Ttva angle and governor pressure

[06megatuned]

Can anyone explain what the TTVA and governor pressure does? Before I play with them I want a better understanding. I've scoured google and can't find a good explanation. Thank you

[2007 5.9]

Gov Press and TTVA are opposing forces on the shift valves. Once gov press overcomes TTVA then a shift happens...

[06megatuned]

So do you adjust them both up at the same time or just one?

[2007 5.9]

Depends on your valvebody and what your trying to accomplish.

[06megatuned]

Ats towing valve body. I want to get rid of shuttle shifting, and I want firmer shifts.

[2007 5.9]

Shift firmness is controlled solely by the VB. Can't adjust it directly.

For shuttle shift, try adding 5% TTVA.

[06megatuned]

Great, what does it do if I bump up governor pressures?

[2007 5.9]

By adding ttva to existing gov press, it'll delay your shifts. If you add gov press while adding ttva you may not accomplish anything useful.

[06megatuned]

Okay, this makes sense. Thank you!

[2007 5.9]

Best bet is to build a csp-5 tune and have each tune with a different ttva setting so you can test 4-different ones instead of flashing in 4-different files.

Csp makes testing theories or ideas MUCH nicer.

[06megatuned]

Okay, I'll do that right now.

[garrettg.bpd]

Dose the ttva position actual pid read actual position or dose it work at all?

[garrettg.bpd]

Has anyone checked this pid?

[2007 5.9]

Yes it reads actual TTVA angle.

[garrettg.bpd]

Take a look at this log.17096

[2007 5.9]

I see it top out at 45*...the ramp rate looked normal.

Was I supposed to see anything irregular?

[garrettg.bpd]

My ttva position actual is inop. Commanded works fine but actual is at zero.
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