Hello,

I used vag-com to log block120 on my fab1.4 16v and I got the following results. I took the measurements at 3rd gear....

How reliable are these readings? I know that the measurements are in the crankshaft and not at the wheel...Any indication how much are the losses?

My fab is chipped, with green twister air filter, new headers and new exhaust as well...

Your comments will be appreciated

Could you perhaps give a numptie vag-comer (me!) a quick guide on how to do this?

Thanks and Rgds

Richie

this may be of interest:

http://www.seatcupra.net/forums/showthread.php?t=54296&highlight=block+120

Could you perhaps give a numptie vag-comer (me!) a quick guide on how to do this?

Thanks and Rgds

Richie

first off all I used vag-com 311.2-N for the rest just follow steps

1. From Common select the Engine button (01-Engine).

2. In the screen that will appear, If I remember correctly, there is a button

(08-Meas.Block) press it.

3. It will appear a screen where you put the measuring blocks that you want log. You can log up to 3 blocks at the same time. Just put 120 in the first box and press "Go". This will give in real time the engine RPM and engine Torque (in Nm)

4. At the end of the form there is the "Log" Button. Press it and define the file where the data will be written.

That was the vag-com part. Now I would suggest doing the measurements together with another person (seating at back). I took the measurements in 3rd gear. Actually from 1st gear I went directly to 3rd gear and I logged the data from low rpm up to 6200rpm. When you reach the revs just press the clutch and wait until your speed drops.

5. Stop the data logging.

Now the Excel part. Rename the file to .txt and import it to excel. Import it as comma (",") delimeted.

In order to calculate HP you need to convert Nm (torque) to Foot pounds. Then use the following type to calculate the HP in PS.

HP = Torque * RPM / 5252

Use a XY Scatter chart to graph the results.

Hope I helped a bit.

Takis

Thanks a lot - that will help no end.

Whats the conversion from PS to BHP again? I seem to remember multiplying PS by .98 to give BHP

Thanks again

Rich

Or use this already made up spreadsheet, just copy and paste your info from a block 120 log into it.

http://www.ross-tech.net/vag-com/examples/Block_120_Tutorial.xls

Is a Block120 test best done with ASR on or off?

Might be a thickie question but Ive heard conflicting reports that a) Block 120 is a measure of ASR torque and It needs to be off for an accurate reading

Thanks for any clues

Rich

I would do it with the ASR switched off, although if you choose the right gear the ASR shouldnt activate anyway. On a rolling road with a 5 speed box the tester normally uses 4th, but unless you use a private test track you will be doing silly speeds before the end of the run.

That makes sense. I have access to a private road but even then 4th would be a bit hairy

Thanks & Rgds

Rich

Is there a block to log road speed at the same time?

There must be, does anyone know how many blocks can be logged at once, I think 3 but not sure.

Also, is there a a complete list of blocks, so far I know:

002 - MAF

115 - Boost

120 - Torque (ASR Derived)

Thanks

Richie

Is there a block to log road speed at the same time?

have you tried block 5?

Here we go (blatent lift from www.seatcupra.net)

001 Idle Speed Coolant Temp O

Top job thanks Goochie

Rich

Once again from www.seatcupra.net I note that block 120 is not that accurate for a remapped car. This seems to be true as my car only managed 169 PS on VAG-COM but 220 at Jabba. There seems to be a way to work out the difference but I'm not sure yet.

VAG-COM logged 214 lb/ft compared to 223 lb/ft at Jabba.

Tomorrow I'm going to try finding a block for road speed then do some speed runs. Though I could always calculate the speed from the RPM and gear I suppose.

It's more likely to be correct, based on seeing several posts where JBS rollers give MUCH lower readings than the Jabba ones. Dunno which ones are correct between those two, but I'd hazard a guess the ones nearer to the ECU readings will be the right ones

I doubt you'd see a difference of 50PS though. We've seen some difference between Jabba's rollers and those at AMD but never that much.

Edit to add:

Following some web-crawling of various sources, to get a more accurate figure you need to take into account the MAF readings for airflow. Basicially, in my instance this means multiplying by 1.31.

Revised power figure from VAG-COM is 218.77 bhp much much closer to what I was expecting.

Moved to new thread