Killing Wastegate Creep
 

this is a very intresting read

http://autospeed.drive.com.au/cms/A_1053/article.html

Where can i purchase one of these gizmo's? what is the Proper name of this device?

Re: Killing Wastegate Creep
 

im thinking of trying that... just for shits and wiggles :-*

Re: Killing Wastegate Creep
 

A ball and spring adjusted to the point before the stock actuator setting would work better and be safer.

Re: Killing Wastegate Creep
 

Neat idea, but mostly ineffective. He should have shown different responses for each gear. He is adding a time delay response to a system which makes it unpredictable in each gear because of loading.

He talks about the effect of "spinning the tires" after a shift. If that is what he is after, then just make the system slightly underdamped to give a slight boost spike. Then he'll achieve good response and a good bit of "tire spinning" fun.



Agreed.

Re: Killing Wastegate Creep
 

Can You Elaborate? or is that Link BS?

Re: Killing Wastegate Creep
 

This so called "fix" is adding some delay for the pressure to reach the wastegate actuator and prevent it from opening early which usually happens with internal wastegates.
He did this by adding 2 meters of tubing and a 10cm x 2" container in between.
The problem is boost spikes and response of the wastegate. Plus it's going to be a small diameter for the flapper.
His graphs are deceiving because it doesn't apply to all gears.
Keeping the wastegate line short and using a ball and spring will work so much better.

Re: Killing Wastegate Creep
 

In addition to what whiterice said, he also is not showing other response scenarios as well besides every gear.


Also needed is acceleration in each gear from some rpm point that is above the boost threshold, meaning say greater than 4k rpms.


This will get closer applying an impulse which shows the step response of the system. Note though that this is not the true step response as only a true impulse will show this.



I'm betting that if you floored that thing at 5k, it would overshoot like a MFer.

Re: Killing Wastegate Creep
 

My mate has built a "anti wastegate creep device" and his Doesnt Overboost.

But his is being a prick and doesnt want to biuld me one, but it defiantly werks.....

the more comonly known name is a Grainger Valve....

Re: Killing Wastegate Creep
 

Dude. Look here.

http://cgi.ebay.com/ebaymotors/NXS-M...QQcmdZViewItem

Welcome to 1995. :P

Re: Killing Wastegate Creep
 

what if I dont mind over boost of 3-4psi and I WANT increasing boost in each gear... will this sumbitch work?

Re: Killing Wastegate Creep
 

It will give you some random overshoot, but it won't increase the boost in each gear. That would happen if the wastegate couldn't flow enough, which is not dependent on this scenario.

Re: Killing Wastegate Creep
 

It says Boost Controllerr? wll it havethe grainger effect? anybody please help? Grainger is Wicked

Re: Killing Wastegate Creep
 

Ok since you didnt understand.

All a grainger valve is- a ball and spring adjustable boost controller. Thats it. Once your boost pressure reaches the set level, the ball "pushes" from its seat and pressure travels to the wastegate. As apposed to the pressure slowly building up on the wastegate. The effect is that the boost pressure applied is not acting on said wastegate until the very last moment. Hince your turbo "spools" faster. (not exactly but thats the principle)....
i.e. any ball and spring manual boost controller will have the same effect. And there relatively cheap now.

Re: Killing Wastegate Creep
 

And a ten minute job to make your self.

Re: Killing Wastegate Creep
 

Thanks for the link but they dont export to (South)AFRICA so im stuffed!!!!! :'( :'( :'(