S2000 Under The Hood S2000 Technical and Mechanical discussions.

Excessive engine braking?

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Old 02-11-2002, 11:01 AM
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mas
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Default Excessive engine braking?

I have 3000 miles on my 02 and I feel like there's too much engine braking - i.e. the moment I take my foot off the gas pedal the car wants to stop. This is specially obvious in 1st & 2nd gears but I can feel it even in 6th on normal higway driving. Is is normal and I just have to get used to it or what? Thx!
Old 02-11-2002, 11:04 AM
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I think what you are experiencing is normal. The drivetrain spins up and down much faster than most cars. Definately not "like your father's Oldsmobile." It takes time to be smooth on and off the gas. And if you see your passenger's head jerking back and forth constantly, that should give you some hint as to a need for being smoother.
Old 02-11-2002, 12:01 PM
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Also high compression engines provide more vacuum, thus engine braking.
Old 02-11-2002, 12:07 PM
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mas
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I'm not sure I understand what you guys are trying to say. Isn't it all controlled by the ECU via input from the MAP sensor, TPS & the IAC system etc. I mean, shouldn't it be able to control it to make it smooth?

Thanks!
Old 02-11-2002, 12:37 PM
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Did you have an automatic before the S2000? The torque converter in an automatic slips when you let of the gas so you don't get much engine braking. The S2000 does seem to have more engine braking then my old 5-speed integra, but I chalk that up to the stook's more powerful engine.
Old 02-11-2002, 01:17 PM
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mas
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Never owned an automatic :-) My previous car was a 98 prelude, 5 speed. At the kind of rpms I'm talking about (3K-4K), I think the prelude had pretty much the same power, if not more.

[QUOTE]Originally posted by 'smyroad
[B]Did you have an automatic before the S2000?
Old 02-11-2002, 01:47 PM
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Originally posted by RWD_RCKT
Also high compression engines provide more vacuum, thus engine braking.
Well, it wouldn't be vacuum that provides the engine braking - it's compression. If the air in the cylinder is compressed more tightly, it takes more force and if you're not adding gas, it's all pumping loss...
Old 02-11-2002, 01:56 PM
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[QUOTE]Originally posted by mas
[B]I'm not sure I understand what you guys are trying to say. Isn't it all controlled by the ECU via input from the MAP sensor, TPS & the IAC system etc.
Old 02-11-2002, 02:23 PM
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Very good explanation! I cay say I'm satisfied now :-)

Thanks!

[QUOTE]Originally posted by jguerdat
[B]

No.
Old 02-11-2002, 03:07 PM
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Along with the gearing is the high RPM too.


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