Hey Freak
I started a new thread so we don't disrupt the 60-130 one

Have you read what I wrote above ? I am guessing that English is not your first language, if so then I can maybe understand that you are not understanding correctly what I am trying to explain ?
In answer to your question above - YES, that is sharing my experience, the experience of putting a turbo Porsche on a Maha at Manthey (who has the best cooling facility in the world which can do a good job at replicating road conditions), documenting it and sharing what cost me plenty with other enthusiasts - I have a set of Manthey Maha dyno curves and RS Tuning engine dyno curves for the same engine so I can educate myself on the vagaries/differences in dyno measuring....

Please answer me:
Do you think any of what I say above is unfair/misleading/uneducational/hating ???? What exactly are you getting at

 

No question: the Maha dynos are excellent replicating road conditions. Keep in mind, however, that dyno tuning is just one part of Tym's tuning programs, and that these kits are built to run on the streets, not a dyno. Any dyno results are just that: DYNO results that mean very little if the numbers aren't there to back up the pretty graph.

I don't think you're "hating" at all by posting that.

 

One of the very common internet induced fallacies are that of a dyno is like a ruler. Unfortunately a dyno is a measuring tool created for tuning, while one day your car may have 400hp at X dyno, it will have 370hp at Y dyno two weeks later. A dyno is merely a tool to use to tune a car and is in no way a definitive answer regardless of conditions. You could dyno a stock civic and make it read 400hp through a corrective factor while it simply isn't. A dyno is solely for checking increases through things you change at the shop the same day and while they are close they are never ever ever 100% accurate.

 

For chassis dynos you are of course correct although Manthey Racing has probably the best set up for capturing DIN hp with a comprehensive cooling system:



Engine dynos can be made as good as 100% accurate until one gets into the interpretation of DIN hp for turbo engines. Most critically at what temperature does one allow the IAT to be on a turbo engine ? and then when that (varying as the revs increase) temperature is known which temperature is used for the DIN correction factor, is it ambient or is it the actual post intercooler boosted temperature ? All can make a significant difference to the measurement numbers.

RS Tuning have a parculiar and strangely Germanically anal annual ritual where on a set day they take an engine they have just measured off their engine dyno rig and put it in the back of a van and drive it straight up to Weissach where, same day it is bolted onto Porsche's own engine dyno - beers are consumed and much back slapping when the numbers are within a few hp/NM, which they always are...... The RS guys actually told me that the way Porsche measure and quote turbo DIN hp is strictly NOT correct to the DIN standard !!!

A good way away from chassis dynos 6 second power runs but it is impressive how Switzer manages to get these very high hp cars running so well using these other methods....