Unitronic 2.7T stage3/GTfile emmision test results.

[BastardS4]

Relevent mods:

NGK BKRE8E-IX, gapped to .026
Siemens 630CC injectors at 4bar
85mm VAG/Unitronic MAF housing
X1 intake
GHL downpipes, HF cats.
Unitronic ECU


Test 1, 2 stage idle test

conditions.

oil temps 75 degrees, when i parked it, cooled down to 60 by the time it was my turn. basically sat outside for 20 minutes. It was about 6 degrees outside.

idle was +100 and +20 idle torque offset

2500 rpm
HC ppm: 431, limit:150 FAIL
CO% 1.52, limit: 0.7 FAIL

idle: 898 RPM

HC PPM: 192, limit: 150 FAIL
CO% 0.72, limit: 0.70 FAIL



Dang!

I drop the idle and torque offset to 50rpm and +5, get the car nice and hot and try again.

oil temps at 100C


2500 RPM

HC PPM: 92 limit 150 PASS
CO%: 0.30 limit 0.7 PASS

Idle: 842

HC ppm: 20 limit 150 PASS
CO%: 0.04 limit 0.7 PASS



Holy shit. What a difference it made just getting the car up to temp. Those are pretty outstanding results considering the level of modification, high flow cats with a few years on em etc.

[Rated S]

My car breathes white c02 smog of fury when she's cold. I mean like spits that crap out like it's no buddies business, but when she's all warmed up, she passes perfectly.

[Don Supreme]

Good info.

[JMTx86]

.026 gap? that a lil wide no?

[RolledMySTi]

Keeping the car and most importantly the cats up to temp is very important. The drop you had in oil temp is huge for passing smog. I had to pass smog here in Cali earlier in the year and my car failed after only sitting for 15 minutes in the summer heat. To pass I had to drive around for 10 minutes and literally drive right in to the dock and get tested right away to barely pass smog.

[Reich]

Remember's me when my EGTs were shot. Too much correction at cold and under boost. Still need to change them we only eliminate them for now but it's way better.