Well I just finished installing my new 3 inch straight shot exhaust, with Dynomax Ultraflow muffler and I also installed a used 3 inch down pipe.
All of this replaced a stock down pipe, which was wheezing thru a shade tree mechanic 2 1/4 straight pipe where the cat used to be, and thru a pair of (no kidding) 2 inch pipes
into a pair of Flowmaster 40 series delta flows and on out the rear.
Before I removed the old exhaust I noticed whenever I started my car and until it warmed up, the 02 numbers on the Scanmaster were usually in the upper 700's.
Well today I start my car for the first time with the new exhaust. I didn't check to see what the Scanmaster was reading because the first thing I immediatley did was start checking for exhaust leaks.
However I did notice once warmed up the readings were in the 400's and evnetually in the 500 range.
If I blip the throttle it gets into the 680 range and went to 703 briefly.
Now I would guess since I have opened up the exhaust this would naturally make the car run leaner correct?
But before I take this car out on the road should I bump up the fuel curves any via the turbo tweak chip?
Also before I did all of this I checked my fuel pressure and it was at 43 PSI static, and increases 1 PSI per lb of boost.
Thanks! I'll post a video and pics later.
All of this replaced a stock down pipe, which was wheezing thru a shade tree mechanic 2 1/4 straight pipe where the cat used to be, and thru a pair of (no kidding) 2 inch pipes
into a pair of Flowmaster 40 series delta flows and on out the rear. Before I removed the old exhaust I noticed whenever I started my car and until it warmed up, the 02 numbers on the Scanmaster were usually in the upper 700's.
Well today I start my car for the first time with the new exhaust. I didn't check to see what the Scanmaster was reading because the first thing I immediatley did was start checking for exhaust leaks.
However I did notice once warmed up the readings were in the 400's and evnetually in the 500 range.
If I blip the throttle it gets into the 680 range and went to 703 briefly.
Now I would guess since I have opened up the exhaust this would naturally make the car run leaner correct?
But before I take this car out on the road should I bump up the fuel curves any via the turbo tweak chip?
Also before I did all of this I checked my fuel pressure and it was at 43 PSI static, and increases 1 PSI per lb of boost.
Thanks! I'll post a video and pics later.
