SAUVIC Motorkhana Round 1- Saturday June 8th Winton Skidpan + Accommodation
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By joshuaho96 · Posted
Wastegate stuck open will make the exhaust louder because the turbine is being bypassed but it will not make a sucking noise. It will affect idle but not enough to cause issues. Only way for that to be an issue is if the wastegate actuator rod is so loose that exhaust is leaking out from it. Exhaust leaks are usually not that complicated to spot otherwise. Any leak will be magnified by exhaust visibly leaving soot or heat damage to gaskets, external surfaces of cracks, etc. Make sure the BOV is not stuck open. If this is running stock ECU/your tune is not speed density get rid of the atmospheric vent and do 100% recirculation. A boost leak test would show if you had a problem there. You can also try capping the throttle body and only pressurizing the intake manifold to see where pressure is leaking out. With the engine off the only path for it to leak out should be the intake valves. -
I will go over it again, a leak would make the most sense and also explain why I have a high idle issue if I plug the iacv in...I have had everything off, inspected, and replaced every coupler and hose in question, new clamps, reinstalled and basically soaked the entire system with soapy water and find nothing... could there possible be an issue with the wastegate rusted open?? from sitting so long? again the air sound literally sounds like a 3 inch open pipe blowing or sucking air, not just a small passage, very strange. it does sound like the turbo is creating massive air flow but like its not being diverted or flowing into the intake/cylinders, it seems to have very low and delayed power. do appreciate the help -
Boost leak or exhaust leak. Boost could be from anywhere, including manifold/plenum gaskets. Exhaust is frequently head to manifold gasket or from manifold to turbo gasket. Often caused by missing nuts or broken studs. -
Check for spacers on the front, in case they've been pushed out a little to try to match he rears better.
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By IXMandalorianXI · Posted
I should clarify that the previous owner put the wheels on, so Im not entirely sure what he bought. I was searching the Rota page and found these two as the only matches. It did not occur to me that perhaps they sell these wheels with different offsets. I guess the best way to solve this is to take the wheels off and measure them from the inside to be sure.
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