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Seeking a definitive answer...
The time is approaching for my biennial swap of exhaust systems to pass local emissions tests.
The car is an 86 3.2 with SSIs, SW chip, and 2-in 1-out exhaust. My plan is to do several chassis dyno runs and then swap back to the stock exhaust before repeating the dyno runs. I'm planning to keep the SW chip in place unless A/F ratios are way off during the stock exhaust measurements. Maybe I'll swap in the stock chip. Anyone care to comment on the procedure, or offer a prediction of the results? TIA |
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01-30-2018, 06:20 PM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,560
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My 86 on stock exhaust with a SW chip passed CO smog quite easily last month. I’ll see if I can find the results sheet.
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1974 914 Bumble Bee 2009 Outback XT 2008 Cayman S shop test Mule 1996 WRX V-limited 450/1000 |
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01-30-2018, 06:53 PM
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Chain fence eating turbo
Join Date: Dec 2008
Location: Austin, TX
Posts: 9,141
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If you run the SW chip with stock components, you'll probably see a larger gap in power with the SW chip and mods skewing actual stock to mods.
It'd reinforce you did the right things in regards to improvements falsely. |
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01-30-2018, 07:55 PM
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I'm not concerned with passing emissions with the SW chip, it has passed before.
I'm more concerned with making maximum power while dyno testing the stock exhaust. I guess the best thing is to try both chips while I'm testing. |
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01-31-2018, 09:45 AM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,560
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That I couldn't help with. I have only dynoed my car with the chip in place on a stock exhaust. In fact it's how I discovered I had the chip because it was so much higher than expected that I pulled the DME and looked.
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1974 914 Bumble Bee 2009 Outback XT 2008 Cayman S shop test Mule 1996 WRX V-limited 450/1000 |
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01-31-2018, 10:40 AM
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Registered
Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,702
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01-31-2018, 10:56 AM
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