Progress update and a few questions

[ike84]

In terms of the hvac and defrost I would pull all of it. If you remove all the engine bay insulation your cockpit will be warm enough that I don't think you will have an issue.

The sai delete can be done two ways, either remove pump and block of the tubing, or to remove all the associated tubing. The latter will require block off plates, either homemade or they can be purchased from pelican.

Evap delete requires managing the vent lines from the tank and fill neck, either to atmosphere at the wheel well or back into the purge valve housing. Whether you also pull the purge valve will help you make that decision.

Our cars have two separate operating conditions, open loop and closed loop. Closed loop requires afr readings from the precat sensors. Open loop relies solely on maf readings. Open loop only happens at high load and wot, so you need the precat sensors installed. Every aftermarket header I've seen for our cars has at least one set of sensor bungs in place though so it's not an issue. The postcat sensors are for emissions monitoring. A lot of guys will just not mount the sensor and ziptie it out of the way, thereby monitoring atmospheric conditions and tricking the system into thinking the cats are working. You can also buy sensor spacers with mini cats built into the spacer that will fool the sensor. On the other hand, If you flash to a row tune those sensors can be completely removed without a CEL coming on. If you get aftermarket headers I would get the double-bung models so that you can mount an EGT sensor and wideband O2 sensor for tuning purposes (if you're into that sort of thing)

Please remember that the stuff I'm talking about here are major emissions violations and your car will no longer be road legal and there's no chance of passing inspection if your state utilizes obd2 or sniff testing.

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