MSD81 / V81 Question

Accel Junky · 08-05-2008, 10:50 AM

I vaguely remember seeing the answer to this before, but a quick search did not reveal.

Is V81 just throwing a code indicating the tampering with of engine parameters or does it go so far as to prevent you from doing so with a limp mode or fault mode?

As in, if Joe Blow wants his 400rwhp on his v81 car and doesn't care about the warranty, is he free to do that or will the "tune detection" actually prevent him from exceeding the amount of power that the V81 safe tunes allow?

Thanks,

GAaaAR · 08-05-2008, 10:54 AM

Quote:

Originally Posted by Accel Junky

I vaguely remember seeing the answer to this before, but a quick search did not reveal.

Is V81 just throwing a code indicating the tampering with of engine parameters or does it go so far as to prevent you from doing so with a limp mode or fault mode?

As in, if Joe Blow wants his 400rwhp on his v81 car and doesn't care about the warranty, is he free to do that or will the "tune detection" actually prevent him from exceeding the amount of power that the V81 safe tunes allow?

Thanks,

It's just throwing codes, you can still tune it like its a v80 if you don't care about the ecu throwing codes.

Malek@MRF · 08-05-2008, 02:26 PM

You can still pull out some decent power with the MSD81 and not throw codes. If throwing warranty codes is not an issue, you can tune it how you like still. Based on my own findings and R&D, the MSD81 is more sensitive though with respect to certain parameters.

Accel Junky · 08-05-2008, 02:34 PM

^^ Ok, thanks for the answers guys. For some reason I thought it actually limped home or something when the tune detection was tripped.

mistermojorizin · 08-05-2008, 02:49 PM

i remember reading when the v81 came out that the v81 prevents tuning to some degree while the 29.2 merely detects it.

Accel Junky · 08-05-2008, 03:08 PM

Quote:

Originally Posted by mistermojorizin

i remember reading when the v81 came out that the v81 prevents tuning to some degree while the 29.2 merely detects it.

Maybe that's what I saw too?

Mark313 · 08-05-2008, 05:02 PM

ha, just asked this question in a different thread before reading this one. hopefully shiv will answer as I'm also curious to know.

08-05-2008, 10:50 AM	#1
Accel Junky High on Acceleration 678 Rep 1,437 Posts Drives: 08 M3, 90 GTR, 21 Gladiator Join Date: Mar 2008 Location: Georgia, USA iTrader: (6)	MSD81 / V81 Question - Just detection or + prevention? I vaguely remember seeing the answer to this before, but a quick search did not reveal. Is V81 just throwing a code indicating the tampering with of engine parameters or does it go so far as to prevent you from doing so with a limp mode or fault mode? As in, if Joe Blow wants his 400rwhp on his v81 car and doesn't care about the warranty, is he free to do that or will the "tune detection" actually prevent him from exceeding the amount of power that the V81 safe tunes allow? Thanks,
	Appreciate 0 Tweet Quote

08-05-2008, 02:26 PM	#3
Malek@MRF Brigadier General 740 Rep 3,732 Posts Drives: E92 M3, E46 M3, G82 M4 Join Date: Jan 2008 Location: Irvine, California iTrader: (5)	You can still pull out some decent power with the MSD81 and not throw codes. If throwing warranty codes is not an issue, you can tune it how you like still. Based on my own findings and R&D, the MSD81 is more sensitive though with respect to certain parameters. __________________ BMW PERFORMANCE SPECIALISTS. Race Engines. Suspension. F/I. Brakes. Race Preparation. Factory Service. Alignments. OFFICIAL PARTNERS: KW. MOTON. Brembo. AP Racing. BBS Motorsport. iND. HRE. Turner Motorsport. VAC. BMW Motorsport. Facebook \| Instagram \| Yelp! \| Flikr Phone: 949-233-0448 \| E-Mail: info@mrfengineering.com
	Appreciate 0 Quote

08-05-2008, 02:34 PM	#4
Accel Junky High on Acceleration 678 Rep 1,437 Posts Drives: 08 M3, 90 GTR, 21 Gladiator Join Date: Mar 2008 Location: Georgia, USA iTrader: (6)	^^ Ok, thanks for the answers guys. For some reason I thought it actually limped home or something when the tune detection was tripped.
	Appreciate 0 Quote

08-05-2008, 02:49 PM	#5
mistermojorizin Lieutenant Colonel 40 Rep 1,657 Posts Drives: 135i Join Date: Apr 2008 Location: Los Angeles iTrader: (0)	i remember reading when the v81 came out that the v81 prevents tuning to some degree while the 29.2 merely detects it.
	Appreciate 0 Quote

08-05-2008, 05:02 PM	#7
Mark313 Private 0 Rep 90 Posts Drives: none Join Date: Apr 2007 Location: Rotten Apple iTrader: (0)	ha, just asked this question in a different thread before reading this one. hopefully shiv will answer as I'm also curious to know.
	Appreciate 0 Quote