Swap fuel injectors between cylinder banks, how?

Rob@RBTurbo · 03-11-2011, 03:49 PM

Just thinking out loud here, but ever considered cylinder compression inconsistencies as a possible culprit?

dzenno · 03-11-2011, 03:50 PM

Quote:

Originally Posted by enrita

Man i know exactly how you feel.. I have changed as well all 4 02 sensors and the car is much better but still not perfect. I am leaning as well on injectors but in your case you already changed all of them so i doubt is that. I would maybe consider carbon build up in your case since you have 50k. Might be good for you to do a clean up.
I guess as long as NO codes are thrown everything should be fine. Maybe your car just runs a tad leaner on bank 2 .

I'm thinking it might just be fine too but then that'd just be taking the easy way out lol

funny but its almost like I don't mind my car having seemingly non serious problems like this as they drive me to learn a ton more on the topics I initially had only basic or no knowledge on...where's the fun when everything is running perfect LOL

dzenno · 03-11-2011, 03:57 PM

Quote:

Originally Posted by RobBeck

Just thinking out loud here, but ever considered cylinder compression inconsistencies as a possible culprit?

No but that's very interesting and I see how it could be related but then we'd see imbalances on more cars out there as well I'd think...this is why I asked as many people to post their AFR logs under WOT, plotted against each other, at moderately high boost on pump gas to see how the two banks match up...the more data the clearer the picture will be..

jpsimon · 03-11-2011, 04:02 PM

dzenno, i've been really busy but i'll try to get some new logs soon at varying boost levels

dzenno · 03-11-2011, 04:04 PM

Quote:

Originally Posted by RobBeck

Just thinking out loud here, but ever considered cylinder compression inconsistencies as a possible culprit?

Actually thinking through this further, I think that if compression really was different in the two banks enough to cause an AFR imbalance, then this AFR imbalance would exhibit itself throughout the entire pull including idle given you keep boost the same and keep fuel pressure the same?

Quote:

Originally Posted by jpsimon

dzenno, i've been really busy but i'll try to get some new logs soon at varying boost levels

awesome! did you ever notice this or any sort of imbalance in AFR under WOT on your car before?

jpsimon · 03-11-2011, 04:11 PM

I noticed a difference pre-v5, it seemed to get better after I updated the harness and such.

enrita · 03-12-2011, 09:17 AM

These are from today 15.5 psi pump.

dzenno · 03-12-2011, 09:25 AM

Great logs again as far as no AFR imbalances...you could use a bit more fuel there at 6k rpm where it goes up towards 13 a bit...

Thanks enrita!

What's your ambient temp there in Sweden today?

enrita · 03-12-2011, 09:31 AM

Quote:

Originally Posted by dzenno

Great logs again as far as no AFR imbalances...you could use a bit more fuel there at 6k rpm where it goes up towards 13 a bit...

Thanks enrita!

What's your ambient temp there in Sweden today?

Today 5C but the streets are still bad and got really crappy traction. I think that my ported head flow so much more that it leans out after 6000 rpm. Check out the throttle closure close to redline (and bank 1 afr spike) on one of the logs. that was 1 puddle of water under a bridge , got quite a scare there

dzenno · 03-12-2011, 09:47 AM

Oh sh*t be careful man

hydroplaning is definitely not fun..when are you planning to dyno? Can't wait to see how that ported head with those turbos perform..

enrita · 03-12-2011, 10:13 AM

Quote:

Originally Posted by dzenno

Oh sh*t be careful man

hydroplaning is definitely not fun..when are you planning to dyno? Can't wait to see how that ported head with those turbos perform..

I will dyno when the car is 100% and i am happy with the logs and performance

cstmx_ryder · 04-27-2011, 05:56 PM

So on the website that has the GT1, there's another one called OPS, and it said it's for 2006 and newer vehicles?

cstmx_ryder · 05-03-2011, 01:38 PM

Where would be a good place to get injectors for N54?

I looked on Tischer's website and they list for $107.73 per.

Can I get it cheaper elsewhere?

TIA

Fernflex · 05-04-2011, 04:19 PM

www.bmwpartssource.com here is a couples of bucks cheaper!

Gti1 can code injectors

Im having injectors problems and I found out when I was going 50mph in 5th gear at low rpm and I go wide open to pass another car when the car started to boost and the injector duty cycle is higher it was misfiring.

03-11-2011, 03:49 PM	#45
Rob@RBTurbo Lieutenant Colonel 390 Rep 1,571 Posts Drives: '08 335I AT, '14 M6 DCT Join Date: Jan 2008 Location: St. Louis, MO iTrader: (5)	Just thinking out loud here, but ever considered cylinder compression inconsistencies as a possible culprit?
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03-11-2011, 04:02 PM	#48
jpsimon Team Zissou 3163 Rep 10,200 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	dzenno, i've been really busy but i'll try to get some new logs soon at varying boost levels
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03-11-2011, 04:11 PM	#50
jpsimon Team Zissou 3163 Rep 10,200 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	I noticed a difference pre-v5, it seemed to get better after I updated the harness and such.
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03-12-2011, 09:17 AM	#51
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	These are from today 15.5 psi pump. Attached Images __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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03-12-2011, 09:25 AM	#52
dzenno Banned 287 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	Great logs again as far as no AFR imbalances...you could use a bit more fuel there at 6k rpm where it goes up towards 13 a bit... Thanks enrita! What's your ambient temp there in Sweden today?
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03-12-2011, 09:47 AM	#54
dzenno Banned 287 Rep 5,876 Posts Drives: Join Date: Feb 2006 iTrader: (1)	Oh sh*t be careful man hydroplaning is definitely not fun..when are you planning to dyno? Can't wait to see how that ported head with those turbos perform..
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04-27-2011, 05:56 PM	#56
cstmx_ryder Colonel 173 Rep 2,875 Posts Drives: A metal box with a roundel Join Date: Jul 2007 Location: Portland, OR iTrader: (2)	So on the website that has the GT1, there's another one called OPS, and it said it's for 2006 and newer vehicles? __________________ '08 AW E90 335i PROcede V5 \| BMS DCI \| RR DPs \| ETS FMIC \| FORGE DVs \| Stett CP \| Vanguard \| PSS10
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05-03-2011, 01:38 PM	#57
cstmx_ryder Colonel 173 Rep 2,875 Posts Drives: A metal box with a roundel Join Date: Jul 2007 Location: Portland, OR iTrader: (2)	Where would be a good place to get injectors for N54? I looked on Tischer's website and they list for $107.73 per. Can I get it cheaper elsewhere? TIA __________________ '08 AW E90 335i PROcede V5 \| BMS DCI \| RR DPs \| ETS FMIC \| FORGE DVs \| Stett CP \| Vanguard \| PSS10
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05-04-2011, 04:19 PM	#58
Fernflex First Lieutenant 49 Rep 334 Posts Drives: E92 Crimson Red 335i Join Date: Oct 2009 Location: Guaynabo iTrader: (9)	www.bmwpartssource.com here is a couples of bucks cheaper! Gti1 can code injectors Im having injectors problems and I found out when I was going 50mph in 5th gear at low rpm and I go wide open to pass another car when the car started to boost and the injector duty cycle is higher it was misfiring. __________________ R56 Cooper S E92 335i E30 332is Burger Tuning, Evolution Racewerks and VRFS in Puerto Rico...
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