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.
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?
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.
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?
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).
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