You'll need vag-com and MS Excel to do this, but that's about it!!



That's a second gear pull. Find a straight, flat road with no traffic. In a TDI, log Groups 005 and 006 simultaneously as you do a full throttle run from idle to redline in 3rd or 4th gear. At redline, push in the clutch and allow the car to coast as far as possible.

Get a download of the automatic calculation spreadsheet here:
http://homepage.ntlworld.com/dgace/images/data_stuff/tdi-dyno.xls

If you do get some results, please post them under this thread.
I'm gonna have a go over the weekend myself!

All credit to the author

Updated with data from my ISP server

FOXY

Edited by - foxy on 03 Oct 2002 18:58:43

WOW! Does this really work?

Cool! Anyone have any idea which datablock thats needed for a Throttle cable 2000 1.8T? I think the one which measures speed against RPM is Datablock 6, but its only 1 datablock that can be used! Me will definitely try this out! Looks cool if it works!




Shakini 1.8T
Koni Coilovers|UPsolute chip|RS Caractere Bodykit|TT Brakes|Remus Exhaust|Forge DV

Bobs drop us and email and I'll send you a complete list of the the data blocks.

Not married, not blonde!

Impressive...

My suggestion would be to do multiple runs, keeping as many things constant as possible... speeds, bit of road you're on... occupants in the car etc. do several plots and average em out... then average out the logged data values themselves & do another plot for comparison.

I'm not an expert, but there are a good few areas in the above process where inaccuracy & error could be introduced. It's unavoidable unfortunately. The only thing you can do is try to minimise their effect with repetition.

Of course, if you just want a whizzy graph, then one run is fine... that's all I'll be doing! 

 

knackers... sorry guys... I bananafingered to this post thinking it was a new one & replied before realising... I'm sure it'll soon sink back to the obscurity of page 2048 or whatever.

canny one for a bump though i guess, given the VAG-COM group buy :)

Top bump as I've spent ages researching the blocks to log for a dyno run in my TDi.

marriedblonde:

Bobs drop us and email and I'll send you a complete list of the the data blocks.

Not married, not blonde!

 

Bit of a long shot but dont supose you've got that list still do you?

just to let every one no it dont work on mapped cars

Why?

Yes it does as its only doing a calculation relative to speed time and mass and deceleration..

That is what I am thinking!

intresting thread

I thought you were supost to do this in 3rd on tdis as thats what vagcom and vw say to use to check boost levels etc. or ay i being blonde?

Nice bump! Graph saved and will give this a go sometime

what measuring blocks do you need to log to do this?

any chance of getting the graphs back up at the top of this thread?

also is this the page i need..... http://www.ross-tech.com/vag-com/tour/logging.html

 

thanks

Andy

 does this work at all? i did the logs tonight using measuring blocks 5 and 6 for my tdi. so i have the logs saved. but the link foxy gives in the first post for the automatic calculation thing doesnt work. the link doesnt exist anymore.

so does this work at all? as i would like to try and work out the readings i have.

thanks rob

rob_arthur:

so does this work at all? as i would like to try and work out the readings i have.

thanks rob

 

Same!

 anyone, surely someone on here knows if this works and if not how to do it.

would be a great help. i have searched the forum but come to no answer.

thanks rob

 OK... I have a copy of the graph spreadsheet... i don't wanna post or link it because ultimately it's not mine & the link may have been removed for a reason.

PM me an email addy...

I'm interested in knowing exactly what to do in VagCOM to log the numbers necessary to use it properly. I've got VC & the cable and stuff but have never used it. If anyone can help me with clear instructions on the VagCom part, I'll help them with a copy of the spreadsheet.

Fair do's?

 hi there pm sent.

 my mate just sent me this link,  could be just what we are all looking for.

may spend a day on it next month

http://72.232.196.98/~dpham00/gti/vagcom/Vag-com%20Logging%20and%20Graphing.pdf

 

 

 

Has anyone tried this yet?

 Looks good skier andy.. however the table provided shoes boost at Rpm not BHP.. although doing that looks fun too im sure with some play and manipulation in Excel i should be able to work out bhp using some different variables!