So another update, I've put about 450 miles on the turbo setup and no major problems so far. I adjusted my tune some more and found out why my AFR was going rich in the upper RPMs. Apparently my injector duty cycle was hitting 100% and when it does that the Greddy EMU can't control the injectors and it just dumps fuel into the engine causing the rich condition.
To solve this problem I found another thread on here from a while back and they said to make the MAF clamp progressive. I tried this so I set the MAF clamp from 4.2~4.3 volts and it solved the problem. However since I subtracted so much fuel when I thought it was running rich, now I was running lean so I had to add fuel back in. I already fixed my fuel map and everything is running well.
Another problem I had was that at idle sometimes the rpms dropped really low to about 500 rpm and felt like it was about to stall. I was reading up about other turbo IS300s with idle problems and alot of people mentioned the air assist tube. The stock injectors are air assist, but majority of aftermarket injectors aren't. Since I installed the injectors SRT provided I assumed they don't need the air assist so I deleted it.
I plugged up both sides where the air assist tube use to be with some vacuum fittings, and tried driving my car with out it. The idle is so much better now, the RPMs still drops down to around 500 but it no longer feels like its going to stall.
Another thing I had to fix recently was my wheel. I accidentally curbed my Rpf1s on a curb yesterday and it really bothered me. This is the first time I have ever curbed my wheels in all my years of driving so I was pretty pissed at myself
I tried fixing it by sanding it down with sandpaper in the following order, 160>400>600>1000>2000>2500 and then I hit it with Mother's mag and aluminum polish. The damaged area looks like chrome now, but its alot brighter than the rest of the wheel. I need to come up with a way to tint it so it can match the SBC finish. Also it was hard to sand off the damage and blend it with the SBC finish. Under the SBC finish it's black and I had to sand off that layer to get to the aluminum. It was hard to sand off the edges without damaging the undamaged SBC so I stopped short of the edge which is why it's black.
I had these wheels for 3 years now, so I think it might be time to switch it up. I was considering some Work CR Kai Kiwamis in the WMB finish but it seems that alot of IS300 owners already have that wheel. I was also considering some SSR SP3s in the SBC finish, but they're 3 piece wheels so they're alot heavier than one piece wheels. I'm really picky when it comes to wheels, they have to be shiny, concave, lightweight and affordable. The RPF1s fit that criteria perfectly so I'm still on the fence about getting new wheels
If it comes down to it, I might just order another set in the exact same specs as the ones I have now and sell my current set. My current set has a few rockchips and minor damage from when discount tire mounted my tires anyways. It would be a perfect chance to get wider tires too since I'm boosted now.