2.0t Boost in Cluster
 

So I got the SS cluster and had White Auto reprogram it...and unlock the boost feature.

So far it doesn't seem to be working, anyone know what needs to be done so it actually reads the boost pressure?

No idea. Out of curiosity, what did you pay for the SS cluster and the programming?

I did same thing and boost gauge worked for me with no issues.

What did you buy, a '17 enhanced LT cluster? I have been interested in doing this but wasnt sure if I needed enhanced LT or the SS cluster.

Bought the cluster for 159 off a SS on Ebay. Chris from White Auto charges 349 for the programming, and the harness I got from GEN5DIY for 175

Guess I'll email Chris and see if he can help, thanks for the info. I got a second error with it, when I was driving it seemed to think the hood was open and started beeping...popped the hood and closed, so my sensor may have gone out which sucks haha

I bought an SS cluster off of Ebay

Just checked cluster. How did you get boost gauge there ? It’s usually battery gauge.

When I had him program I specifically asked him to put Boost gauge on there and unlock it

So we're going from an SS with boost? to a LS with boost? or what wouldn't it be a ZL1 that has the SC?? or is it more obvious that I just don't see.... All I am saying is, even in hp tuner scanner- turbo boost for our car is a calculated metric. I gotta think its MAP minus absolute pressure, so manifold swings positive and negative is that a negative scale in there? of is it turbo model that has this? - if I am seeing that right in 18 there was one favor of LS. fun to see a result. for me... my steering wheel would block the gauges ... :( but it seems like a fun tweak if it can work..

Doesn't the "2LT" cluster have the boost guage?

I am wondering what was done at the harness, was there a harness in there for it? I was thinking of a work around but I have to think there isn't any user aux on the ucu if there is someone pipe up. maybe this is all moot and there's simply a feature code somewhere. Look at adapting an aftermarket manifold pressure system?

So it's an SS cluster, but he reprogrammed it to my VIN and added the boost option. I'm not sure how it's calculated but instead of having an external gauge I was hoping to get it within the cluster. White auto is currently looking to see if there is a workaround to get it to work


So I believe that is what he's doing with the SS cluster, reprogrammed it to have the 2LT boost gauge unlocked...I could be wrong though

For the harness the only thing I did was use the Gen5DIY Harness to keep the radio controls on my steering wheel, and so that it can communicate with the radio

just fyi - there was a good discussion here
https://www.camaro6.com/forums/showthread.php?t=482302
which was a while ago, noone seemed to post a final resolution.
and this
https://www.camaro6.com/forums/showthread.php?t=474735


from here - its really impossible to be able to even suggest anything useful until someone can send up details of the gauge if its analog (works from actual hose pressure from the intake manifold, or is only tapped into the harness (digital). For anybody who's tracking, also curious if the BCM may be the processor pathway.

I just bought a ZL1 Cluster awaiting to receive the part so I can get WAMC to program it and stuff...

My assumption would be for a custom program setup it might be a bit tricky to get the boost gauge working

Now the only thing I can suggest trying is hooking up HPT to make sure you're able to even see your boost just to make sure all sensors are working after that talk to WAMC and see if they can assist?

"boost" is working. but this guage is gauging manifold pressure. It is slightly different than just positive boost from the turbo. You have to imagine the 0 point at 9 o'clock is air pressure at sea level, so that is really about 14.7 psi. In the manifold, there are times when engine suction exceeds the pressure from the turbo and will show a vacuum. on NA cars all you get is vacuum in the manifold. in HPT its a calculated "UserMath" result. Not to say there isnt something on board the car to do that, but in HPT it is calculated.
Someone needs to get with a GM tech that knows this area cause its very specific to a small amout of cars i think someone said one of the premium addon pkgs. If there was a tube connector on the back of it this would be a good telling. Then all you have to do is connect it to the manifold is best, but somewhere on the charge pipe could work just for show, but throttle plate comes in to play, and that messes it up becuase you want whats in the actual manifold.

I think it would read somewhere around -7 to 16 or so I forget I will look at it later, maybe post my logger. my positive turbo peak "boost" is around 18. from memory, I will double check. I know this goes away from solving the problem though sorry about that, cant be mch help until someone gets one of these buggers in their hands.

wookwook, would you mind sharing your math for boost in HPT? I see a few channels related to the turbo bypass valve and pressure, but none seem to be actual boost pressure...

I will just riff on what I have so far, hopefully its close to a good answer.

On this chart - the pressures all pretty much track the same, so
depending on how you wanted to use them for tracking effects of changes like CAI or DP they would react the same. The sensor pressures are MAF, MAP, Absolute (in psi), and 2 are derived, Manifold psi is a User math senso wanted to use them for tracking effects of changes like CAI or DP they would react the same. The sensor pressures are MAF, MAP, Absolute (in psi), and 2 are derived, Manifold psi is a User math sensor here, and the last one is Boost/Vacuum, which I believe is ECU derived. But in the end they all tell the same story. Manifold pressure will go negative reflecting transient suction in the manifold. the last one 'Turbo boost' is the classical positive only gauge that most people think of as turbo pressure in the intake hose that doesn't go negative at all, there's always at least a little pressure in the intake tube. So in transient if the throttle plate shuts down, there's potential for a little negative pressure in the manifold, but that's referring to 14.7 psi absolute psi as zero.r here, and the last one is Boost/Vacuum, which I believe is ECU derived. But in the end they all tell the same story. Manifold pressure will go negative reflecting transient suction in the manifold. the last one 'Turbo boost' is the classical positive only gauge that most people think of as turbo pressure in the intake hose that doesn't go negative at all, there's always at least a little pressure in the intake tube. So in transient if the throttle plate shuts down, there's potential for a little negative pressure in the manifold, but that's referring to 14.7 psi absolute psi as zero.


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But that really isnt the coolest thing. The cyl air mass and VE which can go into the 1900's is really the story, we get about 92 percent volume efficiency which is really good for a production car. Over 100 percent is really the stuff of rocket science.

Absolute manifold pressure is what ya wanna look at. Depending on your OS, and beta or non BETA HPT version, you may or may not have to subtract 14.7... Or just create a custom math for your particular situation, and be done. (<----Easiest way)

yes- cooper that is correct. after I thought about it for a sec after I posted it, the PIDs are misnomered. I actually knew that but when I posted I did'nt clarify. The blue one is the map minus measured baro pressure. In HPT there is a boost/vacuum PID that one would assume is manifold abs pressure but its just derived positive boost. I am seeing you really have to figure out what the OS is mapping, and not assume anything. Thanks!

i.e. the car is a rolling weather station, lol.

also.. fwiw, the rambling paragraph looks like the edit spliced itself....sorry about that. the pressures all generally track the same is what I was saying. it was a long day.
\W.

I also see I used pressure ratio... I will fix it. Attention to detail wookster....

Thanks guys! This conversation was way informative. I’m just getting started with logging via HPT and it’s easy to get lost in all the channels and chart series.

its been a big learning curve. i was the kid who did all auto tech in highschool. so i am bascially learning all over again but its been a good ride so far. don't neglect learning the histogram section. if ur going to eventually work the hp tuner thats where the tabled chart data resides. for a suggestion- look at AFR tuning demos, (basic CAI tuning) see if you can find any HPAcadeny freebies on utube. our car has a built in wideband. thats about where im at.

as a personal observation, you can road tune if you have access to long steady
on ramp. also avoids standing heat soak. and if dont mind doing it over a period of time making small ajustments.