My Supersprint headers & cats have arrived so I am dropping off my M6 to Active on Monday August 28th in the morning. My car sits in stock form less the carbon air filters.
Here is the list of work to be done which should take approx 1 week to complete:
1) Base line Mustang Dyno & Dyno Jet runs
2) Next, Install Supersprint Headers and Hi Flow Cats (leaving stock back end of exhaust in place to minimize the exhaust noise) I realize there will be some loss in power. Nevertheless, I hear that the stock mufflers are a straight through design anyway so Im not expecting a terrible loss in power from the cats back.
3) Active ECU upgrade is next on the list. We will be tuning it to work along with the exhaust work and will be removing the top speed limiter. We will also run a few tests with red line set at 8500, 8600, & 8700 RPM. If power curve is strong we may be setting the red line at 8700.
4) Will finish off with final Mustang Dyno & Dyno Jet runs to audit the gains.
5) Pick up car from Active.
6) Waiting 2-3 more weeks for my Dinan 3.91 differential to arrive which is being installed by a local Dinan dealer/installer called "Foreign Affairs".
We are guessing the car may come in around 540-550 hp with all the mods including the diff upgrade with torque coming in at around 425 ft lbs.
Even though the diff upgrade will not add to the horsepower figures on the dyno, it will have a notable effect on torque and will likely make the car feel like its 300 lbs. lighter letting the revs climb easier. I am confident the Dinan differnetial will make for the "perception" of improved power across the entire RPM band in every gear at any speed. Therefore, I feel that the car will pull like it is packing 570hp.
Once the Diff install is complete, I will run the car back to Active for another dyno pass to see what affect the diff had on torque numbers.
Stay tuned to this thread for updates as install progresses at Active!