DTE Stage IV Performance Upgrade Package (results) - Cadillac V-Series - CTS-V, STS-V and XLR-V
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post #1 of 2 (permalink) Old 02-21-2005, 08:11 PM Thread Starter
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DTE Stage IV Performance Upgrade Package (results)

We have just finalized and completed the installation of our Stage IV performance upgrade package on our 2004 Cadillac CTS-V R&D vehicle. We are pleased with the results of this package in that the engineering goals of docile, stock-like drivability were achieved, while still providing good clean power all across the powerband under the factory redline umbrella of 6600 RPM.

Stage IV Performance Upgrade Package Includes:
- DTE custom ground hydraulic roller camshaft specifically engineered for this vehicle platform
- Double roller 3-peice timing set
- DTE ported engine oil pump w/ PRV modification upgrade
- U/D pulley w/ matching A/C and main serpantine belts
- GM harmonic balancer crank bolt
- HD valve spring set
- HD hardened pushrod set
- DTE 160* engine coolant thermostat
- NGK V-groove sparkplug set
- Open-element cold air kit
- Stainless Works stainless steel long-tube header set
- DTE stainless steel lead pipes w/ high-flow, metal-matrix catalytic converters
- Corsa performance exhaust system
- DTE stainless steel AFR sensor bung/plug kit
- AC/Delco engine oil filter
- Mobil 1 synthetic engine oil
- Chassis dyno power output reports before and after upgrades
- DTE custom performance PCM calibration
- Custom DTE fender/engine cover badging
- Professional installation

Refinements Include:
- Compatible with 91 and 93 octane fuels
- 2004 and 2005 model year applications
- CAGS deleted electronically (removes function AND turns off annoying dash light all at once)
- Quicker wide open throttle activation
- Reduced engine operating temperature range from O.E.
- No A/C drag when WOT is selected and A/C is on (You now don't have to turn off the A/C to get maximum power at WOT)
- 27-29 MPG fuel economy
- ZERO detonation
- Accurate fuel and spark curves
- Emission compliant (Fed. only at this time)
- Removel of annoying backfire on shifts and during deceleration
- Speed limiter removel
- Increased power EVERYWHERE in the engine's powerband

Drivability Characteristics:
- Exhaust note carries just a *hint* of muscular gallup at idle (just enough to let everyone know that this car is NOT stock)
- Nice subdued rumble sound at idle outside the car (the type of exhaust note you would expect from a Caddy like this)
- No unwanted increased noise inside of the cabin (other than what you would normally hear with the addition of the Corsa system when mated to stock iron manifolds and cats)
- Absolutely NO interior drone of ANY kind, at ANY RPM in the passenger cabin at part-throttle, mid-throttle or cruising
- A very nice exhaust note/sing at WOT (un-obtrusive both inside and outside of the car and it makes the kind of sound that doesn't attract the police, but clearly lets others know that the car is NOT stock)
- Idle speed nearly stock and smooth
- Absolutely PERFECT~ stock-type drivability in ALL ambient conditions, in ALL cases
- Excellent fuel economy
- Drives a completely stock vehicle until you step into the throttle
- Instantaneous reaction to throttle increases at ALL engine RPM
- Absolutely NO negative side effects of using an under drive pulley with a vehicle such as this with the potential of high electrical accessory load. Charging system maintained a comfortable 13.6 volts at idle with every single O.E. electrical item turned on inside and outside the car.
- No increased, unwanted valvtrain noise

Power Improvements:
All of the power this performance package produces, does so under the stock engine RPM redline umbrella to enhance long-term engine durability and low-speed torque. Below are some figures we've documented from those tests 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. Original baseline power output remained the same as always for comparison accuracy. All control conditions varied by about 1% +/- throughout the testing session. Three pulls were made for each respective change for accuracy and the highest of the three was recorded.

Our custom PCM calibration which is used in tandem with these components, is written in-house using engine operating data obtained from the chassis dyno and from extensively driving the car in real-world conditions that would commonly be found in every day, go to work/in-town/cruising-type driving.

Dyno Cell and Vehicle Control Conditions:
Ambient Temp- 43.4*
Intake Air Temperature: 73.7*
Absolute Barometric Pressure- 29.27 in./Hg
Vapor pressure- 0.120 in./Hg.
Rear Tire Rollout Ratio- 49.05 RPM/MPH
SAE Correction Factor- .96
Rear Tire Pressure- 35 psi
Engine/Drivetrain Temp.- 176*
Vehicle Mileage- 9411.0

Baseline-100% Stock:
340.6 RWHP/338.6 RWTQ

DTE Stage IV Performance Upgrade Package:
395.6 RWHP/388.9 RWTQ

55 RWHP/50 RWTQ Gain Over Stock!

Dyno Graph
Click Here

We actually had the power level over 400 RWHP at one point, but found that detonation would occur in the extreme heat at that calibration level w/ 91 octane fuel, so we backed it down a bit in an effort to provide you with a sound, trouble-free performance upgrade that would NOT negatively affect engine durability over time.

This performance upgrade package can be installed here in-house at DTE or it can be purchased as a DIY performance component kit that includes the necessary DTE PCM calibration for a trouble-free installation at home. More details will follow on this later.

Happy motoring folks and please give us a call with any questions/comments!


Last edited by Dynotech Engineering; 02-22-2005 at 12:06 PM.
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post #2 of 2 (permalink) Old 02-22-2005, 12:07 PM Thread Starter
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Chassis dyno graph added.

Best Regards,
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