Thoughts about 718 Engine Note?

[CJFusco]

Originally Posted by bobsven

Does anyone want to discuss reliability and maintenance of a turbo 4 versus a non turbo boxer 6 cylinder of similar HP?

I would think it would be too early to tell? Porsche hasn't made a turbocharged four in regular production since, what, 1989? And when was their last flat-four? The final 914?

I would think that any turbocharged engine would be more "stressed" than a naturally-aspirated one; I know from experience that they are always more complex and maintenance-intensive.

If we're talking reliability, though, one has to consider the IMS issues faced by the 996 and 986 engines, and, to a lesser extent, the 997s and 987s.

[afterburn 549]

They should not be more maintenance. However , Porsche has made some engineering mistakes in the past.
There are plenty of boosted 4cylinder cars on the market today with almost no notice as far as extra anything as far as maintenance .

[CJFusco]

Originally Posted by afterburn 549

They should not be more maintenance. However , Porsche has made some engineering mistakes in the past.
There are plenty of boosted 4cylinder cars on the market today with almost no notice as far as extra anything as far as maintenance .

Yes -- this is true. Although my experiences with turbocharged fours is thus:

I owned a 2009 Mini Cooper S, with the turbocharged 1.6 BMW engine. As I understand it, oil consumption was very high with these turbo engines. The timing chain tensioner was also regulated by the engine's oil pressure; if the engine was low on oil, the timing chain would get loose and rattle. Oil consumption was such that every few months, I would start to get a rattle on start-up, and that would be my signal that I needed to top off the oil (well before the light came on). Forgive me if I'm getting any of this wrong; this is how it was explained to me by the techs at New Country Motors in CT.

I also had a 1986 Porsche 951. That car was very maintenance-intensive, but that probably had more to do with my novice tuning attempts than anything relating to build quality.

[afterburn 549]

I do not want to get off subject here, like I said there are plenty of turbos running around with no problems .
There is no reason why they have to be finicky unless they are running at the end of the envelope.
Cars like the silly Geo Metro .
My Fiat Abarth has lots of problems , like a Vega or pinto. (doors, latches, crap) However it is a turbo, pumps out 18 lbs in stock form.
But zero problems with engine and related parts.
The Subaru seems to be pretty much trouble free.
So the little flat 4 can be trouble free..if the do not under do it.

[masraum]

Originally Posted by CJFusco

Lots of farts and burbles. It's possible that the driver isn't wringing the engine out the way we might with a naturally-aspirated flax-six, but then again, with turbos, he doesn't really need to.

Originally Posted by rcooled

The engine note is OK on acceleration, but I don't care for the popping on overrun.

You guys do realize that carbed cars used to create the popping sounds on over-run. Then computerized FI eliminated that because it could completely cut fuel, but people love it, so they have started injecting fuel back into the motor on over-run just to create that sound.

I think the 991 and 981 cars, or maybe just the S versions or the versions with sport exhaust or sport plus mode or something like that have started doing it again. Many folks like it and miss it.

Here's a 917 doing it

[masraum]

Originally Posted by fastfredracing

The artificial engine noise that they pump into the cockpit will make it sound just fine from the inside .

I don't think Porsche is doing any of the artificial (made by the stereo) noise. I think that's just BMW. I think Porsche is just engineering ways for you to hear the sound of the engine more intensely in the cockpit (ducting the sound in).

But I could be wrong.

[CJFusco]

Originally Posted by masraum

You guys do realize that carbed cars used to create the popping sounds on over-run. Then computerized FI eliminated that because it could completely cut fuel, but people love it, so they have started injecting fuel back into the motor on over-run just to create that sound.

I think the 991 and 981 cars, or maybe just the S versions or the versions with sport exhaust or sport plus mode or something like that have started doing it again. Many folks like it and miss it.

Again: I think you're misunderstanding me. Maybe I shouldn't have mentioned the burbles next to the farts. I LIKE the burbling on over-run; yes, I know that most high-performance Porsches have them. I like it when my Cayman S does it, and I liked it when my 951 did it. What I meant (and perhaps didn't communicate well enough) is that the engine note on the 718 ITSELF sounds somewhat farty. At least it does in that video; maybe it will be much better in person (I hope?).

[GWN7]

It sounds ok I guess but I really like the sound of this one: Watch Chevrolet's COPO Camaro disappear in wheelies and tire smoke - Roadshow

[onewhippedpuppy]

Originally Posted by javadog

You should spend some time in a 991 turbo. They've made a bunch of progress since yours was built.

JR

I have no doubt. But it still doesn't change my previous comment.

[Brando]

It's... Meh. Sounds like a stock STI with a muffler on the BOV.

I agree with other comments above - there is a world of modders looking at the opportunity here.

[Deschodt]

I'm on the fence on that one. I've owned 2 boxsters and CaymanS over the years.

On the one hand they have always been annoyingly low on torque (every day drivability), on the other hand, the engine sound from 6000 to 7200 RPM was absolutely fantastic.

The 718 (I hate having to call it that, cheap marketing tie-up) will fix the torque and lose the scream. I've had other cars that "fart" like an S4 / Mini Cooper in sports mode.... It's fun for a while but I prefer the high RPM scream... We'll see... The Boxster/718 is very pretty - I cannot wait to see the new Cayman !

[porsche4life]

CJ you are forgetting that Porshe won LeMans with a turbo flat four last year! They know how to crank some power out of one!

[masraum]

Originally Posted by Deschodt

I'm on the fence on that one. I've owned 2 boxsters and CaymanS over the years.

On the one hand they have always been annoyingly low on torque (every day drivability), on the other hand, the engine sound from 6000 to 7200 RPM was absolutely fantastic.

Not mine, 3.4L 300hp, feels pretty good on the low end, and is even better as the revs climb.

[Deschodt]

Originally Posted by masraum

Not mine, 3.4L 300hp, feels pretty good on the low end, and is even better as the revs climb.

It's what you know and are used to I guess... I loved my Cayman S but I always found the gas pedal calibration was odd, and 260 lb-ft of torque was nothing to write home about... Especially when you have grown accustomed to 330 or so.... That chassis can take so much more, such a nicely balanced car... I'm glad to hear the torque is bumped up significantly in the 718, but yeah, I liked the sound of the flat 6 more ! We'll see/hear when it's out in person !

[Brando]

Put me in the "on the fence" camp for the CS. A 3.4L engine should have great responsiveness and torque across the whole RPM range. It is obvious there is some 'de-tuning' in place to keep it from passing the flagship. This is where a little bit of modification (intake/exhaust) and an ECU flash make all the difference. My CS handles like a dream with PASM/Sport. I know there's room for improvement, but for a stock car it's superb.

Originally Posted by Deschodt

It's what you know and are used to I guess... I loved my Cayman S but I always found the gas pedal calibration was odd, and 260 lb-ft of torque was nothing to write home about... Especially when you have grown accustomed to 330 or so.... That chassis can take so much more, such a nicely balanced car... I'm glad to hear the torque is bumped up significantly in the 718, but yeah, I liked the sound of the flat 6 more ! We'll see/hear when it's out in person !

[AFC-911]

Originally Posted by porsche4life

CJ you are forgetting that Porshe won LeMans with a turbo flat four last year! They know how to crank some power out of one!

V4 Turbo, actually.

[scottmandue]

Do they really think a four cylinder mid engine Porsche would sell? That is just crazy talk!

[masraum]

Originally Posted by Deschodt

I always found the gas pedal calibration was odd

That's why I like having the sport button. It recalibrates the gas pedal to be what to me feels more linear. The normal calibration feels like it's progressive, long initially and then gets shorter as you get deeper in.

[javadog]

I hated that feature in mine. I'd much rather have a linear relationship.

JR

[rattlsnak]

Have to remember it's a stock exhaust, but it still doesn't sound quite right. In the video when he upshifts at/near redline it sounds like the motor is only revving about 2,500-3000 RPMs, but the tach says otherwise. Nah, don't like it at all. The V-12 video was AWESOME!