TEST 1 – COBB ACCESSPORT & COBB BOOST PILL
The COBB Boost Pill restricts the vacuum flow to the wastegate actuator, allowing the system to develop higher boost pressures. The COBB AccessPORT was used to fine-tune the ECU tables for the increase in boost pressure.
[pullquote]300 WHP
315 LB-FT TQ[/pullquote]
TEST 2 – COSWORTH INTAKE
The COBB Boost Pill restricts the vacuum flow to the wastegate actuator, allowing the system to develop higher boost pressures. The COBB AccessPORT was used to fine-tune the ECU tables for the increase in boost pressure.
[pullquote]309 WHP
321 LB-FT TQ[/pullquote]
TEST 3 – TOMEI POWERED EXPREME TI EXHAUST
The COBB Boost Pill restricts the vacuum flow to the wastegate actuator, allowing the system to develop higher boost pressures. The COBB AccessPORT was used to fine-tune the ECU tables for the increase in boost pressure.
[pullquote]328 WHP
328 LB-FT TQ[/pullquote]
TEST 4 – TOMEI POWERED TITANIUM CAT STRAIGHT PIPE
The COBB Boost Pill restricts the vacuum flow to the wastegate actuator, allowing the system to develop higher boost pressures. The COBB AccessPORT was used to fine-tune the ECU tables for the increase in boost pressure.
[pullquote]335WHP
337 LB-FT TQ[/pullquote]
The Bottom Line
| HP Level | HP Increase | % Increase | Total | |
|---|---|---|---|---|
| BASELINE | 264 | – | – | – |
| COBB AP + Boost Pill | 300 | 36 | 13.6% | 36 |
| Cosworth Intake | 309 | 9 | 3.0% | 45 |
| TOMEI POWERED Expreme Ti Exhaust | 328 | 19 | 6.1% | 64 |
| TOMEI POWERED Titanium Straight Pipe | 335 | 7 | 2.1% | 71 |
| FINAL POWER | 335 | – | 24.8% | 71 |
PARTS LIST (DOES NOT INCLUDE DYNO TUNING)
| COBB AccessPORT | $ 595.00 | |||
| COBB Boost Pill | $ 18.00 | |||
| Cosworth Intake | $ 339.00 | |||
| TOMEI POWERED Expreme Ti Exhaust | $ 1,290.00 | |||
| TOMEI POWERED Titanium Straight Pipe | $ 390.00 | |||
| MSRP Total | $ 2,632.00 | |||
| DSPORT Street Price: | $ 2,106 – $ 2,237 | |||
BASICS HANDLED
With the tuning solution in place, the maximum boost level that the factory bypass valve was determined to be able to hold was approximately 27 psi. Further quests for reliable and consistent horsepower gains above these levels should require at least the replacement of the factory bypass valve to allow higher boost pressures to be reached without the factory valve bleeding off excess pressure. With the basic intake and exhaust system components in place and tuned for maximum power output, our 71 whp increase and additional 45 lb-ft of torque should definitely motivate our EVO to faster levels. A side benefit of the titanium components is a respectable weight savings that reduce the load on the engine, allowing it to perform more efficiently than the horsepower and torque numbers alone would suggest.
In our next installment, we look toward further increasing intake efficiency by addressing the charge air temperatures and boost pressure losses that might occur with the factory rubber intercooler hoses and the factory boost bypass valve. We will also continue to maximize power output potential of each product by fine-tuning our fuel and ignition tables with the AccessPORT unit. Stay tuned.