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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 01-04-2012, 02:21 AM   #61
MSportBMW
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Rob with your planned set up I cant see how you would consider anything other than a custom tune for your car. The guy with the 323 who had the 272s fitted here in Sydney used a dyno shop that reflashed and custom tuned using the OEM ECU
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Old 01-04-2012, 02:00 PM   #62
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Rob with your planned set up I cant see how you would consider anything other than a custom tune for your car. The guy with the 323 who had the 272s fitted here in Sydney used a dyno shop that reflashed and custom tuned using the OEM ECU
I here you.

Don't get me wrong, I'll definitely get a custom tune if needed. BUT, I of course am going to
try to make it work the way it is with the Shark Injector. At this moment in time it's anyones guess, if it runs real good & makes good power after some manual fuel pressure tuning; well then I'll be done.
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Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 01-04-2012, 02:04 PM   #63
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Rob, I'm not doubting your math at all. It does sound like you will need more gas than the stock injectors can deliver, at least at WOT. But doesn't someone here know whether the DME adjusts fuel mostly based on the MAF reading or mostly on the pre-cat O2 sensor (A/F ratio) reading?

I wonder.... if you only need that extra fuel at WOT, can the adjustable FPR be programmed to use a lower pressure most of the time and higher pressure only at WOT? Is it manually adjustable under the hood with a screw, or does it adjust dynamically based on intake manifold vacuum? Or will you have a "fun" button on the dash that raises the fuel pressure?

Speaking of which, don't our cars have the FPR built into the fuel filter? So do you set up the adjustable FPR inline with the existing one, or replace the existing one? Or is the stock FPR under the hood?

Quote:
Originally Posted by Rob43 View Post
Currently I have a good deal of faith in two things, 1) My motor really will need more fuel. 2) The ability to dial down fuel pressure (if needed) manually, via an adjustable fuel pressure regulator.

Lets talk some very simple math.
I'm really hoping, crossing fingers and or praying that I don't need a custom tune.
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Old 01-05-2012, 12:08 AM   #64
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Rob, I'm not doubting your math at all. I am. lol

It does sound like you will need more gas than the stock injectors can deliver, at least at WOT. Yes, I agree. But doesn't someone here know whether the DME adjusts fuel mostly based on the MAF reading or mostly on the pre-cat O2 sensor (A/F ratio) reading?

I wonder.... if you only need that extra fuel at WOT, I would think that based on the head & cams flowing more CFM compared to stock, it would need more fuel through the entire RPM band. can the adjustable FPR be programmed to use a lower pressure most of the time and higher pressure only at WOT? No. Is it manually adjustable under the hood with a screw, Yes. or does it adjust dynamically based on intake manifold vacuum? No. Or will you have a "fun" button on the dash that raises the fuel pressure? No.

Speaking of which, don't our cars have the FPR built into the fuel filter? Yes. So do you set up the adjustable FPR inline with the existing one, Maybe. or replace the existing one? Maybe Or is the stock FPR under the hood? No.
The stock E46 fuel pressure is 52 psi, if the stock FPR built into the fuel filter can be set higher than this, it may be left in place. If on the other hand it barely reaches that number, it will get replaced with a high performance non adjustable fuel filter. So I don't know yet what will be left in place, if some of the fuel system needs to be re-worked it will be. Below are the leading contenders for the FPR & gauge.


Aeromotive - Universal Compact Adjustable Fuel Pressure Regulator
http://store.vacmotorsports.com/aero...ator-p102.aspx

Aeromotive - Fuel Pressure Regulator / Gauge
http://store.vacmotorsports.com/aero...uge-p2062.aspx


Rob
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Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 01-05-2012, 10:20 AM   #65
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My local tuner was trying to get me to go with the AFPR route. He says he's had good luck with tuning. I wanted to get all my "modding" finished before a custom tune, though.
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Old 01-05-2012, 01:28 PM   #66
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A little eye candy...............UUC-TD-B1-E46-5-PO Twin Organic.

Twin Disk Flywheel/Clutch package
for E46 3-series 5-speed models
Street-friendly clutch performance
for extreme-power BMWs.
Twin Organic: 850hp, 640ft-lb applications



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PS, my UUC Stage 2 LTW Flywheel & Performance Organic clutch kit may be available. 1,500 (Perfect) miles on it, # B1-A-PO Fits all 1999- 9/2003 production date E46 6-cylinder 3-series (5-speed models), Z3 2.5/3.0 with M54 engine, 1996-2003 E39 530i/528i/525i/523i.
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Rob #43 ITS/ITR/STU, BMW 325I, STU LAP RECORD
SUMMIT POINT WV 1:24:229 S.C.C.A.
(DynoDynamics http://www.vimeo.com/8486878 Dyno Video)
"Chance Favors The Prepared Mind" M54 CAMS 264/252 $849
Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!

Last edited by Rob43; 01-13-2012 at 06:14 PM.
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Old 01-05-2012, 06:51 PM   #67
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My local tuner was trying to get me to go with the AFPR route. He says he's had good luck with tuning. I wanted to get all my "modding" finished before a custom tune, though.

Brady,

You'll never be done "modding", it's some sort of sickness. I myself am on step 3 of a 12 step program to help my addiction, BUT IT'S NOT WORKING !



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SUMMIT POINT WV 1:24:229 S.C.C.A.
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"Chance Favors The Prepared Mind" M54 CAMS 264/252 $849
Quote:
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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 01-05-2012, 07:18 PM   #68
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Brady,

You'll never be done "modding", it's some sort of sickness. I myself am on step 3 of a 12 step program to help my addiction, BUT IT'S NOT WORKING !



Rofl same here.
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Old 01-06-2012, 08:58 AM   #69
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That setup is HOT!

No, I'll never be done... This I know.
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Old 01-06-2012, 07:58 PM   #70
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when/where do we meet? I'll be 25XX, 3.46, lwt flywhl, dinan long tube, ebay headers, massive wt red, tms ssk, tms pullies, sap/ccv/02 delete (many others)... when running juice 100 octane mixture Dyno numbers mean lil to nothing. I don't care win/lose/draw. I want to see what everyone is doing, VS what is/isn't working.

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Old 01-08-2012, 09:21 AM   #71
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that clutch setup is amazing
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Old 01-11-2012, 10:15 AM   #72
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In before spdsktr tries to claim dominance.
ogm dood mi kar wil kik ur karz ass LOL

My car isn't fast. It WILL pull a half a car length on a stock ZHP, though (in a "controlled environment"). I'd like to get pulleys, but I'm done modding it. Time to save up for something better.
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Old 01-11-2012, 11:12 AM   #73
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ogm dood mi kar wil kik ur karz ass LOL

My car isn't fast. It WILL pull a half a car length on a stock ZHP, though (in a "controlled environment"). I'd like to get pulleys, but I'm done modding it. Time to save up for something better.
I was simply trying to get a rise out of you. :/
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Old 01-11-2012, 02:42 PM   #74
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I was simply trying to get a rise out of you. :/
You'd like that too much.
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Old 01-12-2012, 12:09 PM   #75
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"Thank you for contacting us! Due to an influx of overwhelming demand we have started the development of the 2.5/2.8 boots. We are expecting the release sometime in the first quarter of next year. If you have a number of folks interested, we could arrange a group buy where as those on the list will be the first to receive the kits.


Sincerely,

Stett Performance"

I'll see for myself soon enough.
Any update on this?
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Old 01-12-2012, 11:56 PM   #76
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Any update on this?
Why do you want 2.5/2.8l boots? You have a 3.0
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here today, gone tomm

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Old 01-24-2012, 01:47 AM   #77
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So, I received a few new go-fast toys today !

All from forum sponsor Turner Motorsport:

1) Four new D-Force LTW5 / Lightweight Alloy Race Wheels - 17x9
Weighing in at 16.5 LBS each, as a reference; stock M68 wheels weigh about 22 LBS each.

2) Four BMW center caps.

3) Turner Motorsports Billet Adjustable Fuel Pressure Regulator.


Things are coming together,
Rob
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Rob #43 ITS/ITR/STU, BMW 325I, STU LAP RECORD
SUMMIT POINT WV 1:24:229 S.C.C.A.
(DynoDynamics http://www.vimeo.com/8486878 Dyno Video)
"Chance Favors The Prepared Mind" M54 CAMS 264/252 $849
Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 01-24-2012, 07:30 AM   #78
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So, I received a few new go-fast toys today !

All from forum sponsor Turner Motorsport:

1) Four new D-Force LTW5 / Lightweight Alloy Race Wheels - 17x9
Weighing in at 16.5 LBS each, as a reference; stock M68 wheels weigh about 22 LBS each.

2) Four BMW center caps.

3) Turner Motorsports Billet Adjustable Fuel Pressure Regulator.


Things are coming together,
Rob
nice!
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Old 01-24-2012, 08:10 AM   #79
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Originally Posted by Rob43 View Post
So, I received a few new go-fast toys today !

All from forum sponsor Turner Motorsport:

1) Four new D-Force LTW5 / Lightweight Alloy Race Wheels - 17x9
Weighing in at 16.5 LBS each, as a reference; stock M68 wheels weigh about 22 LBS each.

2) Four BMW center caps.

3) Turner Motorsports Billet Adjustable Fuel Pressure Regulator.


Things are coming together,
Rob
I'll tell you a little secret - S54 and M54 injectors are the same thing. The only difference is the S54 runs them at 5 bar and the M54 runs them at 3.5. you'd be far better off using your stock injectors and just increasing base pressure to get the fuel flow you need. there are other characteristics that change with injectors that are not desireable unless you can recalibrate everything. And it would still be better to recalibrate the tune for your new "real" fuel flow.

using 30# injectors with a tune meant for 24#, and using a FPR to adjust everything is not going to end well.. by the time you get the base pressure low enough for it to run, your fuel atomization will be pretty poor. you can't tune a modern DME using a FPR anyway, it's always going to be fighting you with adaptations.

no matter how badly people want it to be, adjusting base pressure with an AFPR is not tuning.

Last edited by hassmaschine; 01-24-2012 at 08:14 AM.
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Old 01-24-2012, 09:02 AM   #80
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Nice wheels! We'll be twinkies!

Quote:
Originally Posted by Rob43 View Post
So, I received a few new go-fast toys today !

All from forum sponsor Turner Motorsport:

1) Four new D-Force LTW5 / Lightweight Alloy Race Wheels - 17x9
Weighing in at 16.5 LBS each, as a reference; stock M68 wheels weigh about 22 LBS each.

2) Four BMW center caps.

3) Turner Motorsports Billet Adjustable Fuel Pressure Regulator.


Things are coming together,
Rob
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