Dynotech Engineering
10-19-04, 01:34 PM
As many of you know, we have been utilizing CTSVLS6's (Paul's) 2004 CTS-V for dyno testing evaluation of performance products for this vehicle, including DTE's own line of performance products and services specifically designed for this vehicle platform. We had the opportunity to thoroughly evaluate the new stainless steel exhaust system for the CTS-V from Corsa Performance.
The system that was sent to DTE from Corsa performance was the prototype version that they used on their own car and after talking with Corsa Performance, we've been informed that there are additional improvements and refinements that are going to be implemented into the actual production version of this system.
Our professional opinion of this system....
We found the fit and finish to be very good and the system bolted together very easily. The chromed outlet tips look very classy like they belong there and are of increased diameter, which adds to the muscular appearance of the car's rear end. There were some rattles of the exhaust pipes where they passed over the BMR sub-frame connector that is installed on this vehicle, but that issue was easily corrected by shimming the bar a bit lower for added pipe clearance.
There is absolutely NO interior exhaust note resonance at all and the exhaust sound that can be heard from inside is a pleasing, deep rumble during around-town driving that diminishes to near-stock quietness at cruising speeds. The exhaust note at WOT sounds very muscular and exotic inside the car and out, while not being too loud to where it attracts every police officer within a mile radius.
Below are some figures we've documented from those tests using this exhaust system in place and all subsequent dyno pulls were finalized on the same day, by myself personally, with the engine temps within 3* either way of the run preceding it. All control conditions varied by about 1% +/- throughout the testing session. This exhaust system was installed onto a completely stock 2004 CTS-V on top of our Stage I PCM Calibration Upgrade. The weather conditions for this test were poorer in comparison to the day the the PCM calibration upgrade was finalized as well. Three pulls were made for each respective change for accuracy and the highest of the three was recorded.
Dyno Cell and Vehicle Control Conditions:
Ambient temp- 60.9*
Absolute Barometric Pressure- 28.80 in./Hg
Vapor pressure- 0.20 in./Hg.
Rear Tire Rollout Ratio- 49.06 RPM/MPH
SAE Correction Factor- 1.01
Rear Tire Pressure- 32 psi
Engine/drivetrain temp.- 194*
Vehicle Mileage- 7387.0
Stock Vehicle w/ DTE Stage I Performance PCM Upgrade:
352.2 RWHP/347.3 RWTQ
Same as above with Corsa Performance CTS-V exhaust system installed:
352.6 RWHP/348.7 RWTQ
Overall in our professional opinion, this exhaust system is a very good upgrade for the CTS-V and the increased, muscular sound it produces is very stealth-like. Although it does not offer any significant power gains over the stock O.E. system, (at least not in stock engine trim with the system we had for testing) we feel that this system will show its true colors with increased exhaust gas flow and performance gains when the power output of the engine is increased in some fashion. Corsa Performance has claimed that they have measured an increase of approx. 10 RWHP with their production system on their test vehicle. These refinements claimed to have now been implemented for the production system may reflect that additional power increase, FYI.
Happy motoring! :)
Phil- DTE
The system that was sent to DTE from Corsa performance was the prototype version that they used on their own car and after talking with Corsa Performance, we've been informed that there are additional improvements and refinements that are going to be implemented into the actual production version of this system.
Our professional opinion of this system....
We found the fit and finish to be very good and the system bolted together very easily. The chromed outlet tips look very classy like they belong there and are of increased diameter, which adds to the muscular appearance of the car's rear end. There were some rattles of the exhaust pipes where they passed over the BMR sub-frame connector that is installed on this vehicle, but that issue was easily corrected by shimming the bar a bit lower for added pipe clearance.
There is absolutely NO interior exhaust note resonance at all and the exhaust sound that can be heard from inside is a pleasing, deep rumble during around-town driving that diminishes to near-stock quietness at cruising speeds. The exhaust note at WOT sounds very muscular and exotic inside the car and out, while not being too loud to where it attracts every police officer within a mile radius.
Below are some figures we've documented from those tests using this exhaust system in place and all subsequent dyno pulls were finalized on the same day, by myself personally, with the engine temps within 3* either way of the run preceding it. All control conditions varied by about 1% +/- throughout the testing session. This exhaust system was installed onto a completely stock 2004 CTS-V on top of our Stage I PCM Calibration Upgrade. The weather conditions for this test were poorer in comparison to the day the the PCM calibration upgrade was finalized as well. Three pulls were made for each respective change for accuracy and the highest of the three was recorded.
Dyno Cell and Vehicle Control Conditions:
Ambient temp- 60.9*
Absolute Barometric Pressure- 28.80 in./Hg
Vapor pressure- 0.20 in./Hg.
Rear Tire Rollout Ratio- 49.06 RPM/MPH
SAE Correction Factor- 1.01
Rear Tire Pressure- 32 psi
Engine/drivetrain temp.- 194*
Vehicle Mileage- 7387.0
Stock Vehicle w/ DTE Stage I Performance PCM Upgrade:
352.2 RWHP/347.3 RWTQ
Same as above with Corsa Performance CTS-V exhaust system installed:
352.6 RWHP/348.7 RWTQ
Overall in our professional opinion, this exhaust system is a very good upgrade for the CTS-V and the increased, muscular sound it produces is very stealth-like. Although it does not offer any significant power gains over the stock O.E. system, (at least not in stock engine trim with the system we had for testing) we feel that this system will show its true colors with increased exhaust gas flow and performance gains when the power output of the engine is increased in some fashion. Corsa Performance has claimed that they have measured an increase of approx. 10 RWHP with their production system on their test vehicle. These refinements claimed to have now been implemented for the production system may reflect that additional power increase, FYI.
Happy motoring! :)
Phil- DTE