
I have played around with a stopwatch and analog speedo and the
accuracy is a joke. We did several runs last summer and there are just
too many variables in a non-AX22 run.
7 seconds would put you in some rare company,
read Craig's list of mods and then tell us your list of mods so we
can have a great time discussing the 7 second M5...It must be
gutted tubbed and supercharged.
MK

 

anyone in so cal w/ an AX22 want to meet up?

 

It sorta is.......minus the gutted.
here is the build sheet.

http://www.discovery-automotive.com/...c_Content&id=4

Here you can see everything done to the car. I didn't realize some of you didn't know what car I was talking about.

 

Hahahaha... Good For You philly!


http://www.discovery-automotive.com/...c_Content&id=4

 

Thats an impressive M5 Philly.

Craig

 

I see that you are using a NX spray on the IC . . . do you think that is a worthwhile upgrade? How often do you fill/replace the tank?

Craig

 

Philly,

That is very very nice! Have you dynoed it to it's full potential yet? By the way I noticed the builder using a heat gun on the flywheel? Perhaps heating the bolts?

Joe

 

I can notice a difference once the car gets heat soaked. It doesn't really do much if the air is cool outside, or if the engine is fairly cool. After a couple of runs on the highway, or after being stuck in traffic, it will basically just bump the car back up to the power it should be. It really doesn't seem to "add" any power, just gets the power back.

I really don't have to replace it very often. It only sprays if I turn the bottle on....and at wide open throttle which is fairly rare. Most of the time, the bottle isn't even in the car.

 

It has only been dynoed up to 6000 rpms.... that was for tuning before the motor was broken in fully. The claim then was 650 something at the wheels at 6000 rpm. I have yet to dyno it myself and see what the real numbers are. This spring it will be on the dyno foresure.
I also tried to run it at the strip, but the driveshaft(u joint) snapped just shifting into second........now it has has carbon fiber shaft in it. It is pretty damn fast, but has NO business drag racing. A civic will beat me from a stop. I just can't put the power down from a stop.

 

Josh,

Your M5 is crazy, what a beast! that was amazing that it only took 3.5 months to do the conversion.

 

Actually. It took alot longer than that. It was like a year or something. I didn't have it done, I bought it off another party who had it done.

It is in DA right now getting some things done. Adding oil cooler, changing the rings...just getting ready for this spring. It will be back in my possesion in about 2 weeks.