why is the Turbo Vane Target Position so high at idle??? would it hurt to try to open the vanes up at idle and low power situations? i have no need for boost unless i am on the gas.

It's high because we LOVE :rolleyes: that GREAT hissing sound coming out our exhaust!! -:t I think it has to do with 2 things 1 lower emissions and 2 grade braking when in T/H mode (i.e) it causes a little more back pressure??????? I lowered mine it almost sounds like an LB7 now at idle.

Sending gasses back through the EGR system wouldn't have anything to do with it?

ok i am ging o lower mine so it will have less back pressure at idle and low throttel.

i guess if i don't want the back pressure or boost i wouldhave to reduce the boost in the same areas or it will close the vanes just eough to create the boost desired anyway?

You can peel the vane position open at 800 and below. I have mine set to 15% IIRC at 800 and below. Makes it have a very low deep idle. Plan on closing em back up for winter so the EGTs run a bit warmer at idle when its cold. Or may see if I can mess with the temp multipliers and get ti to do it on its own. Havent looked into that enough. Dont need to mess with the boost. It will peel it down to it. If you want to it open em all the way you may have to mess with boost......but to get 20% or so you can run stock boost.

You can peel the vane position open at 800 and below. I have mine set to 15% IIRC at 800 and below. Makes it have a very low deep idle. Plan on closing em back up for winter so the EGTs run a bit warmer at idle when its cold. Or may see if I can mess with the temp multipliers and get ti to do it on its own. Havent looked into that enough. Dont need to mess with the boost. It will peel it down to it. If you want to it open em all the way you may have to mess with boost......but to get 20% or so you can run stock boost.

how far out can you run that low of vain position. can you run that all the way out to 2000 rpm so there is as little back pressure if you want better fuel economy with no boost

I have a tune that has less boost below 1700 RPM. Basically I’ve been setting my cruise at 65-70 MPH trying to salvage fuel mileage. I don’t think you can go take too much out though. If you still have your DPF, it will regen like crazy, your turbo will surge when letting off too fast, and you may have high gas temps to contend with. Oh yea, I’ve asked around and also confirmed that the target boost levels are the best place to start. The vane position should be altered around the target boost level to make it: more smooth, surge less, and that sort of thing.

Hope this helps

why is the Turbo Vane Target Position so high at idle??? would it hurt to try to open the vanes up at idle and low power situations? i have no need for boost unless i am on the gas.
wont hurt it will just help:) it will reduce the drive pressure
lower your boost as well in the same area that you reduce the vane
vane max has the most effect on the vvt turbo

It's high because we LOVE :rolleyes: that GREAT hissing sound coming out our exhaust!! -:t I think it has to do with 2 things 1 lower emissions and 2 grade braking when in T/H mode (i.e) it causes a little more back pressure??????? I lowered mine it almost sounds like an LB7 now at idle.
i think its because we dont have the intake heater and it would help keeps the heat in when cold?

Sending gasses back through the EGR system wouldn't have anything to do with it?
why not would it not reburn the gas hence less emissions?

Or may see if I can mess with the temp multipliers and get ti to do it on its own.
have fun with that:D

Havent looked into that enough. Dont need to mess with the boost. It will peel it down to it. If you want to it open em all the way you may have to mess with boost......but to get 20% or so you can run stock boost. you need a drive press gauge you will change alot of your advice;)

why not would it not reburn the gas hence less emissions?



I think the point Diesel Day Dreamin' was getting at was that the egr system won't function as it was meant to from the factory unless there's a pressure difference between the intake and the exhaust (exhaust having higher pressure). If you have your vanes open at idle, there's no exhaust manifold pressure to force exhaust gases into the intake manifold.

:ninja:, Nick

as I understand it and based on what I have noticed....If you want your boost lower at 1700 and below you need to lower your requested boost table. The truck will attemp to keep the boost at what ever you set the boost table at. It just uses the target vane position as a starting point basicly. Most people dont jack with the target vane position I dont believe and thier boost goes were ever they set it.

Check out the post I made about the 299 code in teh custome tuning software forum(combined efi live and HP tunner section)

wont hurt it will just help:) it will reduce the drive pressure
lower your boost as well in the same area that you reduce the vane
vane max has the most effect on the vvt turbo


i think its because we dont have the intake heater and it would help keeps the heat in when cold?


why not would it not reburn the gas hence less emissions?

you need a drive press gauge you will change alot of your advice;)

How so? All I'm jacking with is at idle. I am taking it from running 80% closed or so stock to 20% or so.

I also figure if I can jack with the multiplier at just idle I can have 1 tune that based on how cold it is it will close the vanes up and keep more heat in the motor in theory at idle. Or open em up when its warm.

I dont see how it idling with the vanes closed or open will matter if I'm watching drive pressure?

I wouyld be real interested in hearing any of your thoughts and expereinces on drive pressure :)

I think the point Diesel Day Dreamin' was getting at was that the egr system won't function as it was meant to from the factory unless there's a pressure difference between the intake and the exhaust (exhaust having higher pressure). If you have your vanes open at idle, there's no exhaust manifold pressure to force exhaust gases into the intake manifold.

:ninja:, Nick

:exactly: , Give that man a Cigar.

But with EFILive, I guess you guys just turn off the EGR. :D

Blocker plate :D And turn off the codes and the EGR :D

Blocker plate :D And turn off the codes and the EGR :D

Sweet! One of these days... Me will have EFILive too.:D

:idea::exactly: :HiHi:

now how can we make that turbo sing?

now how can we make that turbo sing?

get a hearing aid :D

now how can we make that turbo sing?
ill send ya the desired and the target tables and you can hear it scream:)

why is the Turbo Vane Target Position so high at idle??? would it hurt to try to open the vanes up at idle and low power situations? i have no need for boost unless i am on the gas.


robert
i think you are smart to do this lower the max vain position
it will reduce the boost too but dramaticly reduce your drive pressure
i wanted to do more testing with the VVT but said screw it and installed the HTT
one thing i did notice is that the drive pressure was very high right off idle untill 1600-1800 rpm then its still high but not tripple the boost

playing with the vane max was fun and changes alot of things IMO
on how your truck is

How so? All I'm jacking with is at idle. I am taking it from running 80% closed or so stock to 20% or so.

I also figure if I can jack with the multiplier at just idle I can have 1 tune that based on how cold it is it will close the vanes up and keep more heat in the motor in theory at idle. Or open em up when its warm.

I dont see how it idling with the vanes closed or open will matter if I'm watching drive pressure?

I wouyld be real interested in hearing any of your thoughts and expereinces on drive pressure :)

drive pressure was not affected at idle no matter what the vane posistion was

have you had any succsess with the multipliers because i did not
i maxed the tables and never changed a thing there was a post about this along time ago

what do you want to know about drive pressure? i had a gauge in and the one thing i can say is it does kinda follow the vane max table if its high so was the drive pressure

I figured at an idle even if you closed em all the way up it wouldnt run the drive pressure though the roof.

Havent messed with the multiplier. Too busy trying to make it go fast I havent jacked with that stuff yet ):h

I figured at an idle even if you closed em all the way up it wouldnt run the drive pressure though the roof.

Havent messed with the multiplier. Too busy trying to make it go fast I havent jacked with that stuff yet ):h

its amazing how much drive pressure you can get off the VVT some tunes i had would max out a 100 psi gauge after installing the HTT it follows boost for the most part, kinda a waste of time even having the DP gauge now:rolleyes: but if you are going to play with the VV turbo it does help to have one IMO