I think thats about what cost is on the HKS actuators.

 

Has there even been an efficiency map posted for these turbos?

 

4 weeks eh?

Thats great considering my motor will be done by this Friday and ready to put back in. I guess I'll be running my 8.6:1 compression motor at 12psi and be dissapointed with the performance of the APS system I was told (with upgraded fuel system and tuning) would net me 600whp.

 

I hope you don't have to take the turbos off to install these actuators. I thought I read that somewhere but can't recall. Maybe not, but it would be easier to change them if the turbo were out do to the limited space down there. Either way more labor charges

 

yeah, from what I've read since they use a bent arm actuator you can't change them while they are on the car. Or, maybe that was adjust them... I'm so confused by now that I don't know what I know!

 

It's a turbo that is custom (GT28/35R) so no. I think APS has them and Garrett does not want them released, or APS doesn't want to release them. Not sure why, but that's what the story is. (talking about compressor map)

 

When an APS Z was up on the lift , my shop checked it out upon my request. It appears that you really need to remove the snail in order to change out both actuators. I'm definately upgrading them "before" my install.

 

Who'd you talk with at Forge?
Are they gonna size up the actuator arms as well?

 

This is pretty pointless to do... The actuators are not at fault, they are driven by a spring inside it. My PE's actuator springs were just under $20, it is just plain silly to go out and change the entire actuators, unless for some reason they are not upgradebale...which i do not see being the case (the WERE put together at some point....).

And, yes, you will most likely have to take off the turbos to change the actuator springs...but it's not that bad..it's not like swappign out the manifolds.

 

We'll be sending off a set of actuators to Forgemotorsport this week. Our plan is to stock upgraded actuators for those that want to run more than 12psi. More in will be available next week.

Tuan

 

Tuan,

What is your take on changing out the actutators once the turbos are mounted? I think at this point I will just have the shop put the car together how it is, then run my 8.6:1 forged motor with a whopping 12psi of boost. I will then take the car to Chicago to have it tuned, and have the higher pressure actuators installed. How does this sound to everyone?

 

You can't just change out the actuator springs because the actuators are pressed together and don't come apart. That's the point of geting the aftermarket actuators because you can adjust them and change the springs....

Thanks for stepping up and supplying the actuators Tuan, I assume they gave you the same 4 week turn around time frame? What boost range are you going to get for your car?

Thanks

Chris

 

The discussion has to do with APS systems not PE systems.The actuator cans supplied by APS are "sealed" you can not just change the springs. There is a little adjustment range on the rod turnbuckle but not enough to add over 3 psi of base pressure. The actuators need to be replaced if one wants a base boost of >~10psi.

 

oops sorry, I basically replicated your reponse. Same page though.
Don't want to seem like I'm ganging up on Gurgen. This is an issue I am very familiar with, since my APS turbos are torn apart right now getting hot part cermamic coated and I need an actuator resolution within the month fro re-assembly before LB and ssytem install.

 

Personally , if you can , I'd wait a few weeks, get the correct base actuators and save youself some labor $. That is my plan, since I am at about the same point in my install. Heck it has taken me a year to gather all the parts and build the LB, I can wait a few more weeks.

Patience , patience I say ...as my throttle foot twitches

 

Im looking forward to hearing your car up and running. You sure have spent a good amount of time here on the boards helping others and asking good questions.

 

Thanx , I'll find out if the old saying, measure twice , cut once pays off.

 

OK...my bad... it was told that they can in fact be taken apart, like PE turbos. to bad... I'm sorry, i have beed asked this before from others, just wanted to be sure to express what we found..

Good luck..

 

Any updates on this? Part numbers? More information what so ever?