I am about to install the evolution wastegate from my TN kit, I noticed that the top port is to be plugged with a filtered vent, or hooked to the boost controller. It also mentions that if using a controller, the line is not to be T'd into.

Problem: When I installed my gauges, I T'd into the line running to my gauge behind my dash and left a loose hose under the shifter finisher to go into my controller when installed. Is this T ok? its not like its T'ing into another line where the pressure could change, its going to a dead end, so its more like just having a longer line.

But this brings up another problem, will the gauge read accurately even though it is plugged into the wastegate? I think it will but the install said to tap into a vacum line on the top of the engine.

 

i don't understand what line you t'd into for the boost gauge. You need to make sure it's tied into a good source of manifold pressure. You also said you have an unhooked line waiting to be hooked to the boost controller. Is that the line that is hooked to your wastegate or is it hooked to manifold pressure?

 

There is a line from behind my radio running into the engine bay, just coiled up and not hooked to anything. Behind my radio that line has a T - one to the boost gauge, one to the controller.

The wastegate instructions say that the top port in the wastegate goes to the boost controller, but I forgot about the solenoid that came with the controller, so I need to go check the instructions on the controller again, but I think I'm fine now.

Top port of wastegate to boost controller solenoid, and the line to the boost controller and gauge just goes to manifold pressure. I need to stop being a noob, but let me know if that sounds correct.

 

what boost controller and gauge are you using? That sounds about right, usually the solenoid will have a vacuum line that goes to manifold pressure too.

 

greddy profec b spec II. I got it a long time ago and had it laying around so I'm going to put it on. I just need to read through the BOV, wastegate, and controller instructions again. I have the glow shift manual boost gauge, I know its cheap but I figured I'll have the boost controller displaying pressure (i think it does this) as well so if their readings are completely different I'll try another brand boost gauge.

 

Ok, went back and did a little research, I am about 99% positive that the first diagram is how everything has to go. I am just not sure about the emanage ultimate sensor, I bought it used and don't have instructions yet. If I left anything out, please let me know, and I'm using the TN raptor BOV and TN evolution wastegate.

[IMG]<a href="http://s254.photobucket.com/albums/hh92/Chudsoncoupe/?action=view&current=Vacuumlinelayout-1.jpg" target="_blank"><img src="http://i254.photobucket.com/albums/hh92/Chudsoncoupe/Vacuumlinelayout-1.jpg" border="0" alt="Photobucket"></a>[/IMG]

 

i'm not understanding your drawing, the bov normally only has one line connected to it and that goes to the manifold. the wastegate if it's a two port should have one port go to manifold and the other to the solenoid. Basically you'll have either a few t's to tie everything into the manifold or else get a vacuum manifold.

 

there are two ports in my raptor BOV, The manifold pressure controls most of the action, but there will be quicker response if you T into the compressor line as well.

The instructions on the wastegate and boost controller say to use the wastegate to control the boost, not the BOV.

 

the wastegate does control the boost the bov just prevents compressor surge. sorry but i don't have any experience with that bov as most bov's only have one port and they are opened by vaccuum from the manifold.

 

I'm pretty sure the diagram is right, just not sure about the emanage vacum sensor yet.

Also, I've got a question regarding the controller and wastegate, my roomate's TT supra has a wastegate spring for 11psi. He put the boost controller in and has set the limit to 18. His controller will not open the wastegate, it only keeps it from opening until the limit is reached, so he can't turn the boost below 11psi. (He has an internal wastegate, different style than mine) So if I have the 9psi spring in my wastegate, does this mean that my boost controller is only good if I want to go above 9psi? I originally thought that the controller could open the wastegate so that I could limit the boost to under 9 at times. Am I just backwards on this or can some controllers limit the boost to a lower level than what the spring allows?

I can always just change the spring in the wastegate, but it only came with the 9 and I wanted to limit the boost to 6 until I got the emanage ultimate and tune done.

 

i believe the emanage should be tied into the vacuum line from the manifold as well. You are right, you can not limit your boost below the wastegate spring. So if you have a 9 lb spring it may only boost 8 lbs off of the spring but you can't go any lower without a smaller spring. The boost controller is for raising the boost and controlling the boost such as some boost controllers will allow different boost settings for different gears and you can also hold the wastegates shut to build boost quicker.

 

You've got it a bit backwards. The boost controller can only hold the wastegate closed, so it can only regulate boost to a higher level than the wastgate spring. Your lowest boost setting is your wastegate spring.

The 9lb spring that comes with the Turbonetics kit is 9psi at the compressor. This doesn't take into effect pressure drop across the intercooler. With that spring you should hit 8-8.5psi at the manifold.

I haven't really spoken up so far as I'm not too familiar with the greddy profec. One thing I will say is that you should only have one line going to the BoV, and that is T'd off the intake manifold.

One thing I'm not absoloutely positive of is if the line from the compressor goes to the boost control solenoid or the map sensor on the boost controller. I guess that's something you'd have to look up in the install documentation.

 

I'm glad you finally spoke up Taurran haha, I was about to just PM you.

I understand the control of the wastegate now, and I wish the controller could work both ways, but I'll just put a lighter different spring on. Theres really no point of a controller if I don't want to go past 8.5 and I have the 9lb spring installed (assuming a bit of pressure drop). And the controller part of the diagram is correct for this model controller.

The instructions in the Raptor BOV say that hooking the extra port to the compressor psi will give it better response even though the manifold pressure is the key line. If I dont do that they say to plug it with a filter fiting that will allow it to breathe. Why has no one done this, is there a downside to using both ports? I would think quicker response = better safety, less time for surge (even though it would be minimal)

 

Ahh yeah, I went back and double checked the documentation for the raptor, and that's what it appears to be there for. I haven't actually seen anyone run this off the compressor outlet, but I personally wouldn't bother with adding yet another T off the compressor outlet on top of what you'll already have. I don't think you'll see any noticable difference that will make it worth the trouble. You're welcome to try it though.

Here's an old pic of how I had mine when I was running the stock kit. I never had any issues.

 

Ok, well I'm going to try it both ways and see if I can tell the difference.

Also, instead of going to a lighter spring in the wastegate, what if I remove the spring all together? In theory, this would allow my boost controller to make the car NA if I wanted (not that I would). But, would the wastegate still function without a spring? That is the only real problem that I can see. I would like to be able to do this but Im really not sure if the wastegate would still function properly without a spring.

 

You need a spring in there for the actuator to function properly.

On my stock motor setup I dropped in a 7lb spring which gave me a base of about 6.5psi. I normally ran 9psi on the street though.

 

your wastegate would not operate without a spring.