[makarov88]

Whats up guys, I went down today to OCD customs to get my N55 dyno'd after the last time I was there where I got a huge pull of 352 HP / 423TQ.

This time things were a bit different, I added the Stett FMIC, Vishnu Charge pipe, and AFE stage 2 intake.... first thing is first, I went ahead and removed the AFE stage 2 intake after about 2 runs reason being is that I do not think an intake helps the N55 in fact I want to put my money on it actually being detrimental to performance and the MAF sensor.

So anyway I'm pretty happy with the results because even though the numbers were lower than my monster pull last time they were consistent, I think a lot has to do with how hot is was today (92 with 20% humidity) and also Shiv told me there wasn't enough fans blowing (there was only 1 jolly jump fan ^^) Anyways a lot can be contributed to how the dyno runs that day and the weather and with that said I still got some strong numbers

the second AFE intake run isnt up there I got like 310 / 379.. anyways heres the graph



Maybe shiv or someone can comment on the drop I'm seeing around 3100 before it picks back up... and I found it funny that lowering the max boost to 12 when the car probably boosts to 13 or 14 actually made my numbers go up.

I feel that all these bolt on mods I've done have increased the "flow" of everything which is why I'm holding power further through the rpm range, but I feel its the single turbo thats really restricting all that extra flow from actually being utilized... iono maybe you guys can chime in

Constructive stuff please, this is so we can all learn and improve on in the future...

[Keik E92 M3]

Nice runs man... i think 13-14 psi is the sweet spot for this car.

Where is your max dyno chart?

[FrankiE90]

thanks for post'n.
did you happen to datalog?

there should of been a 12253 code and 13001
which is normal.
the 13001 one is a code that's thrown that shows the front wheels
aren't spin/.

did your N55 go into limp mode at all?
and what map and oct gas.

dont threat, i pull'd my intake off just for that fact but
i'm tell'n you it maybe how the dyno pulls are done.
100 throttle from 2K rpm to 7k.

I've been driving for a week with it off and bout to
redyno stock intake and with intake. will let you know.
you can come to the dyno session if your interested.

[makarov88]

na i didnt frankie , I'l do that when we both go ^^

[FrankiE90]

Originally Posted by makarov88

na i didnt frankie , I'l do that when we both go ^^

that sounds good that way there will be a side by side
comparison. But what's important are the curves from
baseline and after mods.
that's the true test on gains.

from my curve i notice with the N55 it drops past 5k.
not too much just some.
the power mods do so much with this smaller turbo.
it's amazing the power output with low psi.

[grandmoff]

Nice!

[makarov88]

Frankie I was running map 2 but I did a lot of changes to it

For instance when I was running 16 PSI as max setting I had 50% max boost set as well as Ignition Control set to 50... I was running 93

For the rest of them I put Max boost to 14.... 40% Max boost set and IC at 50 as well

[FrankiE90]

i say put it back to stock setting.

Reassure, you're bimmers pretty strong according to
Rene and Ivan. And they've been in my bimmer.
Adrenaline rush for sure.
They've got good butt dyno's.
more with Ivan than Rene - nohomo.



I believe it's how the dyno's are done.
that are yeild'n these numbers.
what's more import is to look what's in
between the curves. I wouldn't care if
my numbers were low just as long as
my baseruns vs mod'd runs, show the advertised
gains.

All your runs - the curves are similar which
tells you that the response of ur
bimmer+tune+bolt ons is consistent.
that's good, i would guess.

How you throttle, how you wot
needs to be pushed with these small turbos.
These small turbos are ask'n to be beat the f' up.

I'm confident that next runs you'll see different gains.
cross my fingers.
That's where i'm at with my next runs -
because i'm in the same boat.
To me this is the fun part of a 1st year production engine.

just sit back and
I'll pm u when dyno'n again - maybe if some other
locals that want to dyno I can setup a date.

[CobraMarty]

A/F ratios look scary lean. Do you have a tune on it?

[dyezak]

Originally Posted by CobraMarty

A/F ratios look scary lean. Do you have a tune on it?

That looks like Procede auto-tune A/F ratios....

[CobraMarty]

I don't know if I would trash that AFE stage 2 intake yet. It did pick up 31-51TQ depending on which run you compare it to. So it lost a few peak HP, 31-51TQ is huge and very noticeable. What boost did the AFE stage 2 intake have?

[shockin330i]

Your car may have hit the infamous "valet" mode that shiv talked about in a previous thread. You're boost probably went over the max set for more than a second.

Originally Posted by shiv@vishnu

Without seeing the actual dyno graph, I'm willing to bet that your car went into valet mode in the middle of a run. This is the one issue with running a boost setting that is equal to your max boost setting. If boost exceeds the max boost setting by 1psi for longer than 1 second, the Procede will go into valet mode. And on the dyno, when you lug it from a low RPM, in a high gear, just this can happen. You can get around this by increasing the boost delay user adjustable value or by increasing the max boost value.

The other problem your dyno operator had was that he didn't know not to press past the throttle kick-down switch. When he did this, the car would downshift. This is why he thought your transmission was slipping. Once I explained this to him, that issue was solved.

I'm actually on a dyno right now as I type this. I'll be writing up a "How To Dyno Your N55/N54" tutorial just to avoid these issues in the future.

BTW, our n55 with our DP and home-brew 3" exhaust is putting down:

353whp/425lbft at 15psi
342whp/380lbft at 12psi

Pretty easy formula and will be explained later tonight...
Cheers,
Shiv

[Slops]

Originally Posted by shockin330i

Your car may have hit the infamous "valet" mode that shiv talked about in a previous thread. You're boost probably went over the max set for more than a second.

ahhhh good catch man. I would put the settings back to original - do some adaptions reset and drive the car around hard for a while before going back to the dyno if you are going back again. Not bad numbers though!

[shockin330i]

I need to dyno

[blankstar43]

Originally Posted by dyezak

That looks like Procede auto-tune A/F ratios....

my A/F with the Procede autotune maps is closer to 11.5ish

[FrankiE90]

Originally Posted by shockin330i

I need to dyno

orly?

[Booztd 3]

Originally Posted by makarov88

Maybe shiv or someone can comment on the drop I'm seeing around 3100 before it picks back up... and I found it funny that lowering the max boost to 12 when the car probably boosts to 13 or 14 actually made my numbers go up.

That drop you're seeing is the car going lean as hell....and likely detonating like crazy.

Take a quick look at your A/F ratio and its around 16 which is even lean for cruising, let alone peak tq.

That thing needs fuel, in a big way. I would seriously not even drive your car at WOT until you get it back on the dyno with some added fuel (or pulled timing)

You'll want to see that AF around 11.5 on pump gas (not sure what octane you're on) but anything from the pump needs to be around 11.5

It even appears you're lean through damn near all of your powerband

[shockin330i]

Originally Posted by Booztd 3

That drop you're seeing is the car going lean as hell....and likely detonating like crazy.

Take a quick look at your A/F ratio and its around 16 which is even lean for cruising, let alone peak tq.

That thing needs fuel, in a big way. I would seriously not even drive your car at WOT until you get it back on the dyno with some added fuel (or pulled timing)

You'll want to see that AF around 11.5 on pump gas (not sure what octane you're on) but anything from the pump needs to be around 11.5

It even appears you're lean through damn near all of your powerband

Welcome to DI. These cars all run ugly lean. The drop has to do with boost overshooting the max and the car compensating for it.

[Booztd 3]

I can understand DI causing a more complete combustion process (IE leaner) however that cylinder still is going to need that extra unburned fuel for quench purposes.....

[shockin330i]

Originally Posted by Booztd 3

I can understand DI causing a more complete combustion process (IE leaner) however that cylinder still is going to need that extra unburned fuel for quench purposes.....

On the n55, fuel was thought to be a factor but after the procede update and fuel connector to monitor fuel levels, everything seems to be fine.

[cn555ic]

Yeah A/f looks really lean....I guess the N55 is plagued with this as I see alot of logs exhibit this..

[TreDirtyFive]

yikes