Ways to FOOL the DYNO
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From: Cantonment, FL
Ways to FOOL the DYNO
I'm wondering the different ways to effect the outcome of power numbers that are calculated through a dyno.
One thing that i'm curious about is tire size, tire pressure, and the amount of pressure the tires have on the roller after being strapped down.
I'm running 225/45/16 sized tires. If i ran 205/50/16 (roughly the same height), that would mean i had less of a contact patch on the roller, could that theoretically effect my results?
what about running smaller diameter wheel say going from a 16" to a 15"?
so we got tire pressure, tire width, height, torque strap pressure.
Dyno calibration and features on the dyno are not of concern with this thread. The dyno has been calibrated correctly and the temperature and humidity are constant.
One thing that i'm curious about is tire size, tire pressure, and the amount of pressure the tires have on the roller after being strapped down.
I'm running 225/45/16 sized tires. If i ran 205/50/16 (roughly the same height), that would mean i had less of a contact patch on the roller, could that theoretically effect my results?
what about running smaller diameter wheel say going from a 16" to a 15"?
so we got tire pressure, tire width, height, torque strap pressure.
Dyno calibration and features on the dyno are not of concern with this thread. The dyno has been calibrated correctly and the temperature and humidity are constant.
Honda-Tech Member
Joined: Nov 2004
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From: St. Petersburg, FL
Re: Ways to FOOL the DYNO (98vtec)
What kind of dyno?
If you want high numbers find a dynojet. They are good at that.
Yes tire pressure and tire size will make a difference. Although between those two sizes you are reffering to i highly doubt you will see any difference.
If you want high numbers find a dynojet. They are good at that.
Yes tire pressure and tire size will make a difference. Although between those two sizes you are reffering to i highly doubt you will see any difference.
Thread Starter
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Joined: Oct 2002
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From: Cantonment, FL
Re: Ways to FOOL the DYNO (ftnjun2x)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ftnjun2x »</TD></TR><TR><TD CLASS="quote">why do you worry so much about them tires? It's not gonna give 50hp more. </TD></TR></TABLE>
if you dont want to contribute to the thread, please stay out.
this topic is to bring about the variables of dyno numbers.
if you dont want to contribute to the thread, please stay out.
this topic is to bring about the variables of dyno numbers.
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Joined: Sep 2003
Posts: 561
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From: port st lucie, florida
My dyno has a feature where it calculates gear ratio so it will take the tire size variable out of the equation, but tire friction, how hard the dyno is strapped down will make some difference, i've seen some pretty big (50hp) changes from tire pressure/strap pressure changes(not on my dyno, on a dynoJet), but that was on a car that was making 1200 hp, i doubt it would change more than 5 hp on your typical swapped civic, If the cars making that much power where you have to strap it down that bad, i doubt the losses will really matter, unless your trying to be a dyno queen.
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