New Z owner, mystery knob

[duder280z]

Please more pics of the engine.

 

Using the low temp circuit to richen mixture isn't a good idea imo, because it's not increasing the max output of your injectors. Adjusting fuel pressure is much better for minor tweaking needing more fuel, but that's a bit hard to adjust from the cockpit

 

You're only getting 4PSI? Should be getting closer to 5-7, not over 7 though.

 

I'm curious what turbo to intake pipe that is. It isn't stock that's for sure.

 

I agree with you on the temp circuit. It has an adjustable regulator and is running around 50psi currently. I will eventually get a boost sensitive regulator, but this works for now. I'll get more pics when the weather clears up some, it's been raining for a few days(Seattle, go figure). As for the boost pressure, it's a conversion of the stock motor done in the 80's running the stock ecu. I'm not sure it was intended for more than 4psi when it was built. I've been thinking about cranking it up a notch and seeing what happens, but I'm a little nervous without a A/F ratio meter to tell me if I go lean. I have a narrow band A/F guage, but this car doesn't have an O2 sensor, so I have to mod the exhaust just to do that(not sure it's worth it). The J pipe is an old school unit by BAE, I have no idea what that stands for but it looks cool. It would buff out to a sweet shine without much effort. It has a pop off valve that also works like a bov that is adjustable, so it should be pretty easy to turn it up if I want to get froggy. A guy had one for sale on ebay a few days ago, it didn't sell, he may relist it. I've got a short shifter(the stock one is super sloppy right now) and all new boots and hardware coming along with a basic cool air intake to get rid of that tiny stock airbox, should be good for some added driving enjoyment.

[Gollum]

Ahhh, ok so it's running the stock ECU? Get pics of the ECU and the plugs going into it if you can. I'll be able to tell you if it's a turbo or NA ECU.

 

The factory nissan turbo engines debuted in 81', so it's not out of the quetion the swap was done with a factory turbo engine. Obviously anything is possible though.

 

The shifter - usually in my experience sloppy shifting is from cracked or missing bushings that go inside the shifter. If you take it apart you should see what I mean. Shifter has a single pin that goes through it and the pin rests up against two bushings that keep the shifter semi-insulated from the transmission and keep the shifter from having too much twistability and free play.