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Post by boostedbird on Feb 8, 2024 18:50:43 GMT -5
I’m using one of your stage 2 manual boost controls and when doing some Dyno pulls the car was experiencing boost creep. Would it be better to use the OEM boost control solenoid with the Megasquirt to control boost? And if so do I need to install the corresponding jumper or can I simply enable the setting in TunerStudio?
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Post by Stinger on Feb 8, 2024 23:35:26 GMT -5
Creep is not something typically related to the boost controller. That's a lack of flow in the wastegate circuit (can't bleed off as much exhaust as it needs to in order to hold boost where it should be).
What turbo, wastegate, manifold/header, etc.?
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Post by boostedbird on Feb 9, 2024 3:45:59 GMT -5
I’m using a MaXPeedingrods t3/t4 turbo w/internal wastegate and a stock E6 manifold
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Post by Stinger on Feb 10, 2024 0:40:59 GMT -5
Did you happen to see how the size of the internal gate hole compared to the size of the wastegate flapper diameter? I'm guessing it's significantly smaller and could be ported out to increase flow.
The other thing to check, is if you're running one of the offshore 5 bolt to v-band outlet adapters, they don't let the gate open very far. I tend to grind and drill on the adapter to increase how far they open.
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Post by boostedbird on Feb 10, 2024 4:58:21 GMT -5
I will look at the turbo when I take it off and compare the flapper to the flapper hole. I’m also using a Stinger 5 bolt 3” down elbow that the wastegate attaches to so I know the flap has room to open, but I’ll check the hole it covers for size comparison and if it’s smaller I’ll port it out (or have it ported out).
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Post by Stinger on Feb 10, 2024 16:35:47 GMT -5
Easy way to check size and also to make sure you don't port in the wrong spot that doesn't line up with the flapper is to put some white lithium grease on the flapper and then close it against the turbo when it's bolted on. Then make sure you port at least 1/8" inside of that grease circle.
Be sure to put a rag in the exhaust inlet of the turbo to keep metal chips out, and tape over the exhaust outlet for the same reason.
When porting the hole, you can also round off the edge nearest the 4-bolt flange in the inlet to help exhaust get into the wastegate hole (instead of having to turn around a 90 degree edge, a rounded edge helps it flow into the gate).
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