Throttle Closing Response
Thread Starter
Burning Brakes
Joined: Aug 2000
Posts: 1,132
Likes: 1
From: Morganton, NC, USA
Throttle Closing Response
I'd like to hear comparisons from those who have driven a 6-speed F-Body with an LS1 and a 6-speed C5. My impression of the C5 is that the engine RPM's fall off very little when you lift the throttle to up-shift. Now the big difference between the two LS1's is that the F-Bodies have a typical cable and return spring arrangement while the C5 throttle blade is controlled by a small electric motor goverened by the gas pedal (drive by wire). So, my thought is the C5's throttle blades to not snap shut like the F-Bodies. Has anyone else noticed this? :crazy:
Le Mans Master
Joined: Dec 2003
Posts: 5,561
Likes: 447
From: Atlanta metro Ga.
Re: Throttle Closing Response (2kbluestreak)
Just an educated guess (although I suppose if I motivated myself I could probably find a definitive answer in the factory manuals..) but I would assume that a gradual closing throttle, independent of your right foot, would be good for emissions. It makes sense to me that abruptly shutting down the throttle could allow un-burnt fuel to pass through without sufficient oxygen to mix with. And since our cars' throttle plate is controlled by the PCM, it's easy to manipulate. :cheers:
Burning Brakes
Joined: Apr 2001
Posts: 773
Likes: 107
From: NC
Re: Throttle Closing Response (2kbluestreak)
Do you think it might just be the way the computer is programmed? I traded my 94 automatic for an 04 automatic a few months ago. One of the first things I noticed was that the new one tends to hold RPMs. I could launch the 94 hard and then suddenly back off and it would immediately shift and drop the RPMs. The 04 holds the RPMs very high for several seconds after I back off and then shifts. I don't like it, but I am getting used to it.
I don't know if this applies, but it sounds like a similar issue.
I don't know if this applies, but it sounds like a similar issue.
