Yamahhr

I started the NEW TO TURBO thread and still negotiating price on it with the Chevy dealer... so I don’t have the car yet...
but ive been trying to educate myself and I’ve leared here about GM turbo upgrade.
My understanding is it’s just a tune flash.
But it will bump up the HP and torque to 300+... now that sounds good! Lol

My question is:

1. Is there a way to be able to tell ,by looking at the engine, the SS I’m looking at has it?
I think I read somewhere that the upgrade comes with a Bosch sensors with BLUE LABEL or something like that...

2. Can the stock internals in engine and tranny handle the increased power & torque?? I thought GM “detained” it got automatic SS, for reliability of the tranny...

i know its an $500+ (more like $700?) add on to the car and I wanted to go back to check it out myself....

thank you!

Oldblue

Yes the sensors would be blue Bosch , here’s 136 posts for your reading

https://www.chevyhhr.net/forums/sear...y=GMTU+upgrade

Yamahhr

thank you!

i love this forum although I don’t even have an HHR “yet”.

RJ_RS_SS_350

Here is a link to a pic of the upper TMAP sensor, with the blue bosch label. This engine has the GMTU. As I understand it though, it may be difficult to find a dealer to do it anymore, as it is so old.
https://www.chevyhhr.net/forums/atta...sch-sensor.jpg

There is no way for us to know if the engine in the car you're looking at can handle it. You would need to have it gone over with a mechanic knowledgeable about turbocharged ecotec engines.

Oldblue

Here’s that picture

BLKHHRSS

I considered getting the Stage1 upgrade recently and my dealer was still aware of this and expressed no issues being able to do the job, although the cost was up there.

I ended up getting a custom tune for less than 1/3rd the cost and didn't have to change any parts, and it puts out the same numbers.

DrLoch

If you got a tune that puts out the same power without changing the sensors. Your gonna want to get acquainted with ZZP. The stock sensors are 2 bars.

celblazer

2 bar maps only read to 14.7psi anything above that for boost has the tables skewed to work. So not totally accurate. But tends to be ok. 3 bar reads up to 29.4psi so can be tuned more accurately. All about keeping the motor safe at higher boost levels.