overheating TD Vanagon

[witoke]

Okay, boost gauge fitted. Tested with the BOV untouched and I could get max 10 psi. Disabled the BOV with a bolt per previous threads and went for a drive. Maxed out at 10psi. So whatever it was it was not my BOV holding things up.

Now I thought I understood that the way to get more boost was to add more fuel. But if I add fuel will that not just create boost in proportion to the fuel increase and so not solve my EGT problem? Or is there some other way to add boost?

I will use the "Search" and try to find that answer as well as the answer to how to test the operation of the waste-gate.

[jimfoo]

The wastegate is probably working as 10 psi is a fairly normal stock setting. You will need to find out how to adjust it for your particular turbo to increase the boost. It will probably entail turning in a screw on the actuator.

[jtanguay]

The wastegate is probably working as 10 psi is a fairly normal stock setting. You will need to find out how to adjust it for your particular turbo to increase the boost. It will probably entail turning in a screw on the actuator.

1x.  if the BOV was regulating boost, you would hit 12-13 psi, then a big surge in power, boost would drop to about 4-5 psi, and then it would close and boost would rise from there.  wastegate hits 10 psi, and regulates boost pressure quite smoothly and reliably.  you can also try using a manual boost controller, as it just 'tricks' the wastegate into thinking the turbo has not yet achieved the correct pressure, so it stays closed longer (depending on the setting)

[witoke]

Thank you, people on this forum have really been fantastically helpful. Crawling around under the van I did see a bolt with a locking nut on the end of the waste-gate. I will try turning that in a bit and see what gives. Systematically of course.

I did a search for various things but as yet had not found anything specific.
As an aside the engine seems to be loosening up a bit and the fuel consumption seems to be getting better even with the leaky IP.

[Baxter]

Thank you, people on this forum have really been fantastically helpful. Crawling around under the van I did see a bolt with a locking nut on the end of the waste-gate. I will try turning that in a bit and see what gives. Systematically of course.

I did a search for various things but as yet had not found anything specific.
As an aside the engine seems to be loosening up a bit and the fuel consumption seems to be getting better even with the leaky IP.

General consensus seems to be just to wind the fecker right in and regulate boost with your residual fuel screw.

With all the vans I have messed with I never seem to be able to achieve anything more noteworth than about 1 bar (15psi)

[witoke]

With that earthy a description I'm figuring your from  'oop north' somewhere..

But hey, maybe I'll try that after this weekends camping trip, once I figure out where the residual fuel screw is....