VNT control without electronics
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- Опубліковано 19 чер 2017
- Part of the Suzuki GTI project. This is to explain how I have found a way to control a variable nozzle Turbo without using Electronics using vacuum actuators feel free to ask questions in the comment section
EDIT, in the video I said that this was a cheap Chinese knockoff. The actuator is the knock off the turbo itself is a genuine Garrett unit
Thank you I have been looking for a long time trying to figure this one out for my turbo project .... brilliant 👏
I am planning to build this actuator from scratch from aluminum. In this way I can make the spring adjustable and seal the stem. Only need to fetch a suitable diaphragm for this purpose (maybe demolish another actuator and reuse the diaphragm).Thanks for the info
Marcel Hendrikx honestly from my years of messing with wastegates, it is far easier to use a light spring and use a MBC to control the boost. You will get much more uniform results. I have modified springs before, but once you pop the crimp seal it is difficult to get it to seal right again. I have melted diaphragms before welding the halves back together. Hence why I have gone this route..simple and reliable
Marcel Hendrikx it also is hiw garrett did the actuator for the VNT25
Hey buddy. I subscribed you channel and watched all your videos. You are my hero. Because i always wanted to turbocharge my 1.2l engine with a vnt turbo and all my friends told me it want seize and burn. Id like you to ask you one some questions, if you want, how can i ask you in private? I cannot send you a private message through UA-cam I can't find options on the menu. Thank you
Exactly as you mentioned in the video, use the boost pressure on the opposite side of the actuator to control the vanes. Maybe it is necessary to adjust the spring load for the correct response.
Marcel Hendrikx can't modify the spring in this unit, it is a 5psi base spring so you can use a manual boost controller
Nice work
great concept dude. just to be clear, when you say boost controller,can that be mechanical boost control {dawes valve} or ebc? also is the overall boost pressure set by the vane stops or is it a function of the actuator? i have no experience with this type of turbo, so very new and interesting stuff.
I pulled the actuator apart and moved the spring to the opposite side of the diaphragm. I then rotated the actuator placement to the opposite side of the vein control arm. I suppose this method varies wether you have space to move the actuator.
Thanks for the advise
Awesome!
Hey bud, awesome vid. Ive been searching for justhis particular info for the longest. I have a 2005 ford powerstroke that i would like to slap on a 68 327 sbc. Whattya think my man, doable or we talking engineer level skills?
cool video
Cool. I want to turbo my 6.2 diesel..twin turbo. For about 200 HP. Two VNT 17s is about right, 3600 rpm redline. It has a vacuum regulator tied to throttle for the transmission (TH 400). Your method will be perfect.
I want to install the same turbo in this video on a om606 mercedes, so i just need to bring a vacuum line from the trans to keep it closed and run boost line from the intake manifold to make it work ?
Nice!
Can the exhaust gas pressure force open the vanes as it can on a normal wastegate?
4:29 Is it perfect really, it looks like itll leak bacuum/boost a bit
I want to build a fully mechanical vnt turbodiesel and i need a 2 port actuator to do it... Hoping this will work.
Very clever simple system by the way, cheap too and no electronics
but does the boost also go in the vacuum side? or do you have some kind of one way valve to prevent it?
You would need a check valve for sure.
hay bud can you give me a little info im confused on or if ya know? I have a diesel so there's no vacuum just boost so would I just hook it to 1 side and use a different weight spring for return since I have no vacuum for the return? thanks
Hey, you showed a two port vacuum actuator that you said was from a 2.7 L Sprinter diesel....is this the one you used on your setup, I want to try this on my 1.9 L diesel Volkswagen and port it in from the boost side of the turbocharger, is the original vacuum side just to atmosphere.... you would have to displace the air somewhere?
I used a modified check valve to the line when under boost
What are you running for a boost controller?
What is the part number on that actuator.
Can I use this setup when I'm convering a diesel motor? There's no vacuum.
Is it good to use on petrol?
How did the car perform?
So by now you must have tested this system. Does it work? I'm doing a budget quarter mile challenge and the turbo that I have been gifted is a variable geometry setup, which makes life ideal for horsepower but not ideal for cheap control
Yes, it works very well, see the other vnt video
@@southwest82 ah yes. Looks like on my project I can skip the vacuum actuator component anyway, all I care about is my daihatsu applause to do a 13 second pass for less than $1300, not economy or anything.
Hello Southwest82.... I am unclear about what you said re: diesels... I am wanting to put one on an VW AAZ...No ECU electronic controls.... I think it's a great solution but it looks to me like you need the variable vac pressure of a gasser... any advice on making it work on a AAZ diesel? Or is the RPM effect on the vac pump enough?
Stv tppng unfortunately the vacuum pump will typically put out a consistent vacuum. There are some complex ways to cheat this using a variable orifice but for my personal 300sd Mercedes diesel it was not worth the hassle for me or 10 pounds of boost. Using this turbo on the gas engine however I can really take advantage of the variable
makes sense. Thank you for you expedient reply!
Stv tppng not a problem I just happen to be on UA-cam when your question popped up. Since diesels constantly run in boost a good traditional turbo is probably the most reliable option. You can fiddle with the aspect ratios of the turbine as well as possibly a slightly larger compressor but it becomes a trade-off because with most diesels simply turning up the Boost will not add much more power unless you fiddle with the injection pump that was the case with my om617 Mercedes diesel
I get that... thought it would be easier. If I have time I might make the whole arduino set-up with crank speed, throttle, etc...... but I think it is too complex for me right now. Thanks again.
I have been trying to think through this for an old mercedes as well. It seems to me since diesels dont have throttle bodies to worry about and dont really generate vacuum that a simple wastegate actuator setup (diaghpram pushing on a spring) might work for control. At idle spring pressure would keep vanes closed, at higher RPMs and more load boost would build pushing the actuator back and opening the vanes as it approached the preset boost level. Am I over simplifying this or missing something?
Я применил двухступенчатый регулятор по давлению. Только тогда это заработало как надо.
could You give me the actuator OE/part number which have dual port? which You used to build, or can can provide any schema/blueprint?
they are all the same in garrett vnt turbos.
Hello there! need some advice, i hat a 2.5 tdi land rover old non electrical engine , i want to put a gt2556v (bmw) need 25 psi, it will work this modification on gt2556v vacuum actuator?
calbazuc no, only on gas engines with throttle actuators
thx. but can you give me an advice please about controling the vanes, can i do it on boost control? also i see on youtube a very simple method based on a simply spring , the vanes is control by drive preasure and the spring close the vanes when you lift acceleration .
Ciprian Stetcu on a diesel engine without electronic control it is virtually impossible. The original setup on the Sprinter vans was electronically controlled and I adapted this for a gas engine which uses the pressure differential across the throttle plates. If you use a straight wastegate controller the veins are going to be closed almost the entire time causing an enormous amount of back pressure. That is how I originally control them and it went up causing an enormous amount of problem until I solve it
Will check valves be needed on both top and side?
Just on the vac side. It has a bleed to atmosphere hole on the actuator side of the check valve, so when the vac drops the actuator can close
@@southwest82 thanks for the reply, I guess it will always leave a minor boost leak? I've been searching around on the Internet and whilst this isn't cost effecient would you say this actuator operates using a similar principle?
www.forgemotorsport.co.uk/Renault_5_and_Renault_21_Adjustable_Actuator--product--86.html
How would this work on a diesel with no throttle body
It won't
What about the cars which lack vacuum?
Not sure what you mean. Nearly every gas car has a vacuum port somewhere
but isnt it the same thing that vac on one side n boost on tje other so rod travels the same way. why havin vac n boost
.?
When the engine is not under load/boost, you want the vanes open to allow a less restrictive exhaust. When it is under boost, the vanes will open in relation to the pressure to keep the boost at set point. It is a very simple and reliable setup
@@southwest82 Bro honestly, i still didnt understand what u tried to explain in ur reply bcuz my english is not as gud as u guys. If u can pls try to explain it one more time to me. I'll appreciate. Thank u brother. Whats vaccum's role n what is boost's role in this..? That whole vdo did make sense to me but bcuz some language problem i didnt really get it. Thank u.
Did you already test this system?
Marcel Hendrikx I have. On the previous setup I used the reverse vac boost and it worked well
Did you have to change spring settings? Send me your e-mail brcause I would like to do a similar thing on a BMW diesel.
Marcel Hendrikx you can pm me through youtube. A diesel may be harder to control because of a lack of throttle plate, I have a Benz 300sd I want to VNT, but haven't figured out how to regulate the vacuum.
This setup is for a gas engine
@@southwest82 I used to run vnt / vgt turbo into old diesels without throttle plate just by using a normal classic pressure wastegate hooked to compressor housing.
@@fabriziopandolfi1857 but on gas engines you have to vary the vane position based on throttle
Would you be able to email me or message me on here I am working on a project and this is the closest thing I have found to what I'm trying to do! Thanks
B b on