[Jamesons Viggen]

Originally Posted by Seagull

How do you interpret the ratios? I should dig up my dyno chart somewhere. I didn't understand that when I was shooting the breeze hanging out. I think mine said something like AEM Air was 15.52 whatever that means.

There is an ideal AFR, called stoich, google it. I think stoich is like 14.7:1 parts of are/fuel. So you can be on the other side of it, running lean(more air), or running rich(more fuel).

In general, it is safer to run rich than too lean as lean can make things go boom.

[Seagull]

Originally Posted by Jamesons Viggen

There is an ideal AFR, called stoich, google it. I think stoich is like 14.7:1 parts of are/fuel. So you can be on the other side of it, running lean(more air), or running rich(more fuel).

In general, it is safer to run rich than too lean as lean can make things go boom.

Ahhhh Chemistry, how I missed you....( Rings a very small distant bell ).

Okay so I'm prob running 3.5% lean.

[Jamesons Viggen]

Originally Posted by Seagull

Ahhhh Chemistry, how I missed you....( Rings a very small distant bell ).

Okay so I'm prob running 3.5% lean.

Engines typically are not tuned to run stoich from idle to redline, that is the art of powertrain tuning. There are points where a bit lean can make more power, and parts that you want rich to protect the engine. It's an art-to tune an engine just right.


http://en.wikipedia.org/wiki/Air%E2%80%93fuel_ratio

[300hp]

Originally Posted by Seagull

What do you think it is for an e92 M3?

I hope I did not come off as if I was saying the 335i is now an M3.

I have no idea what the M3 dynos, it can only be better i presume

Do BMW engines take long to fully break in, I swear it feels like my car is pulling harder now.

[Seagull]

Originally Posted by 300hp

I hope I did not come off as if I was saying the 335i is now an M3.

I have no idea what the M3 dynos, it can only be better i presume

Do BMW engines take long to fully break in, I swear it feels like my car is pulling harder now.

No you did not. I imagine its now that 1/2 step between m3 and 335i.

Yeah, I wonder what my car will feel like in 6 months from now and 2 oil changes. I remember all my old bimmers getting more and more fuel efficient as well. That reminds me, I better book one now...

[300hp]

Originally Posted by Seagull

No you did not. I imagine its now that 1/2 step between m3 and 335i.

Yeah, I wonder what my car will feel like in 6 months from now and 2 oil changes. I remember all my old bimmers getting more and more fuel efficient as well. That reminds me, I better book one now...

I am glad it's not just in my head. This car just amazes me every time I drive it hard. Yeah man set up the oil change, I have 6 months on mine and I think I will do the same, I need to get my tires checked, they have nitrogen so I will just let the dealership handle this

[Husbardo]

I finally went for the post-MPPK dyno run.

Unfortunately, it was again a hot day but I suppose that's good for comparison to my pre-MPPK numbers. They got better results after wetting down the intercoolers again; however, the numbers are surprising to me and until I hear from more experienced guys on here I'm assuming it was somehow operator error. (It was a different tech performing it this time and he found my car "has way too many buttons.") Any constructive feedback or insight is appreciated...

Car: 2013 335i M Sport Line / Pkg
Trans: Sport Automatic w/Shift Paddle
Fuel: Shell V-Power (93 Octane)
Dyno: DynoJet Model 424xLC2

Date: 5-16-13 / 6-11-13
Modification: Stock / MPPK
Mileage: 1850 / 2600
Temp: 95.29F / 92.26F
Humidity: 12% / 21%
Max HP: 271.63 / 272.30
Max Torque: 260.00 / 278.18

[Husbardo]

Here's the printout:

[FotiosF90M5]

Originally Posted by Husbardo

I finally went for the post-MPPK dyno run.

Unfortunately, it was again a hot day but I suppose that's good for comparison to my pre-MPPK numbers. They got better results after wetting down the intercoolers again; however, the numbers are surprising to me and until I hear from more experienced guys on here I'm assuming it was somehow operator error. (It was a different tech performing it this time and he found my car "has way too many buttons.") Any constructive feedback or insight is appreciated...

Car: 2013 335i M Sport Line / Pkg
Trans: Sport Automatic w/Shift Paddle
Fuel: Shell V-Power (93 Octane)
Dyno: DynoJet Model 424xLC2

Date: 5-16-13 / 6-11-13
Modification: Stock / MPPK
Mileage: 1850 / 2600
Temp: 95.29F / 92.26F
Humidity: 12% / 21%
Max HP: 271.63 / 272.30
Max Torque: 260.00 / 278.18

Not even a full 1whp increase? My car felt as powerful as it did with a JB stage 1. Obviously something's not right. My butt dyno says a bit over 300whp and 320 wtq.

[The Nerd]

Originally Posted by fotios335i

Not even a full 1whp increase? My car felt as powerful as it did with a JB stage 1. Obviously something's not right. My butt dyno says a bit over 300whp and 320 wtq.

Don't shoot me for saying this....but could it be throttle sensitivity makes the MPPK "feel" faster? One of my original skepticisms months ago...

[Waterbelly]

Originally Posted by The Nerd

Don't shoot me for saying this....but could it be throttle sensitivity makes the MPPK "feel" faster? One of my original skepticisms months ago...

No need to be shot. That is exactly what BMW has done - changed the throttle response so most people "think" the car is faster earlier in the pedal throw. Not saying there is not any increase in power, but 99% of folks commenting on "butt dyno" are really just noticing the throttle response.

It's like golf manufacturers saying their new clubs are longer: its because a new 5 iron is the same length and loft as your old 4 iron. Just changed the number on the bottom, and you think you've magically gained distance!

BTW - before you bash me, I have the PPK, M interior, M exhasut, etc., etc. and I love my car. I love it more with the PPK. But that is really because I like the new throttle mapping (particularly in comfort mode). I feel that every time I drive. The frequency that I might actually use/feel an extra 20 horses? Not much...

Cheers,
Matt

[Jamesons Viggen]

Originally Posted by Husbardo

I finally went for the post-MPPK dyno run.

Unfortunately, it was again a hot day but I suppose that's good for comparison to my pre-MPPK numbers. They got better results after wetting down the intercoolers again; however, the numbers are surprising to me and until I hear from more experienced guys on here I'm assuming it was somehow operator error. (It was a different tech performing it this time and he found my car "has way too many buttons.") Any constructive feedback or insight is appreciated...

Car: 2013 335i M Sport Line / Pkg
Trans: Sport Automatic w/Shift Paddle
Fuel: Shell V-Power (93 Octane)
Dyno: DynoJet Model 424xLC2

Date: 5-16-13 / 6-11-13
Modification: Stock / MPPK
Mileage: 1850 / 2600
Temp: 95.29F / 92.26F
Humidity: 12% / 21%
Max HP: 271.63 / 272.30
Max Torque: 260.00 / 278.18

That looks oddly low for a Dynojet. Your stock WHP looks fine, your stock tq a bit low. Your tuned numbers look off as well.

[tdizzle]

Originally Posted by Jamesons Viggen

That looks oddly low for a Dynojet. Your stock WHP looks fine, your stock tq a bit low. Your tuned numbers look off as well.

What he said. I'd have expected your stock tq to be at least as much as what your tuned tq is showing.

Something is fishy.

[F30form]

I would say that the dyno operator did not calibrate correctly. There is certainly something off.

[ybbiz34]

Numbers look strange to me.

[Seagull]

Originally Posted by tojo_m

those who have done their dyno (or are going to), could you'll post the actual graph of the power/torque ? The area under the curve is much more useful than stating just peak numbers.

Okay, dug mine out finally! What does this tell you? Is the drop off as expected? What's awesome? What's not so awesome?

Other data:
66.38 F
29.88 in-Hg
Humidity 19%
Gas 91

[FotiosF90M5]

Originally Posted by Waterbelly

No need to be shot. That is exactly what BMW has done - changed the throttle response so most people "think" the car is faster earlier in the pedal throw. Not saying there is not any increase in power, but 99% of folks commenting on "butt dyno" are really just noticing the throttle response.

It's like golf manufacturers saying their new clubs are longer: its because a new 5 iron is the same length and loft as your old 4 iron. Just changed the number on the bottom, and you think you've magically gained distance!

BTW - before you bash me, I have the PPK, M interior, M exhasut, etc., etc. and I love my car. I love it more with the PPK. But that is really because I like the new throttle mapping (particularly in comfort mode). I feel that every time I drive. The frequency that I might actually use/feel an extra 20 horses? Not much...

Cheers,
Matt

The see saw effect when getting on and off boost is much stronger. Pulls you back in your seat a lot harder and car squats more when accelerating. My boost ranges from 10 up to 12 psi. It even gets past 13 psi at times during sustained WOT from 1st gear up to 3rd gear. Floor it from 1st gear and get up to about 110mph during that time it goes into rapid fire shifting. Hit the peak boost button and I've seen up to 13.4 psi. Lets see a stock one do that. C,mon people you really think BMW would blatantly lie to all its customers?? The mppk is real and its just as strong as other aftermarket tunes only much more thorough. Not just throttle sensitivity. This isn't a sprint booster lol.

[tdizzle]

Originally Posted by Seagull

Okay, dug mine out finally! What does this tell you? Is the drop off as expected? What's awesome? What's not so awesome?

Other data:
66.38 F
29.88 in-Hg
Humidity 19%
Gas 91

That's what I expected to see. Maybe expected a bit more hp/tq but not much more. Looks good.

[rallybull]

Originally Posted by Seagull

Okay, dug mine out finally! What does this tell you? Is the drop off as expected? What's awesome? What's not so awesome?

Other data:
66.38 F
29.88 in-Hg
Humidity 19%
Gas 91

wow! that is a peak 370 lbft torque. No wonder the car pulls like someone kicked it from behind!!

It is nice that the curve is still smooth as in stock and we are getting the peak torque (or close to it) for a wide band of rpms (from 2700 to about 5000). Looks like we need to shift around 6500rpm for max acceleration.

[TreDirtyFive]

based off literature an 8AT car /w the PPK should net roughly 18whp and almost 30wtq but I am sure it makes a touch more (not bad)...but absolutely not the mind-bending power that everyone seems to be touting. My JB4 Stg. 2 on map 1 (12.5psi) feels much stronger and actually smoother than my workmate's PPK but he has some more pronounced and sensitive tip-in on cruise that could seemingly feel like more power? But when you go WOT it is not even a comparison. My JB4 is set on 50% lagfix (wastegate position) since I wanted a little more natural and linear pedal feel without too much lag and I think it's perfect.

Nothing to discredit the PPK, though, as it definitely feels meatier than stock in the middle and tip-in is improved but top end "feels" exactly the same as stock. I do lust for that engine cover and extra burble though! I do have to say, since I have the JB4 with the flex fuel connectors, that with 40% E85 this car is just a whole other beast and I don't have a DP either, which generally adds another 10+whp and 20+wtq as well as faster spool.

Please note my last car was a 135i N55 DCT /w FBO minus meth and my F30 "feels" just as fast...but let's be real because I'm 100% sure it isn't.

[Benjo6]

I didn't see the PPK as an available option for my new vehicle (I did do military sales though for US specs). I wonder if I can retro fit in Europe , and I'm also curious how it effects warranty since it didn't seem available at the time of purchase

[The Nerd]

Originally Posted by Seagull

Okay, dug mine out finally! What does this tell you? Is the drop off as expected? What's awesome? What's not so awesome?

Other data:
66.38 F
29.88 in-Hg
Humidity 19%
Gas 91

Seagull....our dynoed horsepowers were very similar (my 290 vs your 288), however, you had a great deal more torque than me (my 294 vs your 320). Regarding the torque....I understand different cars and different conditions can yield variances of 5, 10, maybe 15....but holy cow, you dynoed at 26 lb-ft peak torque more than my car! Could this be a difference in the type of dyno?? AWD vs RWD? It even looks like the temp was almost the same for our tests (my 68 vs your 66). I'm just baffled that our hp are so close, but there mysteriously seems to be something wrong with my torque. Any other plausible explanations? Did I just get a really weak torque-producing N55 from the factory?