330 ASA SKII Dynoed - Cause for concern. Please help.

[des744]

Hi all,

May need some advice from some experience bros and even Technik on this. (Samir,Anthony or Zolti?)
Just have my 330 equipped with ASA TM12 @8psi dynoed. Results is a base 285 RWHP at 6250 rpm

My particular concern is this: My AFR graph TOTALLY LEANS OUT( I mean a vertical drop) right after 6100 rpm! And also a very slight AFR linear curve towards lean portion from rich after approx 4300 rpm. (even though I have already set the fuel to MAX rich after 4300rpm just to see)

I am on 315cc #22 injectors and stock fuel pump.

I am worried that either my injectors or fuel pump isnt adequate? Which is which? Upgrading to 650cc injectors and a 200 l/hr Borsch pump seems like a option now. Any comments or am i being too paranoid? Any input would be appreciated. Thanks.

[DA-MOTORSPORT]

650 CC injectors are way too big for your application and it is not a proper way to add more fuel pressure. A bigger fuel pump wont be the cure.

The best method for mapping the software, getting rid of lean and rich AFRs, and having the "desired" air fuel ratios is TSI engine management systems.

With TSI you are able to map any point on the fuel and ignition tables.

Check the thread below: "Supercharged BMWs' engine management systems"

MERT

[des744]

Thanks for the input. I am actually on a piggyback system that i use to control the AFR and even ignition timing. So far, I just spent a lot of the time tuning and re-tuning. Its running fine except for the ugly AFR starvation on the dyno graph.

Is it possible to pm me more details on this software and a quote perhaps if possible? Thanks. Much appreciated.

[Mr Paddle.Shift]

Hey des744 ,

ASA bros will come to your help. :pimpin: But first relax, grab a cup of hot tea. Nothing to panic about really.

Post your dyno-graph if you can.

I recently spoke to Kashif about this. He has a 330 with ASA SK1 running ASATronic. Here's what I recommend:

1. Upgrade to 24# injectors.
2. Reset ECU adaptation with GT-1.
3. Turn down ASATronic and richen as needed.
4. Monitor LTFT and STFT if possible.

My recommendation is based on what I have tried and tracked. When I had ASATronics, I had 19# in my 325 and had occasional lean issues. Upgraded to 330 injectors (22#), mixture is much better.

[des744]

Hi Mr paddle shift, thanks for your advice. Am already at #30 injectors while on the dyno.. Am wondering now if that fuel leaning out at 6100rpm due to rpm cut off? Seems a bit low for that.

Hey des744 ,

ASA bros will come to your help. :pimpin: But first relax, grab a cup of hot tea. Nothing to panic about really.

Post your dyno-graph if you can.

I recently spoke to Kashif about this. He has a 330 with ASA SK1 running ASATronic. Here's what I recommend:

1. Upgrade to 24# injectors.
2. Reset ECU adaptation with GT-1.
3. Turn down ASATronic and richen as needed.
4. Monitor LTFT and STFT if possible.

My recommendation is based on what I have tried and tracked. When I had ASATronics, I had 19# in my 325 and had occasional lean issues. Upgraded to 330 injectors (22#), mixture is much better.

[Mr Paddle.Shift]

Aye..cos you mentioned you were on 22# in your original post. So you upgraded to 30# in between the dyno runs?

Posting the dyno graph will help a lot cos I am quite confused with your description. When we read AFR graph here, a "drop", as in a negative gradient, means to richen not to lean out. Or maybe the dyno there uses a different convention for graphing AFR.

[TaZaM3]

Is there any add on device or software with computer to advance timing occassionally for our cars? I know the S4 guys have a program on a laptop that can tweak timing fast. This allows them to run great power for a race or dyno.

[Mike Benvo]

Is there any add on device or software with computer to advance timing occassionally for our cars? I know the S4 guys have a program on a laptop that can tweak timing fast. This allows them to run great power for a race or dyno.
Not for E46's. You can advance the timing in more difficult ways though..

[DA-MOTORSPORT]

TazaM3,

with TSI engine management system you can advance or retard timing on S54 and non M3 E46s.

TSI also changes injector duty cycle on E46. You can add fuel or decrease fuel with TSI.

TSI has a user friendly software, download onto your laptop, and dial advance or retard.

We map E46 330ci and E46 M3 SMG with TSI.

[Mike Benvo]

TazaM3,

with TSI engine management system you can advance or retard timing on S54 and non M3 E46s.

TSI also changes injector duty cycle on E46. You can add fuel or decrease fuel with TSI.

TSI has a user friendly software, download onto your laptop, and dial advance or retard.

We map E46 330ci and E46 M3 SMG with TSI.
Damn, I wan't that....

[des744]

Sorry for the confusion.... the graph actually shoots up meaning lean as you've said. Anyway, spent the whole bloody day tearing out the entire fuel system! Change fuel filter, pull out the fuel pump and placing a fuel pressure guage to monitor the fuel pressure both at the injectors railings and main pump in the rear seat. Turns out the pressure is at 7.4 bar ( which is abnormally high - am i correct? Normal should be at 3-4 bar)
Going to have to check,recheck and redo the entire fuel regulator setup!

Topic aside, anyone with SkII on a 330i pushing over 300hp on the rear wheels? I am hitting only 285.......i am begging for 15 more for the 3xx mark :(


Aye..cos you mentioned you were on 22# in your original post. So you upgraded to 30# in between the dyno runs?

Posting the dyno graph will help a lot cos I am quite confused with your description. When we read AFR graph here, a "drop", as in a negative gradient, means to richen not to lean out. Or maybe the dyno there uses a different convention for graphing AFR.

[Mr Paddle.Shift]

Maybe the person who dyno-ed your car let go of the gas at 6100rpm, in which case you should see a sudden spike in AFR? See the first dyno plot on this thread (http://www.rennsport.com/forums/showthread.php?s=&threadid=3599). That was ASA SK1 with ASATronic. Stock injectors.

Fuel pressure a tad big high. I don't have anything to compare. Still working to install some fuel pressure sensors on my car.

Btw, check your PM.

Sorry for the confusion.... the graph actually shoots up meaning lean as you've said. Anyway, spent the whole bloody day tearing out the entire fuel system! Change fuel filter, pull out the fuel pump and placing a fuel pressure guage to monitor the fuel pressure both at the injectors railings and main pump in the rear seat. Turns out the pressure is at 7.4 bar ( which is abnormally high - am i correct? Normal should be at 3-4 bar)
Going to have to check,recheck and redo the entire fuel regulator setup!

Topic aside, anyone with SkII on a 330i pushing over 300hp on the rear wheels? I am hitting only 285.......i am begging for 15 more for the 3xx mark :(

[des744]

Doubt it, he went to 6500, 6600. And the dip up in the AFR comes in while the hp curve continues.. I will try again tomorrow for the dyno graph..

My god, they are getting 275 whp for SK1? 302.9 for SK1 in Canada? What? the ambient temp at dyno was 10 deg C???? :(

Anyway, I think the best place to install the fuel sensor is at the main pump right under the right rear seat.

Checked my PM...nothing from you bro?


Maybe the person who dyno-ed your car let go of the gas at 6100rpm, in which case you should see a sudden spike in AFR? See the first dyno plot on this thread (http://www.rennsport.com/forums/showthread.php?s=&threadid=3599). That was ASA SK1 with ASATronic. Stock injectors.

Fuel pressure a tad big high. I don't have anything to compare. Still working to install some fuel pressure sensors on my car.

Btw, check your PM.