vt ss 5 litre auto force motor vs tps????

[vnsswithcam]

hi guys just wondering has anyone changed the force motor specs in a tune to higher than 90 psi ???? if so what does it actually do? like if i changed the 100% tps section from 90 to 100 psi would it hurt the auto in any way??

[Holden202T]

there is a scalar that specifies the max pressure and its 90psi, so anything above 90 will get ignored .... but i haven't seen what happens if you change the max scalar aswell ....

from what i've heard its not a good idea, but i don't know if thats just for a standard box, if you get one rebuilt with better parts in it you may be able to go more without having issues.

one thing i can tell you, if you change the pressure to 90 psi at 0 kms its REAAAALLLY harsh

[VX L67 Getrag]

LMAO @ change to 90psi at 0kmh is harsh! I can imagine!

I've actually sent some tunes to be tested on stock auto's & had that max scalar changed to 125 psi from 90 & stiffened up a lot of the other tables & actually makes the stock transmissions last longer if driven harsh & under load constantly!

I've also been told too though that there is a valve or solenoid that won't allow more than 90 psi even if you do up that max scalar!

[Jayme]

yeah in the gbox there is a little hex nut that you can wind up manually to increase the overall pressure, ive got mates that wind them up 1/4 turn at time till it feels nice and firm. ive never tried to increase the max pressure scalar to see wat happens.

[vnsswithcam]

thanks guys for reply where would i find the scalar? also being a maf based tune not map to increase fuel abit would i adjust the injector rate constant vs mgc vs rpm ? is that the ve ? like in map based tunes? if so how much should i increase it at a time i just dont want to lean it out or flood the motor too much i was thinking like .030 at a time until i get desired afr im after is that too much or too less? im still learning maf based tunes any help?

[VX L67 Getrag]

Where is the tune your using? I'll look for the max scalar!

With the fuel side of things I wouldn't personally do it blind! either do it off the stft's or the wideband is even better!