Valve cover breathers plumbed into exhaust...

[8AV8]

Will this pull as much vacuum as an LT1 pump or at least enough to do the job?

Big block guys do this. Will it work for us?

 

[Nick Micale]

Will this pull as much vacuum as an LT1 pump or at least enough to do the job?

Big block guys do this. Will it work for us?

The non-turbo engines have much more velocity in their header, so the exhaust/vac systems work for them.

When the exhaust exits the turbo, flow velocity is very much reduced, and we have found it does not work for exhaust vac.

The factory breather pipe from the pass side valve cover does work for crankcase evacuation as we have gone back to that on many cars.

The LT-1 or Mustang vac pump will work well for 9 and 10 sec. T-R's.

 

[wickedtt]

The non-turbo engines have much more velocity in their header, so the exhaust/vac systems work for them.

When the exhaust exits the turbo, flow velocity is very much reduced, and we have found it does not work for exhaust vac.

The factory breather pipe from the pass side valve cover does work for crankcase evacuation as we have gone back to that on many cars.

The LT-1 or Mustang vac pump will work well for 9 and 10 sec. T-R's.

Are you using anything special with the factory beather pipe from the pass side valve cover or using it just as the factory did?