With the release of the 340lph DW300c fuel pump in 2015, it was quickly realized that the pump would be 100% drop-in fitment for the 2009-2015 Cadillac CTS-V. This presented an opportunity for DeatschWerks to perform in-car development and testing on our own 2011 CTS-V shop car. Having just completed some significant modifications and already running the 1000cc DW 16u-90 injectors, the DW CTS-V had everything needed, except the fuel pump solution, to make the switch to e85.
Existing pump upgrades available for the platform are overly expensive, complicated, and have significant issues with low fuel level conditions. DW knew the 300c held great promise in bringing a simple, cost effective pump solution to support the fuel delivery demands the majority of V owners required. With a goal of 700whp on e85 through its auto transmission, the pumps were installed, and the car was sent to Houston House of Power for e85 flex fuel conversion and tuning.
Due to camshaft and airflow limitations, the V ended up making 680rwhp on e85, fueled only by the 300c pumps and the 1000cc 16u-90 injectors, a combination totalling less than $1K. Data-logging showed peak IDC of less than 70% and rail pressure holding a strong 65psi through the entire power band. Further long term drivability testing proved the pumps installed in the V module were as quiet as OE, exhibited no hot or cold start issues, and most importantly, allowed full use of the OE fuel tank even when pushed beyond the low fuel light.
Plans are underway for a new cam, cylinder head work, and SC porting to reach an ultimate goal of 750whp on e85, all done solely with the DW300c pumps
DW Shop 2011 CTS-V Modification List:
- DW1000cc Injectors
- DW300c CTS-V Kit Fuel Pump Kit
- 4" Intake
- Tony Mamo Ported LS7 TB
- ZL1 SC Lid
- Texas Speed Cam
- Stainless Works Longtubes
- 2.44" Upper Pulley
- 9.1" Lower Pulley
- Front Mount HX
With the release of the new DW300c fuel pump kit for the LSA CTS-V earlier this year, we wanted to prove this new fueling solution on the 2011 DW CTS-V shop car with a goal of 750whp on E85. The first go around yielded 680whp on E85 but still had plenty of room left in the fuel system. After a cam change, along with some porting and polishing, 749whp was achieved with fuel pressure rock steady, and still some headroom left on the DW 16U-90lb injectors, proving that the DW300c fuel pump kit along with the injectors is by far the best solution on the market
- Port/polished Heads
- Ported/polished Supercharger
- Larger Texas Speed Cam
Alas, a fatal flaw for some of our customers was the CEL that was triggered due to the increased pump draw from the high flow 300c’s. You asked for a solution and we’ve been working hard to deliver one.
In collaboration with TorqByte, we have developed a hardware upgrade that solves the CEL issue. The upgrade is a cost-effective service that is performed on your OE FPCM and is available immediately through TorqByte. See links below for more details…