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LeeP Of SRD Big Twins Supra on the Dyno today!


JamieP
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Great result Lee :thumbs:

 

The dyno is very trick indeed, I like the fact you can program how long you want the run to be and once setup you can just sit there with your foot down and it regulates the load on the car to provide a given load cell over the rpm range.

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Thanks guys. :)

 

 

Nice figures.

 

Reason I ask is that we have generally regarded hub dyno figures as being high. In the past hub figures could pretty much be taken as flywheel figures. Just checking if TDI's dyno was the same.

 

I know what you saying about hub dynos, thor's was bad for that as the dyno graphs you got from them said flywheel hp although they said it was at the hubs.

 

The good thing about this dyno is it can be calibrated with weights, they have a long bar with a weight on the end which allows them to get it spot on.

 

The problem with a rolling road is there is always going to be a bit slip with the tryes and with big horsepower you just cant get an accurate reading.

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Here is a bit of info on the Rototest dyno used:

 

 

"Rototest is the only hub mounted chassis dyno that actually measures torque as opposed to calculating (or estimating) the figures. For this reason, the Rototest is also the only hub mounted dyno that can be accurately and regularly calibrated.

 

 

Rototest actually invented the hub mounted dyno system and held the patent for this design. Being directly bolted to the wheel hubs, all issues, difficulties and inaccuracies associated with the suspension camber and toe calibration, tyre slip and carcass deformation, changes in temperature/pressure and the danger of explosion etc are all completely eradicated. There is also an important consideration concerning the potential for undetected tyre damage caused by rolling roads. These are the reasons why we do not use a “rolling road”

 

 

The Rototest dyno has superior control over any other type of dyno that we have seen. Not only is it able to vary the load by extremely small increments and ramp rates, it can also hold the vehicle at a predetermined rpm set by the operator regardless of throttle position. This allows the operator to have total control of the engine which means that we are able to accurately map and tune cars to the degree that no other chassis dyno allows. Both steady state and constant load testing can be accomplished with confidence, and the results can be corrected to any universally accepted scientific standard.

 

 

The Rototest Data Acquisition Centre is without doubt one of the most sophisticated and comprehensive scientific quality monitoring systems available anywhere. This allows us to monitor and capture data in real time and record all of the crucial information flowing from the engine, which ultimately provides confidence in our ability to deliver the expected outcome of an accurately calibrated engine. "

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Sounds pretty good...

 

Another good comparison would be your terminals.

 

 

Would be good if you take it on the strip again to see what improvements you have on your terminals, to see a real world performance difference.

 

Yes that should show the difference, even if I cant get it off the line the terminals should be improved. :)

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Drag radials on order Lee? ;)

 

Already got the wheels, just need the tyres.

 

Cracking result. Congratulations man.

 

Cheers

 

Should be in the 10s now :cool: especially with them wheels and tyres that Jamie has run a 10 with ;)

A side by side run with Dude should be interesting :eyebrows:

 

The problem is going to be the lag on the line but it certainly has the power now. I would be happy with a low 11.

 

Its more of a top end car really, looking forward to the thunder road if I can get in. Try and break the magic 200 mph :)

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