[auf Deutsch]

Originally Posted by BruceM

So you want to size the turbo to allow for decent low-end torque for driveability but sufficient top-end power.

Different drivers will have different takes on the optimum size and design of the turbo. Dinan's judgment in this regard has usually been pretty conservative, but overall good, in my view.

I would imagine the Pure S2 turbo makes crazy top end numbers (500 WHP with supporting mods) but suffers substantial turbo lag down low. Dinan maintains DD drivability by finding a happy medium between balls-out HP and dreaded lag. I understand that this is their model regarding aftermarket tuning. I'll reiterate, 400 WHP with a nice, smooth curve generating power all the way to redline is fine by me.

[No Boost]

Originally Posted by auf Deutsch

I would imagine the Pure S2 turbo makes crazy top end numbers (500 WHP with supporting mods) but suffers substantial turbo lag down low. Dinan maintains DD drivability by finding a happy medium between balls-out HP and dreaded lag. I understand that this is their model regarding aftermarket tuning. I'll reiterate, 400 WHP with a nice, smooth curve generating power all the way to redline is fine by me.

CH said he wanted more poke and brakes from the M2. Halfway there.

[serrated]

Can I get just the intake? I already have the MPE and it sounds awesome, so I just want an intake so I can hear some snail sounds. (but I don't want to void warranty and I don't want a stupid CEL)

The dealer is a Dinan dealer, so I guess I'd have to pay THEM to install it to avoid voiding warranty?

[Dinan_Engineering]

Originally Posted by serrated

Can I get just the intake? I already have the MPE and it sounds awesome, so I just want an intake so I can hear some snail sounds. (but I don't want to void warranty and I don't want a stupid CEL)

The dealer is a Dinan dealer, so I guess I'd have to pay THEM to install it to avoid voiding warranty?

You can just get the intake. You can install it yourself as well if you like. Pretty simple install. No matter the installer warranty would be applicable with the caveat that if not done by an authorized installer and a problem were to occur as a direct result of an improper installation it would not be warranted.

[Bee Pee]

Just added one of these to my EWG n55 c/w Dinan CAI.



because stock EWG inlet pipe is still sized to suit smaller PWG - photo below illustrates this quite well.



M2 uses same part # for its inlet pipe as earler PWG F2x and F3x cars

My feedback on page 3 of this thread and correlates well with OEM's dyno results on 1st page of the same thread.

Will Dinan by offering a similar upgrade - certainly works well with Dinan CAI on my car in that IAT's are down, throttle response is better and sounds naughtier on ~ 70% and above throttle esp in sport + mode !!!

[serrated]

Originally Posted by Dinan_Engineering

You can just get the intake. You can install it yourself as well if you like. Pretty simple install. No matter the installer warranty would be applicable with the caveat that if not done by an authorized installer and a problem were to occur as a direct result of an improper installation it would not be warranted.

Will I get a CEL with this intake?

[Dinan_Engineering]

Originally Posted by serrated

Will I get a CEL with this intake?

Haven't got one on our shop car or on any other M2 to date.

[No Boost]

Dinan_Engineering I need my weekly fix. Can you provide any stage 4 updates?

[Dinan_Engineering]

Originally Posted by Stage IV

Dinan_Engineering I need my weekly fix. Can you provide any stage 4 updates?

Shop M2 came back from a short local press run with no problems. Had some general maintenance done to it end of this week (new tires, oil, etc) and will be going up to the mountains early next week for some altitude testing but from all indications the thing is basically done. Basically M235i big turbo numbers. Peaks at 446/458 (crank). Only real difference is its a bit more torquey down low but pretty inconsequential in general terms. I imagine it will be publicly released in December sometime.

[mrcheezle19]

Originally Posted by Dinan_Engineering

Shop M2 came back from a short local press run with no problems. Had some general maintenance done to it end of this week (new tires, oil, etc) and will be going up to the mountains early next week for some altitude testing but from all indications the thing is basically done. Basically M235i big turbo numbers. Peaks at 446/458 (crank). Only real difference is its a bit more torquey down low but pretty inconsequential in general terms. I imagine it will be publicly released in December sometime.

Hmm Even though I figured this is where the power would end up, I was hoping for a bit more. Figured with the stronger rods and crank boost could have been turned up a bit more than on the normal m235i. Either way still solid numbers, will probably go this route.

[KSAF]

Can we have the intercooler in black color? I like the stealth look of a black intercooler.

[SeanWRT]

Originally Posted by Dinan_Engineering

Shop M2 came back from a short local press run with no problems. Had some general maintenance done to it end of this week (new tires, oil, etc) and will be going up to the mountains early next week for some altitude testing but from all indications the thing is basically done. Basically M235i big turbo numbers. Peaks at 446/458 (crank). Only real difference is its a bit more torquey down low but pretty inconsequential in general terms. I imagine it will be publicly released in December sometime.

Is it fine on AKI 91 at all? If so, how much less hp do we expect?

[mrcheezle19]

Also is it possible to run the big turbo upgrade on a mix of 91/e85 or will your tune not adjust for that?

[auf Deutsch]

Originally Posted by mrcheezle19

Hmm Even though I figured this is where the power would end up, I was hoping for a bit more. Figured with the stronger rods and crank boost could have been turned up a bit more than on the normal m235i. Either way still solid numbers, will probably go this route.

What are you talking about? This is 1HP/3TQ higher than the 235i

Seriously though, higher peak numbers are what ultimately sells tunes for most enthusiasts. I take a different approach. I want a smooth, progressive increase in power delivery over the entire RPM band. I'm hoping this Dinan setup will act like a super MPPK with minimal lag and redline fun. At the end of the day, ~400 WHP on a RWD street driven small car is sufficient. Look at all the complaints about the M3/4 being unable to get power down because of such high torque levels. Perhaps if the M2 were xdrive and by extension 150 lbs heavier, I'd want more. 446/458 should be good. Also keep in mind that Dinan measured the M2 N55 at 360 HP, 5 less than what BMW claims. The power delta is pretty substantial.

[Dinan_Engineering]

Originally Posted by KSAF

Can we have the intercooler in black color? I like the stealth look of a black intercooler.

Not likely. Paint chips. Powder coating kills the efficiency. Anodizing tends to fade with heat over time (become more purple).

Originally Posted by SeanWRT

Is it fine on AKI 91 at all? If so, how much less hp do we expect?

Will work on 91. ~20% less power then those running 93.

Originally Posted by mrcheezle19

Also is it possible to run the big turbo upgrade on a mix of 91/e85 or will your tune not adjust for that?

Possible, yes. The factory DME will still adjust a bit for octane and adjust timing accordingly so you will see some benefit from it but the tune will not be optimized for ethanol mixes. Meant to be a tune designed for average pump gas.

[mrcheezle19]

Originally Posted by Dinan_Engineering

Not likely. Paint chips. Powder coating kills the efficiency. Anodizing tends to fade with heat over time (become more purple).



Will work on 91. ~20% less power then those running 93.



Possible, yes. The factory DME will still adjust a bit for octane and adjust timing accordingly so you will see some benefit from it but the tune will not be optimized for ethanol mixes. Meant to be a tune designed for average pump gas.

Would that cause any issues down the line doing it that way? Referring to the 91/e85 mix

[Dinan_Engineering]

Originally Posted by mrcheezle19

Would that cause any issues down the line doing it that way? Referring to the 91/e85 mix

Never been a company that did anything with ethanol mixes or alternative fueling in general. Always opted for just higher octane gas when we wanted a boost so I really couldn't give you a real answer. We simply dont test for it.

[No Boost]

Our roadways may suck but I'm really glad PA carries 93. A ~20% decrease in power with 91 is unacceptable.

[SeanWRT]

Originally Posted by Stage IV

Our roadways may suck but I'm really glad PA carries 93. A ~20% decrease in power with 91 is unacceptable.

If I understand it correct, 20% less gain = 80*20% = 16 hp crank number. You'd be losing close to that using 91 with stock car.

[AYurch]

On a side note will you be having any Black Friday specials?

[BruceM]

Originally Posted by SeanWRT

If I understand it correct, 20% less gain = 80*20% = 16 hp crank number. You'd be losing close to that using 91 with stock car.

Yes, that makes sense. There is no way 2 points of octane should lead to a loss of 20% off 446 hp....

I have 92 in my state. If I lose 8, I figure I can make up much more than that with a simple catted downpipe.

[No Boost]

Originally Posted by SeanWRT

If I understand it correct, 20% less gain = 80*20% = 16 hp crank number. You'd be losing close to that using 91 with stock car.

Originally Posted by BruceM

Yes, that makes sense. There is no way 2 points of octane should lead to a loss of 20% off 446 hp....

I have 92 in my state. If I lose 8, I figure I can make up much more than that with a simple catted downpipe.

See what a few happy hour drinks will do. I initially read that as 20% of 446.

Wawa carries 92. I'll be driving a few extra miles to the Exxon station when the M2 arrives.