Build Euro 1HD-FT Turbo Diesel/H151F 5 Speed Manual LHD 96' USA Swap

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Fun stuff today
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Finally received the turbo "CHRA" from Turbo Power in Cameron Park, CA. It was rebuilt by the owner Cliff using Mellett (made in New Zealand) components. Everything else was either blasted, coated with high temp paint and baked or will be new OEM Toyota.

Assembled
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I located the EGT probe in the correct "pre turbo" location. This probe is for an AutoMeter gauge. I'm currently waiting on an adjustable wastegate actuator with a 1 bar (14.7 psi) spring to arrive before I install this. Hoping that just a bit more boost (at least a safe level for a CT26) will help with acceleration/black smoke in 4th/5th gear.
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And the gauge pod is in. I believe AutoMeter has changed their mold somewhat because it was a PITA to get the pod to fit in the pillar and the pod required extensive cutting.
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This showed up...adjustable wastegate actuator. Installed the whole works, possibly cracking or bruising a rib in the process while trying to wrestle it in. Huge chore. Drove it just now and the most boost I'm seeing is about 9psi. I'm thinking I got the wrong spring? Turbo seems to spool quickly, it just tops out there. Old CT26 hit 12psi easily. Any ideas??

I'm putting alcohol on my extremely sore rib now...
 
Well, that is how the factory wastegate was hooked up. Literally almost identical but I do see your point. I'm not sure where else the actuator would take boost from though
 
And the picture may be a bit confusing...the hose on the right side of the picture is connected to the stock port on the CT26 intake side, the other is on the actuator itself. You can see the Toyota port in some of the above pics
 
So this morning I wanted to verify that I was indeed only getting about 8.5-9psi of boost. I hooked up my dump trailer, drove to down and picked up only a 1/2 yard of topsoil. I figured the combined load was about 3,500lbs and yes, the boost topped out at 9psi and the truck was a total slug :mad: Not only that but the EGT's were 1150 in 4th/5th gear under load. Pretty damn hot

Came home and decided to verify that the wastegate actually had the correct spring installed. Found out that it is nearly impossible to remove the 6 stainless bolts that hold the unit together while it's all installed in the truck. There is literally ZERO room. After about an hour + though, I had it apart only to find that the spring was correct.

When I installed the wastegate, I hooked it up with very little pre-load so I wondered if that was the problem. I decided to shim it about 2mm to test this theory. 2mm netted me a boost increase to about 11psi. At least I was headed in the right direction. I then removed the shims and ended up adjusting the rod a total a 2x and test driving it after each adjustment. Now, the truck is making a solid 13psi without any shims. Power is MUCH better and the highest EGT was 1000 degrees while going up a hill in 4th/5th gear under load. My goal is 15psi, at least I'm on the right track now. It's a bit frustrating that the wastegate actuator has required this much adjustment though.
 
At the end of the day yesterday, I wondered the exact same thing
 
Wastegates need a ton of preload to operate properly, or else there's not enough pressure on the spring to keep the wastegate closed prior to hitting your set pressure.
 
GLTHFJ60 said:
Wastegates need a ton of preload to operate properly, or else there's not enough pressure on the spring to keep the wastegate closed prior to hitting your set pressure.
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That is exactly what I found out. The 15psi spring is probably wide open at 15psi however it's bleeding off so much boost prior to that the turbo is unable to spool up and build enough pressure. I have a 20psi spring on order which I think will get me much closer. If that doesn't work, I'll install a manual boost controller and admit "lesson learned".
 
Well, I've learned my lesson with the dumb adjustable wastegate. DON'T waste your money! The 20psi spring was only a bit shorter and the rate felt about the same, it made absolutely no difference in the boost that was actually being created. I think it topped out at 9psi or so.

This is what I should have gone with the first time around, Hallman Pro-RX
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Boost is now adjusted to a steady 15psi and I can easily go down if I want too. With the controller maxed out, the engine created about 17psi of boost, too much for the stock CT26. Very simply install though, lesson learned.
 
Rock40 said:
Boost is now adjusted to a steady 15psi and I can easily go down if I want too. With the controller maxed out, the engine created about 17psi of boost, too much for the stock CT26. Very simply install though, lesson learned.
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I find it very strange that you were only able to achieve 17psi with the boost controller maxed out, takes me back to your abnormally low EGT's and the question about how low your fuel is set currently...

Happy to hear you got your MBC set up and working though!
 
I could only get about 17 with my stock ct26 on my ft also.
I have more than enough fuel with AFR and EGT to prove it.
I figured my turbo is shagged?
Maybe there is something else going on
 
IanB said:
I find it very strange that you were only able to achieve 17psi with the boost controller maxed out, takes me back to your abnormally low EGT's and the question about how low your fuel is set currently...

Happy to hear you got your MBC set up and working though!
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I think you're getting me confused with Steve's FT install. He's running a GTurbo and intercooler. My EGT's aver very normal, 700F or so cruising at highway speed and it will run up to 900-1000F if I really push it uphill

And the Hallman I installed is running the very light spring which is only supposed to provide about 5psi or so over whatever your wastegate is capable of making. It'll do a lot more with the heavy spring installed but I don't need it at this point.
 
diby 2000 said:
I could only get about 17 with my stock ct26 on my ft also.
I have more than enough fuel with AFR and EGT to prove it.
I figured my turbo is shagged?
Maybe there is something else going on
Click to expand...
At 17psi the CT26 was really starting to scream and mine is brand new rebuilt and balanced. I believe the upper safe limit is 16psi or so.
 
Rock40 said:
I think you're getting me confused with Steve's FT install. He's running a GTurbo and intercooler. My EGT's aver very normal, 700F or so cruising at highway speed and it will run up to 900-1000F if I really push it uphill

And the Hallman I installed is running the very light spring which is only supposed to provide about 5psi or so over whatever your wastegate is capable of making. It'll do a lot more with the heavy spring installed but I don't need it at this point.
Click to expand...

That makes more sense, I did confuse you with Steve, and I didn't realize there were different springs for this style MBC.
 
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