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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning Confirmation of M235 Stock Numbers with JB4

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      03-07-2017, 09:09 PM   #23
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Bryan,

Don't get me wrong. I was about to say M2 doesn't make 380~390WHP with the mods you listed (IC/DP) and wanted but forgot to attach a dyno as below. In addition, the statement of m235i dinan stage 3 being equivalent to m2 stock came right from Dinan themselves. The point I was trying to make has always been that Dinan Stage 3 makes far less than 380~390WHP.

From multiple reports, with 93AKI, m2 stock puts down 335WHP on average (BMS made 330 on 91) and m235i 305WHP on dynojet. A 30WHP gap for Dinan stage 3 to close sounds about just right.

Let's just say M235i Dinan Stage 3 makes 340WHP. I don't think a switch to JB4 + a DP will net you another 40~50WHP.

Flash tunes have potential to get you there but that has to be with port injection. With just DP/IC, flash won't make noticeable differences power wise.

Am I making sense here?

Quote:
Originally Posted by bryan_f22 View Post
this is all 93. WHP. Dinan is crank numbers.

A stock m2 makes 325 whp on 93, do your homework before making claims.


From dinan website "F87 M2: 383 HP, 411 lb-ft of torque." Crank... so its 337whp. How is that same as a 235 with mods?

A stage 4 big turbo Dinan m2 will only make 400whp, with a DP maybe 415whp.

Actually only 380whp, see below:
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Last edited by SeanWRT; 03-07-2017 at 09:36 PM..
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      03-07-2017, 09:48 PM   #24
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Guys.... You are trying to compare American PonyPower with EU/Asian HorsePower - it will never work. Do a 100 to 200 kmh time if you want any chance of comparing power over the internet.
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      03-08-2017, 08:37 AM   #25
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a m235 dinan stage 3 is about 370whp. add a DP and you will be 390-395 as shown in my dyno sheets.

to be fair, a DP is good for 15whp, and a Dinan sport or jb+, is good for 20whp or 2mph trap or .2 on the qtr mi time on top of a flash tune. This is all proven.


There is no way that m2 on a dinan stage 1 is 400whp when as you see in the video a stage 4 with exhaust is only 380.
That graph also shows a horrible tq curve. there is nothing up top.
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      03-08-2017, 09:18 AM   #26
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Quote:
Originally Posted by bryan_f22 View Post
a m235 dinan stage 3 is about 370whp. add a DP and you will be 390-395 as shown in my dyno sheets.

to be fair, a DP is good for 15whp, and a Dinan sport or jb+, is good for 20whp or 2mph trap or .2 on the qtr mi time on top of a flash tune. This is all proven.


There is no way that m2 on a dinan stage 1 is 400whp when as you see in the video a stage 4 with exhaust is only 380.
That graph also shows a horrible tq curve. there is nothing up top.
Probably I shouldn't waste my time posting here, but I just can't help it.

Again, look closer please, it's 360whp and 400wtq. I've been always the one that's less ambitious than the most on m2 power. It's you that's too optimistic about m235i...Can't you just see that?

In addition, to be fair torque curve on that m2 dyno is beautiful enough for a piggyback tune that cranks up boost (some 18psi) early on.
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      03-08-2017, 05:14 PM   #27
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Quote:
Originally Posted by bryan_f22 View Post
a m235 dinan stage 3 is about 370whp. add a DP and you will be 390-395 as shown in my dyno sheets.

to be fair, a DP is good for 15whp, and a Dinan sport or jb+, is good for 20whp or 2mph trap or .2 on the qtr mi time on top of a flash tune. This is all proven.

There is no way that m2 on a dinan stage 1 is 400whp when as you see in the video a stage 4 with exhaust is only 380.
That graph also shows a horrible tq curve. there is nothing up top.

I would agree. I've research the crap out of dyno plots (all the various dyno machines) for stock and modded M235s, M240s, 335s (MPPK N55), and M2s. My findings match what's said above. I'm seriously considering Dinan Stage 2 and from what I've seen, that's consistently in the 350whp-ish range with a DP, around 370-380whp.

Everything I've read points to the M2 essentially being a "Stage 1" MPPK equipped N55 with some additional engine mods to make for more reliable track work. 330whp/360wtq on the Dynojet is pretty consistent with the M2s. So, figure about 20-25whp and 30-35wtq over a stock M235.

What is interesting to me are the 6MT M2 mag times vs the 6MT M235 times. The 6MT M235 seems to post consistent 13.4@107mph. However, the M2 6MTs have shown as strong as 12.7@111mph (same publication and a comparison test between the two cars). It's hard for me to see how 25whp/35wtq is resulting in a whopping 4mph in the 1/4 mile. Perhaps the M2's overboost function is coming into play and we're not seeing it on the dynos.
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      03-08-2017, 05:42 PM   #28
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I'm seriously considering Dinan Stage 2 and from what I've seen, that's consistently in the 350whp-ish range with a DP, around 370-380whp.


Just get a flash tune with bm3.

Its going to be cheaper than Dinan and net more power, with bm3 you can put the stock map back on when you go to the dealer.

I was dinan stage 3 and lost all that money on when i switched over to flash tunes and only sold dinantronics for 600$.
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      03-08-2017, 07:02 PM   #29
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Quote:
Originally Posted by bryan_f22 View Post
Its going to be cheaper than Dinan and net more power, with bm3 you can put the stock map back on when you go to the dealer.

I was dinan stage 3 and lost all that money on when i switched over to flash tunes and only sold dinantronics for 600$.
Curious did you compare back to back Dinan Stage 3 with flash tune on SAME mods, maybe a dyno graph? Power, Drivability or anything.
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      03-08-2017, 08:31 PM   #30
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its in this thread... was a few days apart, but similar air temps.

for the money you spend on Dinan stage 3, with parts and installation and tune, for 1/3 the price, just get a flash tune.
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      03-09-2017, 07:40 PM   #31
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Quote:
Originally Posted by bryan_f22 View Post
its in this thread... was a few days apart, but similar air temps.

for the money you spend on Dinan stage 3, with parts and installation and tune, for 1/3 the price, just get a flash tune.
Seriously, you take this readout for real without a before run? Are we on the same page assuming 305WHP from stock? Are you trying to tell us it's a 90WHP gain from DP/IC and a piggyback/flash? To me, it'd make much more sense if they're crank numbers.

This is huge generalization, but on BMW 3.0T platform each pound of boost translate to 8~10WHP without using meth/E blend for timing advance. 9 psi at least is what it takes to get you there.

This dyno result, if anything, shows the flash tune and Dinan box make identical power...
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      03-09-2017, 07:43 PM   #32
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20 lbs of tq difference, removal of speed limiter, and savings of thousands of dollars should be enough.
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      03-10-2017, 11:09 AM   #33
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The $ cost per hp with Dinan is too high for most to consider. I went FBO for under $2k (JB4, VRSF DP, VRSF IC, CP's). If I make 20whp less than a FBO Dinan setup, I'm still ahead of the game by $2-3k, so I'm more than good with that

Once I'm out of warranty I'll go with a flash tune of some sort. They make more power, and with smoother delivery throughout the power-band.

The power curve on that Dinan S4 M2 is horrendous, what's the deal with that?
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      01-31-2019, 05:47 AM   #34
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jb4 on map 1 with everything stock, no plans on getting any bolt ons, period. no issues ya?
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      01-31-2019, 11:32 AM   #35
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Ill have a JB4 for sale soon.
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      04-25-2019, 10:15 AM   #36
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Quote:
Originally Posted by bryan_G01 View Post
I'm seriously considering Dinan Stage 2 and from what I've seen, that's consistently in the 350whp-ish range with a DP, around 370-380whp.


Just get a flash tune with bm3.

Its going to be cheaper than Dinan and net more power, with bm3 you can put the stock map back on when you go to the dealer.

I was dinan stage 3 and lost all that money on when i switched over to flash tunes and only sold dinantronics for 600$.
Hey man,

Since you seem to be pretty knowledgeable on Dinan, was looking to get your input on the power of my car.

I drive a 2015 M235i (AWD). Currently I am running a full Stage 3 Dinan set up - stage 3 tune, intake, exhaust and FMIC all through Dinan. Any idea on what power im looking at? WHP and crank?

Much appreciated.
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      05-06-2019, 10:22 PM   #37
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Quote:
Originally Posted by Nickdinj View Post
Hey man,

Since you seem to be pretty knowledgeable on Dinan, was looking to get your input on the power of my car.

I drive a 2015 M235i (AWD). Currently I am running a full Stage 3 Dinan set up - stage 3 tune, intake, exhaust and FMIC all through Dinan. Any idea on what power im looking at? WHP and crank?

Much appreciated.
roughly

stock dp = 370
sport dp = 380
no dp = 390

all depends on octane as well
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