Quote:
Originally Posted by KoukiMonsta
Huh? you talking bypass valve vs atmospheric BOV?
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I dislike to use the term "blow off valve" and I feel like a ricer if I type bov.
Keep a bypass on the hot side as close to the compressor as possible, recirculated back to the inlet pre-turbo, and m
ake sure it hangs open at idle, use the softest setting possible. A greddy type-S or HKS "Race" bypass are ideal and open easily at idle (just like OEM). This will prevent the compressor from buffeting the maf hot-wire around idle, and prevents the wandering A/F ratio that it causes. It also has other benefits, such as improved turbo "spool" (basically the compressor wheel starts off at a higher initial speed). Many turbos are now incorporating bypass valves directly ON the compressor, I can only guess it is because the manufacturers, knowing how important it is to have on so close to the compressor, after seeing many of their units fail because of improperly installed bypass valves (and the wrong type of bypass i.e. HKS SSQV which does NOT operate effectively near idle speeds) finally decided to just give the correct unit, in the correct place (on the hot-side as close to the compressor as possible) directly to the customer, with the turbo.