Mike Collins 2010 Camaro SS
This update from: 07/24/2009

Mike's new Camaro SS is the right color as orange is my favorite color!



The first thing we did was to stick Mike's SS on the dyno to see how much power it made stock. It made 332 rwhp and 323 ft lbs of torque. Mike's SS is a 6 speed automatic, rated at 400 hp at the engine. Column 2 are the numbers in stock configuration. Notice that the air/fuel ratio was extremely rich!  Back in '05 we tested a brand new C6 with an LS2, and it made 323 rwhp. Here is a link to that Corvette. http://www.exoticperformanceplus.com/projectCar.php?car=30

We then dyno tuned Mike's SS using our EFILive software, and we picked up quite a bit of power. 21 rwhp and 40 ft lbs or torque, wow! Column 1 is where you will find the tuned numbers on the above graph.






The factory exhaust is probably going to be the number one item that people are going to replace on the new Camaro SS, as it is just too quiet.



Mike ordered a new GM Performance Cat Back System for his Camaro, which is made for GM by Borla. Mufflers and larger 5 inch tips is what it mainly consist of.





We broke out the sawzall and started right in! I remember doing this to my brand new Camaro Z28 back in '82 in the driveway, it's easier these days on a lift!



Besides being ugly, the factory mufflers were each 13 pounds heavier!



The new exhaust looks and sounds better!



The exhaust tips on the new system fill up the holes in the rear valance, and look much better. That is Mike, the owner of this SS, polishing up the stainless on the new exhaust system.  



Back on the dyno, we lost several with the new exhaust! More than likely the tune went a little rich again. Mike wanted the exhaust a little louder than what the new mufflers gave it, so the resonators are being removed and stainless steel tubing is being added in their place. Next we'll retune this SS to find the added power that we should be seeing.






Update:
  Removing the resonators gave the exhaust system a much better sound. We put the SS back on the dyno and retuned it, but we did not get back to the power we made prior to replacing the exhaust system, even though the car sounds much better now. We ran out of time, but we want to run the car with the air box lid removed to see if the air intake cfm is not enough to allow for additional power. Mike has a new GM Performance air intake on order, so we'll be trying it out very soon.
  We did find that at the top of 1st gear, the GM tune allowed the engine to hit the rev limiter, which momentarily shut the throttle blade. Mike had mentioned that the car felt like it did something strange at the top of first gear. Once we lowered the shift point in 1st gear, we saw that it also did this at the top of 2nd gear. Once we lowered the 2nd gear shift point we felt a big improvement in the cars performance.



This was the initial 1/4 mile run with the added power from our tune, but prior to adjusting the shift points.



Check out just how much time we took off the 1/4 mile time with the shift point adjustments! Wow! The mph picked up a little too.

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