Vtec
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Originally Posted by kevo2k6
can u run a vtech engine without the ecu and juss a vtech controller? is does the ecu run vtech?
The hallmarks of all Acura engines are smoothness, low emissions, high power output per liter of displacement, lightness and impressive reliability. To achieve these aims, our engineers have developed a number of innovative patented systems. Among these is the Variable Valve Timing and Lift Electronic Control (VTEC™) system. This technology solves the age-old compromise between tuning an engine for peak torque or peak horsepower, and provides the best of both worlds. With VTEC, the engine delivers ample low-rpm torque and high-rpm power without sacrificing either, while delivering surprising fuel efficiency. Other engine features that bear out the legacy of Soichiro Honda are lightweight aluminum construction, overhead cams, and four valves per cylinder for maximum efficiency and outstanding performance. From the beginning, and for good reason, the engine has always been the heart and soul of the Acura automobile.
Last edited by qtiger; Apr 21, 2004 at 11:16 PM.
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i do want the ecu i was juss wonderin if u can use vtech without the comp because it is a possibility i might go carbed and bypass as much of the comp as i can. but i would love to be carbed and still have vtech.
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From: Madison, WI
You can run a VTEC motor without a VTEC ECU, assuming you have an RPM-operated switch to trigger the VTEC solenoid and some way to get enough fuel into the motor at high rpm.
One unique feature of the VTEC ECU is that VTEC engagement point is not totally fixed. It is a function of rpm and engine load. That means if you're crusing along the highway in a low-ish gear and not putting much of a load on the motor, it will stay out of VTEC but then if you floor the throttle it will switch to the high cams.
If you want to run it with carbs, then essentially the carbs will automatically correct for the increased airflow when the high-rpm cam profile comes on. Using an rpm-activated switch to trigger the VTEC solenoid instead of a VTEC ECU will give you a bit less precise control, but it can work.
One unique feature of the VTEC ECU is that VTEC engagement point is not totally fixed. It is a function of rpm and engine load. That means if you're crusing along the highway in a low-ish gear and not putting much of a load on the motor, it will stay out of VTEC but then if you floor the throttle it will switch to the high cams.
If you want to run it with carbs, then essentially the carbs will automatically correct for the increased airflow when the high-rpm cam profile comes on. Using an rpm-activated switch to trigger the VTEC solenoid instead of a VTEC ECU will give you a bit less precise control, but it can work.
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May 2, 2005 10:44 PM