kissifur

Hello, I have precision 6766 turbo 1,32 ar t4 divided in a b18c4 85mm bore with top mount manifold, but with my wastegates fuly closed I can't make more than 40 psi of boost, anybody make more boost on same engine with same turbo? Is journal bearing turbo.



Thanks in advance

Garage 808 Hatch

Do you know your Density Altitude? By full closed WGs do you mean you completely unplugged them? Or just turned whatever boost control you have all the way up?

kissifur

i run 14 psi spring wastegates, and when i say fully closed its because i have 100% closed in duty cycle boost controler in s300. Any advice for make more pressure?

j-bird20

14psi in EACH gate?

SPOOLINmatt

I have 84.5mm 11:1 b series, same turbo, 9psi in each gate. Made 42-44 without maxing the settings

kissifur

14 psi on each gate yes, if you make 42-44 psi i dont what is wrong in my setup, how do you mount your boost controler?

SPOOLINmatt

First off, what solenoid are you using? what controller?

Garage 808 Hatch

boost leaks?

pgpbubble

Run 2 MAC valves or run a 4 port MAC valve

kissifur

I run one mac valve, only, why run 2 mac valves?

kissifur

I see, is like this right https://honda-tech.com/forums/drag-racing-36/how-do-i-plumb-wire-dual-mac-valves-boost-control-3151864/

Mo_Spec

Up here in the damn mile high city we have same issue. 6765 1.32 a/r turbine housing mac solenoid with co2.

Car only makes 35-36 psi max up here. We are using the T1 wastegate sensor so i know the gate is shut all the way. The air up here is just so shitty it maxs out much earlier.

When we go to races where the DA is tons lower (ours is usually 8000+) the car makes 40+psi easy.

Anyway long story short the DA could be douching you...