The weight doesn't make THAT big of a difference... a few hundred pounds = 3-6 hp on average (we've tested it on my car a million times here)
Second, when I was stock I dynoed 207/215 whp/wtq on the Mustang here

 

I've seen dyno pulls for several stock and modified Evos on our local Mustang dyno. Stock Evos are generally putting down between 200 and 220 awhp. Modified Evos here have hit as high as about 380 awhp (?) - that was an RS with an AEM EMS and a GT35R, I believe. My car has personally put down 310 awhp with a blown head gasket (problems from the shop that ported the head) and a stock turbo. I expect better numbers when I get back there next week.

As for temp and barometric presure; the inputs for those are mounted on the side of the computer cart attached the dyno I use - no manual input is required.

 

The EVO runs rich once in boost. There isn't just a certain rpm. You would be amazed how much timing plays a role in this thruout the entire rpm band.
I won't get into too many specifics on the open forum but you are more than welcome to come to the shop at any time and discuss this further. We are very familiar with the stock mapping that comes from the factory. There isn't one load and rpm site that hasn't been adjusted. I start with a completely blank map. Meaning both A/F, ignition timing, cold start and enrichment, Air temp scaling, knock threshold, etc. Everything is done thru calculations ont he table first.
I mention the stats above for the stock evos as an average only. We have seen a couple come in at 210-212 hp. Bone stock. Please dont forget that many factors are taken into concideration when dealing with the stock computer. Mainly drive cycle long term correction. EVERY EVO will be different when it comes onto the dyno. The funny thing is that every single one that has left with an AEM is about spot on with each other.
Also your boost tapers on the stock EVO because it is designed to do so from the factory and in the stock ecu.
Have you ever measured the backpressure in the stock evo exhaust? Do you know how much CFM a piece of 2 1/4" piping can flow at a specific rpm?
Don't get me wrong, improving the breathing capability of the EVO will DEFINATELY yield much better results. But we are only talking about 260 whp. That is btw the max we were able to get from the vehicles.

 

For the sake of being completely accurate we put the vehilce on pads to find out for sure. But the weight figure would have to exceed 500 lbs or more to show any huge difference. We have seen both the HP @50 and the weight cause the numbers to skew about 20 hp.

 

dryad I think I know where you had this done.. I put my vishnu stage 0 Evo and a stage 1 S4 on it on the same night..

I got 215whp and 230wtq. I want to head down again soon now I'm at stg0+ and once I am sure I have all my boost leaks fixed.. They owe me some dyno time.

 

Mustang dynos are more REALISTIC than dynojet as they are loaded the entire time to simulate real world conditions. A Dynojet just works by rotating a weighted drum...when the drum starts spinning, however, it has its own inertia meaning the car doesn't have to do as much work to keep it spinning, hence a higher performance number in the end.

 

Thats 100% correct

 

Ressurected. ^^^^^^ from the dead
I recently came across this same question that the OP never got answered. On a mustang dyno what does the Filter Value mean mean right under the to the Filter mode: Fir? Look at a mustang dyno chart and it will be at the top to the right of the time and date printed.

The reason that i ask this question is that I had my car do 3 pulls on the dyno on saturday and the tq curve looks nothing like a stock turbo tq curve<<< which is what Im on. The tq curve was mainly around 5-7k when i've normally seen a stock ix turbo come in strong around 3.5k hang out for a minute then die off at about 5k.

The mustang dyno i ran on was on a 100 filter value. I've run on another mustang dyno that was on a 50 filter earlier this year and it looked like a more typical tq curve as i mentioned about the stock ix turbo. Buschur uses a 60 from what i've seen and AMS uses a 6 Filter Value.

This in no was is ment to be a contest over who has the best numbers or best shop. I just want to find out what these Filter Values mean.

This link shows a tq curve that i would expect out of a stock ix turbo:
https://www.evolutionm.net/forums/ev...ml#post8651504

I know this is a Evo X on e85>>> Im just saying this is what im talking about note the filter value at the top.

 

i only dyno'd 297 awhp on 24lbs of boost, TBE, intake and piping, MBC and a ECU reflash from my buddys car, was running 12.4's . i believe MD numbers are more accurate tho

 

so a mustang dyno is basically real world conditions and dynojet and those kinds of dynos are more... if you're not on the road? i don't really understand

 

why are you running a tune from a different car
i would turn the boost down and actually tune the car, just because you run 24psi doesnt mean it will make more power than 22psi

 

it wasnt permanent, it was to get rid of fuel cut, we still drove around n tuned it, afr's n checking for knock, had it tuned multiple times since.

 

08' GSR, Stock Turbo, AEM Intake, HKS BOV, No intercooler piping or exhaust, both stock. 291 whp on the mustang. 22 psi

 

^LOL

Welcome to the forum.

 

Why did you bump such an old thread?

Also those numbers mean nothing, I put down 390whp 380tq on a mustang dyno before cams and retune and then went on a dynojet and put down 375/355