, hang the ****'s
Dyno Manipulation ??
Thread Starter
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
Dyno Manipulation ??
What happens if you dont input the correct weight of the vehicle on a mustang dyno ? If a c4 weight roughly 3450 lbs what happens if you tell the dyno the car weighs 3100 or even 3700 ??
Race Director
Joined: Oct 2001
Posts: 19,654
Likes: 429
From: Melbourne Florida
Cruise-In IV Veteran
I have a friend who ran a dyno for some years...he told me he could make it show whatever rwhp and tq he wanted to...he also told me that some shops who did mods and had a dyno would "tweak" the dyno to show nice gains for the mods they installed...
Team Owner
Joined: Jan 2006
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From: Hampton, VA Yea, i'm a redneck... but you love it
Cruise-In 8-9 Veteran
aka/Trunk Monkey/Banned For Life/Corvette For Life
Melting Slicks
Joined: Oct 2000
Posts: 3,426
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From: Heidelberg PA
Cruise-In V Veteran
On a mustang - the lower weight gives higher HP & Torque #'s.
I use to go to a mustang dyno and we ran it at 3300lbs(Stock), then ran it at 3100, do to weight reductions. The dyno does use the #'s in it's HP calculations and same day, withen minutes the lighter weight = higher HP & torque #'s.
I use to go to a mustang dyno and we ran it at 3300lbs(Stock), then ran it at 3100, do to weight reductions. The dyno does use the #'s in it's HP calculations and same day, withen minutes the lighter weight = higher HP & torque #'s.
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Thread Starter
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
On a mustang - the lower weight gives higher HP & Torque #'s.
I use to go to a mustang dyno and we ran it at 3300lbs(Stock), then ran it at 3100, do to weight reductions. The dyno does use the #'s in it's HP calculations and same day, withen minutes the lighter weight = higher HP & torque #'s.
I use to go to a mustang dyno and we ran it at 3300lbs(Stock), then ran it at 3100, do to weight reductions. The dyno does use the #'s in it's HP calculations and same day, withen minutes the lighter weight = higher HP & torque #'s.
I'm starting to believe it doesn't have an effect on the #s and the load just helps for real time tuning on the dyno, like for timing etc.
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
TJwong would be good to answer this question.
You can't fool a dynojet unless you screw with the weather station. When you do that you can see the inflated correction number. IE a normal correction would be 1.02. If all of a sudden your final run is corrected 1.06 you know you have some foul play.
You can't fool a dynojet unless you screw with the weather station. When you do that you can see the inflated correction number. IE a normal correction would be 1.02. If all of a sudden your final run is corrected 1.06 you know you have some foul play.
Racer
Joined: Dec 2006
Posts: 325
Likes: 2
From: Chattanooga TN
the STATIC vehicle weight should have no impact on the tq/hp figures obtained from the dyno...
only changes in ROTATING mass could influence the chassis dyno.
for example, installing lighter wheels and tires onto the rear of your car would cause slightly higher readings...
only changes in ROTATING mass could influence the chassis dyno.
for example, installing lighter wheels and tires onto the rear of your car would cause slightly higher readings...
Burning Brakes
Joined: Apr 2005
Posts: 1,110
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From: JUPITER FLORIDA
If you take 2 vehicles and they have the same engine and drive trains, they will both put the same numbers to the wheels. Now if you run them at the track, the lighter vehicle will have the better times. Am I wrong?
