LTL Diesel

Hey guys, I just installed a he351cw (60/60/9) off a 06 CR on my 2nd gen. I rebuilt the turbo with a holset kit before I installed, bored out the wastegate, plugged the solenoid and tapped a boost elbow into the compressor housing for the waste gate. I clocked the turbo and fabbed a bracket to support the waste gate. Went out for a test drive and struggled to make 32 psi with the set screw on the boost elbow tightened up. EGTs could easily get close to 1500f within a few seconds. I checked for boost leaks and the system held air without leaks with the engine at TDC. I pulled our 26' camper the other day and had to drive by the pyro for most of the haul. Was hoping to set the wastegate to 40 psi and run cooler that it currently is. Any ideas to increase the boost and lower EGTs? Any help much appreciated.

SIXSLUG

Bigger, more efficient intercooler, propane injection....1500 is melting point, risky...

oliver foster

Pull the waste gate air tube that the boost elbow is on, off and see if it will make any more PSI that way.
I don't like to see 1500F for anything more that a split second, and even then I would rather not see it at all.

LTL Diesel

Just a quick update on the truck. I found the problem causing the low boost. The wastegate actuator is held by a bracket I fabbed do too clocking the housing to fit the 24v truck. The wastegate needs preload to hold the gate closed from the drive pressure trying to open it. I originally did 3 1/2 turns of preload as recommended. I didn't realize the bracket shifted into place. This caused the wastegate to only have 1 turn of preload which was not enough to hold the gate closed. With the wastegate bored out, it opened just due to the drive pressure causing the truck to run hot and have low boost. I now have 4 1/2 turns of preload with the bracket in place and can hit 40+ psi with cool egt's.

SIXSLUG

Sweet. What got you looking at the wastegate operation? High egt's?

LTL Diesel

Yes low boost and high egts, I changed out the intake manifold gasket due to a small leak found when I pressurized the system looking for boost leaks. The new gasket helped a bit but still wasn’t the main problem. I then pulled the waste gate off and realized the low preload. Problem solved👍

SkyHarborCowboy

Great follow up to the story but I gotta ask how did the bracket cause it to lose preload?

LTL Diesel

The steel used to make the bracket has a slight step up in the location of the wastegate. I had to cut a hole for the wastegate to sit in and the way I had it positioned wasn’t ideal for the amount of pressure pulling on the wastegate rod, I slightly modified the bracket to stiffen it after realizing what happened.

AlpineRAM

Did you check that the wastegate can open fully after your modification?
I've seen the consequences of the wastegate not opening fully as high EGT at high rpm under load- a spring allowing full travel of the wastegate fixed this.

LTL Diesel

I did not check for travel after modifying, I will pressurize the wastegate line and check for full travel next chance I get. Thanks