Max Vane

[Killerbee]

This basically acts as a waste gate (and is the reason VVTs don't have wastegates) and lets air through the exhaust housing without it having as much affect on the turbing wheel.

This is very good insight, and I won't argue the finer points. You hit it. The vane is the only hardware that approximates the function of a wastegate. The max vane tables are analogous to the wastegate psi setting.

As for for the wastegate delete on VVT's, that is strictly a financial consideration, probably even pushed the advent of the VGT.

 

[catdiezel]

it already works. Just doesn't do what people think it does.

What i have seen is that when the program is "calling" for 23% -- I cant get it below 65%.....this is my own tuning problem. I also realize its trying to achieve say "32lbs manifold pressure" so it may think it needs 67% Soon enough I am going to install my backpressure gauge.....after i finish testing my boost gauge...there needs to be 8 days in the week---one of which the world stops spinning and everyone but EFI users are idle.

Still havent proven to myself yet what I am about to try so I wont even bother yet to go into detail.

Im still tinkering.....

getting really horrible mileage on this tank of fuel from all the tinkerings :rofl:

 

[Killerbee]

Target Vane does not control vane position when boost is being made. Stop looking at it, you will just drive yourself crazy.

 

[[email protected]]

So since efi live dosent give us any more tables to control the vanes, should we just leave the stock tables in (Max vane) and just adjust the desired boost and trust the ECM is commanding the most efficient vane position to make the desired boost?

 

[Killerbee]

Besides experimenting with max vane and MAF fuel, there is little that can be done for spoolup. The hard part changes have proven to be the most effective.

 

[othrgrl]

Besides experimenting with max vane and MAF fuel, there is little that can be done for spoolup. The hard part changes have proven to be the most effective.

There are alot of other tables that can affect spool-up. Timing, fueling, fuel pressure - they all play their part. I was to the point I had to put it in 4WD to keep traction while messing around from a stop (messing with other trucks, mustangs, ect), otherwise it would break traction as soon as I started moving and up to from a 45mph roll. Talk to a vendor about a real race tune for your truck.

 

[sweetdiesel]

it already works. Just doesn't do what people think it does.

So what does it do? Ive had it at zero across the table and it never seemed to change a thing

 

[sweetdiesel]

Besides experimenting with max vane and MAF fuel, there is little that can be done for spoolup. The hard part changes have proven to be the most effective.

MAF smaf, I agree with othergirl there is a lot that can be done with timing and fuel

 

[[email protected]]

I can't get mine to break loose from no spool untill about second gear.

 

[Killerbee]

So what does it do? Ive had it at zero across the table and it never seemed to change a thing

As best i have been able to determine, it is a resting place when there is no delta between set point and actual boost.

 

[Killerbee]

There are alot of other tables that can affect spool-up. Timing, fueling, fuel pressure - they all play their part. I was to the point I had to put it in 4WD to keep traction while messing around from a stop (messing with other trucks, mustangs, ect), otherwise it would break traction as soon as I started moving and up to from a 45mph roll. Talk to a vendor about a real race tune for your truck.

You and Simon both commented on this, so if you can, add to this thread with your suggestions for spoolup increase, ideology...share.

 

[TrentNell]

You and Simon both commented on this, so if you can, add to this thread with your suggestions for spoolup increase, ideology...share.

just a few things i have had work well on my truck ( LB7 ) so fueling should still apply but no turbo adjustment here , lack of fuel will spool slow but to much can slow it as well . i have had good luck with adding a min of 5-10 mm3 to my maf limmiting tables ( for basic street tune ) and running quite low timming below 2000 rpm ( less than stock ) . like i stated street tune race tune ( drag strip tune ) i have defferent method .

 

[[email protected]]

How can you add to your maf limiting tables if your pulsewith table is stock?

With my truck and a 2000+us tune the stock maf limiting tables do not do much limiting.

Ive tried to look at the percentages of change between my pw table and the stock pw table and make the same percentage adjustments to the my maf limiting table starting with the stock maf limiting table, but it just restricts it to much.

Anyone else try this?

 

[TrentNell]

How can you add to your maf limiting tables if your pulsewith table is stock?

With my truck and a 2000+us tune the stock maf limiting tables do not do much limiting.

Ive tried to look at the percentages of change between my pw table and the stock pw table and make the same percentage adjustments to the my maf limiting table starting with the stock maf limiting table, but it just restricts it to much.

Anyone else try this?

your pulse width table has nothing to do with your maf limmiting table . maf limmiting table is the maximum amount of mm3 that will be allowed to be injected per that maf reading . pulse width table references this mm3 amount the maff decided was apropriate and combined with fuel pressure to determine the pulse width to be cammanded you can have a 3000 pulse width tune but if the maf table ( and other limmiting tables ) does not tell it to inject 100 mm3 you are not getting your max pulse width . i dont mod by percintage on most tables i look at the table and drive/log and go by feel , not all of the table needs to be modded the same . also there is the MAP limmiting table to consider also .

 

[catdiezel]

OK----according to my RECENT testing. By changing the values of desired boost DOWN lower than what is actually to be expect HELPED bring most if not all of the percentages for the VGT within a very respectable range within the map.

In doing this the high/low boost fault tables need to be adjusted, specifically the second timing for the fault to occur. I took all of mine to the max 655.

Worked for me. These Runs I was able to keep it at and or right on 31-32lbs~ Not done tinkering yet----havent had alot of time to but plan on more tinkering, BUT so far I am able to keep the Vanes at 25%~ WOT @32psi.

I need to hit the track and see what the difference is inbetween the two.



I made a few timing changes and fuel changes but only at mid range throttle and cruising. Everything WOT is all still the same.



My next tinker toy I would like to invest in would be a pressure transducer module for CP testing. Getting bored can be expensive---hung up between that and a AR-15.

 

[[email protected]]

So why would the ecm be making more boost that commanded? Isnt that a saftey issue, I would think if there was something wrong it would always try to make less boost than commanded?