Quote:
Originally Posted by spooled240
This is a common problem on larger internally gated t25/t28's. The problem is the larger compressor wheel and turbine wheel with the small back housing and internal wastegate. There is a lack of flow through the wastegate. Some options would be:
-port the wastegate
-run a larger .86 back housing
-go external wastegate
-introduce some restriction on the exhaust
My suggestion is to go external by modding the manifold or getting a "t25 plus" housing
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To you and the guy below I have a buddy running the hks wastegate around 14psi making around 300 which I?m down with, I don?t need a ton of power. I do have a s15 wastegate which should be around 8psi would that solve the issue or should I just buy the hks? And thank you both for the input 👊🏻
Another option is head gasket studs bigger injectors and E85 lol but I want to actually drive this build for a bit