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Title: vacum presure
Post by: Ä‘uro on May 12, 2009, 12:44:35 PM

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?

Title: Re: vacum presure
Post by: PeteG40 on May 12, 2009, 01:50:02 PM

depends on your engine spec

0.4bar is low tho

Title: Re: vacum presure
Post by: Ä‘uro on May 13, 2009, 08:16:05 AM

nd how "big" should be on stock engine?

Title: Re: vacum presure
Post by: PeteG40 on May 13, 2009, 08:26:40 AM

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.

Title: Re: vacum presure
Post by: hayesey on May 13, 2009, 09:19:13 AM

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

Title: Re: vacum presure
Post by: Ä‘uro on May 14, 2009, 07:41:06 AM

we are talking about vacum presure not boost presure..

Title: Re: vacum presure
Post by: PeteG40 on May 14, 2009, 08:02:38 AM

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

Club G40 Forum

Club G40 => General Car Chat => Topic started by: Ä‘uro on May 12, 2009, 12:44:35 PM