2 Port Wastegate Actuator

[84GNGary]

The vacuum side of the actuator is leaking badly through the shaft. The pressure side holds fine but the actuator doesn't start to move until 7 psi of pressure is applied to it with the vacuum side at atmospheric pressure. Will a 86/87 actuator mount and work properly on the stock turbo? Kirban's has one on sale now and I know it's only one port.

Thanks, Gary

 

[HotAirWH1]

You can't just bolt an '86/'87 wastegate actuator onto a 84/85 turbo without modifications. The bracket holes won’t align with the '85 housing, and the resulting rod angle and length will be off—leading to sticking, inconsistent boost, or poor wastegate control. To make it work, you’ll need to fabricate a custom bracket and likely adjust the rod length to ensure everything cycles smoothly.

 

[pacecarta]

i would just forget about it , cap that hose at the vac block , leave the port on wastegate open ..buick put two hoses thinking they needed it , one works fine

 

[84GNGary]

i would just forget about it , cap that hose at the vac block , leave the port on wastegate open ..buick put two hoses thinking they needed it , one works fine

I'll give it a try.

Thanks for the responses.

 

[Aaron1456]

Here's what I did to run the 86-87 actuator when I was running an internal wastegate, slotted the mounts a bit. It actually lined up pretty nicely. I was also using a manual boost controller so I can't say how well it plays with the stock boost control solenoid.

 

[pacecarta]

87 standard wastegate spring is 10-12 psi, thats the lowest you can possibly get it to control
if youve got race fuel e85 or alky have at it

with any wastegate you should connect the gate direct to a boost source and make sure the hose ends are good and tight
take it easy getting into throttle see what boost you get then determine if you need to increase it using the boost solenoid or manual boost control
keep in mind the adjustable end of the rod is not for increasing boost its for connecting the rod at the proper length to the puck arm
ideally there should be about 1/8" pull to slide onto the puck arm ,
adjusting tighter will make more boost but its at the cost of reduced overboost control due to limiting the puck movement