I've finally decided to crawl out of my cave and surface my build here. I felt like I was taking more from this forum than I was giving. My build used a TON of info that I was able to unearth via this site. My hope is that my build adds to the plethora of information on here and helps others as much as it has helped me.
Anyhow, I've been trying my best with the limited network/connections I have to get suggestions on where I should start with jetting for my turbo surge tank set up. I feel like I hit a dead end. I know that I have to fine tune the jetting for MY set up...so I'm currently in the process of installing a wide band O2 sensor and a boost gauge. However, does anyone here with experience have a ballpark estimate on jet sizes in an application like this? I don't want to start tuning my engine and have it catastrophically fail or damage my newly rebuilt motor because my jets are way out of line.
Here is my set up:
L28 N42 Block
E88 Head (Debating on whether or not to install my spare P79 head in)
280zx Turbo dished pistons .020" oversize
Stock L28 rods
280zxt stock exhaust manifold
Custom 2.5" to 3" turbo back exhaust
T3 Turbo w/internal wastegate:
Trim:55 Inducer Diameter:50.5 mm Exducer Diameter:76 mm A/R:0.5
Trim:73 Inducer Diameter:65.5 mm Exducer Diameter:55.9 mm A/R:0.63
Triple Mikuni 40PHH Carbs
Main Jet: 145
Main Air Jet: 200
Pilot Jet: 60
Pump Nozzle: 0.45
I was able to find one member on here who ran a similar set up with a bone stock N42 block/internals 20+ years ago. He ran a 145 main jet. However, I was not able to find out what size his air correctors were.
Any suggestions on baseline jet settings for a set up like this? Or am I just on my own with my O2 sensor analysis?
I have included pictures for you! Please excuse the mess, it's still under construction.
Thanks in advance!