+1

Also, is there an intent on APS's part to release the TT kit with a 15 psi standard boost application in the future, or is that just something we will have to take up with a tuner?

 

I appologized above for my comment, I totally missed your answers in that thread. Its just really frustrating to wait on a car for as long as I have and then find out the week before the turbo goes on that there may be some fairly major changes that may need to be made. I remember this being brought up a few months ago and I guess I never read the resolution, which would make it my fault. I guess I had thought I subscribed to that thread, in which I didn't. So, once again I am sorry! It looks like I will be shopping for some new actuators this weekend.

I'm planning on running an 8.5:1 compression on 93 octane, what poundage actuator would you recomend? I am having the APS exhaust installed, as well as cams. Also, I want to leave the door to race gas open, in case I ever decide to drop some 110 octane in!

Thank you,

 

Peter,
Maybe if you could find us a source for the actuators that you would recommend......because Garrett does not like to deal with the public directly. Some of us have sent e-mails to Garrett to get the info on a recommended part# with no luck.

 

I too would like to know where I can find the proper actuaters. My goal would be to run about 10 psi - with a high flowing exhaust system - on just the actuators, and then be able to run more boost (16-18 psi) with a boost controller. I assume this is realistic?

Chris

 

i am new to this but maybe because of the internal wastegate correct me if im wrong.

 

This is not relevant to the wastegate design - it's the wastegate pressure actuator that controls the boost pressure.

Peter

 

I'll get back you guys in a day or so, in the interim I will look through all of the available Garrett actuator part numbers and then provide you guys with some options for higher poundage boost control actuators.

Thanks

Peter

 

Excellent Peter...that's what we need.....feedback from the guys who designed the system.....someone who knows what will work for our hp goals.....thank you,thank you,thank you!!!

 

Sharif the APS twin turbo system was always designed by our engineers to operate at approximately 8 to 8.5 PSI - out of the box.

The stock APS fuel system supplied in the APS twin turbo system was designed to allow sufficient head room to support up to approx 12 PSI boost without any futher need to upgrade the APS fuel system.

Sharif sourcing higher poundage boost control actuators should be easy in the US and Forge do have a good range of high poundage Gasoline turbo control actuators, this brand of boost control actuator I recommend to our US based customers.

The bigger issue of course is building/finding a fuel system large enough to support more than 12 PSI turbo pressure, (the stock APS fuel system will support 11 to 12 PSI without problem) obviously it's not just a matter of winding up the turbo boost pressure - the guys will need a serious fuel system to support that amount of mass air flow.

APS will in the future release the APS big fuel system for this exact purpose - that is to support the original APS twin turbo fuel system and to provide a total fuel system solution to support very serious Horsepower, I will post more details on this fuel system in the very near future.

Thanks

Peter

 

Charles the stock APS/Garrett turbo boost control actuators with the solenoid mapped will provide approx 12 PSI with APS test pipes and an APS low restriction true dual exhaust system - APS has completed a good number of Z cars with this combination and 12 PSI turbo pressure is easy to achieve.

Thanks

Peter

 

I can't say for sure though there's a high possibility that APS will supply higher poundage boost control actuators in the APS big fuel system package.

I'm starting to get scared by guys talking about running high boost pressure (much greater mass air flow) without a thoroughly engineered fuel system to support the high horsepower.

Peter

 

Well thats fantastic and all, but this engine is fully built with cams and using different brand test pipes and exhaust and its pretty sad only being able to run 9-9.5 psi. There is nothing your solenoid mapping will do... even with the wastegate vacuum/pressure reference lines completely disconnected there is no more boost to be had, the springs are simply too soft to hold any more exhaust pressure or your actuator arms were out of spec when shipped. There is no possible way at 455rwhp we are outflowing the capabilies of the exhaust and test pipes, as the same exhaust setup on my car is holding much more power/exhaust flow.

While I am happy that APS has been able to hit 12 psi on so many cars, there are many others that are not able to...when something is being run on the ragged edge it will perform inconsistently... so its no wonder different setup cars are hitting different maximum boost pressures.

please set us all up with a source and part # for the actuators you recommend for those wanting to your use turbo kit to the previously preached HP potential.

Thanks

Charles

 

No problem at all and if you need any help or advice you're always welcome to pm or email myself.

Well the answer to that depends on how much boost you intend running and if you have a large enough fuel supply to support the boost pressure/mass air flow.

If you utilise APS test pipes and the APS true dual exhaust system you will be able to control boost pressure to approximately 12 PSI via the Unichip boost control solenoid/computer - obviously you would need to have the computer mapped by a really competent dyno tuner to ensure safe engine operation, would be worth chatting to Tuan at GRD in Chicago.

Thanks

Peter

 

I suspect then that the test pipes and or exhaust you're using has a major restriction if that's the case.

Well if you're having a problem (not getting sufficient boost pressure) Charles by all means install higher poundage actuators - this will solve the issue.

You'd be best to conatct Forge in Florida as this will be the most cost effective way for US customers to source higher poundage turbo boost control actuators.

Thanks

Peter

 

deleted.

 

Does this happen to be my old engine? Im glad that its finally getting done. Hey when its done take me for a ride. I wanna know what real power feels like. ...

 

Is Forge in Fort Myers?

 

What part would we need to get from Forge? I am not sure what kind of turbos are part of the kit, so therefore, it's going to be difficult for me to order the correct part. Are there any tricks to the installation of the actuator?

Thanks

Chirs

 

Yes it's your old engine. It's been a long expensive process. Hopefully we've done all our homework upfront and the install and tune will be "uneventfull".
If APS had the big fuel system available now, I'd also be installing that as well. Rob is gonna need to do the intitial break in and safety tune, I hope he goes easy on my new tires, those 295-PS2 are expensive

 

They look like standard "T2" type actuators. I think a good "trick" is to adjust the actuators with a pump , on a bench outta the car first. Since the control rods are bent , they can't be adjusted in-place, they need one end disconnnected.