Chris Edwards

Has anyone dyno'd at CMS then dyno'd at A&A? I made 471/442 at CMS's mustang dyno then made 477/444 at A&A's dynojet after putting 1500 miles on the motor. It actually made 489/455 then Andy changed the correction factor to SAE and it corrected to 477/444. Curious if anyone has before/ after with these two dynos.

pauldana

Always wanted to do that... but really back to back...and see the difference..

your putting down some nice numbers though.. do you have a dyno graph?
I would love to see where your tq and hp peek numbers are and there spread... I am around 50 more hp and 50lbs more in TQ, in my C3 but never ran the 1/4 mile in it..(I road race). do you know what you are weighing in at? I am at 3100 lbs...
Just trying to figure my aprox 1/4 mile time... thx!!

Chris Edwards

And just to clear things up, I have only fantastic things to say about both CMS and A&A. Ryne was very thorough with his tune and his email follow ups and Andy had a million things going on and still was very happy to put the car on the dyno just for a test, with no tune (had no reason to tune the car as it runs great).

Car weighs 3080 without me in it and a 1/2 tank, I weigh 185lbs.

Here is the CMS (mustang dyno) graph:


And the A&A (dynojet) graph:

UBNZO6D

The difference is negligible so I wouldn't worry about it...It dispels that CMS's dyno is VERY conservative though...Your car makes lots of power, I would be happy.

Greg

pauldana

here is an overlay of your 2 dyno runs:



if you notice... the 6 hp is nothing more than a small "bump: at around 6K RPM... take that out and you are virtually the same... no diff

Chris Edwards

Paul, thank you for posting that. I can see that the curves are very close, the reason I made the post is because my car mph'd at the track a bit low (123mph) for the power it made and usually Mustang dynos are more than 1.3% low compared to a dynojet. Andy's first pull was actually 442rwhp/ 420rwtq, then he made two back to back passes and made 47x/ 44x. This past weekend however I trapped nearly 126mph so I have some investigating to do. I actually wasn't trying to do a comparison between the two dyno's, just get a perspective for my own trouble shooting.

cv67

Only way to know what your car will run down a track is to do it
To say my car makes "xx and xx therefore is a X sec car" wont work
too many variables. Interesting comparo though on brands of dynos

Chris Edwards

Agreed, but just like its fun to run at different tracks, it's also neat to dyno at different dynos