GTM Stage 2 Internal Wastegate Actuators

ColdFire · 12-04-2013, 03:28 AM

We are trying to install a used twin turbo kit stage 2 and I've been told by Mike that they usually supply 9 psi springs for the stage 2.

As our car is automatic and there is existing issues with the tranny, we wanted to have 6-7 actuators for the kit and then we have the option increase our baseline psi by boost controller.

Any idea where i can source the HKS Internal Wastegate actuators for the Stage 2 with GT28RS 0.86 ?

SharpByCoop · 12-04-2013, 07:51 AM

I'm not sure you need to purchase anything. You have what appears to be exactly the same setup I had, and we used a manual boost controller to raise boost to 17 lbs.

For me, we found the electronic boost controller unnecessarily complicated. For me.

Coop

Alstann · 12-04-2013, 08:07 AM

Quote:

Originally Posted by SharpByCoop

I'm not sure you need to purchase anything. You have what appears to be exactly the same setup I had, and we used a manual boost controller to raise boost to 17 lbs.

For me, we found the electronic boost controller unnecessarily complicated. For me.

Coop

He wants the lower psi springs so he can just simply run wastegate pressure if need be. The spring determines the lowest boost level the turbo will go to.

If you wanna ball out, 4-port boost solenoid with a "0" psi spring so you can run whatever boost you want.

esfourteen · 12-04-2013, 09:41 AM

Quote:

Originally Posted by ColdFire

We are trying to install a used twin turbo kit stage 2 and I've been told by Mike that they usually supply 9 psi springs for the stage 2.

As our car is automatic and there is existing issues with the tranny, we wanted to have 6-7 actuators for the kit and then we have the option increase our baseline psi by boost controller.

Any idea where i can source the HKS Internal Wastegate actuators for the Stage 2 with GT28RS 0.86 ?

the wastegate actuator arms should be adjustable, by adjusting the rod length you are setting preload on the spring. I specifically set mine to 9psi, but originally I had them at 7.

Nixlimited · 12-04-2013, 09:42 AM

Quote:

Originally Posted by Alstann

He wants the lower psi springs so he can just simply run wastegate pressure if need be. The spring determines the lowest boost level the turbo will go to.

If you wanna ball out, 4-port boost solenoid with a "0" psi spring so you can run whatever boost you want.

Spring is advisable to help with boost onset. It's always been my practice to have a spring PSI as close to my target boost as I can get without overshooting the mark in all conditions. Let the EBC or MBC take care of the rest as well as the boost limiting function.

esfourteen · 12-04-2013, 09:57 AM

Quote:

Originally Posted by Alstann

He wants the lower psi springs so he can just simply run wastegate pressure if need be. The spring determines the lowest boost level the turbo will go to.

If you wanna ball out, 4-port boost solenoid with a "0" psi spring so you can run whatever boost you want.

4 ports are only useful if you have external wastegates with top/bottom ports and an ECU that can control the solenoid properly, completely unnecessary unless you want to run very low AND very high amounts of boost.

Alstann · 12-04-2013, 11:30 AM

Quote:

Originally Posted by esfourteen

4 ports are only useful if you have external wastegates with top/bottom ports and an ECU that can control the solenoid properly, completely unnecessary unless you want to run very low AND very high amounts of boost.

Oh I know. It's more of a "baller status" item if anything. Especially since on our stock motors, the psi range is very small.

12-04-2013, 03:28 AM	#1 (permalink)
ColdFire Base Member Join Date: Dec 2012 Location: Qatar Age: 34 Posts: 106 Drives: 13 370Z 6MT, 15 GT-R Rep Power: 368	GTM Stage 2 Internal Wastegate Actuators We are trying to install a used twin turbo kit stage 2 and I've been told by Mike that they usually supply 9 psi springs for the stage 2. As our car is automatic and there is existing issues with the tranny, we wanted to have 6-7 actuators for the kit and then we have the option increase our baseline psi by boost controller. Any idea where i can source the HKS Internal Wastegate actuators for the Stage 2 with GT28RS 0.86 ? __________________ ColdFire's Build Journal Amuse \| Vossen CV3 \| KW V3 & More ; )

12-04-2013, 07:51 AM	#2 (permalink)
SharpByCoop Enthusiast Member Join Date: Sep 2010 Location: Connecticut Posts: 286 Drives: '08 G37S - Graphite Rep Power: 14	I'm not sure you need to purchase anything. You have what appears to be exactly the same setup I had, and we used a manual boost controller to raise boost to 17 lbs. For me, we found the electronic boost controller unnecessarily complicated. For me. Coop __________________ Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost)

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