Dyno'd my 1996 cobra- need help deciphering results

93GTDIN · 10-11-2003, 05:15 PM

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

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.

Murdock · 10-11-2003, 09:40 PM

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

93GTDIN · 10-12-2003, 01:04 AM

no such luck.

WHITE_SVT_SNAKE · 10-14-2003, 02:57 PM

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....

Snakeman · 10-17-2003, 12:36 PM

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.

10-11-2003, 05:15 PM	#1
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	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 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. __________________ 96 Cobra - a bit too stock. 14.0 @ 101

10-11-2003, 09:40 PM	#2
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	Do you perhaps have the wide band o2 with this dyno run? __________________ LARZRACECARS larzracecars.com

10-12-2003, 01:04 AM	#3
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	no such luck. __________________ 96 Cobra - a bit too stock. 14.0 @ 101

10-14-2003, 02:57 PM	#4
WHITE_SVT_SNAKE Registered Member Join Date: Aug 2003 Location: Dublin, GA Posts: 29	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.... __________________ 1996 Mustang Cobra Ported Factory Heads, New Performance valvetrain , BBK 62MM TB, Sean Hyland Spec Stage One Cams, Dual Friction Centerforce Clutch, Steeda Tri-ax, Mac Cold Air, Saleen Wheels (18x9 & 18x10), Among other things... "I Like anything Fast Enough to Do Something Stupid In"

10-17-2003, 12:36 PM	#5
Snakeman Registered Member Join Date: Apr 1999 Location: Grass Valley, CA, USA Posts: 1,389	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. __________________ LX ~vs~ Camaro

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