Go back to this post to see some details I already covered about where the wastegate line gets connected with stage 2, and where it really should get connected: http://jeeplab.com/showthread.php?14...ull=1#post2740

Quick review...

This link has cool info and pictures to explain stuff: http://www.miataturbo.net/diy-turbo-...eed-ebc-47532/



The wastegate should be connected to position "B", between the intercooler and the throttle body.

Stage 1 has the wastegate connected to position "A". Since stage 1 has no intercooler, this is fine. Without an intercooler, there is no significant difference in pressure measured from position "A" or position "B".

NOLA's problem is that he has the intercooler now, but his wastegate is still connected to position "A". He is experiencing lower peak boost as well as "boost sag", which is explained in the link above.

The official instructions for stage 2 have you connect the wastegate to position "C". This post explains why position "C" is bad: http://www.miataturbo.net/diy-turbo-...32/#post574757


For my install, I used one of these to add a boost source at position "B" for my wastegate:
http://www.atpturbo.com/mm5/merchant...egory_Code=BCS





Here's the boost source for my waste gate:




I zip-tied the waste gate line to the BOV line, and at two points on the radiator fan shroud. One of the points is simply tied to an existing wire that is secured to the fan shroud. I had to drill a small hole through an "arm" of the fan shroud closer to the BOV to add a zip tie there and hold the wastegate line away from the exhaust down pipe.




And here's how my BOV line is teed into an existing vacuum source on the intake manifold: