Duramax Turbo Help/ Suggestions

[Matts94Z28]

Originally Posted by brokesmoke

Not a problem at all-

One of the biggest things is building the entire turbo intake setup. I'm ordering a S&B cold air intake kit for an LBZ and will only be using the enclosed air filter housing out of the kit. They will be then making a 5" intake tube from the S&B box over to the turbo inlet out of mandrel bent pipe. The S&B stock piping can not be used due to the 5.5" turbo inlet. They are also building/mandrel bending a 4" down pipe for it as the exhaust housing is 4" and getting rid of the 3" down pipe I already have installed. I also wanted the y bridge replaced so I don't run the chance of blowing the gasket out of my stock one so they will be fabricating a new y bridge also to match the 7" tall turbo pedestal. The turbo pedestal will have a provision added to it for a waste gate for when I build the motor or twin over this turbo later. They are swapping the standard 1.1 exhaust housing over to a .9 to help spool up and drive ability since it will still be my DD.

As far as the transmission they actually measure and verify the after market parts and have extras of different sizes on hand to swap them around for different tolerances or will machine down anything that does not fit correctly. A lot of Allison rebuild/build kits come with generic parts and most people just shove them in the trans and hope they work because they "came in a kit" but do not take the time to verify tolerances of the replacement internals. They will also be tuning the ecm and tcm to match the new characteristics of the trans and turbo.

There are other things, but those are the biggest.

Sounds like a fun build. What is the build time?