Sydney Dyno Day Results 21.04.07

[DubSteve]

I'm kicking myself that I missed it now, and I missed Lucas's A4 I heard that was crazy, stupid Porsche wheel

[thepowercosmic]

in my standard MK4 GTI my first dyno run was 93kw, chipped on the second dyno and got 98kw. work that one out

Hey VWEAPN,

There was another person with a MK4 GTI (the red one, not Fuzion's) that had similar numbers after their GIAC chip was installed - if I recall correctly he had a problem with the diverter valve. Once that was fixed, he was pleased with his numbers.

Possibly check your diverter valve.

[BL33SU]

yeah I have mate,but there are some niggling little gremlins that I have to track down(self incurred! Im not as good mech as I thought!hehe). (was on a mainline dynometer)
Isnt the the standard to use 4th here in australia?thats what I was told...

yeh i thought it was 4th gear aswell.. been told 3rd gear u get higher numbers, 4th gear is the closest 1:1 ratio or sum****.. not sure

[gpk_gti]

thanks for that! so was it on purpose that he did the dyno in 3rd??to get the higher numbers or is that just the way he does it?? think my next dyno will be there

[Timbo]

On my understanding, the gear used doesn't really matter -- either 3rd or 4th for 5sp, 4th or 5th for 6sp -- it is really just a safety issue. If you use the higher gear, the car sitting on the dyno is effectively doing probably 160+kph, and if it breaks loose!!! Safer to use a lower speed gear.

As each car was set up, you would have seen Todd doing some short runs to correlate the dyno and the car for indicated speeds vs actual. For a comprehensive tuning dyno, the operator will actually try to connect to the tacho, to get RPM, but that takes ages to set each car up, so road speed is used.

When you think about it, the gear used shouldn't make any difference provided there is a correlation between the car and the dyno, although there may be some factors which rule out using, eg, 1st & 2nd -- probably the tendency for slippage between the rollers and the tyres.

And yes, one of the ways to manipulate dyno results is with the correlation calculation...or not doing it all No evidence of any of that bs on Saturday

[DIDZ]

yeh i thought it was 4th gear aswell.. been told 3rd gear u get higher numbers, 4th gear is the closest 1:1 ratio or sum****.. not sure

Correct. Dyno should be at 4th as it is the closest to 1:1 ratio.

3rd gear gives an inflated figure. Gee, I wonder what figures I would get if I had did my dyno in 3rd !!!!!!!!!

1st Gear 2.670
2nd Gear 1.944
3rd Gear 1.308
4th Gear 1.029
5th Gear 0.837
6th Gear 0.000
Final Drive FD 3.389

If I've got any of the above wrong, please correct me.

Didier

[gpk_gti]

so 4th is closer to 1:1 right??? and if you did your dyno run in 3rd and wanted to compare someone elses run that was done in 4th you would divide the 3rd gear run x 1.3??
eg--- 3rd gear run = 150kw divided by 1.308= 114.6kw 4th gear run

or to convert a 4th gear run to compare against a 3rd gear run you would times the 4th gear run x 1.3???
eg 4th gear run= 100kw times by 1.308=130.8kw 3rd gear

RIGHT????
not trying to be smarty but most of the dyno places I have been and spoken to run in 4th and most forums here run in 4th.just comparing apples to apples.....

thanks guys!

[gpk_gti]

arrrggghhh,the more I read on the net,the more confused I get......

[VWEAPN]

ye the red gti was on about 115kw, might actually get in contact with him.

thanks powercosmic

[fuzion]

if your wanting to run on a MDX Dyno again, contact Todd or also Joe @ Crescent Motorsport in liverpool (9600-6229) as he knows his dyno's and will happily fit you in for a run or two

regarding dyno infomation http://www.ls1.com.au/forum/showthread.php?t=58222 which Todd himself from Mainline posted about corrections etc.

[SoVeReIgN]

Damn.. I just realised.

My CAI tube from airbox to frontbar wasn't connected for the dyno- It would have just been sucking in hot air straight out of the engine bay.

Silly me for not checking it before the car went on the dyno. (And well, not securing it well enough too)

[DubSteve]

if your wanting to run on a MDX Dyno again, contact Todd or also Joe @ Crescent Motorsport in liverpool (9600-6229) as he knows his dyno's and will happily fit you in for a run or two

regarding dyno infomation http://www.ls1.com.au/forum/showthread.php?t=58222 which Todd himself from Mainline posted about corrections etc.

It was a good day loved listening to the cars thats for sure, great to see a community out there and having fun. When is the next dyno I want in

[gpk_gti]

ok,thanks Fuzion! hopefully friday I will have some time to find that bloody gremlin ,then I can look at gettn the dyno done again

[fuzion]

There will be another one in 3 months, so to who ran now would be a great time to finish your projects/or start some so you can see the next result.

And it'll also be winter, so some great cold runs as well.

hopefully ill get mine sorted and get a bit more out of it too!

[DubSteve]

Can't wait for the next one hopefully with a service and Chip of some sought maybe even new cam I am hoping I can get the first two done atleast.