Dyno results - what to do next?

[indimini]

I just had my 05 MCSC dyno'd at Mt. Airy Motors (in Maryland) on a Mustang 1750 dyno. My car has a 15% pulley, ProMINI CAI and AmD One-Click software.

Environment was about 60 F and 90% humidity.

My peak HP was 136 at the wheels, and max torque was 124 lb-ft. These numbers seem low to me considering the mod's done to the car.

The engine HP climbs solidly up to 6400 RPM.

What is particularly troubling is that the torque drops dramatically between 4,000 and 5,200 RPM, corresponding to a drop in the AF ratio. Torque maxes @ around 4,000 RPM (124 lb-ft) and is down to 115 lb-ft at 5,200 RPM.

I'm curious to know if that drop off is typical or if I should consider dropping the AmD software and go the Unichip route.

Honestly tuning is new to me so any input/thoughts is greatly appreciated.

[CoryB]

My first guess would be that the ECU mapping is either corrupt or just inaccurate. Why not return it to the stock mapping and re-dyno to see what you get?

With a 15% pulley and CAI you don't HAVE to have a remap, so try it that way first and see what happens.

[indimini]

I am thinking I should schedule another run with the stock program. They disconnected the battery prior to the run in order to install an 02 sensor in front of the cat -- is is possible that either caused the ECU remap to be lost causing the ECU to revert to the stock program?

[CoryB]

Quote: Originally Posted by indimini

I am thinking I should schedule another run with the stock program. They disconnected the battery prior to the run in order to install an 02 sensor in front of the cat -- is is possible that either caused the ECU remap to be lost causing the ECU to revert to the stock program?

Disconnecting the battery would clear the adaptive memory that learns how you drive. But it won't affect the actual ECU flash program.

In fact, some people always reset the battery before dyno runs to eliminate the variable caused by the adaptive memory.

[MiniService]

Quote: Originally Posted by CoryB

Disconnecting the battery would clear the adaptive memory that learns how you drive. But it won't affect the actual ECU flash program.

In fact, some people always reset the battery before dyno runs to eliminate the variable caused by the adaptive memory.

While possible this is not always true and generally does not reset the adaptations

[shazam]

Was there a big fan to feed the intercooler- if not the system will not reflect on the road performance i recon.

[indimini]

They did have a big fan that they used after the first pull. I did wonder if that could be one of the issues. I thought I'd read somewhere for example, that the BMP CAI benefits aren't seen w/o the airflow simulating the road conditions.

[MINI-Morgan]

sounds like it isnt being fueled right..... ECU map problem or somehow blocked injectors. You are using 97/98 Octane fuel right?

[aquaanox]

im getting the exact same upgrade done tomorrow, on a 05 mcsa however) 15%
and BMP Promini intake. Did you ever figure out what the problem was with the dyno results ?

[indimini]

Quote: Originally Posted by aquaanox

id you ever figure out what the problem was with the dyno results ?

Not really. One possible (major) problem was that there was very little air flow to the CAI and SC during the dyno. I think it may not be a fair test to have run with a small box fan -- there's no way that the fan could reproduce the air flow being forced into the engine bay you'd see in real world conditions.

I also may have a leak around the intercooler -- there were some very odd noises coming from the car the other day that may be an indicator of such a problem.

I noticed you are in the DC area. Where are you having the pulley installed or are you doing it yourself?

[aquaanox]

Getting it done at Towson, bought the parts from sterling. Towson is my dealer but they didnt have the parts in stock and they are backordered on mini mania.com.

[Paul]

Also consider that some maps, pulleys, intakes and exhausts may not all get along. I'd imagine that if a map is designed for car without a pulley, or without an intake, or both, then it may not give the best mix for a car with a smaller pulley and/or intake (for example).

[MINI-Morgan]

I've heard that the intercooler seals can leak under heavy boost and in some cases come off....but not confirmed.

[aquaanox]

Its done! See my review in the MCSA forum..

~thanks for the info here all.

[s_and_m]

Try sticking your hand out of the window at 6000 rpm in 5th - it creates a bit of drag. Now consider if the the fan placed in front of your car during a dyno run could create the same effect.

Temp, dyno settings, airflow, humidity, altitude etc will have an impact on your figures. 136 at the wheels sounds like approx 160 at the flywheel.

S