Alright guys, I've been a member here for awhile now, and I've just recently boosted my 1uz. There have been a few things I've noticed that I wanted to point out to everyone that I couldn't find through searching and lurking.
A little about my car, 88 Supra, original turbo, now 1uz powered (from a SC400) w58, with the headers flipped around to a y-pipe to a holset turbo. External wastegate, 3" exhaust with no cats.
Originally the car was a 7mgte that had a BHG, I bought it and put a 2jz-geT and enjoyed it until the car cranked walked to death, but it still had no torque with only a small t04 on it.
Upset and determined I went 2jzgtte, figured the stock turbos would provide enough low end fun. It did, until number 2 turbo died it's death for being ceramic. Then I went USDM twins in true twin mode, and then it lost all it's fun.
At the time I had my SC400 which was stock (minus no cats, SAFC, and coil overs) and had a lot of fun with it, tooled around with it, and ran a little bit of NOS (since Jibby was doing it safely) and then sold the car in favor of a S2000. The Supra sat with dreams of running a 1uz with a five speed behind it, but things were getting a bit hard, and quantum auto wasn't around yet, and since I couldn't do any fab work, I could make mounts.
So I'm sure you guys know, Quantum came around, and a few other people making one off parts (like SuperRunner and his flywheels) and then going 1uz with a five speed became easy.
So fast forward, got the 1uz up and running, and I had a bunch of left over parts and a friend at a muffler shop. So I said "To Hell with it, I'm going turbo, I've gone this far to stop". And here I am today. Learning things the hard way, and wanting to pass it all down to you guys.
So far I've been running a Holset HX35 on 7 psi. I'm still on stock injectors and FPR, the only thing I've done is a Walboro fuel pump. The AFR's are still way way rich. Like 10:1 rich.
However, I think this is due to the fact I do not have o2 sensors. I don't have any plumbed in the exhaust (minus the wideband) at all so I have check engine lights. I've also noticed that the adjustments I have made with my SAFC have NOT been relearned. So I think I've combated the factory ecu's relearn function.
To test whether the ecu is relearning or not, I've leaned out the car to about 16:1 at low throttle at 3500 rpms'. I've logged about 300 miles without any relearn yet. So far so good! On my stock SC400 ANY changes I made with the SAFC would be relearned in a matter of days, would take about a 100 miles or so.
In my meager 300 miles of driving I blew out my cam seals because of crank case pressure. On the left bank (driver side), I replaced the PCV with one from a Supra TT, and a catch can. However I didn't realize the right bank (passenger side) with the hose going into the throttle body (even though Lex and XR mentioned it) was still connected.
What I plan to do is vent that to atmosphere for now and see what will happen.
So far so good. I've got the KMV/AFM sensor blow through in the stock location with aluminum piping. I know I have a leak through the little filter adapter, but no big deal. I had to come up with a way to do an oil return since I couldn't find a way to gravity feed it so I used a pump to do it.
But that's about it, once I find some more issues I'll definitely post back up.
A little about my car, 88 Supra, original turbo, now 1uz powered (from a SC400) w58, with the headers flipped around to a y-pipe to a holset turbo. External wastegate, 3" exhaust with no cats.
Originally the car was a 7mgte that had a BHG, I bought it and put a 2jz-geT and enjoyed it until the car cranked walked to death, but it still had no torque with only a small t04 on it.
Upset and determined I went 2jzgtte, figured the stock turbos would provide enough low end fun. It did, until number 2 turbo died it's death for being ceramic. Then I went USDM twins in true twin mode, and then it lost all it's fun.
At the time I had my SC400 which was stock (minus no cats, SAFC, and coil overs) and had a lot of fun with it, tooled around with it, and ran a little bit of NOS (since Jibby was doing it safely) and then sold the car in favor of a S2000. The Supra sat with dreams of running a 1uz with a five speed behind it, but things were getting a bit hard, and quantum auto wasn't around yet, and since I couldn't do any fab work, I could make mounts.
So I'm sure you guys know, Quantum came around, and a few other people making one off parts (like SuperRunner and his flywheels) and then going 1uz with a five speed became easy.
So fast forward, got the 1uz up and running, and I had a bunch of left over parts and a friend at a muffler shop. So I said "To Hell with it, I'm going turbo, I've gone this far to stop". And here I am today. Learning things the hard way, and wanting to pass it all down to you guys.
So far I've been running a Holset HX35 on 7 psi. I'm still on stock injectors and FPR, the only thing I've done is a Walboro fuel pump. The AFR's are still way way rich. Like 10:1 rich.
However, I think this is due to the fact I do not have o2 sensors. I don't have any plumbed in the exhaust (minus the wideband) at all so I have check engine lights. I've also noticed that the adjustments I have made with my SAFC have NOT been relearned. So I think I've combated the factory ecu's relearn function.
To test whether the ecu is relearning or not, I've leaned out the car to about 16:1 at low throttle at 3500 rpms'. I've logged about 300 miles without any relearn yet. So far so good! On my stock SC400 ANY changes I made with the SAFC would be relearned in a matter of days, would take about a 100 miles or so.
In my meager 300 miles of driving I blew out my cam seals because of crank case pressure. On the left bank (driver side), I replaced the PCV with one from a Supra TT, and a catch can. However I didn't realize the right bank (passenger side) with the hose going into the throttle body (even though Lex and XR mentioned it) was still connected.
What I plan to do is vent that to atmosphere for now and see what will happen.
So far so good. I've got the KMV/AFM sensor blow through in the stock location with aluminum piping. I know I have a leak through the little filter adapter, but no big deal. I had to come up with a way to do an oil return since I couldn't find a way to gravity feed it so I used a pump to do it.
But that's about it, once I find some more issues I'll definitely post back up.