Well, I had another disappointing dyno session today. Here are the results from last weeks session and this weeks along with the changes:
Car specs: 2001 Mustang Bullitt - 2300miles on odometer
Fluids: Mobil 1 5W30 oil and Mobil 93 octane fuel
Last week mods: JBA Shorty headers, Magnaflow X-pipe w/cats, Magnaflow cat-back, 100mm Densecharger, Steeda Underdrive Pullies, FRPP aluminum driveshaft, Steeda Triax
1. Last weeks numbers (SAE CF=0.98):
- Run1 (20min cooldown): 246.1rwhp & 279.0rwtq
- Run2 (2min cooldown): 247.3rwhp & 280.8rwtq
- Run3 (40sec cooldown): 248.4rwhp & 280.8rwtq *best #'s*
(A/F ratio: 12.5:1 from 2500-4000rpm drops to 11.6:1 @ 5800)
This weeks mods (intention was to lean out A/F ratio and increase timing): Remove 100mm Densecharger, Add Steeda Timing Adjuster, Add C&L80mm MAF sensor body
2. This weeks numbers (SAE CF=0.98):
- Run1 (TA=13deg, hot): 245.4rwhp & 280.4rwtq (RESET ECU)
- Run2 (TA=10deg, 24min cooldown): 244.9rwhp & 278.7rwtq
- Run3 (TA=12deg, 45min cooldown): 248.5rwhp & 285.9rwtq
- Run4 (TA=14deg, 6min cooldown): 250.6rwhp & 288.4rwtq
(A/F ratio: 13:1 from 2500-4000rpm drops to 12:1 * 6000rpm)
Well, that's it. If you compare my best run of last week with run 2 of this week (both with base timing), then you will see that by removing the 100mm Densecharger and installing the C&L80mm MAF body, I *lost* 3.5rwhp & *lost* 2.1 lb-ft of rwtq. Gee, and it only cost me $269. WTF!? One interesting thing to note is that my A/F ratio did get a little leaner with the C&L80mm MAF kit so my theory of correcting the A/F ratio was correct but the overall results are confusing. Any ideas?
On the positive side, it has been shown time and time again that the Steeda T/A is a good mod. By adding in 4 more degrees of timing advance, I *gained* 5.7rwhp & *gained* 9.6 lb-ft of rwtq.
To be fair, this second dyno session was at a different location so there could be dyno-to-dyno variation. I still think that something is fishy here but I'm at a loss now AND I'm just freakin' disappointed. The HP numbers are OK but the torque numbers I expected to see higher considering I've seen other GT's and Bullitts dynoing 280rwtq with little to NO mods.
Any and ALL input is much appreciated. Thanks guys and gals!
Mark
Car specs: 2001 Mustang Bullitt - 2300miles on odometer
Fluids: Mobil 1 5W30 oil and Mobil 93 octane fuel
Last week mods: JBA Shorty headers, Magnaflow X-pipe w/cats, Magnaflow cat-back, 100mm Densecharger, Steeda Underdrive Pullies, FRPP aluminum driveshaft, Steeda Triax
1. Last weeks numbers (SAE CF=0.98):
- Run1 (20min cooldown): 246.1rwhp & 279.0rwtq
- Run2 (2min cooldown): 247.3rwhp & 280.8rwtq
- Run3 (40sec cooldown): 248.4rwhp & 280.8rwtq *best #'s*
(A/F ratio: 12.5:1 from 2500-4000rpm drops to 11.6:1 @ 5800)
This weeks mods (intention was to lean out A/F ratio and increase timing): Remove 100mm Densecharger, Add Steeda Timing Adjuster, Add C&L80mm MAF sensor body
2. This weeks numbers (SAE CF=0.98):
- Run1 (TA=13deg, hot): 245.4rwhp & 280.4rwtq (RESET ECU)
- Run2 (TA=10deg, 24min cooldown): 244.9rwhp & 278.7rwtq
- Run3 (TA=12deg, 45min cooldown): 248.5rwhp & 285.9rwtq
- Run4 (TA=14deg, 6min cooldown): 250.6rwhp & 288.4rwtq
(A/F ratio: 13:1 from 2500-4000rpm drops to 12:1 * 6000rpm)
Well, that's it. If you compare my best run of last week with run 2 of this week (both with base timing), then you will see that by removing the 100mm Densecharger and installing the C&L80mm MAF body, I *lost* 3.5rwhp & *lost* 2.1 lb-ft of rwtq. Gee, and it only cost me $269. WTF!? One interesting thing to note is that my A/F ratio did get a little leaner with the C&L80mm MAF kit so my theory of correcting the A/F ratio was correct but the overall results are confusing. Any ideas?
On the positive side, it has been shown time and time again that the Steeda T/A is a good mod. By adding in 4 more degrees of timing advance, I *gained* 5.7rwhp & *gained* 9.6 lb-ft of rwtq.
To be fair, this second dyno session was at a different location so there could be dyno-to-dyno variation. I still think that something is fishy here but I'm at a loss now AND I'm just freakin' disappointed. The HP numbers are OK but the torque numbers I expected to see higher considering I've seen other GT's and Bullitts dynoing 280rwtq with little to NO mods.
Any and ALL input is much appreciated. Thanks guys and gals!
Mark