Problems on the dyno

MWKrohn1 · 03-14-2012, 07:56 PM

I have had my 2009 135i Automatic dynoed at two different shops in the last two weeks and showed really crappy numbers. While running Map 6 (Custom Tune) 15 lbs of boost with a DCI I ran 308 rwhp and 310 lbs/ft. I then ran VP 104 on Map 7 (Race Tune) and ran a 322 rwh and 332 lbs/ft. I know I should around 355-380 rwhp. I spoke with the tech at Dallas Mustang and he said that my Air/Fuel Ratio was high. I was running too rich. My AFR was 14.8. Any thoughts?

Basheezy · 03-14-2012, 08:03 PM

if its a mustang type dyno then it will show lower numbers than a dynojet(which most people use).
mustang dynos are also called heartbreaker dynos

P7X · 03-14-2012, 08:08 PM

That's not rich dude. 14.8 @ WOT on a dyno that's towards lean, not getting enough gas. I would think u should be in the 11-13 range somewhere.

MilehighM3 · 03-14-2012, 08:08 PM

14.8 is lean, not rich.

Clovef · 03-14-2012, 08:57 PM

That is way too lean for wot. That is about what you would expect at idle.

aM. · 03-14-2012, 09:01 PM

14.8 should be the idle A/F ratio, while WOT should be about 11.8-~12.8 or somewhere around that ballpark.

Mike@N54Tuning.com · 03-15-2012, 06:39 AM

When you dyno you'd do datalogs and then email the CSV exports in to BMS along with the dyno charts for advice. If it's a mustang dyno might be normal for power output. If you have been doing custom tuning, etc, you may have set something too lean. I'd get the logs in to BMS ASAP.

Mike

MWKrohn1 · 03-17-2012, 11:05 PM

Its was on a dyno jet. I'm familiar with mustang dynos. It's weird, i know, thanks for the help, though. Hopefully I can get this fixed. Mike I'll email you the dyno graph. Let me know if there is anything else you need to troubleshoot.

MWKrohn1 · 03-17-2012, 11:18 PM

Mike could this be a result of not enough modifications or octane to run Map7? I thought it might be safe to run Map 7 (race map) for just a couple of dyno runs. I actually was running 93 octane with octane booster. I know, probably dumb, what can I say, wanted to see high numbers. Could that be a reason that I am too lean? The air to fuel ratio graph drops off at 5100 rpm it isnt consistent.

Mike@N54Tuning.com · 03-18-2012, 07:33 AM

Quote:

Originally Posted by MWKrohn1

Mike could this be a result of not enough modifications or octane to run Map7? I thought it might be safe to run Map 7 (race map) for just a couple of dyno runs. I actually was running 93 octane with octane booster. I know, probably dumb, what can I say, wanted to see high numbers. Could that be a reason that I am too lean? The air to fuel ratio graph drops off at 5100 rpm it isnt consistent.

I couldn't tell you but email your CSV log to BMS for support / advice.

Mike

pnosker · 03-18-2012, 10:54 AM

Octane booster can boost octane by up to 1-2 points max. You had way too low of an octane to run Map 7 (requires 100 octane) and 15 psi on map 6. You should have run map 1, 2, or 5. The car was likely pulling timing to save from detonation and lowering output.

03-14-2012, 07:56 PM	#1
MWKrohn1 New Member Drives: 2009 BMW 135i Join Date: Mar 2012 Location: Fort Worth, TX Posts: 7 iTrader: (0)	Problems on the dyno I have had my 2009 135i Automatic dynoed at two different shops in the last two weeks and showed really crappy numbers. While running Map 6 (Custom Tune) 15 lbs of boost with a DCI I ran 308 rwhp and 310 lbs/ft. I then ran VP 104 on Map 7 (Race Tune) and ran a 322 rwh and 332 lbs/ft. I know I should around 355-380 rwhp. I spoke with the tech at Dallas Mustang and he said that my Air/Fuel Ratio was high. I was running too rich. My AFR was 14.8. Any thoughts?
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03-14-2012, 08:03 PM	#2
Basheezy Bashar Drives: 2008 BMW 135i Join Date: Jun 2010 Location: Bay Area, CA Posts: 711 iTrader: (1)	if its a mustang type dyno then it will show lower numbers than a dynojet(which most people use). mustang dynos are also called heartbreaker dynos __________________
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03-14-2012, 08:08 PM	#3
P7X First Lieutenant Drives: N54 BMW 135i Join Date: Feb 2012 Location: Ottawa, Canada Posts: 350 iTrader: (0)	That's not rich dude. 14.8 @ WOT on a dyno that's towards lean, not getting enough gas. I would think u should be in the 11-13 range somewhere. __________________
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03-15-2012, 06:39 AM	#7
Mike@N54Tuning.com Lieutenant General Drives: 07335i Join Date: Dec 2008 Location: Earth Posts: 13,677 iTrader: (82)	When you dyno you'd do datalogs and then email the CSV exports in to BMS along with the dyno charts for advice. If it's a mustang dyno might be normal for power output. If you have been doing custom tuning, etc, you may have set something too lean. I'd get the logs in to BMS ASAP. Mike __________________ BEST PRICES GUARANTEED - New N54 Downpipe Intro Special - $319.00 JB4 G5 On Sale - FREE Shipping Click Me - NEW JB4(N55) & DCI's $95.00 NEW F30 N20/N55 ER Downpipes and Chargepipes - BMS OCC (On Sale)
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03-14-2012, 08:08 PM	#4
MilehighM3 Lieutenant Colonel Drives: E90 M3 Join Date: May 2011 Location: Colorado Springs Posts: 1,882 iTrader: (9)	14.8 is lean, not rich.
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03-14-2012, 08:57 PM	#5
Clovef Second Lieutenant Drives: 2011 135i DCT Join Date: Nov 2011 Location: Earth Posts: 262 iTrader: (1)	That is way too lean for wot. That is about what you would expect at idle.
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03-17-2012, 11:05 PM	#8
MWKrohn1 New Member Drives: 2009 BMW 135i Join Date: Mar 2012 Location: Fort Worth, TX Posts: 7 iTrader: (0)	Its was on a dyno jet. I'm familiar with mustang dynos. It's weird, i know, thanks for the help, though. Hopefully I can get this fixed. Mike I'll email you the dyno graph. Let me know if there is anything else you need to troubleshoot.
	0

03-17-2012, 11:18 PM	#9
MWKrohn1 New Member Drives: 2009 BMW 135i Join Date: Mar 2012 Location: Fort Worth, TX Posts: 7 iTrader: (0)	Mike could this be a result of not enough modifications or octane to run Map7? I thought it might be safe to run Map 7 (race map) for just a couple of dyno runs. I actually was running 93 octane with octane booster. I know, probably dumb, what can I say, wanted to see high numbers. Could that be a reason that I am too lean? The air to fuel ratio graph drops off at 5100 rpm it isnt consistent.
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03-18-2012, 10:54 AM	#11
pnosker ti fan Drives: 2008 135i Join Date: Jan 2008 Location: NJ Posts: 239 iTrader: (1) Garage List 2008 BMW 135i [5.00]	Octane booster can boost octane by up to 1-2 points max. You had way too low of an octane to run Map 7 (requires 100 octane) and 15 psi on map 6. You should have run map 1, 2, or 5. The car was likely pulling timing to save from detonation and lowering output.
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