+1 on the E-vac system...after seeing Andy's at TDIfest 2012 I began fabricating my own E-vac system out of stuff I had around the shop and a little welding. I notice more power with it installed...mine is on my 91 GTI of course
Thanks! And, the next time we meet, you've got to take me for a ride in that machine of yours. I missed out in Ypsilanti!
Would you be willing to run some tests on the system and provide supporting data?
What kind of tests would you like to have conducted?
- I can tell you, if there's any back pressure, it is very very close to zero because my engine does not leak oil anywhere!
- In due time, I'd like to install a vacuum/turbo gauge to see how the vacuum/pressure fluctuates?
The only tests I ran were very crude. I initially installed the E-vac device pre-CAT. There was obviuos back pressure, bad results. I re-located the device post-CAT and could "feel" with my "spit wet" finger a distinct pulsing vacuum at idle!
Now, doing a HP test on a dyno machine, I'll leave that to Chris.
The E-vac System (or similar) has been around for years. The dudes that run big engines in the mud bog competitions here in my neck of the woods have one on each bank of a V-8 engine (that's 8 cylinders).
Lastly, if my engine runs better with this system, which I firmly believe it does, then it is obviously more efficient!.... thus, overall, less pollution!