Cool Tech: Kooks vs Stock Dyno Results!!
#161
We use 91,or 93 when I have access. Usually mix in some 100 when tracking just for extra margin in the heat. Unless you are really wringing it out on a really hot day, 91 will be fine. On a hot DD day using 91, just switch to the black key if you are concerned and drive a little more conservatively.
#163
#164
You have 4 choices on the Boss regarding Long Tube Headers (any manufacturer);
1. Don't do the Long Tube Headers
2. Do the headers, keep OEM Track Key, and live with the light (our 2012 LS)
3. Do the headers and install a custom tune which also turns off the rear O2's
4. Do the headers and have a shop simese two cats per side together. Expensive (4 cats) but this works (our 2013 LS is running this set-up)
1. Don't do the Long Tube Headers
2. Do the headers, keep OEM Track Key, and live with the light (our 2012 LS)
3. Do the headers and install a custom tune which also turns off the rear O2's
4. Do the headers and have a shop simese two cats per side together. Expensive (4 cats) but this works (our 2013 LS is running this set-up)
#166
The youtube clip that cloud9 posted over at BMO sounds wicked! If I had the money I would get these w/no cats in a heart beat, CEL be damned. Would be great to see more Dyno results of just the upgraded exhaust w/o a tune with or without a CAI so we have an idea of what 'consistent' gains you can get just by replacing the stock headers and H pipe w/Kooks setup.
IIRC we are talking 25-30hp w/o a tune and 30+ with a tune and CAI?
IIRC we are talking 25-30hp w/o a tune and 30+ with a tune and CAI?
#167
Cobra Member
Joined: April 14, 2011
Posts: 1,072
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From: NJ. Waiting for our Gov. to be held accountable for his actions>>>Jersey Broke
I believe most of your gains are with the removal of the cats and mid pipe and a tune if I remember correctly. Headers dont play a huge part in the HP gains. i read that the factory headers do a pretty good job with flow. I guess it all depends on what your plans are in building your roadrunner 5.0.
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