How do VGT Variable Geometry Turbos work? Common faults for diesel engines. Variable vane turbos

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Күн бұрын

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@VecksGarage 15 күн бұрын

That's so cool. Here in ZA we call them VNT Turbo's (Variable Nozzle Turbine Turbochargers). And 100% spot on with the common problems, welldone! 🎉

@danmeifert2469 10 ай бұрын

Thank you for this. I always enjoy your videos especially on the Cayman.

@GarageTechAutomotive 10 ай бұрын

Thank you 🙏🏽

@RomanJockMCO 3 ай бұрын

Thank you for answering a question I've had since the late 80s when Chrysler came out with their VNT turbos.

@ugurgumushan 2 ай бұрын

I was curious about when turbo kicks in, in my Hilux and I found this video. This explained it. Thanks.

@glenngray6895 Ай бұрын

Thank you for explaining that so well, I had that need to know!

@jhondo7614 2 күн бұрын

How to adjust a vgt turbo to start boosting at lets say1800 rpm instead of 2100 and boost a little more as well ?

@Vienuvienue7010 Ай бұрын

Very good 👍😊

@glenngray6895 Ай бұрын

Would it be better to have an emergency wastegate set slightly higher than the boost pressures you're looking for.?

@GarageTechAutomotive Ай бұрын

@@glenngray6895 Some setups have wastegates as well but generally the changing angle of the vanes is enough to slow the turbo down when needed.

@Fubarpapa Ай бұрын

I noticed if vanes are too closed at idle engine will bog/suffocate and will not spool fast. There is optimal position for vanes.

@akrider174 3 ай бұрын

I have a 6.7 Cummins with a 467.7 turbo with a mechanical vgt 3 stage spring actuator. It’s adjustable. Right now at lower speeds it has massive turbo flutter and boost drop from 30 to 15 then wot it goes away and builds to 45psi no issues? Should close it more or open it more to fix the issue?

@justasleleiva1351 2 ай бұрын

Hello, I have a question regarding my whisling turbo The turbocharger is brand new and bought it from Garret And just today came up with idea to disconnect turbocharger actuator which is electric and then there's no more whisling Where's the problem? Car is remaped

@GarageTechAutomotive 2 ай бұрын

@@justasleleiva1351 could be where once the turbo has spooled up, the waste gate starts to open or if a VGT the vanes are in a position where it causes a whistle, with the actuator disconnected it’s preventing it from over boosting which doesn’t create a whistle noise.

@justasleleiva1351 2 ай бұрын

@GarageTechAutomotive so could it be too early boost or overboost? Is there possible map or maf sensors sending wrong readings to ecu etc?

@GarageTechAutomotive 2 ай бұрын

@@justasleleiva1351 number of things to consider? Why was the turbo replaced in the first place, what sort of map was added, peak bhp etc, was this before or after the turbo was replaced?

@justasleleiva1351 2 ай бұрын

@GarageTechAutomotive Well it's pretty long story, but in short: Dpf gutted and oem turbocharger had slightly shaft play (so back pressure damaged), Get rid of dpf, refurbished turbo correctly installed Remaped at proper tuner Were whisling noice, tuner said turbo not 100% fine Drive over 7kmiles nothing changed Bought new turbocharger, Washed oil sump, checked oil supply, replaced numerous of gaskets of intake system, together with new intercooler and inspected exhaust manifold, no leaks.. So after installing a new turbo charger after 2-3 weeks noice appeared but not so terrible as previous turbocharger So with this whisling i did an Europe trip, nothing went wrong Except still whisling, there plenty of power Until yesterday i came up with idea to disconnect electric actuator and then there's no whisling at all... so i can't really figure out what should i look next. I do suspect bad map Bmw F10 530d 2011

@GarageTechAutomotive 2 ай бұрын

@@justasleleiva1351 so do you still get the same power and boost with it disconnected? I would suspect that due to the modifications the whistle is probably normal if the turbo is still good. After a few miles it’s likely it’s built up some soot and the way the air flow now goes it just makes that noise. I know on some VW’s there used to be little air guides within the downpipe of the turbo which helped direct the exhaust gasses in such a way it reduced any whistle noise. Deleting the DPF will also change the way the exhaust gases swirl around plus the reduced back pressure and increase in boost. Have the mappers given any thoughts?

@Luvdh-i5s 24 күн бұрын

Good!

@bsee_1aquinteroalfredlouis884 4 ай бұрын

What actually controls this vanes in a vacuum actuated one and where is the input coming from?

@GarageTechAutomotive 4 ай бұрын

@@bsee_1aquinteroalfredlouis884 the vacuum diaphragm valve is control by an electronic solenoid valve which is basically a switch which allows the vacuum pressure to move the control rod which moves the vanes. The solenoid valve is electronically controlled by the engine ECU. The vacuum pressure is created by a vacuum pump 👍🏼

@bsee_1aquinteroalfredlouis884 4 ай бұрын

What are the sensors that plays a role in the boost control

@GarageTechAutomotive 4 ай бұрын

@@bsee_1aquinteroalfredlouis884 the ECU will control the boost pressure from information from the boost pressure sensor, ambient and intake temperature sensors, fuel temperature and pressure, engine speed, load and temperature. There are lots of variables which impact it.

@ritchieschofield1185 4 ай бұрын

I have a p2563 boost control circuit amplitude below and above min max on a 2019 ecoblue transit. Replaced actuator the rod moves freely and you can hear turbo boost on and off by manually moving rod. It over or underboosts. I'm stuck! It's a brand new turbo. There's a 5 pin connector and all wires in tact gnd ok 2 x 5v refs but none on other 2?

@bambibigboy 2 ай бұрын

Great video mate. Could I ask you a question please.

@GarageTechAutomotive 2 ай бұрын

@@bambibigboy hey sure , 👍🏼

@jishnups8859 7 ай бұрын

Is it vGT have waste gate?

@GarageTechAutomotive 7 ай бұрын

No, that’s a normal waste gate turbo. These are VGT with variable vanes

@sockself 7 ай бұрын

would a geared turbo be a better solution if possible in cars? I know jet engines have geared turbofans that obviously work on different mechanisms, but seem to be the best solution for jets. Is it just complexity holding it back from cars or is there something else?

@GarageTechAutomotive 7 ай бұрын

Suspect it would be the turbo lag or just general complexity. Probably why they have sequential turbos with one small and one big.

@savioursakala-tw5qs 8 ай бұрын

What is the constructional difference between the VGT and the ordinary turbo charger

@Jonjs99 7 ай бұрын

wastegate

@scotty1004 3 ай бұрын

Ive got a overboost problem in my vauxhall inshitnia i think i just learned whats causing it= sticky veins

@مہحہلل 6 ай бұрын

what the best,, VVT or VGT??

@scottwebber705 7 ай бұрын

Why is my boost air so hot ?

@GarageTechAutomotive 7 ай бұрын

Hey, is this a problem with your car or just a general question on what causes the boost air to be hot. As the turbo is connected to the exhaust naturally there’s heat transfer. Secondly, when you compress air it heats up, hence why it’s common to have an intercooler.