Pan E Vac's

Jeff Teuton · 12-30-2014, 05:45 PM

We went back to back on the dyno about 3 or 4 years ago. Nothing fancy, just tubes in the collector tied to the valve covers. This was a 440 SS motor, made 6 hp no changes. Made two pulls that were identical. And we just always run them in SS.

nolongerracing · 12-30-2014, 11:33 PM

Did anyone use a vacuum gauge to make sure you were pulling vacuum? It takes time to seal all the leaks and if it's set up right, you can pull nearly 5 inches. It's worth the effort.

GTX5877 · 01-01-2015, 12:15 PM

Have done A-B-A testing on many types of engines, always worth 5+ hp. Connecting vacuum gauge on dyno is very important to affirm gasket sealing. Can pull 5" on a nothing fancy system. Have heard as high as 10" achievable with some work. Smoke machines very helpful, especially on vacuum pump engines to find pesky vacuum leaks. If it has vacuum leaks, it will not create a vacuum. And the obvious...ring package and ring seal always play a big part in the effectiveness.

Tom Hestness

12-30-2014, 05:45 PM	#1
Jeff Teuton VIP Member Join Date: Jan 2002 Location: Houma, LA Posts: 2,717 Likes: 2 Liked 325 Times in 50 Posts	Re: Pan E Vac's We went back to back on the dyno about 3 or 4 years ago. Nothing fancy, just tubes in the collector tied to the valve covers. This was a 440 SS motor, made 6 hp no changes. Made two pulls that were identical. And we just always run them in SS. __________________ Jeff Teuton 4022 STK

12-30-2014, 11:33 PM	#2
nolongerracing Member Join Date: Oct 2006 Posts: 173 Likes: 2 Liked 72 Times in 27 Posts	Re: Pan E Vac's Did anyone use a vacuum gauge to make sure you were pulling vacuum? It takes time to seal all the leaks and if it's set up right, you can pull nearly 5 inches. It's worth the effort.

01-01-2015, 12:15 PM	#3
GTX5877 Junior Member Join Date: Jun 2005 Location: Albert Lea, MN Posts: 52 Likes: 3 Liked 20 Times in 9 Posts	Re: Pan E Vac's Have done A-B-A testing on many types of engines, always worth 5+ hp. Connecting vacuum gauge on dyno is very important to affirm gasket sealing. Can pull 5" on a nothing fancy system. Have heard as high as 10" achievable with some work. Smoke machines very helpful, especially on vacuum pump engines to find pesky vacuum leaks. If it has vacuum leaks, it will not create a vacuum. And the obvious...ring package and ring seal always play a big part in the effectiveness. Tom Hestness

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