Stock GMC Sierra, new twin turbo kit installed, need advice and tune.

[Anthony5.3]

found the link, too confusing to work with. I'm copying all the data to excl and changing the tables manually, any easy way to this? what a pain in the arse

[Anthony5.3]

ok, so question...can you do a SD tune without going to a 2 bar os? and also kill the maf? cause if so maybe I should justreturn to the stock OS nd kill the maf and just tune the vve table for the boost?imjust looking for the simplist way to tune this thing

[5FDP]

Yes.

[GHuggins]

Here are a few pictures illustrating the VVE editor for selecting which bar format you want to use... This is a 3BAR vehicle I've already tuned so it won't look like yours persay... I may have mis-spoken or illustrated how to do this previously - you left click - not right click on the map header... It should open the base 1, 2 and 3 bar formats - I displayed the 2 bar for you in this example...

Yours is a turbo, it won't look like this one - yours should have a hump in it right where the turbo starts to spoil...

[Anthony5.3]

thanks. I found that tab to change it but the map and rpm are switched, so its a pain in the butt to manually enter a bazillion numbers into the 2 bar os

[GHuggins]

Alright - I'm starting to get tired of this... I was replying to where you previously were discussing going back to the VVE and didn't know how to change the map settings to a 2bar...

If your dead set on using the enhanced OS - here's the easiest I can possibly make it... Open bluecat / Open your stock tune files VVE table and open it up on the 2 BAR setup / In the bluecat tool - open the blank VE table - click on the Tools menu at the top of the screen / Delete out the rpm and map tables that it defaults to / In the stock tunes VVE table - click on the map and rpm axis's - highlight - right click copy and paste into the bluecat tool in the appropriate areas one at a time - hand enter commas into the numbers to designate their divisions - click update table - your bluecat table should now look identical to the table in the HPT editor - after doing this - highlight the VVE table in the editor - right click and copy / paste into the bluecat tool - go back to the VE table 3d view in the bluecat tool - it should now look just like the 3d view in the hpt editor - go back to the bluecat VE table and go back to TOOLS - click on the "axis" - change to inverted - Update Table Data once again - your VE table format should now be identical to the enhanced OS setup!!! The axis still won't be identical - you'll have to highlight and copy each rpm row that you have and paste that into the tunes VE tables then interpolate between to fill in the blank rows...

I really can't make it much easier than that to input the data...

[TAPyvehc93]

To the OP, I am running the factory OS on my single turbo 2011 Sierra. No need for the 2bar OS in my opinion. I am also still running my MAF.

[Anthony5.3]

Thanks for the info I'm working on it. Also in regards to going back to the original os., I go over passes hauling a 23ft boat going through lots of elevation differences, sticking with the 2bar OS I feel is the best idea.

[TAPyvehc93]

Thanks for the info I'm working on it. Also in regards to going back to the original os., I go over passes hauling a 23ft boat going through lots of elevation differences, sticking with the 2bar OS I feel is the best idea.

I still don't see the need to go with the 2 bar OS as you can run the factory virtual VE up to three bar. I'm running 14lbs on it now. But to each your own.

[Anthony5.3]

Man I keep getting confusing information one person says I should do this the other person says I should do that it totally makes sense to stick with the stock OS because most of the information is already there and tuning would be a lot simpler I suppose but I have no idea what I'm doing and I'm slowly learning wish I could get some solid info on what is the best route for my set up ,I'm just doing a simple TwinTurbo set up running 8 to 10 pounds of boost nothing major..injectors... 2bar map ..and that's it... I haven't even got injectors yet, right now is just a bolted on TwinTurbo kit and a 2bar map sensor installed lol

[GHuggins]

I was against it, but if your changing elevation and going pure SD - where the baro settings can throw fueling off over 10% - then I would say go with the enhanced OS upgrade... The baro update cap would be the only real reason for this though... If it were still on MAF, which I don't recommend for your usage then you could stay OE - the MAF will make up for the baro updating and keep fueling within 3 to 4 percent and sometimes less...

The VE table is going to require work, but it would have to be dialed in if your MAF anyway, Soooooo...

[Anthony5.3]

Hey TAPyvehc93 what all did you upgrade to be able to run 14lbs? Just curious to know. I was told just injectors, pump, 2bar map, plugs for 8-10lbs is this accurate? Thoughts?

[Anthony5.3]

Also, just an update. Truck is running👌.

[TAPyvehc93]

Fuel pump and injectors for sure, plugs, MAP. sounds about right. Hope you don't have a 4l60 or that too.

[Anthony5.3]

I'm not certain because I haven't really looked but I believe it does have the 4L60E I heard they are not too bad though...

[Anthony5.3]

And a 10 bolt lol

[TAPyvehc93]

10 bolt is fine, just install a detriot trutrac. That stock 4l60e is going to go out super fast. That thing wont hold 4psi. I have a 6l80e in mine.

[Anthony5.3]

Yeah I was doing a lot of reading last night and it sounds like upgrading the transmission is a must that sucks it's going to be another however much for me to find one and install it. Is swapping it out to a 6L80E the same as doing the swap for a 4L80E? Because a six speed would be nice