need help with external wastegate setup

[hysteria]

ok well here's the deal... (and before i ask all this i have done searches that reveal some of this info, but not everything)... i know, because i have seen the diagrams and seen multiple times people posting about the way you route vacuum lines to a tial wastegate... leave the top port open unless you have a ebc or something like that...

i need to know about a wastegate that isn't tial... i have a wastegate that is comparably setup like a turbonetics wastegate. the turbonetics gate says "vacuum" on the top and "boost" on the side i believe.

anyway so the question is this... on my car if i hooked up my intake manifold to the side port then the wastegate would never open under vacuum and then my turbo would have excess heat whenever the car was just running normally. when i have the port hooked up on top the wastegate opens every time the throttle is closed and there is vacuum/ when the car is idling. so how do i hook this up? is vacuum supposed to be on the side, on the top or what? is the gate supposed to be closed always unless you have a ebc or mbc hooked up? from the diagram of tials wastegate they have one vacuum line that splits to two. one of the splits goes to an ebc and then to the top port and one split goes straight to the side port. are all external wastegate of this same design?

keep in mind that i have no mbc, or ebc. i am running strictly off of the wastegate at this point, and i have not boosted my car because i'm just about done breaking it all in and have not installed my new intercooler yet... that will happen this weekend hopefully but we will see how much time i have...

thanks for the help.

[Red-KAT]

Whats the brand? Someone might have one and be able to point you the right way...

You could always just try the Tial setup and see if it works... The Tial setup also shows the pressure coming from right in front of the TB. So that's how I shall do mine.

Just go into boost slowly ad you should be fine for testing it.

[hysteria]

thanks for the reply... yeah i was thinking about doing that, just sort of testing it to see what happens. i mean i'm obviously going to use one or the other so i guess it's not a bad idea, just wanted to see if anyone else knows for sure how the turbonetics one reacts. the one i have is the infamous xs power wastegate, and like i said the vacuum ports appear to be the same as the turbonetics one my brother has.

[nissanfanatic]

On my Turbonetics Evolution wastegate, I ran a line from my intake manifold to the bottom port and left the top port open. The car runs fine and boost is at 6psi with no problems. Excess heat when running normally? How hot do you think the turbine gets when in WOT? Watch Ivan's videos with that bottom mount and you'll see the manfold glow.

[hysteria]

no i mean i was just looking at water temp... no comment on the actual exhaust temp... i know that **** gets hot but you know the cooler the better, so i was wondering if i needed the top vacuum port hooked up so it would stay open and let the exhaust gases escape easier to keep things cooler you know? I have the top one hooked up right now because of just that reasoning, and so i wanted to keep it that way because i'm sure the little excassive heat i have now will just be amplified later when i'm boosting up a lot.

[Red-KAT]

wow... what you said makes no sense at all to me...

Why would keeping the wastegate open all the time keep your water temp down?

Also why would you want the wastegate open... Your just going to create more lag.

If you are that worried about how hot your engine is get a water temp gage. I'm sure its going to be fine... (Unless you have some other unknown issues)

[hysteria]

ok well i'll try to be more clear... the way i see it (and since i have tried both ways and DID notice a very slight difference in water temp) when the wastegate is open it lets gases flow out of the manifold easier, thus lowering the amount of trapped gases and overall temp of exhaust manifold. if the wastegate stays closed the whole time then the heat stays in the manifold more, and raises the overall temp of the engine, and i guess my water temp was effected by this. it was a very slight difference (it put it just past half way up the stock temp gauge, while it generally sits just below half way) but i was just concerned considering it may make more of a difference as i described before when i am boosting all over the place.

[hysteria]

oh about the lag issue. i mean i haven't been boosting my car up much (maybe 1-2, maybe 3 psi at the most) because i am waiting on my damn intercooler to arrive, but there really is very little lag... as soon as i put the car's throttle open enough to have 0 vacuum the wastegate is closed and the turbo spools quick as hell. i guess there is a little difference btween always having the gases going past the turbo... i mean when it's like that there is virtually no lag at all, but i mean i can live with a little if it's going to make a difference in the life of my engine.

[:: orion ::]

Your water temp rose due to some other factor...

While you theory makes some sense, the turbine housing is NOT that much of a restriction to require a bypass...unless you're running a stock VW 1.8t turbo (so tiny it spools at idle).

That, and the stock termp gauge is NOT accurate at all...it's a 3 position switch, rather than a gauge.

1) Less than 150 F2) Between 150 F and 220F3) Overheating (over 220 F)

Any little movement like that cannot be relied upon.

So there is no advantage to making your wastegate open under vac....not longer engine life, nothing.

- Brian

[hysteria]

you're probably right... the other day i did a radiator flush and now my temp is kind of weird... i think my thermostat is just worn out or something. i'm going to replace that and change the vacuum line over to the side port and then ease into boost. anyway thanks for the help guys.