Not the smoothest engine over 6k
 

As much as I like my FRS, the engine is a little rough 6k-7.5k. That's where you need to keep it for the horsepower but I almost feel like I am tearing up the engine? Is it balanced well enough to handle extended 6k+ driving?

Is this just me getting used to a boxer after driving inline motors (BMW, Honda, Toyota) for years.

autocross and drifting.. the RPMs are pretty much always around 6k

What BMW, Honda or Toyota motors did you own that revved well above 6K? Above 7K?

Mine doesn't sound rough past 6k. It does have a mechanical sound, but I love the sound of it. How many miles do you have?

Sent from my Nexus 4

LOL are you serious? Honda has made many engine models that rev up to 8,000 or even 9,000 rpm. BMW makes many engines that rev up to 8,000, the M3 engines for example have had 8,000rpm redlines. And Toyota, the same thing - many high revving engines.

brb K20

The motor is pretty stout, IMO. Just use a really high quality motor oil (Eneos) and make sure the level is checked regularly. I take mine up to 7k+ several times a week. No ill effects.

FYI spoon b16s were known to get up to 11k.

6k I a relatively low red line compared to any "sporty" Japanese car from the 90s.

I loved my F20C. I misses it.

My wife's '00 Si (B16A2 I think it was) w/GReddy turbo kit regularly saw 8000-8200.

I think the FA20 feels and sounds great up there at 6.5-7.4k. I love it up there. :)

The OP owned that car?!? That's what I'm asking. What high revving motors he owned for comparison. Why is that so hard to understand?!?!?!???!!!!?????

The way I read your post was different from they way you intended it to be understood I guess.

I revved my k20z3 in my old Si to 8600rpm and I will admit that it felt a lot better than the boxer ever does when doing so.

Fair enough.

Boxer engines are renowned for their extremely low level of vibration due to their symmetrical design. They may generate a unique sound and resonance, but that is not roughness (unless your engine has an issue).

i take mine to 7450 every day :D

equal length headers, what you are feeling is resonance, when 2 waves of air meet they amplify the wave when going in the same direction.

you are feeling the resonance though the seemingly inexistent sound deadening this car has.

My last car i had it modified to run to 9800 rpms... sounded like it was going to blow up every time... even though i must have hit the fuel cutoff maybe... dunno 10,000 times... i had PPE equal length headers on my last car... ended up with the same result

This thread is full of WIN! The OP didn't even care to respond.

Wait, someone's complaining about the smoothness of a boxer at 6k RPM? Must not have driven any inline 4 engines recently...

Well, any car compared to a Yaris is going to feel rough. Everyone knows the Yaris is Toyota's leap into the future of vehicular refinement. /Sarcasm

I just hopped into my fx16 last week to run down the gas before taking it to a show. It reminded me of how nice that 4age revs. It is running a Exedy hyper single clutch & flywheel though, but still it's just great to get that thing screaming! My daily FRS just doesn't feel or sound the same, even though its faster and has more low end torque.

Same every time I drive it 7k.

Yaris is just what I resorted to in 2009 when clush for clunkers came out and I didn't like anything the auto manufacturers were making (no 240sx:lol:, its actually a dependable tough little car.

More dependable than the old BMW M6 I owned, but even at 180k miles its engine was very smooth to redline. I owned a lot of nice but well past there life expectancy cars in my youth. Had an Integra motor in a civic that would rev to 9k smooth as butter even though it had 200k miles on it. Even owned a 89 M3 that I sold cause of rust and high milage when I lived in Detroit (for $2500:brokenheart:.)

Never owned a boxer, neither Subaru nor porshe. I guess it is more of a resonance, the equal length manifold explains it. The 7.5k redline is sort of an odd spot, not really a revver and not a torque motor. Driving it I find, most of the power is in a narrow band between 5.5k and redline. The resonance had me worried I may be stressing the motor. But I think moving the redline to 8.5k would greatly improve this car, just don't know enough about boxer SB, understand the cam/valvetrain would need upgraded.

There are so many directions to take with this car.

Can't wait for a twin screw manifold SC kit, it would help this car tremendously, only needs 25-30% increase in HP-TQ starting at 3.5k to help 3rd gear, thats all this car needs, probably wouldn't even need an intercooler for me to be happy (All we have is 87,89, or 93 gas here.) So 93 octane an a modern efficient twin screw supercharger with 5psi boost would transform this car into a world class wonder. I guess I would want UEL headers to change that "resonance" to a rumble!

It may not sound smooth, but any engineer will tell you that the flat four is inherently balanced. An inline four is not.

Some Honda owners may disagree.

This. My M3 was very balanced and sounded like sex at 8k rpms

BMW 6's have to be the sweetest sounding and smoothest engines around.

isn't he talking about the 4 cylinder M3? unless I'm not following the convo properly...

Might be right, forgot the 90's era M3 was a 4. I owned a 91 318IS and it was very smooth but only had 118 hp.

Inline 4's need heavy harmonic dampers to make them smooth. Pancake engines don't.

Do boxer 4s have a harmonic balancer? Don't in line 4s need to have one?

Sent from my Nexus 4 using Tapatalk 2

Agreed! I miss that sound a lot, just not the maintenance bill ;)

How rude. It is obviously implied by the original poster that he shared his comparison of the other listed vehicles as having exceeded 6K RPM in those. That leaves everyone to think that you don't believe the listed makes could exceed 6K RPM. So I guess were all idiots. Thanks.

i know people who own the yaris right now with 200,000 miles on 'em! (2008)
i don't think they care "two shits" whether,or not it's a "refined" car!..just sayin'

Op had a valid point/concern and people resorted to being ****s about his Yaris. Sounds about right for the internet.

Not everything is a matter of opinion. Balance is about physics.

I was just messing around. I didn't mean any hard feelings, haha! One of my friends actually has a Yaris and it is a great little car (for the money). As long as you're a fellow FR-S/BRZ owner you're a good man in my book.

http://cdn.memegenerator.net/instanc...x/37167322.jpg

My 6000-7500 became a LOT more smooth around 10k miles or so.

I know what smooth is - my other engine is a 1JZGTE

Some Honda owners don't know their engine uses balance shafts..

Having owned 10 Hondas and 1 Acura I can attest to the smoothness of Honda 4 cylinder engines (balance shafts being irrelevant to the topic), but I'm not convinced the Subaru flat 4 is any smoother. My opinion.