Different dynos = different results
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
Different dynos = different results
I had my '93 dynoed at one local place 2 weeks ago and the results were 311.2 rwhp and 314.2 rwtq. I felt these numbers to be low, so I took it to the place where I had originally done my baseline (280 rwhp with headers and exhaust only). My results today were 322.08 rwhp and 325.07 rwtq. Conditions were similar except that today it was about 10* cooler. What do you experts think?
Thread Starter
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
Both were dynojets. Mods are Hotcam, ported Lt1 heads and intake, 1.6 rr, 52mm tb, HD timing chain and updated Opti, new Ford injectors, EM longtubes, RT cats, and 3" B&B catback and chip. Other old parts were replaced (O2 and other sensors, plugs, etc.). 3.54 gears and 2500 stall converter.
Melting Slicks
Joined: May 2002
Posts: 2,670
Likes: 4
From: Severna Park MD
Originally Posted by Lichen
I had my '93 dynoed at one local place 2 weeks ago and the results were 311.2 rwhp and 314.2 rwtq. I felt these numbers to be low, so I took it to the place where I had originally done my baseline (280 rwhp with headers and exhaust only). My results today were 322.08 rwhp and 325.07 rwtq. Conditions were similar except that today it was about 10* cooler. What do you experts think?
My last time out at a group dyno my raw numbers were stronger than the raw numbers from a previous run, but the corrected SAE number was down. The day was warmer the second time, but drier air. I don't trust the inputs of the weather station they have, or the correction algorithms.
The setup of the dyno software can also affect the corrected numbers you get, either innocently or deliberately. For instance if the shop is actually at 1500 feet the operator can say it is located at 3500 feet and give you more pleasing corrected numbers. I've been told that some dyno tuners actually alter this setting during a tuning session to exaggerate the improvement they have made by tuning. I've just been shown the setup and have no names and make no accusations. It is possible though, and the parameters involved don't show up on your results printout.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Lots of variables to think about when you put it on a dyno, some of which are not properly corrected for.
Air temp, humidity, whether or not they put a fan in front of the car, mustang/dynojet, etc
Air temp, humidity, whether or not they put a fan in front of the car, mustang/dynojet, etc
