My old MBC did fine but after I went on a run with one of my local car clubs I was getting some spikes to 24 psi or so. It would usually spike to 20-22 then settle at around 19.
I got to thinking how nice it would be if I could turn that boost controller down from inside the car but I didn't want to run long vac lines because it is best to have the least possible distance between the mbc and wastegate.
Was real curious as to what might be out there beyond the world of grainger valves (not that there is anything wrong with that) and found this hallman evo RX. The RX is a ceramic ball that seems to weigh absolutly nothing and the evo part is a cable ----pit adjustment. (I guess you cant actually use that bad word for the interior of a car on this site?) So we have to say penis pit? OK the evo part is a penis pit adjustment.Sorry wasn't trying tp talk about my ----. Didn't realize ----pit was verbotten.
Anyhoo.
Here it is and how I installed it.
First the controller itself.
Next thing was to find a vac source close to the turbo. I eliminated my EGR of course and had an alum block off plate in place of the egr deal on the intake so I just tapped that and installed a nipple yes I said nipple.
Then I needed a place to mount it. I was going to just remove one of the bolts that holds the 2 piece together but the I realized that it was going to be almost impossible to get the bolt started with that long stiff cable connected to the MBC. I found a longer bolt and just ran it past the top of the intake and used a nut to hold the MBC in place.
Now I had to find a place to run that cable through. Best place I could find was the grommet where all the wires come through the firewall to go the the logic module. I drilled through that grommet (yes I did cut some of the precioius shleby metal but not too much). The metal you see the cable going through here is actually the bracket that holds the wire grommet.
Next thing is to hook up the hoses to the MBC. They are nice and short as they should be.
Took me a while to figure out how to mount the adjustment knob where I wanted it but I finally tried just putting it through the hole and leaving the mt bracket on the back of it. Worked out perfect.
So the question is how does it work? It's night and day over the MBC I was using. It is currently set at 19 psi and that's exactly where it stays. Pretty much --- soon as you floor it until past redline. With the old MBC it would spike to 22ish psi and immediatly drop off. Now it just holds wherever it is set. Car actually feels faster with slightly lower peak boost. It just holds it more consitantly.
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Originally Posted by Marcus86GLHS
I mounted my start button in the old cig lighter hole and used the top of a cig lighter to finish it out. Now it looks like a cig lighter again. 
