Silly Question - Toyota Yaris Forums

Nutzoids · 05-15-2007, 01:51 PM

When you are doing a Dyno on a car that has a CAI aren’t you down playing the overall performance?

The faster you go the more air gets to the Intake... yada yada yada... But when it's sitting still on those rollers there is no extra air flow, right?

Or do most places have a giant fan that spins in conjunction to the Speedo, so that it would better simulate real world conditions?

I don’t even know if any of this makes sense… But hell I warned you it was going to be a silly question!

eTiMaGo · 05-15-2007, 02:18 PM

hmmm if you have a ram air intake, where the rushing air is force fed into the intake, yes, it could cause a difference. For more normal intakes, they are shielded from incoming air, so it's not a big factors. Most dyno places I have seen do keep fans blowing at the cars, mainly to prevent them from overheating!

falkor_99 · 05-15-2007, 02:38 PM

I hae seen lots of pictures and videos of people doing Dynos with huge fans in front to simulate the air coming in. But you brought up a very good point, never would have thought of that.

05-15-2007, 01:51 PM	#1
Nutzoids View User's Garage Drives: 07 Yaris Liftback Join Date: Nov 2006 Location: Philadelphia Posts: 938	Silly Question When you are doing a Dyno on a car that has a CAI aren’t you down playing the overall performance? The faster you go the more air gets to the Intake... yada yada yada... But when it's sitting still on those rollers there is no extra air flow, right? Or do most places have a giant fan that spins in conjunction to the Speedo, so that it would better simulate real world conditions? I don’t even know if any of this makes sense… But hell I warned you it was going to be a silly question! __________________ *Philosophy of life... Brought to you by... "Nutzoids" Nutzoids... Where Punk rock is less about Image, and more about the Mind!

05-15-2007, 02:18 PM	#2
eTiMaGo vroom vroom View User's Garage Drives: lil red 5-door Join Date: Sep 2006 Location: Bangkok, Thailand Posts: 7,744	hmmm if you have a ram air intake, where the rushing air is force fed into the intake, yes, it could cause a difference. For more normal intakes, they are shielded from incoming air, so it's not a big factors. Most dyno places I have seen do keep fans blowing at the cars, mainly to prevent them from overheating! __________________ The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ...

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05-15-2007, 02:38 PM	#3
falkor_99 Drives: 07 Yaris Blue HB Join Date: Apr 2007 Location: OC Posts: 234	I hae seen lots of pictures and videos of people doing Dynos with huge fans in front to simulate the air coming in. But you brought up a very good point, never would have thought of that.