N55 DP

mjp · 10-17-2011, 01:51 AM

Locally developed in South Africa...pretty impressed with the results...gained 13.4whp and 100NM of torque on a stock car...will post dyno and video...

Slops · 10-17-2011, 05:47 AM

Please do... Where are you finding all this new stuff?

Q4P · 10-17-2011, 05:50 AM

100 nm = 73 lb-ft of TQ lol, your dyno is wrong buddy. You are never gonna gain that much with just a downpipe.

mjp · 10-17-2011, 05:58 AM

Quote:

Originally Posted by Questforpower

100 nm = 73 lb-ft of TQ lol, your dyno is wrong buddy. You are never gonna gain that much with just a downpipe.

Here is the dyno graph. Stock vs DP. I was also amazed as 100NM seems like quite a bit.

Q4P · 10-17-2011, 06:05 AM

It looks to me like there is something wrong there, that is a real weird tq spike between 2500-3500 rpm. I am willing to bet the dyno is reading wrong.

mjp · 10-17-2011, 06:06 AM

Quote:

Originally Posted by Questforpower

It looks to me like there is something wrong there, that is a real weird tq spike between 2500-3500 rpm. I am willing to bet the dyno is reading wrong.

I think that got to do with the DCT tranny. It is a benchmark dyno and alot of guys use it. I will post up a stock vs map only graph shortly.

mjp · 10-17-2011, 06:11 AM

Here is my stock vs software only dyno.

Q4P · 10-17-2011, 06:26 AM

The 2nd graph looks way more realistic; at least it's smooth and shows a gain over a broader powerband; the 1st graph def shows the DP and how it would make the turbo spool quicker but it should not spike 100 newton meters. Is it possible that your clutch is slipping?

mjp · 10-17-2011, 06:32 AM

Quote:

Originally Posted by Questforpower

The 2nd graph looks way more realistic; at least it's smooth and shows a gain over a broader powerband; the 1st graph def shows the DP and how it would make the turbo spool quicker but it should not spike 100 newton meters. Is it possible that your clutch is slipping?

Not sure if its slipping. Never had any issues with the clutch. How would I know if its slipping?

Q4P · 10-17-2011, 06:35 AM

Quote:

Originally Posted by mjp

Not sure if its slipping. Never had any issues with the clutch. How would I know if its slipping?

You try to accelerate but instead the rpms spike and you don't go anywhere. I doubt that's the case though, I just think the dyno read wrong, I want to believe this but I don't think anyone ever has seen gains that high with just a downpipe (especially with no tune/software).

mjp · 10-17-2011, 06:37 AM

Quote:

Originally Posted by Questforpower

You try to accelerate but instead the rpms spike and you don't go anywhere. I doubt that's the case though, I just think the dyno read wrong, I want to believe this but I don't think anyone ever has seen gains that high with just a downpipe (especially with no tune/software).

could be a boost spike?

Q4P · 10-17-2011, 06:44 AM

Quote:

Originally Posted by mjp

could be a boost spike?

It may be because if u notice there is also a tiny hp bump in the same area that there is a tq bump. I would just consider re dynoing sometime because those are really high gains and certainly not realistic for just a dp.

ciomas · 10-17-2011, 07:10 AM

well if your clutch was slipping clearly you wouldnt be putting more power down on to the rollers

10-17-2011, 01:51 AM	#1
mjp Private First Class 24 Rep 131 Posts Drives: 135i Join Date: Feb 2011 Location: in my 135i iTrader: (0)	N55 DP - 100NM gain without software Locally developed in South Africa...pretty impressed with the results...gained 13.4whp and 100NM of torque on a stock car...will post dyno and video...
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10-17-2011, 05:47 AM	#2
Slops Major General 188 Rep 5,417 Posts Drives: 2005 C55 AMG Join Date: Jan 2011 Location: Oxford iTrader: (2)	Please do... Where are you finding all this new stuff?
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10-17-2011, 05:50 AM	#3
Q4P Colonel 83 Rep 2,291 Posts Drives: Too Much Join Date: Apr 2011 Location: World iTrader: (0)	100 nm = 73 lb-ft of TQ lol, your dyno is wrong buddy. You are never gonna gain that much with just a downpipe. __________________ 2jZ + RB26 + 4G63 + LS9 + N54 =
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10-17-2011, 06:05 AM	#5
Q4P Colonel 83 Rep 2,291 Posts Drives: Too Much Join Date: Apr 2011 Location: World iTrader: (0)	It looks to me like there is something wrong there, that is a real weird tq spike between 2500-3500 rpm. I am willing to bet the dyno is reading wrong. __________________ 2jZ + RB26 + 4G63 + LS9 + N54 =
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10-17-2011, 06:11 AM	#7
mjp Private First Class 24 Rep 131 Posts Drives: 135i Join Date: Feb 2011 Location: in my 135i iTrader: (0)	Here is my stock vs software only dyno. Attached Images
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10-17-2011, 06:26 AM	#8
Q4P Colonel 83 Rep 2,291 Posts Drives: Too Much Join Date: Apr 2011 Location: World iTrader: (0)	The 2nd graph looks way more realistic; at least it's smooth and shows a gain over a broader powerband; the 1st graph def shows the DP and how it would make the turbo spool quicker but it should not spike 100 newton meters. Is it possible that your clutch is slipping? __________________ 2jZ + RB26 + 4G63 + LS9 + N54 =
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10-17-2011, 07:10 AM	#13
ciomas Captain 30 Rep 679 Posts Drives: M4 Join Date: Feb 2010 Location: 3city PL iTrader: (0)	well if your clutch was slipping clearly you wouldnt be putting more power down on to the rollers __________________ 335 - Öhlins//Swift//M3 front suspension//M3 subframe bushes//Quaife LSD//AR Design Catless//Forge Intercooler//Alcon BBK//Goodridge//AFE//RPI//Fenders - SOLD M4-Mineral Gray/Full Shakir Orange/DCT/M Ceramic/M Adaptive Susp.
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