Okay so im having quite a fun time trying to find a proper vacuum line to hook up my hks evc. i need something thats 4mm in diameter. i was thinking the line from the regulator, well atleast i think it would work... anyways can anyone confirm this for me? ive included a picture for reference. my car is a 1989 turbo ii, and im following the yellow line coming out of the fuel pressure regulator on the right. would it be okay for me to put a T fitting there and feed vacuum to my boost controller? thanks!!!

 

how about the line between the compressor and the wastegate?

 

Not knowing which version of the EVC you have...For example, my EVC 6 requires only a boost reference line and then the lines to the compressor/wastegate.

The boost reference line can be any vacuum hose, so just use the one that goes to the stock boost/pressure sensor. Then connect up the lines between the compressor and wastegate actuator according to the instructions.

You have made the appropriate fuel modifications that allow you to raise the boost, right? If not, then installing a boost controller will be the first step in your upcoming engine rebuild.

 

The FPR line will work. However, *IF* the solenoid gets stuck closed, your boost controller won't see the correct pressure. I'd suggest using a tee off an uninterrupted line such as the stock boost sensor line mentioned above.

 

I have the evc 6 too. According to the manual, i need a line to read boost, a line that goes to the waste gate and a line for vacuum. So far ive connected a line from the waste gate to the sensor, and got my boost signal from the turbo tee connector (i unplugged the green line from the tee and capped it off, took the original line going to the waste gate and used it for my boost signal). Now i just need a vacuum signal. The reason im installing this right now is cause i got the controller for free and i dont plan on increasing the boost until proper precautions have been made. And also, dont i need a vacuum source that is after the throttle body? The boost sensor line would give me boost wouldnt it?

heres the routing for the evc.

 

"T" the pressure sensor line(yellow).
Or if you have any open vacuum ports on the manifold use that.
I assume you put that vacuum diagram up as you have the hoses,etc already on and are stock,so T the Yellow Map sensor line..easy.

 

alright thanks mistery! i thought that line was pressure, so i didnt even take notice on it.

 

no problem LOGGY-TIGHTS!.heh,heh!
just call me STYX. (as in Mister-STYX)

 

I'm about to install a boost controller also but was wondering what supporting fuel mods do I need to do so?

 

moar fuel

 

So what bigger injectors, larger fuel pump, adjustable fuel pressure regulator? If I just want to up the boost to 10lbs what sporting fuel mods would I need

 

I was running 8-10lbs are fine with stock injectors, but you need a larger fuel pump thats all.

Only difference between us is mines Jspec tuned ECU, you could get away with blocking off old valves just screw or cap them off better to get to the root but who can on small job...

I still don't understand though Asuming your re-routing the old boost controller the Old vacume line that ran from the turbo to the stock controller can be left on a,s it would close the connection as a vacume line; but I asume capping it off might be easier to undertstand for future mods.

Aside from using 4 all hooked up to my wastegate and upper compressor line not middle T'd.
To the solinoid, and a pressure line to the gauge or a seperate pressure sensor.
always 3... Asuming 10pounds isn't good on a un-modded ECU I would suggest a solid 7-8.

Everytime I see 1BAR or 10lbs it's chipped or tuned. With stock injectors and upgraded fuel pump. Once you get above 12, I only hear bad. Fuel pressure regulator is just usefull rather then required.

Currently having issues with mine (two much fuel for two reasons the boost controller and black sparkplugs....)
Highly suggest under 10 untill you get a fuel pump, It most likey won't keep up and cause more then it's worth.

But like mine, My ecu is sending too much fuel and my plugs are already flooded from lots of (this). <2 problems>

 

ok well i just finished hooking up the boost controller, everything seems to be working except that i get a boost drop after 6000 rpm. i got it to maintain 8-8.4 psi from 0-6000 rpm but after that point i see a drop down to 4-5 psi. i forgot how the boost was maintained with the factory boost controllers, but i did read that the hot side of the turbo is very restrictive. my car is stock except for this boost controller. i just wanted to confirm that this was normal for the car.

 

its normal to drop off at high rpm, the turbo just doesnt flow enough to keep the boost up that high..

 

So what if i had like a racing beat turbo back system. Would that allow for boost to hold at higher rpms?

 

that system alone will make you hit FC, trust me. but it def adds POWA!!!!

 

no, the turbo just can't deliver, period

 

A-men, I don't want to know 10pounds does with stock pump, asuming it works but it must be tough.
Even at 10psi with stock injectors it can suffer. Not even stock these are the 550 HI imp, on a S4 their low Imp. I even see lots of drops.

If your goal is simply boosting to a point where most are uncomfortable, Gotta think of the most expensive ways... Fuel for the most part...
Lol that's how it is for almost anything: more power more MONAYEEEEE!

From little experience even i have found that everysingle piece of "boost" input on this thread alone, pretty well somes up all Base and future issues.

Eatherway ALL THE POWER TO YOU! it's yours I think? Good luck and may all good come.