2015 BMW M4 Coupe (F82) Official Specs, Wallpapers, Videos, Photos, Info

[Wolfinwolfsclothing]

Originally Posted by Jamesons Viggen

A bit of an exaggeration don't you think?

You know that 2.0L AMG engine making 355hp(177hp per liter) already has tunes and bolt ons for it. So the S55 is 140hp per liter.

It's going to be hell if all these tuned cars just blow up every 5K miles.

I too worry about how maxed this car is from the start. 18.1 psi is up there given the small turbos and small displacement.
The 335 was the same bore same stroke and same displacement which only put out 8 psi stock. So essentially the same motor given some changes is putting out more than twice what its little brother was, boost wise. I don't see people getting a lot more power with a tune on those small turbos without serious reliability issues. We saw the many many problems the 335s had (I has 2 335s that threw limps all the time with tunes). It just seems like there is a lot less on the table here. I for one know how Audi has cracked down on the tuning of their cars and see BMW doing much of the same. Honestly, if its a fast or faster than my bolt on e92 m3 dct, thats good enough for me. Id rather have it sound better than worry about a tune. Essentially this should be putting out 996 turbo numbers, which even though thats a 15 yr old car, is still fast by any standard. This car should be a low 12 car and perfectly fine with that.

[Jamesons Viggen]

I don't think anyone said the S55 will mirror the n54 in terms of room for tuning when you look at where the boost starts off compared to how low the n54 started off.

But I take issue with this idea that the S55 will allow for no further tuning and will somehow blow up every 5k.

Its hard for me to think of any production turbo engine that has not had room for gains from tuning, some more so than others of course.

Originally Posted by Wolfinwolfsclothing

I too worry about how maxed this car is from the start. 18.1 psi is up there given the small turbos and small displacement.
The 335 was the same bore same stroke and same displacement which only put out 8 psi stock. So essentially the same motor given some changes is putting out more than twice what its little brother was, boost wise. I don't see people getting a lot more power with a tune on those small turbos without serious reliability issues. We saw the many many problems the 335s had (I has 2 335s that threw limps all the time with tunes). It just seems like there is a lot less on the table here. I for one know how Audi has cracked down on the tuning of their cars and see BMW doing much of the same. Honestly, if its a fast or faster than my bolt on e92 m3 dct, thats good enough for me. Id rather have it sound better than worry about a tune. Essentially this should be putting out 996 turbo numbers, which even though thats a 15 yr old car, is still fast by any standard. This car should be a low 12 car and perfectly fine with that.

[Suave]

Originally Posted by Sedan_Clan

It's the auto-blip!

My Porsche Boxster S I gave up for the M4 did the same thing and it's awesome in spirited driving!

[Theride]

those seats are horrible. Otherwise give me the M4

[Wolfinwolfsclothing]

Originally Posted by Jamesons Viggen

I don't think anyone said the S55 will mirror the n54 in terms of room for tuning when you look at where the boost starts off compared to how low the n54 started off.

But I take issue with this idea that the S55 will allow for no further tuning and will somehow blow up every 5k.

Its hard for me to think of any production turbo engine that has not had room for gains from tuning, some more so than others of course.

I agree that saying it'll break every 5k miles is a bit hyperbolic, however, speaking based loosely on what we know, doesn't seem like theres as much on the table as people think. If people think they are just going to get a tune and downpipes and maybe 550-600 hp they're going to be seriously disappointed.
If you want a car that will make big big power easily this isn't going to be the car.

The most powerful turbo car hp/liter wise is the GT2 RS. That car has some massive turbos and is a 3.6 liter (620 hp). The f8x has neither the displacement that car has nor the size turbos. So making 600 or even 550 hp from a 3 liter with turbos that small, and making it reliably doesn't seem to add up to me.

Lets also not forget, the DCT has tq limits, and what about the limits of the cf driveshaft. Its so much more than just hp, but the ancillary parts that are affected as well.

[swamp2]

Originally Posted by Wolfinwolfsclothing

This car should be a low 12 car and perfectly fine with that.

Good comments. However, I think the car has a very good chance to put down some high 11s.

[Holset]

Love the finished cars nice looks and spec.

But im not a fan of the yellow and blue exterior colors on the released pics ,i think the cars are going to look better in a dark grey (Sparkling Graphite Metallic) or black color they shows the lines better.

[yemski]

Originally Posted by M3V8Cabrio

I find it insulting that a car of this caliber has Japanese engine components.

I find your ignorance insulting, you clearly don't know much about car components and where quality components come from.

[secono330ci]

Originally Posted by yemski

I find your ignorance insulting, you clearly don't know much about car components and where quality components come from.

+1

[GregW / Oregon]

Originally Posted by Jamesons Viggen

So you are on board with the exaggeration of blowing up every 5k miles if not left stock? Because that was what my reply was to.

No, I was merely pointing out the specific output achievable with an i4 can be more difficult with an I6.

[GregW / Oregon]

Originally Posted by yemski

I find your ignorance insulting, you clearly don't know much about car components and where quality components come from.

He probably has an iPhone with Chinese components, too.

[Jamesons Viggen]

Originally Posted by GregW / Oregon

No, I was merely pointing out the specific output achievable with an i4 can be more difficult with an I6.

I was giving an example to the every 5k blow up argument that a highly stressed engine making 26psi peak, 177hp per liter- already has tunes available. The S55 seems tame in comparison.

[bmwluvr24]

In my opinion, releasing the cars in the same color would take away their identities. It was quite intelligent to make them contrast so much. They both have unique character and it is more obvious with these color choices.

[MTROUBLE93]

My car sounds better... Just sayin

[Roki_014]

Originally Posted by JunkStory

+1

this shiny mustard color is burning my eyes. Otherwise this car is absolutely amazing and going to beat every other competitor out there.

Which competitor are you talking about the 35k mustang gt or the 50 k corvette, both of them together cost less than what this car will cost

[bmwluvr24]

Originally Posted by Roki_014

Which competitor are you talking about the 35k mustang gt or the 50 k corvette, both of them together cost less than what this car will cost

A fully loaded Z51 package Corvette runs $73k with no mark up. And maybe it's just me, but I think the Mustang GT does not stand a chance against the F80 or F82. Why are Mustangs even in the comparisons? That is like saying the Honda Civic SI is comparable to the Lotus Elise, just because some figures are the same. There is more to the equation than number matching. It was only something I found out recently after driving the shit out of my friends E92. Other cars in the same HP range did not give me the excited feeling that the M3 delivered. If this next car is above that level, then the Mustang talk will die down quickly.

[pruettfan]

Both the M3 and M4 look fantastic. I love the sculpting they have done on the body to shape it in the most efficient and effective way. It reminds me of some of the aero work done on a Formula One cars. The interior is really cool, love the seats and I really appreciate the fact that BWM made the M3 and M4 interiors unique to those cars rather than just using the 3 or 4 series components with a M logo on them. The level of performance and efficiency of these cars is really impressive. It is likely these cars will get over 30mpg on the freeway which is amazing given the performance. Love them both. I am three years away from being able to order mine. It is going to be a long 3 years

[leletyM3]

I like it more and more!! Time to save now!!

[solstice]

Originally Posted by Wolfinwolfsclothing

I agree that saying it'll break every 5k miles is a bit hyperbolic, however, speaking based loosely on what we know, doesn't seem like theres as much on the table as people think. If people think they are just going to get a tune and downpipes and maybe 550-600 hp they're going to be seriously disappointed.
If you want a car that will make big big power easily this isn't going to be the car.

The most powerful turbo car hp/liter wise is the GT2 RS. That car has some massive turbos and is a 3.6 liter (620 hp). The f8x has neither the displacement that car has nor the size turbos. So making 600 or even 550 hp from a 3 liter with turbos that small, and making it reliably doesn't seem to add up to me.

Lets also not forget, the DCT has tq limits, and what about the limits of the cf driveshaft. Its so much more than just hp, but the ancillary parts that are affected as well.

I suspect that 18 psi is close to max what you can run with 10.2:1 compression ratio on 93 octane. The combustion chamber pressure is built by compression and bost and when you reach self detonation it's game over. Sure you can keep retarding ignition but it's not efficient. The GT2 RS runs 23 psi at peak boost I think but it's compression ratio is only 9:1.

Here's some play with numbers to give an idea vs the GT2 RS

18psi x 10.2 = 183.6
23psi x 9 = 207

207 / 10.2 = 20.2

So maybe there is room for ~ 2 psi tune if the turbos can generate it.
( I realize this is over simplified and not mathematically or scientifically precise but it gives us some idea )

[Jay-K]

those seats are to die for!

[Wolfinwolfsclothing]

Originally Posted by solstice

I suspect that 18 psi is close to max what you can run with 10.2:1 compression ratio on 93 octane. The combustion chamber pressure is built by compression and bost and when you reach self detonation it's game over. Sure you can keep retarding ignition but it's not efficient. The GT2 RS runs 23 psi at peak boost I think but it's compression ratio is only 9:1.

Here's some play with numbers to give an idea vs the GT2 RS

18psi x 10.2 = 183.6
23psi x 9 = 207

207 / 10.2 = 20.2

So maybe there is room for ~ 2 psi tune if the turbos can generate it.
( I realize this is over simplified and not mathematically or scientifically precise but it gives us some idea )

I agree and good post. Theres still a lot to figure out but generally speaking I just don't think the f8x is going to have the ability to pull 75-100 hp from a tune like some people think. 2 psi (which seems true) isn't going to give you nearly that much power either if it can be done.

The GT2 RS still has a lot left on the table since the turbos are bigger and can push well more than they have stock especially seeing its a Mezger motor and compression isn't that high.

[amdmaxx]

Why is CD (coefficient of drag) .03 worse than E90/92?