So I finally got my car to the Mustang dyno today after slacking all summer.

I'm still up in the air on the results.

It put down 265 (after correction for barometric pressure, etc.)

AFR averaged 12.5 with a range of 11.7-14.3. From 4k rpm's through redline it was pretty steady between 12.6 and 11.7 - I don't have a scanner near me or I would scan in the chart.

I count my AEM intake as basically 0 horsepower until next year when I do actual work to the intake manifold, TB, and runners.

So that leaves my only real gains coming from exhaust mods - I'm running HFPC's, V3 j-pipe, and ATLP V2 quads.

265 still seems a bit low to me for a 6mt with those mods. I was expecting somewhere between 270 and 275.

am I off-base here?

 

mustang dyno is the heartbreak dyno.


Where the heck is the graph?

 

I will be scanning everything tomorrow when I'm back at work and posting it in this thread, for sure.

 

After further research on the forums last night, I am convinced the car is running way too rich. It backfires like a mofo so I knew it was running at least somewhat rich but at WOT 11.7 AFR it sounds like it is significantly off and should be closer to the 12.5-13

It sounds like the only way to really combat this is by wiring up an AEM FIC or going the JnR ECU route (and given the recent debacles in the ECU thread, I'm hesitant, lol).

In for anyone who has alternate suggestions.

Here are the charts:



and power:

 

Mustang Dyno's are more realistic numbers which will read lower than most dynos. Add 10% - 15% and you'll get dyno jet numbers of 290 - 304 whp but then I think that mustang dyno reads a little high. Seems like the dyno was already configured to make close to dyno jet's number.

 

its weird seeing it start at 3k RPM.

at 4k, there should be a dip as the butterfly in the intake manifold is opening.

at 5k, we see vtec kick in.

nice numbers.
as we cant really compare this to anything.

 

I don't see vtec dip.. keep watch on your spark plugs, they will be the ones to go first.

 

^no drop at vtec, silly.
theres an increase at 5k which we see

 

I met up with another Acurazine member yesterday who ran his type-s on the same exact dyno with identical mods to me except he doesn't he runs stock cats, and his Type-S is auto and he pulled 262. Given that mine is a 6mt, I should realistically expect to see significantly higher numbers - and the raw # isn't the main issue, it's that given the mods and how the car runs, I'm concerned when an auto can pull nearly the same power with similar mods.

The car still feels strong for sure - my buddy has an '08 TL-S 6mt with light modding and he was complaining about how much harder my clutch seems to grab and pull the car compared to his. On the street I don't really notice it, but I am 100% sure the car is bogging to some extent on how rich it is running.

I was going to check the plugs next, actually. probably going to do that this weekend.

 

then your dyno results are skewed.

you really cant compare this dyno chart to his.
but if everyone says your car pulls harder, then it must be true.

line em up and see who pulls.

 

Put your stock intake back on to get better AFR than the AEM intake you are getting.

Or you can track the TL and see what your trap speed is.

I wouldn't push it as often seeing your AFR rich.

 

its not gonna blow! ^

 

agreed. I'm not concerned about anything breaking. It's a bit rich but it's not like we're talking a super-lean 16.5 or 17 where engine damage could start to occur.

However, I do like the idea of putting the stock airbox back on until I can get my TB and manifold worked over. Will probably do that this weekend as well.

I'm wondering then, is it possible that the AEM intake is pulling in so much extra air that can't properly make it through the throttlebody that it could confuse the ECU and cause it to think there is a lack of airflow? That's the only way I could see the stock intake fixing the AFR problem, and in my head it is a legit theory.

 

You can say I'm the fellow AZ member who you stopped by and Im the one who also ran my car on the Dyno at that place with 262.7wp My dyno chart is in my album if anybody wants to compare them. See you Saturday and a few other AZ guys at my house for a AZ BBQ!!!

 

Its weird that when my v-tech kicks in you can substantially see the increase in hp.

 

agreed. i had a hard time looking at this graph.

 

If your thinking about the FIC.. I got one forsale in the black market

My friend has a mustang dyno which I use for all dyno and comparison of parts. My numbers are In my Sig. I put my car on a different dyno with no changes and the car put down more power. Elevation was different since I was also in NC. I got a 3.0 in my Accord so slightly smaller and lower compression

I go by mustang numbers and say everything else just reads higher.... but that's me being brand washed....lol