Turbo help please?

Jeff.Saunders wrote: 110lb seems low - although if the engine is cold, it might explain some of this.

My engine has 8:1 pistons. I was getting 135 +/- psi when the engine was first rebuilt.

You may want to run a leak down test - if the engine is fresh, you should expect to see within 5% or better.

Make sure you haven't overfilled the oil.
Make sure the ID of the oil return hose is large enough to move oil out of the oil quickly. From memory mine is 3/8" ID and I made sure the hose didn't have an uphill run.

Where is your oil return dumping the oil back into the cases?

turboking wrote: my big block 14 28 turbo 0nly uses the stock vent......no oil /smoking problems :ohmy: ...... :blink: Sounds like a return/drain issue to me.... Pics of the return /drain would help...... the oil return line and fitting are properly sized ,clear ,open ,inside of hose is not separating and not kinked, clogged in any way ..... the drain hose is running down hill from the turbo drain on the bottom of the turbo your drain to the cases.......... you can break the fitting on the drain hose to the case and check that sufficient oil is draining while running (use a catch can and a funnel) ...if not oil will back up and blow past the seal on the intake side of the turbo. :S I know you wrote the turbo was just rebuilt by MR.turbo . keep us posted :ohmy:

turboking wrote: check your pm