Inliners International Forums General Discussion Engines 292 intake manifold vacum

Hello.
I like to know stock 292 intake manifold vacum on idle and on full throttle.I am lookin for suitable switch for 2004r lock up converter.

Should be 18-20 inches @ idle.
Full throttle,,, you should have 0 vacuum,unless there is a restriction in your intake or exhaust system.

MBHD

Thanks
I found these part from transmission center.

How do you feel,will this work ok with 4,11:1 rear end and 0,67 OD ratio (r200R4)Car is -50 fleetline chevy.

#71V. Universal adjustable vacuum switch for any application that may benefit with its use
Unlike the GM switch that has been available for years, this switch allows the vacuum trigger point to be adjusted between 1 and 6 inches of vacuum. This switch can also be wired-in to be normally open or closed. $43.0

Or is this better

#71V2. Also available in a 6 to 22 inch model. Cost $43.00

Or this one

#71. Vacuum switch to cut the power to the torque converter lock-up switch under medium to heavy throttle. This will feel like another gear on higher stall speed torque converters. Cost 49.00. (This is a normally open switch. It takes 7 inches or more of vacuum to lock the converter and 3 inches or less of vacuum to unlock the converter.)

4,11's should be fine,what height are your tires?

I do not know too much about those trannys,do they have a speed governor,that you can adjust when you want tranny to shift?
I know the 700R4's do.
My friend knows alot about those trannys(he owns a tranny/custom car fab shop) ,I could ask him if you need any further advise.

The 6-22 inch model would be better all around
general purpose driving, but if you try & race alot & do not want it to lock up too often,,, get the lower vacuum switch.

With a turbo application,you can get away with the converter locking up early,(like using the 1-6 model) the torque (from having a turbo) will just push through the gears.

MBHD

Tires are 29".
Shifting point is next story.
Now i like to plan converter unlockin under acceleration.
Car is still waiting for drive shaft and all wiring work.So thats why i dont have any ideas of vacum on intake plenum under acceleration.

Car is going to be on every day use on summer season so 6-22 sounds good.

Do anyone have numerical information of 292 max torque @???? rpm and how low can i go with rpm`s on normal street use.

Jani from North

I think max torque around 1800 RPM?
Or at the most 2000 RPM??
Don't know the number,ft lb of torque,someone else chime in.


MBHD