FC Zach's '87 Sport

[FerociousP]

Originally Posted by FC Zach

No cat, just presilencer (I passed visual inspection like this). I planned to have it tuned till barely running, maybe adding some alcohol as well but worse case I haven't ruled out the idea of running a pump, I just want to see if I can do without one first so I don't have to install/remove a kit yearly.

On my '87 Sport, i passed TN emissions on stock ecu with no cat by turning the CAS as far as i could retarded and putting in a bunch of ISO heet (think 8ish bottles) into the gas tank. That idea has been around for a while, and honestly i'm surprised it worked. The car came into the bay doing the TPS idle bounce (prob bc ecu was freaking out)... honestly i think i got lucky, guy may have even pulled one of the probes (dual exh) out early to help.

On my vert, I had a stock air pump running with the outlet hose going to a o2 sensor location directly in front of a working aftermarket cat.

If I had to do it all over again, i'd spend the extra money putting a real cat on there temporarily as its almost a "sure thing". You seem to be ok with multiple attempts so you can mess with tuning and such, but it will be a long road IMO. Especially with being ported. My guess is you will need some sort of air injection, and hopefully can still bolt up a NA air pump easily if you still have one.