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Discussion Starter · #1 ·
Hi there,

The mods to my EVO 4 are as follows:

HKS air filter
Blitz BOV
Full 3 custom exhaust with Apexi N1 muffler
and others (but not performance related)

Anyway, I plan to install the GReddy Profec B boost controller.

There are two settings, low and high boost. To anyone who has increased boost on their car with similar mods, what settings for low and high boost do you use? I've heard that 1.2 - 1.3 bar is OK as for say a maximum boost setting? Anything higher than that may result in too high temperatures, possible detonation...etc? Can anyone advise?

Also, I would like to put the car on a dyno after the higher boost has been set up. Can anyone give me a rough estimate of the HP at the wheels/engine?

Thanks in advance.
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