Post-cat oxygen sensor access with Larini Sport Exhaust - LotusTalk - The Lotus Cars Community
 
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post #1 of 5 (permalink) Old 08-15-2019, 02:16 PM Thread Starter
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Post-cat oxygen sensor access with Larini Sport Exhaust

Hi, gents. I need to slip one of Big Daddy's mini cats or elbows onto my lambda sensor. I believe access to the sensor is via the rear driver side wheel well. Is this still the case with the Larini Sport Exhaust? Time is short for me right now, so I thought I'd ask and avoid any potential surprises.

Thank you,
Josh
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post #2 of 5 (permalink) Old 08-15-2019, 02:38 PM
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Yes, with the right tools it can be done on the ground. Thats how I did mine.
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post #3 of 5 (permalink) Old 08-20-2019, 06:07 AM Thread Starter
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Thank you for confirming, Bofusric. Ordered the part this morning and looking forward to installing.

Thank you,
Josh
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post #4 of 5 (permalink) Old 08-20-2019, 08:57 AM
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I have been running a Big Daddy mini-cat for several years (6-7yrs I think) on my Larini CS with their decat pipe. It's been flawless and no MIL. Install is as said above and I did it on the ground with diffuser removed. You can unplug the o2 extension to make things easier so you aren't twisting the wires as you screw the mini-cat in. If memory serves me right, its just past the plastic retainer clip on the inner rear edge of the clam that supports the o2 wiring.

2005 Elise- Katana II Supercharged and other fun bits
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post #5 of 5 (permalink) Old 08-24-2019, 02:54 PM
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Hi Josh-

What year is your lotus? The 05 has a very different emissions check system than the 06+. If you're 05, you're OK. Otherwise, it's going to be a snark to get it to work without reprogramming.

Mine is an 06'. I tried spacers, the big daddy, even tried a simulator. The 06+ checks for a dip in the emissions after throttle lift. What a pain. I was planning to build a custom simulator to match the required output. But I finally just sent the ECU out. Problem solved (and I have more torque now).

2006 Yellow Elise, BOE Torque 250, Katana II
2000 Porsche Boxster
2017 Volvo XC60
2010 Volvo XC70
2009 Chevy Express 3500 box.
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