Dyno charts what happened?
Thread Starter
Instructor
Joined: Feb 2004
Posts: 240
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From: Highlands Ranch Co
Dyno charts what happened?
I just had my car dynoed and where did my hp go? This is the first dyno chart:
As you can see I am suppose to be getting 409 rwhp acording to the dyno done by the shop that did my heads and cam, but just today I had a dyno done on a dynojet and got less rwhp than before.
The only changes that were done to the car was a highstall torque converter (vigalante 2800) and we reversed the cat and x-pipe location on my lg lt headers. How could this cost me 40hp? Something is fishy here!
As you can see I am suppose to be getting 409 rwhp acording to the dyno done by the shop that did my heads and cam, but just today I had a dyno done on a dynojet and got less rwhp than before.
The only changes that were done to the car was a highstall torque converter (vigalante 2800) and we reversed the cat and x-pipe location on my lg lt headers. How could this cost me 40hp? Something is fishy here!
Last edited by patmo; Jul 13, 2005 at 05:16 PM.
Drifting
Joined: Jul 2002
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From: Spring Tx
Two different kinds of dynos, one done by the tuner who installed your heads and cam, the second done with the addition of a TC that may or may not have been locked. Neither indicates whether they were corrected to sea level. Seems to be all kinds of reasons for different results to me.
Thread Starter
Instructor
Joined: Feb 2004
Posts: 240
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From: Highlands Ranch Co
The strange torque curve is from my torque converter not being locked-up till the valley. It was my fault not the installer. I do not know how to lock the converter with my hptuners while doing a dyno run. I also have my converter in third not locking till 65mph. I will change this next time I do a dyno run.
Thread Starter
Instructor
Joined: Feb 2004
Posts: 240
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From: Highlands Ranch Co
Originally Posted by lost
Two different kinds of dynos, one done by the tuner who installed your heads and cam, the second done with the addition of a TC that may or may not have been locked. Neither indicates whether they were corrected to sea level. Seems to be all kinds of reasons for different results to me.
Safety Car
Joined: Aug 2003
Posts: 4,988
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From: Hooterville, NJ
Originally Posted by lost
Two different kinds of dynos, one done by the tuner who installed your heads and cam, the second done with the addition of a TC that may or may not have been locked. Neither indicates whether they were corrected to sea level. Seems to be all kinds of reasons for different results to me.
Le Mans Master
Joined: Feb 2002
Posts: 5,970
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From: San Marcos Texas
Mustang dyno results vary alot. They are easy to fudge(or mess up) the numbers depending on the settings. We had a local 2003 Z06 guy have his car dynoed on a mustang dyno. It showed only 275wrhp. 
Same dyno different day showed my friends 96' with mods made only 202rwhp 
What a joke. I have never seen a mustang dyno be consistant in there readings. Dynojets are more accurate. I have had my C4 on 3 different dynojets and they were all within 4% of each other.. 
Same dyno different day showed my friends 96' with mods made only 202rwhp What a joke. I have never seen a mustang dyno be consistant in there readings. Dynojets are more accurate. I have had my C4 on 3 different dynojets and they were all within 4% of each other..
