N55 Dyno before and after

Nugget · 03-25-2013, 07:38 PM

Hello all,

I recently got installed
-JB4
-BMS Catless downpipes
-custom downpipe back exhaust
-ER FMIC
-ER Chargepipe

Got a before and after dyno done and thought I'd post them if anyone was interested or had any comments.

Petrol is P100 (100 ron 10% ethanol) and JB4 was on map5.

I know the final number is low compared to a dynojet but the deltas seems pretty good to me.

The before lines are in yellow and a bit hard to see on the scans

HP and Torque

HP and AFR

HP and boost (no boost measurement on the baseline)

first350 · 03-25-2013, 09:15 PM

Wow...that's a lot more boost from stock. What is the Normal JB4 maps do for boost??

Nugget · 03-25-2013, 09:37 PM

They didn't hook up the boost sensor on the baseline run as the chargepipe wasn't installed. That's why the line is at 0.
Stock boost is 10psi
Map 5 will do 11-16 psi depending on octane, temperature, knock etc.
It seems to spike to 16-17 then hold 15psi through the mid range then taper off.

Bavarian54bimmer · 03-25-2013, 09:37 PM

Does the N55 Turbo take this boost with no issues at all ?

Nugget · 03-25-2013, 09:49 PM

Apparently, it just can't hold it into higher rpms.
You can see if taper from 15 psi back to 10 at redline.

Car feels very strong in the mid range.
I'll try to get to the drag strip tomorrow and see what it runs.

ParkNuts · 03-25-2013, 10:17 PM

Thanks for the info! Solid gains but what kind of dyno?

RnmEvo9 · 03-25-2013, 10:23 PM

Nice delta, definitely curious to see what you run if you take it to the strip.

Nugget · 03-25-2013, 10:34 PM

Quote:

Originally Posted by ParkNuts

Thanks for the info! Solid gains but what kind of dyno?

Dyno Dynamics

Quote:

Originally Posted by RnmEvo9

Nice delta, definitely curious to see what you run if you take it to the strip.

Me too. Although I am no good at getting it off the line.
I ran 13.5 at 104mph stock.

RnmEvo9 · 03-25-2013, 11:04 PM

Quote:

Originally Posted by Nugget

Me too. Although I am no good at getting it off the line. I ran 13.5 at 104mph stock.

Me neither especially since I am on stock runflats. I primarily focus on trap speeds as that tells you if the car is making the power it claims. 104mph is a good trap speed for a stock car though!

fly_inverted · 03-26-2013, 01:38 AM

can you tell me what your stock max HP was ?.....it looks like apprx 230 HP (173kw)

impressive results...

Nugget · 03-26-2013, 01:50 AM

Quote:

Originally Posted by fly_inverted

can you tell me what your stock max HP was ?.....it looks like apprx 230 HP (173kw)

impressive results...

That's all I have at the moment, I've asked for better copies with all the figures.

SLIPPERY · 03-26-2013, 05:22 AM

Quote:

Originally Posted by Nugget

Petrol is P100 (100 ron 10% ethanol) and JB4 was on map5.

Where can we get P100 in perth?

BEAR-AvHistory · 03-26-2013, 07:21 AM

Quote:

Originally Posted by RnmEvo9

Me neither especially since I am on stock runflats. I primarily focus on trap speeds as that tells you if the car is making the power it claims. 104mph is a good trap speed for a stock car though!

RFT's ain't great but a 335is stock except for the JB4 with an E85 mix broke into the 11's on them & I have run 12.5 with a JB4 & RFT's.

That being said I have switched to Conti DW for this year & will pull the RFT off the 135is after break-in & add the JB4.

RnmEvo9 · 03-26-2013, 09:38 AM

Quote:

Originally Posted by BEAR-AvHistory

RFT's ain't great but a 335is stock except for the JB4 with an E85 mix broke into the 11's on them & I have run 12.5 with a JB4 & RFT's.

That being said I have switched to Conti DW for this year & will pull the RFT off the 135is after break-in & add the JB4.

I have ran 12.0-12.1s all day on RFT's with terrible 2.1-2.2 60fts. Like I said, I can't launch with RFT's, but I am pretty happy with my 118-119mph trap speeds.

Definitely can't wait to see OP's results if he takes it!

GeeRam · 03-26-2013, 03:48 PM

Quote:

Originally Posted by Nugget

I know the final number is low compared to a dynojet

Better to have relatively accurate and realistic figures than inflated Dynojet figures though

Your stock baseline figures arn't too far away from my N55 DCT stock baseline figures on a Dyno Dynamics last year.

Mine ran 253 rwhp.

I reckon your 300 rwhp is about 355hp at the flywheel.

Nugget · 03-26-2013, 07:25 PM

Quote:

Originally Posted by SLIPPERY

Where can we get P100 in perth?

Certain United stations. I know Mount Lawley and Osborne Park definitely have it.

Quote:

Originally Posted by GeeRam

Better to have relatively accurate and realistic figures than inflated Dynojet figures though

Your stock baseline figures arn't too far away from my N55 DCT stock baseline figures on a Dyno Dynamics last year.

Mine ran 253 rwhp.

I reckon your 300 rwhp is about 355hp at the flywheel.

My thinking was if the car has 300 flywheel hp stock and it got a 30% increase would that put it closer to 390hp? Or is that not how it works?

fly_inverted · 03-26-2013, 08:57 PM

Quote:

Originally Posted by Nugget

Certain United stations. I know Mount Lawley and Osborne Park definitely have it.

My thinking was if the car has 300 flywheel hp stock and it got a 30% increase would that put it closer to 390hp? Or is that not how it works?

that's how it works as far as i know. if you have
230 HP at rear wheels when you know you have 305 HP at flywheel
then applying that ratio, your
300 HP at rear wheels equates to 400 HP at flywheel.

GeeRam · 03-27-2013, 01:56 PM

Quote:

Originally Posted by Nugget

My thinking was if the car has 300 flywheel hp stock and it got a 30% increase would that put it closer to 390hp? Or is that not how it works?

Yes, a 30% increase in output from a base 300hp engine would be 390hp.

But, you can only go on what your measured before and after rwhp figures are.

General rule of thumb for calculating an 'approximate' flywheel figure from a measured rwhp for a rwd car would be:-

Add 10hp to the measured rwhp figure and then divide by 0.88

This allows for most variations in transmission losses and all other variables.

Only true way to measure flywheel figures is pull the motor and whack it on a engine dyno though. But the above calculation is close enough to get a ball park figure.

GeeRam · 03-27-2013, 01:58 PM

Quote:

Originally Posted by fly_inverted

300 HP at rear wheels equates to 400 HP at flywheel.

Only if the transmission is full of cement...........

Nugget · 04-10-2013, 07:31 PM

Went to the strip last night.
I still can't get the launch right with the DCT, it's either roll it off the line or sit there spinning. 60 foots ranged from 2.1 to 3.08 when I tried launch control.

So stock I did
13.593 @ 104.65

last night I did
12.729 @ 110.97

Not too fussed about the time but does that MPH seems about right?

Full timeslips below,
Stock

Modified

eriktufa · 04-11-2013, 06:33 AM

Quote:

Originally Posted by Nugget

Went to the strip last night.
I still can't get the launch right with the DCT, it's either roll it off the line or sit there spinning. 60 foots ranged from 2.1 to 3.08 when I tried launch control.

So stock I did
13.593 @ 104.65

last night I did
12.729 @ 110.97

Not too fussed about the time but does that MPH seems about right?

Full timeslips below,
Stock

Modified

I'm not critizing in anyway but it is a bit slow. with that mods, I'm expecting at least mid 12 and higher trap time plus you have launch control and dct?

Erik

froop · 04-11-2013, 07:39 AM

Trap speed seems about right to me for that kind of power. I got a 118mph with 300kW (~400hp) atrw in a 6MT.

03-25-2013, 07:38 PM	#1
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	N55 Dyno before and after Hello all, I recently got installed -JB4 -BMS Catless downpipes -custom downpipe back exhaust -ER FMIC -ER Chargepipe Got a before and after dyno done and thought I'd post them if anyone was interested or had any comments. Petrol is P100 (100 ron 10% ethanol) and JB4 was on map5. I know the final number is low compared to a dynojet but the deltas seems pretty good to me. The before lines are in yellow and a bit hard to see on the scans HP and Torque HP and AFR HP and boost (no boost measurement on the baseline)
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03-25-2013, 09:15 PM	#2
first350 Private 8 Rep 92 Posts Drives: 2016 F80 M3 Join Date: Feb 2013 Location: Seattle iTrader: (1)	Wow...that's a lot more boost from stock. What is the Normal JB4 maps do for boost??
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03-25-2013, 09:37 PM	#3
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	They didn't hook up the boost sensor on the baseline run as the chargepipe wasn't installed. That's why the line is at 0. Stock boost is 10psi Map 5 will do 11-16 psi depending on octane, temperature, knock etc. It seems to spike to 16-17 then hold 15psi through the mid range then taper off.
	Appreciate 0 Quote

03-25-2013, 09:37 PM	#4
Bavarian54bimmer Second Lieutenant 54 Rep 216 Posts Drives: Alpine White 2008 135i Join Date: Feb 2012 Location: Montreal , Canada iTrader: (0)	damn! Does the N55 Turbo take this boost with no issues at all ? __________________ 2008 135i Alpine White 6MT/ BMW SSK / top HiFi logic 7 / Red Boston / Michelin PSS / PPK1 / OE Perf Discs with Cool Carbon /CDV Delete .
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03-25-2013, 09:49 PM	#5
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	Apparently, it just can't hold it into higher rpms. You can see if taper from 15 psi back to 10 at redline. Car feels very strong in the mid range. I'll try to get to the drag strip tomorrow and see what it runs.
	Appreciate 0 Quote

03-25-2013, 10:17 PM	#6
ParkNuts First Lieutenant 99 Rep 370 Posts Drives: 2021 Tesla Model 3 Performance Join Date: Apr 2011 Location: Dallas iTrader: (0)	Thanks for the info! Solid gains but what kind of dyno?
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03-25-2013, 10:23 PM	#7
RnmEvo9 Banned 247 Rep 1,827 Posts Drives: 2007 335i Join Date: Apr 2011 Location: Pembroke Pines, FL iTrader: (2)	Nice delta, definitely curious to see what you run if you take it to the strip.
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03-26-2013, 01:38 AM	#10
fly_inverted Private First Class 9 Rep 108 Posts Drives: 135i Coupe. Mar 2012 Join Date: Nov 2009 Location: Canberra iTrader: (0)	can you tell me what your stock max HP was ?.....it looks like apprx 230 HP (173kw) impressive results...
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04-10-2013, 07:31 PM	#20
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	Went to the strip last night. I still can't get the launch right with the DCT, it's either roll it off the line or sit there spinning. 60 foots ranged from 2.1 to 3.08 when I tried launch control. So stock I did 13.593 @ 104.65 last night I did 12.729 @ 110.97 Not too fussed about the time but does that MPH seems about right? Full timeslips below, Stock Modified
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04-11-2013, 07:39 AM	#22
froop Colonel 171 Rep 2,682 Posts Drives: 08 AW 6MT E82 Join Date: Jul 2012 Location: Sydney, Australia iTrader: (3)	Trap speed seems about right to me for that kind of power. I got a 118mph with 300kW (~400hp) atrw in a 6MT. __________________ froop's AW 135i Build Thread
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