Okay, I've got 2 Mk3 Supras. One is going to be built with whatever I have that's suitable, the other, I'd like to do as well as I can budget for.
I have 1 exhaust that I'm pretty sure that I don't want to keep. Stock elbow, some sort of downpipe that I haven't measured for size, though it's not stock, and what I'm pretty sure is a 2.5" cat-back.
The other is a LIPP elbow, RT downpipe and Tanabe Hyper Medallion catback. I'm sure that I want to keep the catback, as I love how quiet it is, and is a good 3" all the way through.
Somewhere in there, I need to add a spot for a wideband. Maybe.
Original plan: Install the Zeitronix unit that I bought, and use it's simulated narrowband to talk to the TCCS. This has the advantage that I can trick closed loop operation to run a tad lean for better fuel economy, which I may try, since I also have an EGT, but it's not really my plan do do so.
Concerns: This is still what I'd rather do, but I'm not sure if the TCCS will throw codes if the stock O2 sensor isn't connected. I could connect a ceramic resistor across the heating terminals so that the TCCS thinks that there's something there if need be. Is this a reasonable use of the simulated narrowband?
Alternate #1. Add a wideband bung to the LIPP elbow. This at least uses the parts that I have, with a minimum of additional parts to purchase. The advantage here being less mucking about with the TCCS, just use the wideband to log/display AFRs.
Concerns: I believe that the LIPP elbow is a cast piece. I don't know if drilling/tapping is adequate, and a weld is a potential weak spot.
Alternate #2. Ebay elbow. (Or if anyone knows a good one that has both bungs.) I've seen ones that have both a wideband bung and a stock O2 sensor bung. Relatively cheap, but ... cheap is as cheap does. (Concerns are obvious.)
Alternate #3. Whole new downpipe with integrated elbow, possibly divorced. It's not like I'm going to toss the RT downpipe, as I've got another car to put it in, and it's a known good piece. Not sure what divorced downpipes would work with my turbo, but probably won't be too hard to find one. Concern here is that I'd rather not waste money, and for a divorced downpipe... I'm not looking for loud. (Remember, I like my nice quiet exhaust.)
So, which plan? Why go that way?
I have 1 exhaust that I'm pretty sure that I don't want to keep. Stock elbow, some sort of downpipe that I haven't measured for size, though it's not stock, and what I'm pretty sure is a 2.5" cat-back.
The other is a LIPP elbow, RT downpipe and Tanabe Hyper Medallion catback. I'm sure that I want to keep the catback, as I love how quiet it is, and is a good 3" all the way through.
Somewhere in there, I need to add a spot for a wideband. Maybe.
Original plan: Install the Zeitronix unit that I bought, and use it's simulated narrowband to talk to the TCCS. This has the advantage that I can trick closed loop operation to run a tad lean for better fuel economy, which I may try, since I also have an EGT, but it's not really my plan do do so.
Concerns: This is still what I'd rather do, but I'm not sure if the TCCS will throw codes if the stock O2 sensor isn't connected. I could connect a ceramic resistor across the heating terminals so that the TCCS thinks that there's something there if need be. Is this a reasonable use of the simulated narrowband?
Alternate #1. Add a wideband bung to the LIPP elbow. This at least uses the parts that I have, with a minimum of additional parts to purchase. The advantage here being less mucking about with the TCCS, just use the wideband to log/display AFRs.
Concerns: I believe that the LIPP elbow is a cast piece. I don't know if drilling/tapping is adequate, and a weld is a potential weak spot.
Alternate #2. Ebay elbow. (Or if anyone knows a good one that has both bungs.) I've seen ones that have both a wideband bung and a stock O2 sensor bung. Relatively cheap, but ... cheap is as cheap does. (Concerns are obvious.)
Alternate #3. Whole new downpipe with integrated elbow, possibly divorced. It's not like I'm going to toss the RT downpipe, as I've got another car to put it in, and it's a known good piece. Not sure what divorced downpipes would work with my turbo, but probably won't be too hard to find one. Concern here is that I'd rather not waste money, and for a divorced downpipe... I'm not looking for loud. (Remember, I like my nice quiet exhaust.)
So, which plan? Why go that way?
