2560r overboost. what can i do ? possible porting FM outlet could help ? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-08-2015, 06:25 AM   #1
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Default 2560r overboost. what can i do ? possible porting FM outlet could help ?

95 1.8
gt2560r
Fm turbo outlet and FM downpipe
2.5" catless exhaust
7psi wastegate can
IWG has been ported, channel was made to the port and the port enlarged


My car will not keep boost levels near wastegate pressure. it seems to like to run around 10psi, I disconnected the wastegate from the flapper and did a 3rd gear pull and still could reach 10psi close to redline.

im wonder if taking out the divider in the FM Turbo Outlet could help add some turbulence and slow the turbine wheel down ?????



I also plan to open up the port under the flapper a little more without removing the turbo from the manifold/car
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