17 psi Wastegate Actuator & NO boost controller?

[miden]

So I'm planning my future mods for the days when I have more money than sense. I'm not looking for a 400 whp monster; just an above average, reliable street machine. I'm thinking about a FP big 28, exhaust, intake, the usual monitoring tools, fuel managment, clutch, etc, etc, etc...

My question is that if I'm not looking for a super high power ride and I decide that 17 psi. is good, will the FP 17 lb. WGA and no boost controller give me 17 lbs. or boost after the spike? I figure it should but want second opinions...

thanks y'all...

-M

 

[14.5 drift]

Yes if my thinking is right, I am sort of learning all this type of stuff too. A boost controller is a vein that relieves pressure from the wastegate allowing it to stay shut longer or build more boost. Correct me if I'm wrong here guys...

 

[dsmayhem]

400 WHP on a T28 is probably going to be tuff to do.

You could probably do that with the WGA, but why spend $100 on an actuator when you could do the same thing with a $50 manual boost controller.

 

[14.5 drift]

doesn't it come factory equipped with a 17 lbs spring?

 

[neuro]

Yes if my thinking is right, I am sort of learning all this type of stuff too. A boost controller is a vein that relieves pressure from the wastegate allowing it to stay shut longer or build more boost. Correct me if I'm wrong here guys...

That's about right. I've figured out that on my Profec B-spec II that the Set % just sets the duty cycle of the Profec's solenoid where 0% bleeds off no air (thereby causing the actuator to open at it's usual 9lbs) and 100% bleeds off as much air as it can from the actuator line, which more or less approximates the action of an MBC. On my 9lb 14b actuator, 40% nets me about 16 lbs of boost.

On a 17lb actuator, even with a boost controller, you can never set the base boost below 17lbs...period. That means you'll need fuel enrichment BEFORE you install the turbo. For a car that's not going to be a 400HP monster, I'd suggest using a lower pressure actuator and a boost controller.

Most diaphragm based actuators will start opening the gate slowly somewhere before the actual boost fully overcomes the spring pressure that's holding it closed, whereas a good boost controller will keep the pressure off the diaphragm until the point you set, then slam it open quickly allowing boost to build up faster.

 

[dsmayhem]

Nope I want to say its 10-12.

 

[neuro]

doesn't it come factory equipped with a 17 lbs spring?

I believe I read the stock actuator is 10lbs and 17lbs is the optional actuator from FP.

 

[Pj97GST]

doesn't it come factory equipped with a 17 lbs spring?

I second the motion of getting a good manual boost controller. Last I checked the FP 28 had a 14lb actuator.. Honestly, with decent tuning and the right mods, you can probably eake out 300 and change on the 28.. It's actually a pretty good turbbo for those that want one that is stock appearing. (It's also great for those that plan on running in stock appearing class at the shootout)

 

[neuro]

FP's site actually says it's 11lbs

http://linux.forcedperformance.net/...&Product_Code=WAT28DSM17psi&Category_Code=DSM

 

[Pj97GST]

Damn,, Guess that I should check FP's site more often. I stand corrected. Thanks