Thats a really bad controller.
VGT turbos need to be adjusted based on engine load for both performance and efficiency. VGTs are most efficient in the 50% range. With no throttle position or EMP input, the controller is "flying blind" and is little better than using a simple wastegate actuator. It will also sacrifice spoolup ability, VGTs primary benefit. If you were controlling your VGT properly you wouldn't need a supercharger to get good low end response.
Thats a really bad controller.
VGT turbos need to be adjusted based on engine load for both performance and efficiency. VGTs are most efficient in the 50% range. With no throttle position or EMP input, the controller is "flying blind" and is little better than using a simple wastegate actuator. It will also sacrifice spoolup ability, VGTs primary benefit. If you were controlling your VGT properly you wouldn't need a supercharger to get good low end response.
If you were controlling your VGT properly you wouldn't need a supercharger to get good low end response.
X2. I can show you a data log of boost practically peaking the same time as the throttle on a 2012 duramax LML going from cruise to WOT.
Good VGT control has to have a smart controller and load/throttle feedback.
Thats because you've never experienced your turbo working properly.My controller works fine
Except that your "automatic" setup is very inefficient and has a very negative effect on spoolup.it has two functions automatic responses and manual control of the vane.
That is flat out wrong, you're not working with a wastegated turbo. VGTs require load/throttle input to work properly. Without it you either end up like yours with laggy/jerky response or you choke the exhaust flow at light loads.Cracks me up, how a lot of people think VGT's need to have a lot of information to control the VGT. It really doesn't, boost pressure sensor is all you need and it will work better then a standard non-VGT turbo.
No, by your descriptions its changing position based only on boost output. Boost output in VGT turbos is not based on load. An engine at constant RPM and load can have drastically different boost pressure based solely on vane position.The Boost pressure sensor changes the position of the vane based on engine load.
Sorry, no, that is the very definition of performance.the TPS can allow you to open up the turbo when you pull back off the throttle to lower drive pressure for better MPG. Then when you hit the gas close up to build pressure faster. Other then that it wont give you any better performance.
That is proof you're not controlling your turbo correctly.The HE351VE wont out perform the HE351CW in my opinion, they will be fairly similar in performance. The benefit of the Holset VGT is the exhaust brake and the ability to lower drive pressure.
I already did back in 2005. Thats why I'm trying to share my experience and correct your false information.If you don't believe me, make your own controller and prove me wrong.
Blind leading the blind. Need I say more?I have built quite a few controllers for people and I haven't gotten any complaints.
Blind leading the blind. Need I say more?
Shadowtrooper, Garrett's variable nozzle Turbo's are different then the sliding wall that's in Holset VGT turbos. The way they perform are completely different.
Garrett uses a linear actuator, moving an arm in a controlled linear motion.
Holset uses a stepper motor which can only jump to preset positions.
Well I'm not a vender on Comp D and this thread is for supercharged 4BT not for my controllers.
Feel free to make another thread on VGT, VNT stand alone controllers I'm sure you guys have vast amount of knowledge people would be interested in reading.
No worries
I added a second pulley, I couldn't get as much wrap as I hoped. But its defiantly an improvement. I should get a new 3" pulley for the supercharger on the 8th, once I get that on it should be a lot better.
http://www.youtube.com/watch?v=WgK5AoDfUy4
You know... he shows up after bohab is banned, who showed up after tormentor was banned...Nukem. Did you used to have a screen name Tormentor?
He gets banned after I post this...Not legal in any state.
You know bohab. Its interesting. You have a good knowledge of Mercedes engines, Holsets turbos, want people to keep stock power ratings, act like a know it all, and joined a week or 2 after tormentor got banned.
If I have you wrong, sorry. But you started out as tormentor the same way after 300D or whatever it was got banned.
Carry on OP. I'm sure its been done.
You know... he shows up after bohab is banned, who showed up after tormentor was banned...
He gets banned after I post this...
Same time line... same know it all attitude... same knowledge of turbos.