McRat
New member
- Joined
- Apr 23, 2006
- Messages
- 1,571
This is a charger that is a direct bolt in replacement for a GT42/45, and it does bolt up as advertised. So far, streetability is very good for a big charger. It is a 2.98 inducer, 5" intake, and T4 mount. Compressor wheel dias and turbine wheel dias are very close to GT4202 numbers. It is journal bearing and oil cooled and ungated. The PPE Dmax install kit for the GT42 is required for the install, and you will need to lose your EGR.
The compressor wheel is about 25% taller than the GT42 so the map appears to be wider going by seat of the pants. Where the GT42 gomes on with a rush, this comes on more gently. Slight lag is noticeable over the GT4202R most likely due to the journal bearing S400 vs the ball bearing GT. Freeway cruising at 80 mph is about 700-800 deg and 1 PSIG boost and 1.5 PSIG drive pressure. No tow testing yet, but it feels like a 6000lb trailer should be fine.
Track testing should be Friday (our normal track is closed for good). Power output appears to be in the OHSHIITE range so it's hard to tell without a dragstrip.
To the moderators, this is in the Drag section since it applies to all three trucks and it is a drag oriented charger. And there is almost zero traffic in GM Performance here. I do not sell these nor am I sponsored by Borg Warner (or anyone else). This is purely informational.
Test truck is a 2005 LLY 4x4 Duramax (6280lb) with:
PPE Dual Fueler
LLY engine with stock injectors and cam, LLY pistons have lips removed and ceramic coated by SoCalDiesel, rods are Crower, head studs ARP. This is my backup engine since my "good" engine is waiting parts.
4" exhaust
Edelbrock 1792
Allison transmission built by Mike L with Suncoast parts and ATS copilot.
The compressor wheel is about 25% taller than the GT42 so the map appears to be wider going by seat of the pants. Where the GT42 gomes on with a rush, this comes on more gently. Slight lag is noticeable over the GT4202R most likely due to the journal bearing S400 vs the ball bearing GT. Freeway cruising at 80 mph is about 700-800 deg and 1 PSIG boost and 1.5 PSIG drive pressure. No tow testing yet, but it feels like a 6000lb trailer should be fine.
Track testing should be Friday (our normal track is closed for good). Power output appears to be in the OHSHIITE range so it's hard to tell without a dragstrip.
To the moderators, this is in the Drag section since it applies to all three trucks and it is a drag oriented charger. And there is almost zero traffic in GM Performance here. I do not sell these nor am I sponsored by Borg Warner (or anyone else). This is purely informational.
Test truck is a 2005 LLY 4x4 Duramax (6280lb) with:
PPE Dual Fueler
LLY engine with stock injectors and cam, LLY pistons have lips removed and ceramic coated by SoCalDiesel, rods are Crower, head studs ARP. This is my backup engine since my "good" engine is waiting parts.
4" exhaust
Edelbrock 1792
Allison transmission built by Mike L with Suncoast parts and ATS copilot.
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