L30 / L31 "base engine friction torque vs rpm vs vacuum" table

[1project2many]

So I looked it up, here you go.

Thanks.
Those tables match the ones I have here. I wonder if they're consistent across all L30 / 31 equipped trucks.

As piston surface area increases so do the pumping losses. These losses become higher and higher as the vacuum increases and the piston has to fight increased resistance.

Agreed. With so many similarities between engines it should be fairly easy to see this occurring by comparing tables but the comparison tells a different tale:

Vortec_Friction_Torque.jpg

[Hog]

An L31 should be similar to an LT1, but I cant find those tables in any LT1 calibration.

peace
Hog

[1project2many]

I expect they're part of the torque calculation for torque management. I don't remember seeing engine torque as an active variable in the LT1 calibrations. It may be part of the 4.3 calibrations so I'll check a few of them out.

[Fast355]

I expect they're part of the torque calculation for torque management. I don't remember seeing engine torque as an active variable in the LT1 calibrations. It may be part of the 4.3 calibrations so I'll check a few of them out.

IIRC there are several torque calibration tables in the 0411. One for the A/C, one for the accessories and an engine.

[1project2many]

Interesting. The tables above are form the 98 black box. I'll have to see if there are other tables to view.

[Hog]

Interesting. The tables above are form the 98 black box. I'll have to see if there are other tables to view.

Which are the same as the 1996 blackbox tables I posted.

peace
Hog

[1project2many]

Good to know. Thanks.