I have a problem with this in stop and go traffic. You go to put your foot on the gas from a stop (or near stop) and the car bogs and lurches and pretty much looks like you don't know how to drive stick. Only way to stop it is to clutch pedal back in and rev it high to "clean" out whatever is making the bogging occur.

It makes me look like a tool

 

i think most of its due to poor clutch work. when i get lazy, and dont give enough revs to the car when im in traffic or whatever, my car will bog, then shudder and lurch forward. when i give it more gas the car runs fine.

 

Through my experience that I'm trying to save some gas these day. That there is bog in the lower 2500rpm, but above that everything ok. I have bog "sometime" meaning I notice the throttle response and how you should feather the gas pedal. I mean there was time that I feather lightly the gas pedal and the car would go smoothly. But at night when the condition is cooler there would be like no bog at all since rich condensed air.

so in other word maybe it the AIR and feathering the gas pedal.

 

Bogging has nothing to do with the clutch, and can be experienced by:

Cruising in 6th, light ahead turns red, you slow down using the brake only, and leaving it in 6th gear. At about 15-20mph, the light turns green, and if you step on the gas without downshifting, you will bog.

 

Yeah, people are talking about two things here - rpm bog and hot air bog. CKit is talking about rpm bog - the S2000 engine doesn't have the displacement to make power at low rpms, thats why you stay in the higher rpms. S2k makes decent power from 3k on, while a V8 would typically be fine at 1k.

Bogging is bad because it puts serious strain on the cog teeth in the transmission - they have to push harder to move the wheels essentially, so they can break. Trying to push the car with rpms too low is like tryin to do a deadlift without bending your knees - lots of strain and very inefficient. The right gear is like the right muscle group - in this case, your legs, not your back.

 

Thanks Saki_GT, I can see the point BUT , the S2000 puts out much less torque when bogging, so the tranny should be safe. In a low end torque car (American musle car), or a turbo diesel, I could see an issue, but the S2000 simply has no power down in the lower RPMs.

Bogging (rpm bogging) in a mechanical sense is giving the engine more throttle than it can use. The engine can't turn faster to use the extra air/fuel because the transmission is holding it back. This causes a severe drop in engine vacuum, and even less power than if the right amount of throttle is used. But obviously from this thread, bogging is a term used to describe a few different things.

Anyone ever broke their transmission while bogging?

 

[QUOTE=__redruM,Aug 8 2007, 08:33 AM] Bogging (rpm bogging) in a mechanical sense is giving the engine more throttle than it can use.

 

[QUOTE=__redruM,Aug 8 2007, 12:33 PM] Thanks Saki_GT, I can see the point BUT , the S2000 puts out much less torque when bogging, so the tranny should be safe.

 

While we can all agree that bogging an engine is a bad driving habit, I can't see where it will cause real damage.
I won't go as far to saying bogging is 100% safe, because I haven't really done that much reading on the topic. But I would be interested in the outputs of a good s2ki search tool, should one exist.

 

^I'm beginning to wonder if certain people don't have the search link. Only 20% of the people on here use it. Anyway, bogging is a different issue for me. Anywhere below 5k RPM the engine almost feels like it's bogging. After that however, it picks up quite a bit stronger. Between the cams and the heat, I stalled my car for the first time pulling out of the gas station yesterday.