I tried a normal 1000 RPM everyday take off a few times using gtech. I got around 6.21 seconds.

Gtech was very accurate when i took it to the dragstrip with me twice. It was within + or - 0.1 seconds on the 1/4 mile.

Thanks

 

Of course 1Y2KS2K, shift anything short of 9K rpm and you will not get 6.5 sec. You aren't shifting shy of 9K are you?

 

<<Stan, glad to see you're still with us!
Thought you might have written us off after that Sev incident>>

Thanks. I was just invited here by my buddy. I guess a lot of folks ditched the other place. Survival of the fittest!!

I don't recall any significant incident with Sev but I was not impressed with a different character whose anonymous two word moniker starts with a T and an R.

Stan

 

Some other boxes to consider include the Road Dyno which is kind of fiddly but gives actual torque and HP curves and corrects for weather conditions, aero drag, etc:
http://www.charm.net/~mchaney/homedyno/dynokit.htm

And the AC22 which is a bit more $$ than the Gtech but much more flexible - it can do speed to speed tests:
http://www.race-technology.com/WebPage/Pro...celerometer.htm


And the Geez which is autocross oriented but can do dyno stuff too.

http://extremegeez.com/


And various other boxes or gizmos such as memory tachs, dataloggers, aftermarket ECUs and so forth.

One very powerful feature of the programmable units is speed to speed testing. This can allow in-gear tests from one RPM to another. The least time = the most area under the curve. For example I often test 2nd gear times from 30 to 50 or 60 mph. The driver simply holds their foot to the floor. Zero skill or talent is needed and if you start on the same piece of road, even if it is less than perfectly flat, then you get comparative results which repeat down to 1 or 2 hundredths of a second if nothing changed. Tests such as 0-60 or 1/4 mile require skill and many repeated runs to get consistent reliable results. So you can quickly compare air filters, oil, chips, exhausts etc easily with in-gear testing. One huge benefit over an engine or chassis dyno is that EVERYTHING is tested. Including air flow (which varies with speed), wheel rotating inertia, etc, etc. I found 2-3 extra HP by moving my CAI entry point about 2 inches. A chassis dyno is nearly blind to such changes. Much better for turbo cars too since intercoolers need actual airflow to work properly.

BTW my near stock but with cheap bolt-on / custom mods early 4 cylinder M3 does 0-60 in around 6.2 seconds after lots of tuning with in-gear tests. I think I'll be able to get into the fives with some more mods such as ditching the stock restrictive Bosch flap-box air flow meter and replacincg my very heavy 16 inch wheels and tires - 44 pounds apiece. For such a test the driver launches at about 2500 RPM which gives you an idea about the difference in torque curves between the two vehicles. Tremendous wheelspin if you launch at 3000 RPM. And that car has a no-low-end torque reputation!!

The S2K is likely to benefit from in-gear testing (compared to from 0 and with gear shifts) more than other cars since the driver skill and random variations are removed in such a test. Easier to get useful information.

Stan



[This message has been edited by E30M3 (edited October 19, 2000).]

[This message has been edited by E30M3 (edited October 19, 2000).]

 

My bad, sorry Sev, it was The Rev, (like Gore) close but no cigar

Anyways glad to see you posting again Stan!

 

Oh ya, i just remembered, i EVEN tried a 1/4 mile run with a normal 1000 RPM take off.

I got a 14.6xx

Damned fast for a car that is not trying.

 

GUILTY! I'm a wimp.

Too many times I've tried redlining before the engine's fully warmed up. Therefore, when VTEC cuts-out on me, the sudden deceleration and loss of power makes me look like a right idiot!

 

No Problem RT.