Actual Dyno Reading Correct?
04-01-2009, 11:04 PM
#1
3rd Gear Member
Thread Starter
Join Date: Jun 2008
Location: Orlando, FL
Posts: 978
Actual Dyno Reading Correct?
I got a dyno tune a while back on a mustang dyno. The numbers originally read 270 rwhp and 283 rwtq I believe. The guy who did the dyno said the mustang dyno reads 15% lower than what it actually should be, and that a dynojet is more accurate. What I did for my rwhp and rwtq in my sig was multiply 270 and 283 by 15% and added the difference on. Do my numbers seem right to you guys?
04-02-2009, 06:39 AM
#5
that's correct.
My car was also tuned on a Mustang dyno. When the guys finished with mine, they warned me that my "numbers" were going to sound low compared to others that get their cars done on other types of dynos (dynojet), but to understand my numbers were true rwhp.
JMO, but the only other thing I would say is that your signature should actually read 270/283, because those are your car's true rwhp/rwtq numbers.
My car was also tuned on a Mustang dyno. When the guys finished with mine, they warned me that my "numbers" were going to sound low compared to others that get their cars done on other types of dynos (dynojet), but to understand my numbers were true rwhp.
JMO, but the only other thing I would say is that your signature should actually read 270/283, because those are your car's true rwhp/rwtq numbers.
Last edited by 05 Mustang; 04-02-2009 at 06:44 AM.
04-02-2009, 07:27 AM
#6
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
If you want to post dyno jet numbers in your signature, then take the car to a dynojet dyno. This is almost as bad as correcting 1/4 mile numbers based on DA. Just post mustang dyno in your sig.
04-02-2009, 10:01 AM
#7
5th Gear Member
Join Date: Mar 2007
Location: Orlando, FL
Posts: 2,031
FYI, when something reads 15% lower than normal, you take the number you have and divide it by .85 . Adding 15% is not correct (since you are adding 15% of the smaller number, when in actuality, you need to be adding %15 of the bigger number)
270/.85 = 317.65
and to check, 317.65 x .85 (85% of the "dynojet" reading)= 270
270/.85 = 317.65
and to check, 317.65 x .85 (85% of the "dynojet" reading)= 270
04-02-2009, 10:11 AM
#8
2nd Gear Member
Join Date: Jan 2006
Location: Illinois
Posts: 415
You have nice upgrades. If you want big numbers you must Supercharge,Nos,Turbo your ride,or be happy with you car. Is it the way you want it? Fast enough? The next steps you take in improving your dyno times will be expensive.
04-02-2009, 03:44 PM
#10
3rd Gear Member
Thread Starter
Join Date: Jun 2008
Location: Orlando, FL
Posts: 978
Thanks guys...I will be getting a s/c probably the beginning of next year. I just bought the gf an engagement ring, and she doesn't know so I have to hold off a little bit on the upgrades on the car. It will eventually be a garage kept/weekend car when I get a crappy DD.