I need help from the gurus here. My car is a 93 GS300 with Aristo automatic 2jzgte. About 5000 miles on a fresh rebuild.. bearings, rings, seals.. everything new. USDM 6 speed cams, stock JDM fuel injectors, 255 walbro. Twin K26 turbos, never been boosted past 16psi (no BCC yet). My car has a smoking problem, and the patch won't cure this one.
When I built the turbo system, my front turbo was already starting to go.. smoked on my last motor.. an sr20det. I built the turbo system with it anyway and endured the smoke.. knowing where it came from. It only recently starting to lag a bit more boosting and I scored another new rebuilt K26 for a great price and installed it 2 days ago. The car is still smoking..almost as bad as before. I thought it was maybe the turbos getting too much oil.. -3AN feed into each, with -12AN return (teed into one into the oil pan factory fitting) I made inline restrictors and put into the feed lines.. now they are maybe -1AN size on the inlet to the turbo fitting. Still smokes.
There is a lot of fuel smell to the smoke as well, but it is grayish blue. not black. So, I looked at the fuel system. Sard FPR, running 35psi rail pressure. Okay there, but then I thought of something. I have the stock fpr still on the rail, the return line off that goes to the Sard fpr input and my gauge is on the body of the Sard. I was wondering if maybe I was getting the stock pressure at the rail, in addition to the 35psi that the guage on the Sard is reading. the car is also hard to start in the morning or when the engine is cold. I have to press the gas pedal to the floor to get it to catch, and then the idle is lumpy for a good few minutes until the car warms up. Earlier today I eliminated the Sard fpr from the equasion and I'm running just the stock fpr now. Havent had the car cold enough to see if this helps the start at all yet. Still smoking though.
I have a greddy catch can on the valvecover breather, and one going to the intake, both -10AN. Not an excessive amount of blowby oil at all.
My EGT guage is mounted just after the exhaust housing on my back turbo right now.....maybe 2" from the outlet. Cruising around town I'm seeing MAYBE 500*F. At idle the gauge is bottomed out.. lowest it reads is just south of 400*F. This is also when I'm seeing a lot of smoke at stoplights. Idle is somewhat smooth at around 600rpm or less. It may sound like it has a miss, but it's hard to tell because I might have some sound cancellation on my custom made dual exhaust. The highest EGT I have seen is still less than 800*F.
That is all I can think of at the moment to give you clues. I'm open to any and all suggestions.. personal experiences..help of any kind. I'm desperate to get his smoking issue done and over with b/c i got a ticket a few weeks ago for it. I have til the 26th of june to resolve it to have the car looked at, other wise I'll have to pay the 148.00 ticket.
Sorry this is so long.. any ideas? I'll try anything.
When I built the turbo system, my front turbo was already starting to go.. smoked on my last motor.. an sr20det. I built the turbo system with it anyway and endured the smoke.. knowing where it came from. It only recently starting to lag a bit more boosting and I scored another new rebuilt K26 for a great price and installed it 2 days ago. The car is still smoking..almost as bad as before. I thought it was maybe the turbos getting too much oil.. -3AN feed into each, with -12AN return (teed into one into the oil pan factory fitting) I made inline restrictors and put into the feed lines.. now they are maybe -1AN size on the inlet to the turbo fitting. Still smokes.
There is a lot of fuel smell to the smoke as well, but it is grayish blue. not black. So, I looked at the fuel system. Sard FPR, running 35psi rail pressure. Okay there, but then I thought of something. I have the stock fpr still on the rail, the return line off that goes to the Sard fpr input and my gauge is on the body of the Sard. I was wondering if maybe I was getting the stock pressure at the rail, in addition to the 35psi that the guage on the Sard is reading. the car is also hard to start in the morning or when the engine is cold. I have to press the gas pedal to the floor to get it to catch, and then the idle is lumpy for a good few minutes until the car warms up. Earlier today I eliminated the Sard fpr from the equasion and I'm running just the stock fpr now. Havent had the car cold enough to see if this helps the start at all yet. Still smoking though.
I have a greddy catch can on the valvecover breather, and one going to the intake, both -10AN. Not an excessive amount of blowby oil at all.
My EGT guage is mounted just after the exhaust housing on my back turbo right now.....maybe 2" from the outlet. Cruising around town I'm seeing MAYBE 500*F. At idle the gauge is bottomed out.. lowest it reads is just south of 400*F. This is also when I'm seeing a lot of smoke at stoplights. Idle is somewhat smooth at around 600rpm or less. It may sound like it has a miss, but it's hard to tell because I might have some sound cancellation on my custom made dual exhaust. The highest EGT I have seen is still less than 800*F.
That is all I can think of at the moment to give you clues. I'm open to any and all suggestions.. personal experiences..help of any kind. I'm desperate to get his smoking issue done and over with b/c i got a ticket a few weeks ago for it. I have til the 26th of june to resolve it to have the car looked at, other wise I'll have to pay the 148.00 ticket.
Sorry this is so long.. any ideas? I'll try anything.