Dealing with your wastegate

[luismaster7]

I dont know how you guys have your wastegate setup but basically my wastegate exhaust points down and it releases the air to the ground and the exhaust is right next to my right intercooler pipe.

Im afraid that the hot air eventually is going to melt the rubber seal that holds the two different pipes together and cause a nasty mess down there. Im running 20 psi right now with no boost controller. I have a bleeder type of setup. I bought the car like that and havent gotten around to installing a boost controller.

So what do you guys recommend i do? I got some advice to extend the piping to the side and heat wrap the whole exhaust but I have no welding skills and so far havent been able to find pipes that i can just hook up and clamp. Also i was recommend to put thermo reflect heat tape around the pipes to push back some of that from the pipe.

Any input would be appreciated thanks.

 

[LiquidX]

You will want to route it away from the pipe or route it back into the exhaust. You will quickly melt the coupler and substantially heat up the IC pipe (air charge) when running WOT.

Note that you cannot lower boost below the wastegate spring pressure. If you are at 20 psi on wastegate pressure then you can not go below that, only above. So unless you have plan of going above 20 psi then you don't need a boost controller.

Since you don't have your profile filled out, what are you using to tune and what are your fuel mods since you are running 20 psi (turbo information required since psi is a variable between turbos, CFM is a better number).

Also again, if you have emissions where you live, an o2 dump will not pass since you are evacuating un filtered exhaust which is basically a controlled exhaust leak.

 

[luismaster7]

i dont have emissions here so im good. And im using a 10 psi spring so it starts off at 10 psi and as i floor it, it shoots up to 20 psi. and i'll have to get to back to you fuel mods. i just bought the car about a week ago and im still waiting on the full mod list. but i was thinking of routing it to the side in front of the left wheel and behind the front bumper so its no where in my car.

 

[LiquidX]

i dont have emissions here so im good. And im using a 10 psi spring so it starts off at 10 psi and as i floor it, it shoots up to 20 psi. and i'll have to get to back to you fuel mods. i just bought the car about a week ago and im still waiting on the full mod list. but i was thinking of routing it to the side in front of the left wheel and behind the front bumper so its no where in my car.

What kind of turbo because that is sounding like boost creep. Does it drop back down to 10 or does it stay up there?

 

[luismaster7]

if i let go off the throttle it slowly goes back down to 10 psi. it only shoots up to 20 when i floor it. Its a 16g turbo

 

[LiquidX]

if i let go off the throttle it slowly goes back down to 10 psi. it only shoots up to 20 when i floor it. Its a 16g turbo

Any will drop down when you let off the throttle since you are no longer pushing the turbo. When you are WOT, does it spike to 20 and drop back to 10 or does it spike to 20 and stay there or go higher?


It does sound like you have boost creep which is highly common with 16g turbos due to their turbine housing design for the wastegate inlet.

The only way to cure that is by porting or just running at or above the psi that it's creeping to.

 

[luismaster7]

it slowly goes up to 20 and then it just stays there. I got a 10 psi spring installed cant i just buy a boost controller and set it to i dunno 16 psi lets say? or would i have to keep it at 20?

 

[LiquidX]

it slowly goes up to 20 and then it just stays there. I got a 10 psi spring installed cant i just buy a boost controller and set it to i dunno 16 psi lets say? or would i have to keep it at 20?

You already have a 10lb spring and it's not allowing you to run 10lbs. A boost controller will NOT fix that issue, it's happening because the wastegate isn't the least resistant pathway for the exhaust to exit. Instead, it's exiting through the turbine causing spool (your 20 psi).

Unless of course your spring is actually a 20 lb spring (did you verify yourself?).

 

[luismaster7]

well it only goes to 20 psi when i stomp it all the way. If i just drive it casually it'll stay around 10-12. and no i haven't verified it but the guy that sold it to me said it has the 10 psi spring installed.

Edit: do you think a radiator hose can handle the heat that the wastegate is giving off?

 

[Auto RS T]

Im running 20 psi right now with no boost controller. I have a bleeder type of setup. I bought the car like that and havent gotten around to installing a boost controller.

Can you explain this?

Do you mean there is an open vacuum tee off your wastegate line acting as a pressure bleed off increasing the boost?

 

[LiquidX]

well it only goes to 20 psi when i stomp it all the way. If i just drive it casually it'll stay around 10-12. and no i haven't verified it but the guy that sold it to me said it has the 10 psi spring installed.

Edit: do you think a radiator hose can handle the heat that the wastegate is giving off?

I'm only concerned when you are WOT. You need to verify the spring to make sure it is in fact a 10 psi spring and not a 20 psi spring. If it's a TiAL then you can go to their website and locate the spring colors for the wastegate in question. Otherwise you'll have to figure out the brand and go from there.

 

[luismaster7]

Can you explain this?

Do you mean there is an open vacuum tee off your wastegate line acting as a pressure bleed off increasing the boost?

Honestly the previous owner had explained it roughly to me and now im having trouble contacting him. But yeah thats what it has set up

Liquidx: yeah i guess i'll just do that tomorrow and let you guys know

Edit: so i confirmed the wastegate spring and it is indeed a 10psi one. These are some pics to show how the setup on my turbo is.
Also i updated my profile with the known upgrades.

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