I can only dream about that at the moment. Wife, baby, school, farm, wife, babywifebaby ...

 

Ok, couple crappy vids, lol!

Underhood. Using a w/g actuator as the stop for the small side and a random spring that hold it there untill drive pressure overcomes spring tension. You can see from the vid that my start point is pretty close to e-brake mode.



ebrake. With the limiting rod removed, I can engage e-brake manually and you can see that at 500 rpms there is enough drivepressure to open the housing up to roughly my start point.



In cab with e-brake on. About 15-20psi drive pressure with the spring holding e-brake on. At speed, a stock 6.7 3rd gen sees about 60psi drive pressure when the brake is activated. I barked the pedal a couple times and eventually the spring slipped off.

 

Well I hate to hear that it's breaking parts....but at the same time, that's pretty bad***
The nice thing about the set up I am going for is everything will be adjustable so whenever I plan to do some towing it should be as easy as adjusting the stops for better spool up.
Hey G1625S have you checked out what unixcowboy is messing around with to reducing the barking? He is using only the wastegate actuator to control his vanes as well, but he is using some sort of choke system to control how fast the boost to the actuator is bleed off, making the vanes close slower when letting off the pedal quickly. Haven't heard any progress but seemed like a pretty great idea.
Anyways, I drew up a few more designs showing how everything will work, gives a little better idea of whats going on in my head

 

The spring on the throttle cable needs to over come the wastegate BRIEFLY, or you risk overspeeding the turbo.

 

I think I understand what your saying, you mean from cruising at say quarter throttle to full throttle having it close up that tight right away would overspeed it?
By they way I thought your name looked familiar, your post in my thread mopowas twins on the drawing board about using throttle to close the vanes for quick spool is what gave me the idea for this. Hopefully I can get it too work! Would appreciate any ideas you have DieselJon
Cheers

 

Call me Jon.

I think a spring set-up like our return throttle spring would work great! Nothing too strong as the wastegate needs to over it by 1.5-2.0x of the boost:drive pressure ratio. Make sense?

I have read that beyond the 1:2 ratio, look for a blown HG, snapped shaft, etc.

 

Yup absolutely agree with you Jon, I thought at first it would be too complicated to use the throttle to control some of the vane movement at first, but once I started thinking about it more and doing some mock up drawings it seems like it should work as a great set up.
If you look closely in the last set of pictures I posted of all the positions, you can see that at 30 and 40 psi I showed the wastegate overcoming the throttle spring, so as to make sure I don't get above the 2:1 ratio you are talking about.
I thought you were talking about a quick blip of the throttle closing the vanes tight at a cruising rpm is what may cause the turbo to overspeed, but like you said as long as the throttle spring isn't too strong I think the wastegate controlled via drive pressure will be able to catch up quick enough to open the vanes as not to overspeed it.
Will take a lot of small adjustments to get it perfect I'm sure, but once dialed in should be a monster! Especially working as a secondary in a set of compound turbos