Dyno'd my 1996 cobra- need help deciphering results
 

Okay here's the background info. I am unable to runa nything quicker than a 14.1 with no MPH better than 100. Pretty poor numbers given the car: 1996 Cobra.

Mods:
BBK O/R H pipe
Pro-Flo catback
K&N filter
3.73's
Tri-AX
C&L Radiator
Wheels/Tires

http://home.austin.rr.com/flobo/Cobra_Dyno_001.JPG

Notice the intense breakup after 5 K. The car feels like it has spark blowout or perhaps the computer is pulling timing. I'm trying to figure out what is going on, cause 266 RWHP is waaaay low for a cobra with O/R exhaust. I was expecting at least 280 rwhp, but that number doesnt bother me. Its the fact that power drops off after 5,500 and fluctuates so badly. You could actually hear the car making noises corresponding to the dyno graph.

Kinda sounds like a miss.

Any help or experience at all is greatly appreciated. I want to hear everybodies thoughts.

Do you perhaps have the wide band o2 with this dyno run?

no such luck.

Questions
 

Are you the Original Owner? If not, is it possible that they adjusted the timing or put a Chip in it? Have you checked and or replaced the Sparkplugs, wires, and coilpacks...? Do you have any kind of Aftermarked ignition (MSD, ACCEL)? Has your Mass Air Meter Been calibrated for new injectors or tuned at all? Have you checked your O2 Sensors (the front ones)...? How about the Air Filter, is it new or does it need cleaning? How about your fuel pump... Could it be defective...? Just some things to think about.... Let me know how it goes, I have a 96 Cobra my self.... I'm Curious....

clogged K&N?

what fuel were you using?
i had a similar look to my dyno chart until i put in some race gas.
that smoothed everything out.