vacum presure

[Ä‘uro]

Can somebody tell me how big vacum presure should be on inlet manifold.
I measured nd it's 0.4 bar....
Is it to low or this is ok?

[PeteG40]

depends on your engine spec

0.4bar is low tho

[Ä‘uro]

nd how "big" should be on stock engine?

[PeteG40]

completely stock i get 0.5-0.6 bar depending on the engine/gauge etc

stock with flowed charger and 65mm pulley - 0.9-1.1 bar

stock with flowed charger and 65mm pulley and gt inlet - 0.8 bar ish.

[hayesey]

are we talking about max boost pressure or vacuum at idle here?

[Ä‘uro]

we are talking about vacum presure not boost presure..

[PeteG40]

oh yeah - er then -o.4 is probably right