Removing Secondary Throttle Blade - Yay or Nay?
#13
I paired the secondary throttle plate delete mod with my primary throttle plate ECU control spring delete mod.
The Ecu delays closing the primary throttle plate which reduces engine braking, and also holds the plate open for that irritating manic fast cold idle. Simply removing that spring frees the primary throttle plate from ALL ECU controls. The engine still cold starts and runs just fine because the cold mixture is still rich, it simply idles at the same 1,500 rpms as when the engine is hot..
Try it, you might like it. If you don't, it's easily reversabie.
I live in a canyon so all the asphalt I ride on is twisted. Having instant deceleration engine braking from an instantly fully closed primary throttle plate is a great help in cornering.
The Ecu delays closing the primary throttle plate which reduces engine braking, and also holds the plate open for that irritating manic fast cold idle. Simply removing that spring frees the primary throttle plate from ALL ECU controls. The engine still cold starts and runs just fine because the cold mixture is still rich, it simply idles at the same 1,500 rpms as when the engine is hot..
Try it, you might like it. If you don't, it's easily reversabie.
I live in a canyon so all the asphalt I ride on is twisted. Having instant deceleration engine braking from an instantly fully closed primary throttle plate is a great help in cornering.
Thanks!
dankly
#14
Removing the secondary throttle plate gets rid of that irritating 7,000 rpm "dip" in the dyno chart, because the ECU holds the plate halfway open and only opens fully above 7,000 rpms. Here's a dyno run I did testing the custom exhaust before that mod.
This mod also works well paired with the ECU primary throttle plate control spring delete.
#15
Serious question, when you're accelerating under wide-open throttle, at what RPM do you usually upshift in each gear?
#16
#18
Maybe not so, new car models are coming out without throttle plates at all as crazy as it sounds. Completely open to atmosphere and controlled by the fuel management system completely. I kind of like the plate but that's progress.
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