Blocking off Waste Gate???

Ouh, it is Cat. We did it with DD and Mercedes))))
LOL

CAT ET) no, you can download cal. file only, but not to change it

 

If you come in for warranty on a Cat and the little blue hose shows any signs of being blocked or tied the claim will be denied.
The waist gated turbo is designed, to give maximum boost at a low RPM, and as the intake boost goes up it bypasses exhaust gasses directly to the exhaust system without going threw the turbo. If you add extra air into the engine that is not needed, you increase the friction HP of the engine with absolutely no benefit. Friction HP is the power it takes to turn the engine at speed, with no fuel used.
Detroit and Mercedes use a speed sensor in the turbo to monitor the shaft speed.
These engine companies have high priced engineers developing these engine to make the HP and torque and live. Then you get someone that knows better and eliminates a system. well if they really knew they would be developing engines not ******* someone else's design.

 

With CAT engines unless he had passwords the only thing he did to add fuel was change the Injector Calibration Codes. This isn't enough of a Hp/fuel change to effect EGTs with the wastegates hooked up and functional on the stock turbos. Install new hoses between the wastegates actuators and compressor covers to allow them to see boost pressure and function properly. As John said it's a waste of fuel and energy trying to build more boost with this modification.

The reason he couldn't do this to the Acert engines is the injectors use files for calibration instead of numbers. CAT did this to keep people from playing with the calibration codes as this guy did in the 6NZ engines. You'll have to pull the valve covers on the 6NZ engines to get the proper trim number of each injector and program them back into the ECM. The drivers may complain about a slight power drop, but they should also notice how much smoother the engine runs also. Tell em tuff #### and get over it, its not their truck

 

The only thing your mechanic could have done to your 6NZ's to "add fuel" without a password generator and a hot flash file is to change injector trim codes. With or without the wastegate blocked it isn't going to make any difference power wise. Blocking the wastegate on the MXS is bad because the twin turbos can build more than your head gasket is going to like. An MXS with a modded ECM and the wastegate blocked can easily make close to 100psi. Blocking the wastegate on a 6NZ just spins the already weak stock turbo too fast. Sure it makes more boost but since it's out of its map range the air is hot and not helpful.

 

#### Kurt you beat me by 3 minutes. Haha

 

I run a boost controller on 6nz that i can run with a toogle switch. They use them alot on the import cars. and on single turbo 6nz most pressure u might get is 45lbs. and the head can handle that with no problem. with stock turbo.