kevboost7

Some advice, i realized that the cable broke, because there is a big ass washer on the seatbelt thing and it was squeezing the cable causing it to have extra tension. Make sure that big washer isn't sandwiching the cable.

I replaced this cable recently. I purchased it from concept Z performance. And it was a R34 one. Can confirm it works. https://conceptzperformance.com/nissan-infiniti-nissan-oem-trunk-lid-gas-filler-opener-cable-nissan-skyline-r34-gt-r-gtt-84650-aa100_p_56279.php

Is it possible that there is a leak somewhere? or if my turbos are gone? or if my wastegates are stuck?

Not sure why everyone thinks i hooked it up wrong, but Josh is spot on with my vacuum line set-up. The picture of my MAC valve shows the 2 red vacuum lines going to the water/coolant combo pipe and the black vacuum line is going to the last nipple under the plenum. (See below) Josh i have a few questions: 1. You might need to use an air compressor or just blow through the hoses. When it's off it should connect port 3 to port - Can i blow air with my mouth? 2. Put 14 psi into port 1 vacuum line and verify you can hear it venting into the intake piping before the turbos. It shouldn't hold pressure substantially. - Why 14 PSI? I have a compressor, but im not sure if i can get it to those tolerances.

Hey guys, sorry i just got back from my trip to greece. I was able to take a video of everything. See the link. Dont judge me for the spaghetti wiring/hose mess right now lol

1. I thought this turbo pressure line comes from the plenum? Is there a way to get the turbo pressure line near the turbos? 2. How do i plumb in the selonoid in its internal gate so it goes only 1 way?

im about to just drive this car off a cliff I swear i hooked up everything exactly like the diagram. could it be a boost leak?

yessir, haltech platinum is in. I did multiple runs and my manifold pressure (boost pressure) never exceeds 8psi. All the settings are correct. Open boost with 33 hz. No matter what duty cycle % i put, it dosent change boost pressure.

I found it in my glovebox. Looks like whoever owned it before had did some snipping. No clue what it is for. Any ideas?

Alright, i connected everything properly, but my car isn't boosting past 7-8psi. Any ideas? 3 Port Solenoid is working, i hear it clicking.

im talking about a generic diagram. Like this one:

Interesting. Those turbocharged engine diagrams usually has all the boost go straight into the intake valve lol. So i thought they were the same thing.

Does the factory boost gauge pressure = turbo pressure? Couldn't i just T into that line by the firewall? I mean its too late, i already shredded all the skin on my hands, but man.. https://www.gtrusablog.com/2019/06/where-do-i-tap-my-rb26-for-boost-sensor.html

Thanks man. Im in the garage now. Dear god, that last hose is so far back. I forgot how much of a pain in the ass it was to work under the plenum.

Can someone explain what the blue line is then? Green is waste gate. What is the blue? And why is the plenum "turbo pressure"?

@GTSBoy @joshuaho96 Thank you guys, and especially thank you josh for that diagram you made. It is clear for me now. Why does the 3 Port only come with 2 of the barb fittings? I will have to buy another barb fitting now. @r32-25t There are no professionals near me. I am learning, which is important to me and one of the reasons i got this car. And the one professional i took it too was my tuner, who told me to get rid of all the 30 year old hoses and just run new hoses from the wastegates. I felt like there was a better way to do it. Thats why im on here.

Okay thats what i thought you were trying to say. I will give that a shot tomorrow. It just did not seem right, because every diagram i see on the internet has 1 port on the 3MAC Valve with the cap that vents to atmosphere. I'm still confused, on this diagram below with the twins. I thought that the "turbo pressure" line was the blue line. In the RB26, where is the turbo pressure line?

thats literally what i did!

@joshuaho96 I'm sorry josh , i dont know if i'm dumb or missing something here, but your original diagram makes no sense with my configuration. I have internal waste gates. This is what you said: "Port 1 is the blue line. Port 2 is the green line. Port 3 is also the green line. The key point is that you will have to modify the vacuum line for port 3. Instead of tying port 2 and 3 together you cap the vacuum line on the combo coolant/vacuum pipe and the line on the plenum goes directly to the valve. Port 2 has unchanged routing." based on that description of what you said above^^ this is what the connections should look like below: is that what you are suggesting? Port 1 on the Mac valve (vent to atmosphere) should go back to the turbo pressure?

According to your explanation @joshuaho96 this is how it should be connected right? What i don't understand is that if i route all the lines like this... how is the plenum equal to the wastegate line? I thought port 2 on the MAC valve should be port the waste gate line? I really appreciate you guys helping me look at these diagrams.

Right now, this is how everything is connected in my car. According to the theory, everything should be working.. its just that other green line going to the plenum that is confusing me.

What happens if the factory solenoid is not activated and it is not tied to the plenum? Wont it just bleed the air back? And when you say blue line, isn't the blue line the turbo pressure?

What is confusing me is the green line going to the wastegates that is also connected to the plenum. Why can't i just replace the factory boost selonoid with a 3 port mac? Why do i have to cap off the factory dual vacuum/coolant pipe and use the line from the plenum?

are you in the states? i wish i could talk to you on the phone. Not sure if you're up for that. My number is 703-626-8787

Hey @joshuaho96 i got my car tuned last weekend, and we installed the 3 port mac. The tuner turned up the boost on the computer, but it wasn't actually boosting any higher... i'm re-reading your instructions and they are confusing. "Port 1 is the blue line. Port 2 is the green line. Port 3 is also the green line. The key point is that you will have to modify the vacuum line for port 3. Instead of tying port 2 and 3 together you cap the vacuum line on the combo coolant/vacuum pipe and the line on the plenum goes directly to the valve. Port 2 has unchanged routing." What you said in quotation above, does not align with the diagram with the twin turbos. According to the diagram, port 2 is the wastegate and would be the green line.