Installed & did the write entire on the ECU. Took about 1.5 hrs changing the sensors, soldering, heatshrink, taping looms et al. 23 psi without any wastegate foolery. Boost drops off to 17 psi @ 6500 rpm though. 5.6 sec 60-100 logged with whacked out fuel trims last night.

Working on my tune but so far it's very promising. I'm pleased. Have to start over on the fuel trims now though.

Thanks to Matt (mkriebs) and Performance Autowerks! Sensors & pigtails worked out well!

 

Cool man

 

Do you have to have the GMS1 OS in order for the 3 bars to work properply or will they work out of the box?

 

I believe they are using a GMS1 tune to remove the learn down as well as get the info for the upgraded map sensors. This is the best route to go in the sense the computer should be able to fine tune itself once whom ever is tuning gets it close. Also removing the learn down in theory I think would make for better gas milage since it adjusts for the weather conditions make more output instead of limiting boost to stay within a certain power output. Almost the same idea as going from a carb to fuel injection.

 

i'm wondering the same thing i would like to get the 3 bar but dont wana spend 500 for stage kit

 

You have to rewrite the whole ECM with the stage 1 OS. I did mine myself. Spent $80 total on the sensors and connectors and about 2-3 hours total installing the sensors and flashing the tune with HP Tuners.

 

Oh win!

 

I think the 2.5 bar stock sensors see up to 20psi and the 3 bar can do 30psi properly. Bill or term2 remember the numbers, I havent had enough coffee this morning. But Just buy the sensors install them and flash a gmstage 1 with hpt then tune on top.

 

^^^^ What he said, cost me around $100 with shipping, connectors and all.

Tuning on top of it now. 5.2 sec 60 - 100, 16.5* advance up top, NO KNOCK! yay!

Gotta tweak the STFT a bit more up top though.

 

yeah i was thinking why people where getting the whole gm stage 1 kit then spending more money on top of aftermarket tune, when it basicaly over writes the gm stage 1. its kinda retarded to get both, y not just get sensors and what not, then go get it tuned ur self. the tuner can get rid of learn down feature. and fine tune for everything else, a whole lot better then gm stage 1. thats if he's good. lol. it was boggeling my mind.

 

In the case of warranty, you can have a second ecu with your stage/HPT tuned on top of it to run and if something goes wrong, slap in you stock GMS1 flashed ECU and take it to the dealer. Then they wont ? the fact if they see anything in the ECU when they scan it.

Get us another shot where the graph is showing the highest boost so we can see the max RPM before boost drops off. There seems to be a pretty good drop in boost at the rpm you were showing. Your air temp is looking good BTW.

 

and look at it nose dive there too!!

 

Stock turbo dives to 18 psi at 6500 even pilled up. This is about 1 lb less but my 60 - 100 times are still faster than with the pill. HP Tuners still won't register over 255 kPa even with the 3 bar MAPs.

It makes 24 psi @ 3500 with my DAL tables where they are right now then tapers down to what you see.

Not going to go bigger turbo on a DD, sorry, BlueberryBoy!

Happy COTM, BTW!

 

yeah i know u can get another ecu, but it seems as though people are getting gms1 tune then getting another tune on top of it, same ecu. which is pointless. u know a good tuner can tune for maf, and tune out the learn down feature and every other thing they want.

 

It's not pointless, the stage 1 tune has upgraded fuel maps that can't be tuned by hpt and the use of 3 bar which can't be done with out the gm stage tune.

 

would this be any other gain on the stock turbo even if my turbine is at 100% efficiency and cant boost any more. i have the new boost tables so no boost drops and im at 23.5 psi. Vince said i cant go any more. will the 3 bar sensor help me out with tuning over it with trifecta.

 

I guess I don't understand what you mean by that.

Can you boost more? Yes. Cardelino18, for instance was boosting 30psi. It will drop off as you get up to the top end.

Is Vince saying you shouldn't... maybe. It's starting to seem that around 24-25 is the magic number. Many over 24psi* seem to be running into problems.

*On stock turbo

 

2.5 bar MAP can support just over 21 psi and 3 bar can support just over 28.

 

Vince and his software have control over the WG solenoid as well as other tables that us HPT guys do not have. Vince can also rescale the map sensors which we HPT guys cannot. So, our best bet is to get the sensors/connectors and flash the GMS1 for the added benefit of some 3 BAR map sensors, some changes with the fueling/WG solenoid and other beneficial changes.

So, to answer your question, no. You're "golden"