Daily-Driven big turbo MSP Build up

[TurfBurn]

shoot me your address (although I probably have it from your other orders) and I'll send you one of the spare MBC's I have laying around... they are of a different valve type than the JoeP so it may help out... worth a try at least...

 

[yellerandahalf]

update: t3 sucks my hairy butt! basically i got kinda ripped when i bought it, it's not really a super 60 and it's a hodgepodge of parts. not cool! So I'm getting a t3/t04E turbo, stage III. that should flow quite a bit better, and spool a little later, which will be nice. I hate building boost cruising around. t3/t4!!!!!!! wohooooo!!!!!!
-Mateo

 

[MPNick]

easiest way to figure out if your internal wg actuator is shot is blow into the signal line. you shouldn't be able to blow any air into the can. i know this because my actuator is dead...

If this is the case you would have full boost everytime it spooled up. Basicly no boost control at all. He remove the wastegate from the swing valve. This should build almost no because because it should stay opend. This is why I thing that it is stuck.

 

[MPNick]

I was hoping you wouldn't say that. balls. Looks like i need to port the wastegate. It's a t3 super 60, with the standard internal wastegate. I thought this wastegate was supposed to be good to 350bhp?
-Mateo

EDIT: isn't this wastegate bigger than the GT25R? and it doesn't have creep issues.

No way is your T-3 wastegate port to small. They handle alot of flow. My best guess is that it is stuck or just tight. It may have small shot stuck around the shaft of the swing valve. Most of the time they get blasted clean before rebuilding. We blast clean all of the time. It is just a shaft that moves in a very small bore. Sometime you will get the blast/shot/glass bead stuck in the bore. This will cuase the valve not to wsing open as fast as you need it to. Then the boost will creep. Try shoot it with brake clean and air as you rotate it. It may take more then a few times ti clean it out but it will come out.

 

[MPNick]

I thought this wastegate was supposed to be good to 350bhp?
-Mateo
EDIT:

More like over 400whp. You do not need to port it out.

 

[low_psi]

If this is the case you would have full boost everytime it spooled up. Basicly no boost control at all. He remove the wastegate from the swing valve. This should build almost no because because it should stay opend. This is why I thing that it is stuck.

I was unaware he disconnected the wastegate and was still overboosting.(dunno)

EDIT- Just saw the new thread.

 

[yellerandahalf]

it's definetly not stuck. it swings freely back and forth if you hold the wastegate at different angles. That's definetly not the problem. I think the problem honestly is the turbine wheel is so light that that's the least-restrictive path, and exhuast gas automatically takes that path. Plus, i completely removed the swinglvalve from the equation by holding it open permanently and it still built boost by 4500rpm.
-Mateo

 

[wicked]

it's definetly not stuck. it swings freely back and forth if you hold the wastegate at different angles. That's definetly not the problem. I think the problem honestly is the turbine wheel is so light that that's the least-restrictive path, and exhuast gas automatically takes that path. Plus, i completely removed the swinglvalve from the equation by holding it open permanently and it still built boost by 4500rpm.
-Mateo

are you runniing a wastegate line from the intake mani,or are you sourceing it from closer?

 

[MPNick]

it's definetly not stuck. it swings freely back and forth if you hold the wastegate at different angles. That's definetly not the problem. I think the problem honestly is the turbine wheel is so light that that's the least-restrictive path, and exhuast gas automatically takes that path. Plus, i completely removed the swinglvalve from the equation by holding it open permanently and it still built boost by 4500rpm.
-Mateo

Where is your boost line going to? Where are you checking boost?

 

[yellerandahalf]

it's run to directly at the compressor outlet. I'm checking boost at the manifold. The gauge has been checked, and is accurate to w/in .5psi.
-mateo

 

[Kooldino]

No way is your T-3 wastegate port to small. They handle alot of flow.

I gotta disagree with you here. I was getting boost creep earlier this year at around 15psi. I ported the wastegate with a dremel, and voila, no more boost creep.

 

[TurfBurn]

keep in mind that the exhaust can affect it too Dana, I don't know if you made any changes but exhaust paths can lead to creep behavior as well from time to time.

 

[MPNick]

I gotta disagree with you here. I was getting boost creep earlier this year at around 15psi. I ported the wastegate with a dremel, and voila, no more boost creep.

The 2.3 run 15psi stock from Ford. They sold them for over 10years. Boost creep was never a problem at all. We have 2.3s making over 350 whp with the stock wastegate and they are not having problems, over 420 whp with NOS. We run up to 30psi with the same wastegate port size. My guess that your problem was with your boost control or maybe the spring. Porting may have help you work around a problem. Maybe the your wastegate spring had to much preload on it.

He may have a crack in the exhaust housing that is by-pass the port some how. Still it should not cause his problems.

 

[yellerandahalf]

solution =
t3t4 57 trim. .68ar turbine. on the way.

 

[KzA]

lol I sure hope that fixes it...if it doesnt your going to be realllll pissed

 

[yellerandahalf]

shiiiit you're tellin me... I don't see how it couldn't though. We even went to far as to check if something in the manifold was blocking the path into the wastegate. and that's a negative.
-Mateo

 

[MPNick]

solution =
t3t4 57 trim. .68ar turbine. on the way.

How is this a fix?

 

[igdrasil]

what stage is your turbine wheel and a/r?

i suppose its standard

check the difference in stages, and other turbine wheels like the WRX and a T28:

 

[funktownp5]

solution =
t3t4 57 trim. .68ar turbine. on the way.

Whoa, thats going lag quite a bit, what are u reving to?

 

[Kooldino]

keep in mind that the exhaust can affect it too Dana, I don't know if you made any changes but exhaust paths can lead to creep behavior as well from time to time.

I was getting boost creep.
I took off the turbo.
I ported the internal WG.
I put the turbo back on.
I no longer got boost creep.

(ie, I didn't change a thing other than porting the WG)