A turbo upgrade kit for the Solstice GXP, SKY Redline, and HHR SS was designed by General Motors Performance Division engineers to get the most power possible out of the 2.0 Liter LNF Turbo engine (fig. 15).
This kit (p/n 19212670) increases performance from 260 hp and 260 ft-lbs to 290 hp and as much as 340 ft-lbs of torque, and will still retain the full factory warranty. The kit provides emission standards that accommodate the legal criteria in all 50 states, and will not affect the driveability of the vehicle in any way. Because of the different drivetrain combinations, there are several different calibrations with slightly different power outputs. The kit is described in detail at http://gmperformancedivision.com.
Initially, the kit will be available for 2007-09 Solstice GXP and SKY Redline and 2008-09 HHR SS. A kit in the works for the Cobalt SS will carry a different part number and will have different kit content. A new air cleaner and turbo inlet duct will be included.
KIT BENEFITS
|
|
Torque |
Horsepower |
|
Production |
260 lb-ft @ 5200 |
260 HP* @ 5200 |
|
Solstice/SKY (manual) |
340 lb-ft @ 3600 |
290 HP @ 5200 |
|
Solstice/SKY (automatic) |
325 lb-ft @ 3600 |
290 HP @ 5200 |
|
HHR SS (manual/automatic) |
315 lb-ft @ 4800 |
290 HP @ 5200 |
In addition to the increased torque and horsepower, the kit raises the maximum RPM to 6500 and also disables the "torque learn-down" feature of the ECM. In the programming of the factory ECM, torque learn-down constantly monitors engine torque and limits it to 260 lb-ft, even when non-factory-authorized torque increasing components are installed (such as air cleaners, exhaust systems, etc.).
The Solstice and SKY with manual transmission also get no-lift shift (HHR SS already has this) which permits holding the throttle open while the transmission is upshifted, for greater acceleration.
KIT CONTENTS
(fig. 16)
|
Part Numbers |
Quantity |
Item |
|
55206797 |
2 |
TMAP Sensor -- 3.0 bar |
|
11589015 |
1 |
Bolt |
|
12626998 |
2 |
O-ring -- TMAP sensor |
|
88988320 |
2 |
Connector -- pigtail |
|
12602863 |
1 |
Label -- Premium Fuel Only |
|
12626987 |
1 |
Label -- Emission Certification |
|
19212711 |
1 |
Instructions -- with serialized calibration number |
TIP: Some early kits may have been shipped without the Premium Fuel Only label and Emission Certification Label.
KIT INSTALLATION
Kit installation is simple (fig. 17).
Two sensors must be replaced, along with their wiring connectors and O-rings. And the ECM must be reprogrammed.
The MAP sensor in the intake manifold and the TMAP sensor in the duct between the intercooler and intake manifold are replaced with two new TMAP sensors. The fitting on the kit TMAP sensor is different from the OEM sensor and requires a different O-ring.
TIP: The O-rings in the kit are identical to the blue O-rings used on fuel injector tips.
TIP: On the HHR SS, it is necessary to modify the TMAP sensor before installing into the intercooler duct, following details in the instruction sheet.
Because the replacement sensors have different terminals than the originals, it's necessary to splice new connectors from the kit in place of the standard connectors (fig. 18).
TIP: When splicing the harness wires to the pigtails on the new connectors, carefully observe cavity locations and wire colors portrayed in the instruction sheet.
TIP: Use the splice sleeves included in the kit and use the proper crimping tool from the J-38125 terminal repair kit.
Reprogram the ECM using the serialized calibration number on the instruction sheet. Call TCSC for the VCI download. Install the Premium Fuel and Emission Certification labels.
TIP: The calibration number is good for one VCI download only.
TIP: Be sure to point out to the owner that premium fuel is required when the Turbo Kit is installed.
INSTALLATION ISSUES
TIP: Check SI for relevant bulletins. At the time of this printing, there are two known bulletins: PIP4551 and PIP4559.
No start -- most likely due to wires 1 and 3 crossed in the inlet duct TMAP sensor.
P2227 code set -- (1) The reprogramming may not have completed correctly. (2) The car may have been driven on the new sensors without reprogramming.
TIP: It takes 2 key cycles for code P2227 to set. Be sure to cycle the key at least twice before turning the vehicle over to the customer.
Sensor contacts the AC line on HHR -- bend AC line slightly.
P0236 code set -- (1) Only one sensor was replaced (on HHR SS, the TMAP on the inlet duct is difficult to access). (2) TMAP on inlet duct wired wrong (terminal 1 mistaken for terminal 4).
- Thanks to Bill Duncan
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