Just bought a S65 longblock to build my stroker

[catpat8000]

Originally Posted by coloradoe92m3

21 mpg on freeway

Doing great!

34 - cu feet interior volume, rear
55 - height of car with 4 flat tires, in inches
89 - mph at 8250 rpm redline in 3rd gear of DCT car
144 - ?

[Jive]

Originally Posted by catpat8000

Doing great!

34 - cu feet interior volume, rear
55 - height of car with 4 flat tires, in inches
89 - mph at 8250 rpm redline in 3rd gear of DCT car
144 - ?

144 - boner's per year from a 1-2 redline shift on S6

[swamp2]

Originally Posted by catpat8000

Doing great!

34 - cu feet interior volume, rear
55 - height of car with 4 flat tires, in inches
89 - mph at 8250 rpm redline in 3rd gear of DCT car
144 - ?

Redline is 8400... But this can be easily overlooked for getting the Fibonacci sequence on to m3post.com!

[catpat8000]

Originally Posted by swamp2

Redline is 8400... But this can be easily overlooked for getting the Fibonacci sequence on to m3post.com!

I knew you were going to say that But why does my M3 tach say the redline is 8250 rpm? And why does my car shift at an indicated 8250 rpm when in D5?

Where do you get 8400 rpm from?

[swamp2]

Originally Posted by catpat8000

...why does my M3 tach say the redline is 8250 rpm? And why does my car shift at an indicated 8250 rpm when in D5?

Where do you get 8400 rpm from?

Any decent magazine and all official BMW documentation such as these two. Mine shifts at 8400 or at least visually very close to it. However, dumping ECU data typically shows instances of 8500 rpm and even higher.

http://www.m3post.com/goodiesforyou/...nformation.pdf

[catpat8000]

Originally Posted by swamp2

Any decent magazine and all official BMW documentation such as these two. Mine shifts at 8400 or at least visually very close to it. However, dumping ECU data typically shows instances of 8500 rpm and even higher.

http://www.m3post.com/goodiesforyou/...nformation.pdf

That's a good doc, thanks for posting. I hadn't seen it before.

Page 18 has dyno graphs comparing the S65 and the S54 and I was reminded once again just how astonishingly flat the torque curve of the S65 engine really is.

[SenorFunkyPants]

Originally Posted by swamp2

http://www.m3post.com/goodiesforyou/...nformation.pdf

On a slightly different note...this early pdf doesn't mention "Efficient dynamics" - do you recall if early USA cars came with the ED system?

[Soorena]

Originally Posted by Jive

144 - boner's per year from a 1-2 redline shift on S6

233 - 4th gear's max speed in kph with 35-19 tires.

377 - the most distance in city you can go on one tank in km.

610 - the horsepower you get with G-Power SK-II SD supercharger.

987 - the horsepower you'd get if you swapped a Veyron engine in.

1597 - the number of the pains in the butt you'd get for the swap above.

[Yellow Snow]

Originally Posted by catpat8000

I knew you were going to say that But why does my M3 tach say the redline is 8250 rpm? And why does my car shift at an indicated 8250 rpm when in D5?

Where do you get 8400 rpm from?

S65 V8 is 8,400 redline. The S85 V10 has an 8,250 redline.

[swamp2]

Originally Posted by SenorFunkyPants

On a slightly different note...this early pdf doesn't mention "Efficient dynamics" - do you recall if early USA cars came with the ED system?

Pretty sure they got it in EU but we in NA did not. I believe there are thread(s) on this topic from back in the day.

[swamp2]

Originally Posted by catpat8000

Page 18 has dyno graphs comparing the S65 and the S54 and I was reminded once again just how astonishingly flat the torque curve of the S65 engine really is.

Absolutely. This is probably the largest achievement of the S65, if fares even better than some prestigious engines starting with the letter "F" in this regard. This too is something that one actually feels in a WOT run to redline.

[regular guy]

Originally Posted by Soorena

233 - 4th gear's max speed in kph with 35-19 tires.

377 - the most distance in city you can go on one tank in km.

610 - the horsepower you get with G-Power SK-II SD supercharger.

987 - the horsepower you'd get if you swapped a Veyron engine in.

1597 - the number of the pains in the butt you'd get for the swap above.

[catpat8000]

Originally Posted by regular guy

Here's what I have in my spreadsheet:

Stock rods+bolts: 621.5 g
Stock pistons: 487.0 g

Carrillo Rods+bolts: 536.5 g
Stroker pistons: 430.0 g

Are these stroker pistons 50 g lighter because they are low compression pistons and therefore have less material? Or because the forged aftermarket pistons are just lighter due to a different design?

Pat

[regular guy]

Originally Posted by catpat8000

Are these stroker pistons 50 g lighter because they are low compression pistons and therefore have less material? Or because the forged aftermarket pistons are just lighter due to a different design?

Pat

It's a combo of both. Even the 12:1 CR pistons are quite a bit lighter, but it will take some more digging for me to find the numbers.

[BMRLVR]

Originally Posted by catpat8000

Are these stroker pistons 50 g lighter because they are low compression pistons and therefore have less material? Or because the forged aftermarket pistons are just lighter due to a different design?

Pat

The pistons are the same ferroprint style piston actually by the OEM manufacturer (MAHLE) and are not aftermarket. Not sure on the lighter weight though...... 50 g is a lot of mass to save on a piston of 1mm larger diameter without some redesign.

Hopefully regular guy will have some more info!

[IMG]

Originally Posted by regular guy

It's a combo of both. Even the 12:1 CR pistons are quite a bit lighter, but it will take some more digging for me to find the numbers.

Start digging plz !

[regular guy]

Originally Posted by IMG

Start digging plz !

Argh. It might take a while; but I will try to get it.

[IMG]

Originally Posted by regular guy

Argh. It might take a while; but I will try to get it.

[kawasaki00]

Interested in cylinder head work, if so hit me up. Make you a deal you can't refuse.

[kawasaki00]

Originally Posted by regular guy

It's a combo of both. Even the 12:1 CR pistons are quite a bit lighter, but it will take some more digging for me to find the numbers.

If you want to make a real difference, change compression height and the ring package, glad to help.

[BMRLVR]

Originally Posted by kawasaki00

Interested in cylinder head work, if so hit me up. Make you a deal you can't refuse.

Very interested........ PM sent!