Cruising regularly at 4000 rpm

[Tcoat]

Originally Posted by Jordanwolf

Gotta agree with this key statement here, "How does the car feel sluggish when cruising", that really just don't make sense lol. You cruising, not mashing the gas pedal.

That is great if you just get to cruise and don't have to accelerate quickly. I know that many think they have superhuman reflexes and "will just downshift" if they need to speed up suddenly but in an emergency situation they may not have the 1/2 second that could take. Cruising at anything below about 2,000 will indeed make the car sluggish if you try to accelerate.

[Tcoat]

Originally Posted by ermax

Exactly. It’s really very simple. If you’re in top gear at high speeds then you can’t avoid the high revs. I’m just pointing out that 4500 at just 35mph while “cruising” is just unnecessary wear.

Agreed that it is unnecessary and your mileage will suck big time. Disagree that you are creating any level of "extra wear". The ideal cruising revs for these cars is in the 3,000 to 3,500 range. You still have the power to accelerate quickly, there is no risk of lugging and it is right in the range to get the best mileage.

[radroach]

Doing a 5 hr trip through Alabama on some of their smooth highway, had radio cranked and I was turning 4th gear without realizing it for awhile, looked down and I was near 5k rpm. Damn this engine can be smooth.

[humfrz]

Originally Posted by Vic4uf

A smashed soda can worked even better

Reminds me of the time, last year, when my younger brother was visiting. He was acting "unsettled" so, mrs humfrz took him down to the Pot Shop, on the reservation and the Chief fixed him up with some stuff called "black widow".

When he got home, he asked me for a empty soda can. I gave him one and he smashed the side of it, punched a small hole in the indent and started a fire with his black widow stuff ...... then sucked on the opening of the soda can. That settled him down.




humfrz

[humfrz]

Originally Posted by new2subaru

Just 2?

Dang hot rod .......


humfrz

[PetrolioBenzina]

Originally Posted by StraightOuttaCanadaEh

at 4000 rpm your engine is spinning faster than at 2000 rpm, hence the extra wear from going faster vs going slower. More heat, more friction, more wear, no? That'd be my guess

I just assume that Subaru would have that handled, or else redline would be 2k. Extra wear would be spending all day bouncing off the rev-limiter. I'm sure they took into account they were designing and building a car that would be driven with some enthusiasm.

Originally Posted by humfrz

Would you buy ..... extra wear per mile, for a car driven at an engine speed of 4,000 rpm vs. 2,000 rpm ......??

humfrz

AKA normal operation. Extra wear would be knowing it spent it's life on a track, FI, lowered, owned by a moron. I'm sure you have a list as well.

Originally Posted by ermax

Exactly. It’s really very simple. If you’re in top gear at high speeds then you can’t avoid the high revs. I’m just pointing out that 4500 at just 35mph while “cruising” is just unnecessary wear.

AKA normal wear. I must have missed the post about cruising at 35 at 4500, but 4500 RPM is 4500 RPM regardless of speed. I'll continue to use whatever RPM is appropriate at the time and not worry about it.

Some of you should stop driving your car, it's wearing out.

[ermax]

Originally Posted by Tcoat

Nope. Although that would seem logical it doesn't work that way. As revs increase so does lubrication and cooling. Your engine makes up for the change and for all intents and purposes it still is at the same levels as long as you are within the engineered operating range. Yes some things will "wear" faster through the extra fuel flow required but this difference would be very small. Yes if you are driving for a long period at red line or are rapidly changing revs you are adding wear since it is outside of the designed specs for cruising.

If anything cruising at too low of revs (there was somebody here that swore cruising at 1,000 whenever possible was best) can be harder on an engine than 4,000 since it would lug and lose oil pressure every time you tried to accelerate.

Dang really? I’m never going to shift until I hit redline going forward.

Anyways, there is absolutely no way you can tell me there is no extra wear at all what so ever at 4K vs 2k. Regardless of extra oiling.

[Tcoat]

Originally Posted by ermax

Dang really? I’m never going to shift until I hit redline going forward.

Anyways, there is absolutely no way you can tell me there is no extra wear at all what so ever at 4K vs 2k. Regardless of extra oiling.

Engines wear. If operated within their design specs that wear is normal not "extra". When operated outside of their design specs the wear is extra. Simple concept. The difference in wear from running low RPMs as opposed to middle would be minuscule and worrying about it is silly. Don't lug it all the time and don't drive at red line for hours on end and the wear will be perfectly normal.

[humfrz]

So, allow me to ask a question.

You have two identical 86s, you are going to drive both for 100,000 miles at 60 MPH.

On one car, the revs will be kept at 2,000 rpms.

On the other car, the revs will be kept at 4,000 rpms.

At the end of the experiment, your tear the engines down and inspect for wear.

Which one will show the most wear ...... or will they be the same .....??




humfrz

[Audio]

Originally Posted by humfrz

So, allow me to ask a question.

You have two identical 86s, you are going to drive both for 100,000 miles at 60 MPH.

On one car, the revs will be kept at 2,000 rpms.

On the other car, the revs will be kept at 4,000 rpms.

At the end of the experiment, your tear the engines down and inspect for wear.

Which one will show the most wear ...... or will they be the same .....??




humfrz

Well if your going 60 mph at 4000 rpm... what's that 4th gear?? Yikes....

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[humfrz]

Originally Posted by Audio

Well if your going 60 mph at 4000 rpm... what's that 4th gear?? Yikes....

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Could be ....... some like it ...... hot .......

Please don't get hung up on the numbers, it's the relative difference that I'm asking about ......


humfrz

[Tcoat]

Originally Posted by humfrz

So, allow me to ask a question.

You have two identical 86s, you are going to drive both for 100,000 miles at 60 MPH.

On one car, the revs will be kept at 2,000 rpms.

On the other car, the revs will be kept at 4,000 rpms.

At the end of the experiment, your tear the engines down and inspect for wear.

Which one will show the most wear ...... or will they be the same .....??




humfrz

The difference if any at all the would be so minor that you would not be able to see it.

The numbers look like it should be different but the engine does not care if it is doing 2,000 rpms or 4,000.

[ermax]

Originally Posted by Tcoat

Engines wear. If operated within their design specs that wear is normal not "extra". When operated outside of their design specs the wear is extra. Simple concept. The difference in wear from running low RPMs as opposed to middle would be minuscule and worrying about it is silly. Don't lug it all the time and don't drive at red line for hours on end and the wear will be perfectly normal.

The auto “lugs” in your eyes then. I guess Subaru should have collaborated with you before writing the shifting logic. I know the difference in wear is minimal. But why turn 4500 in the neighborhood just because it is within specs? This is driving 101.

Anyways, this conversation is redundant at this point.

[ermax]

Originally Posted by Audio

Well if your going 60 mph at 4000 rpm... what's that 4th gear?? Yikes....

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My thought exactly. But apparently people do it all day long. People say it sounds cooler and they are ready to accelerate in an emergency. You know like if someone gets sick of you hogging the left hand lane and decides to try to pass you in the right lane. I mean you have to be ready for an emergency like that. You can’t let someone pass you on the right. Right? Hahaha

IMO the car sounds like ass at 4K. Resonates like it’s ready to throw a rod through the block. 4K in an S2000 sounds cool. Not on the FA20 though.