recompile

iTrader: (38)

So, I just removed my FP Red setup w/ 20psi Forge WGA and installed my PT6262 w/ 44mm Tial WG w/ 20psi spring.

I have the vac lines setup the same way as before, which include a #65 pill before the T to the WG/Solenoid.

On the Forge, 0% WGDC would reduce me to wastegate pressure, 20psi.

On the Tial, 0% WGDC raises me from 20psi to 30psi !

I ran the vac line directly to the WG to make sure it's opening normally at 20psi, and it is. I triple checked WGDC in both ROM and datalogs, and in both cases it's 0%. I'm using Tephra v7, and I lowered the "100% WGDC Under This Load" to 10 Load, so the solenoid is basically never actuating.

So my question is... is my #65 pill to blame? Is this just too restrictive of a pill to allow the Tial to operate at base pressure even with 0% DC ?

Thanks, in advance.

recompile

iTrader: (38)

Through process of elimination I answered my own question. #65 is too small to be used with a TiAL 44mm WG and 20psi spring. The pill makes 0% WGDC = 30psi

Time to make a new pill I s'pose!

recompile

iTrader: (38)

And just to close the loop on this one in case anyone's curious.

A 1.2mm pill (3/64") solved my problem. Now 0% = 20psi and 70% = 34psi.

Fourdoor

iTrader: (11)

I would not have been able to give you a solution, but I knew the cause when I read your first post (just read it now, not earlier and keeping secrets ) The forge WG actuator (I use one as well on my Ralliart) is set up to give aprox 20 psi of boost in conjunction with the stock boost control setup that is zeroed out, without tweaking the ROM to get the boost you want I suspect that the ECU steps in to limit over boosting... I don't know because I never tried to use it without someone tweaking the ECU. They know what car it is going on, and set it up accordingly.

On the other hand, the Tial WG (I had a 38mm Tial on my Red EVO VIII RS) is set up so spring pressure is accurate with an un-restricted boost source connected directly to the actuation nipple. They have no clue what car it is going on, so it is configured for a "direct" boost source.

A hack job option instead of changing boost pills would have been to go with a lighter spring in the Tial... they have a HUGE range of optional springs you can purchase. The problem with a lighter spring is that when you reach boost pressure aprox 2.5x spring pressure (depending on the A/R of your turbine housing) the wastegate starts to open just from the exhaust pressure on the valve. Your solution was the better choice by far

Later,

Keith