Non return valves - Alfa Romeo Forum
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(Post Link) post #1 of 6 Old 12-04-16 Thread Starter
Status: Working Hard On 156 Veloce 3.0 Turbo Project
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Non return valves

Hi All

3.0 24 Engine

On the plenum the 2 pipes coming off it , I guess they both are made to work from vacuum.
This being the case and having a turbo will be ok for me to fit non return valves so the the turbo pressure does not blow down them .

Any info will be good

thanks in advance
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you could also just use a catch tank, and vent to atmosphere.....
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You realy dont want the brake booster vacuum vented to atmo... non return valves sound smart.
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There already is nonreturn valve on brake booster.
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(Post Link) post #5 of 6 Old 13-04-16 Thread Starter
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Quote:
Originally Posted by yan.ko View Post
There already is nonreturn valve on brake booster.
Thanks Yan.Ko
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Quote:
Originally Posted by yan.ko View Post
There already is nonreturn valve on brake booster.
Yup - this ^^^ have not had or heard of problems with OEM setup and added boost.

One way valve and vacuum accumulator is needed when you go very aggressive on cam overlap. That causes that there is no proper vacuum on idle, only when you close the throttle from higher up revs. In that case you want to store vacuum for brake assist at the traffic lights or crawling along for a bit
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