Just saw a dyno pull of a stock evo with custom Dynoflash that peaked at 232/235. This seems awfully low. What does the Filter Mode and Filter Value mean. On this one the mode is FIR and the value is 99. Any insight anyone?

 

Mustang dynos read low.

To put it in perspective, a 320 crank HP Audi S4 dynos at around 235 whp on a Mustang. So those figures seem about right for a stock Evo with custom dynoflash.

Dynos are only good for gauging relative power gains before/after modding on the same dyno. You can't really compare figures generated by different types of dyno run under different ambient conditions.

 

you can pretty much add 10%-12% number increase on a dynojet. Those precentages are pretty damn consistent too. I dynoed 352awhp and 320lb torque @ 21psi on a mustang dyno...on a dynojet i did 393awhp and 356lb. torque. The mustang is "load bearing" which simulates more road like conditions I am told.

 

The FIR is just a smoothing factor. On the newest software 99 is a common value. That value will not affect peak numbers. The 10% - 12% difference from a dynojet to Mustang as stated above is pretty accurate.

 

i hit 248/240 on the mustang with 3in. turboback, safcII, ic pipes, intake, boost controller 20psi.

Stock evos pull like 206whp-210whp.

 

i hit 238 whp 256 ft-lbs on a mustang with a moderate tune:
stock cat
91 oct
cat back
dp
injen intake
19 psi/mbc
safc 11
i was told with a cat delete and a more agressive tune i would get about 40 more hp!
keeping it safe to use my warranty, free oil changes, alignment and check upetc

 

Most bone stock Evo's are 199 hp 205 torque. We have tuned 5 so far these past two weeks. After just AEM and nothing else you will see 253/261 average

 

Filter mode has nothing to do with power gains or losses. It makes the graph a little more presentable to the naked eye. The point is to make sure that it is SAE corrected, scaled properly, weight is on the money and HP at fifty number accurate. This dyno is the most accurate road simulating tool around. IT WILL tell you exactly what you are doing on the street, not on a couple of heavy rollers in a garage somewhere.

 

54 whp from just electronics and no change in boost?

 

That is incorrect. That is why everyones results should be printed in SAE corrected form. That takes into account a standard form of measurement for ambient temp, baro and humidity.

 

Boost pressure is kept to 19-20 psi the whole run thru the use of the factory solenoid. YUP The cars are tuned right. PNP is a great thing

 

I don't know what PNP is. I just found it hard to believe there is 54whp (75bhp?) to be gained just from adjusting A/F ratios in stock form, without opening up the air flow restrictions (intake/exhaust). Perhaps I don't understand the degree to which you can tune with this device.

What do you mean by this? You are able to keep the boost from tapering and the BOV from leaking and/or opening prematurely with AEM?

 

PNP = Plug and play
Is that what other tuners do? A/F corrections or adjustments? The AEM is a complete EMS. We adjust EVERY parameter possible till we squeeze every ounce of power out.

The boost pressure spikes to 20 psi when at wide open throttle and stays at 19 the whole run. Completely steady.

Where are you seeing the restrictions that don't allow you to get 260 HP out of this car stock?

 

Well, A/F is the primary thing, since the Evo runs very rich from the factory (after 5200rpm). Timing and knock are other things, but they are both related to each other as well as the A/F tuning. I don't know what other parameters allow for so much extra hp.

Because of the AEM? Normally, when relying on the stock solenoid, the boost hits 19 and tapers to 16 (03-04).

The stock airbox/filter, the downpipe, the cat, and the muffler? I'm pretty sure I can get 260whp on my MR with just the S-AFC I have installed, but that would be on a Dynojet. I don't see any way I could do it on a Mustang Dyno.

 

so a stock evo with 3/4 tank of gas w/ no one in the car should weigh..... 3300 lbs. give or take a few lbs.

well, the Evo in question was entered into the dyno @ 3475 - Can this throw off the numbers?