donp

...did it take us this long to "discover" block 120?

I mostly ignored it because info out of my '97 1.8t was totally bogus and later one of the tuners told me the data was "severely flawed" although I can't remember what the reasoning was.

The computer is measureing crankshaft acceleration and then backing into torque. It seems hard to argue with the stock numbers. Do those figures change if you run up a steep hill? (no hills here) or if you've got 3 of your 200 lb friends in the car with you? If not, this would *appear* to be much more repeatable than say a g-tech or an AP-22 simply because the road or a headwind wouldn't have much of an impact on the numbers.

Interesting... very interesting indeed.

Turncoat

Block 120 is definately affected by road conditions. Dips in the road will produce dips in the measured torque output, at least in my experience. Also, the test stretch I use is uphill with a slight 'S' curve to it. I think with the higher horsepower output I'm getting some slight wheelspin which skews the torque readings. The idea is to keep the car under WOT full load through the entire RPM range. Third gear pulls, while risky due to the high speed toward the end of the ROM range, produce the best graphing due to the higher number of datapoints.

Taner's crazy doing 4th gear pulls. I like having a license to drive.

And remember this, with a DBW system, the "gas" pedal is no longer a throttle, it a "torque request" pedal.

blueS4 (vince)

Thanks bro

Vince

Taner Halicioglu

Go to Measuring Blocks and enter in '120'.

Then tell it to LOG.

Do your runs (pausing the logging between - at least, I did).

The data you get (that you care about) is RPM and Torque. You'll need to calculate the HP using the forumla:

HP = torque * RPM / 5252

then plot the data with your favorite graphing program (I used gnuplot on my linux machine).

-Taner

Taner Halicioglu

You know what is sick... 4th gear was over in XR mode (from 2500 RPM) faster than 3rd was in stock mode (also from 2500 RPM).

I wanted to get 1 4th gear pull to see if the numbers were any different -- they weren't, so 3rd gear will suffice

I should try a run on a steep incline/decline to see exactly how that affects things... the bumps in the road are one thing, and obviously affect it, but the actual road grade shouldn't really affect it I don't think... maybe? I dunno....

-Taner

Turncoat

as long as your under full load. I think uphill runs or those when the car is full of fat asses only increase the duration of the run. I need to do some level grade runs on the highway and compare.

Taner Halicioglu

Yeah, I agree

ShutupAndHoldon

The torgue jumps when you lift with XR. It would be intresting to see if your getting a boost spike up there.

ShutupAndHoldon

Someone sent me this link about block 120-122 vs dyno testing<ul><li><a href="http://forums.vwvortex.com/zerothread?id=199882&postid=1665478#1665478">http://forums.vwvortex.com/zerothread?id=199882&postid=1665478#1665478</a</li></ul>

blueS4 (vince)

Gotta try this... Thanks T