Ive been browsing these forums for a while now, and I noticed that Mr. Terry Burger has been asking about the Map sensor and about how overboost works, etc. Just wondering if he's producing any resistor-type tuning devices for the R56 in the future, and if so what kind of time frame there would be until he'd start selling it etc. Ive been a long time lurker over on e90post and when I saw the name Terry I couldnt halp bu look into it a little further. His web site is www.burgertuning.com/

 

check out this post https://www.northamericanmotoring.co...d.php?t=126703

 

Hey Com, we should have our car in the next few weeks and plan to get going on a JB right away.

 

ya, I was a little late on the post, saw that you made an introduction and all, kind of looking forward to somw new tuning alternatives

 

Thanks.. maybe you can help with market research. What are R56 owners looking for?

 

We want precisely what your advert says "35-45whp and 35-60 wtq for less that $379" .........(or atleast somewhere close to those numbers )

Oh, and if beggars could be chosers, we would like that ASAP. :D

 

Hehe well that is the 335i banner, we just threw it up here for now. No promises, but I think 30rwhp is reasonable.

 

if you're aiming for ANY rwhp increases I think you may need to do a bit more research

best of luck.

 

Im looking for a company thats not afraid to post some stock vs. modded dyno charts, almost seems like the r56 community shy's away from the dyno

 

I live and die by the dyno. If I can't make hp I'm not afraid to show before and after dynos and saying it just didn't work out. But I know there is HP to be made here.

 

yep, I have yet to see a before and after dyno of an stock R56 vs. the same car with an Alta ECU and NO other mods

 

The key is using a dynojet, to establish numbers others can recreate and verify. Full load dyno dynos are great for tuning, but when it comes time to post numbers its best to take them on a dynojet.

 

Double post

 

Speaking of dynojet numbers, does anyone have an R56 dynojet run with the air/fuel ratios logged?

 

If you need them by rpm let me know. Stock R56, first run(blue) was after it sitting a while, look at the drastic changes in a/f.


AF ratio on the 2nd and 3rd runs go lean at about 5,700-5,800 and the start to go rich again. Those where on 3rd gear the only 4th gear pull I did goes off the scale rich after 4k rpm

 

Those air/fuel ratios look very strange. Is it possible there was an issue with the sensor or placement?

Attached is a stock 335i graph with air/fuel for reference. I would expect to see a similar curve, 14.5:1 in the midrange down to 12.5:1 up top. But to drop off the scale seems very odd.

 

Sensor was on tailpipe with innovate clamp.

BTW from the looks of the graph you posted it looks like it stays on top at 13.5 - 13.0 not 12.5

 

That particular dyno just reads a bit lean, probably needs a new sensor. But the 335i air/fuel ratios are generally 14.5 mid down to 12.5 up top. On the JB2 we remap them to around 13.2:1 mid down to 12.0 up top.

Have you seen any other R56 dynos with air/fuel ratios, to determine if yours is normal or not? I would expect all air/fuel ratios from different runs on the same day to be grouped pretty close together.

 

Here are the other runs. I know the first run is a bit wierd thats why I mentioned it was after the car turned off for a while.

Here you can see what I ment on the 2nd and 3rd runs on 5,700, look at how the power lines start to spike when it goes lean up top, not good at all. Sorry have not had a chance to see other R56 runs.

Runs 2, 3, and 5 (that was on previos graph)

 

I would probably say those dips, etc, are not related to the air/fuel ratios. Probably a little knock retard, or normal dips due to the car adapting to the load of a dynojet. What octane fuel do you run?

But the air/fuel ratios are strange indeed. I have a portable LM1 and will be monitoring the ratios as soon as I get the car. In the mean time I'll continue looking for other R56 charts for reference.

 

I run 93. About the wideband I have a zeitronix from my previous car its just that I dont want to tap the stock dowpipe for the sensor... One day Ill see if I can borrow an Innovate ventury clamp from a friend but then again there the cats getting in the way.

 

I just use the Innovate tailpipe clamp as well. Partial throttle readings will be inaccurate, but usually at wide open throttle after 2k RPM or so there is enough volume that the cats don't effect the reading much.

 

i want some juice

 

OK just did a quick search and found more wacky air/fuel curves! So this begs the question, are the air/fuel ratios really jumping around like this, or is there an issue with how we're reading them.

Two of the charts look like 14.5:1 in the mid down to 11-12:1, which is what one might expect to see. But the first?

 

Is this thing just a map clamp or what? How does it work?

Thanks,
Josh

Also, did the cars seeing the weird o2 sensor dips get the update to correct the o2 sensor range? I had it done on my car and the power up top feels much smoother. It could be this, as the "recall" was an improper voltage range on the front o2 if I'm not mistaken.