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  Soarer Central * Mechanical - V8 * 1UZ Manifold Vacuum, inhg - sealevel, 20-25 degrees C? Previous Previous    Next Next  

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Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5713
Reg: 11-2005

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 Friday, April 19, 2013 - 05:38 am, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
G'day lads.

What would a stock inhg figure for a healthy 1UZ-FE be under vacuum for the following conditions:

Cold warm up (out of gear, auto)

Normal operating temperature (out of gear, auto)

Normal operating temperature in 'D' drive stationary?

Any help would be great.

I've had a search around and seems 19-22 is about right?
Paul Drane
Goo Roo
QLD
V8 Limited

Posts: 1272
Reg: 07-2005

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 Friday, April 19, 2013 - 02:16 pm, by:  Paul Drane (Paulwd) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
mine runs at about 24 inches at idle. and 12 lbs under boost, hahaha.
Mike Beck
Goo Roo
New Zealand
BMW E36 Coupe 1UZFE V8 340i

Posts: 5715
Reg: 11-2005

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 Friday, April 19, 2013 - 04:13 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
Thanks Paul.

Is that 24 inhg at idle in or out of gear?

I noticed a fair difference with vacuum in and out of gear on my setup, out of gear idle with my GM 1 Bar maps sensor I got 0.50 - 0.60 v (apparently around 26 in on the GM spec sheet) and in gear 1.3-1.4 volts (about 22 in fromt he GM specs)

I might just get a vacuum gauge tomorrow to be more precise, I need it to help setup a gearbox controller off a MAP signal to read right instead using the TPS for shift points etc.
Paul Drane
Goo Roo
QLD
V8 Limited

Posts: 1273
Reg: 07-2005

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 Saturday, April 20, 2013 - 03:21 am, by:  Paul Drane (Paulwd) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)
I just use my gauge, but mine seems to be constant at idle in or out of gear, cold or at running temp.

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