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Terry @ BMS's Avatar
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Default 05-27-2015, 09:21 AM

Looks solid! Have PWM for that last log?


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Default 05-27-2015, 09:49 AM

I think the 7" fmic has big pressure drop. Hence the big boost drop after 5.5k rpm. Just for the fun of it try a run with stock fmic on the dyno. I am sure it will hold more boost towards 6.5k rpm.


F21 M140i - 100-200: 6.95
Audi TTRS - 100-200: 4.47 60-130: 5.16
F80 M3 - 100-200: 4.45, 60-130: 5.1
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 05-27-2015, 09:53 AM

A larger flowing IC should present less of a restriction and allow the turbo to build higher boost levels within the intake manifold.


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Default 05-27-2015, 09:56 AM

Quote:
Originally Posted by Terry @ BMS
A larger flowing IC should present less of a restriction and allow the turbo to build higher boost levels within the intake manifold.
Then the vtt turbo is not performing as it should. Wasnt this one produced in china?

I forward you some of my datalogs when i still had stage1 pure.


F21 M140i - 100-200: 6.95
Audi TTRS - 100-200: 4.47 60-130: 5.16
F80 M3 - 100-200: 4.45, 60-130: 5.1
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 05-27-2015, 09:58 AM

Quote:
Originally Posted by darkiedm4
I think the 7" fmic has big pressure drop. Hence the big boost drop after 5.5k rpm. Just for the fun of it try a run with stock fmic on the dyno. I am sure it will hold more boost towards 6.5k rpm.
i was holding just a hair under 19psi at 6k with my pure stage 1 on stock fmic.


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Default 05-27-2015, 09:59 AM

My forge fmic that i had on the car for few weeks only allowed 15 psi at 6k rpm and 14.5 at 6.5 k rpm. With the wagner fmic i did 17 psi at 6.5k rpm still.


F21 M140i - 100-200: 6.95
Audi TTRS - 100-200: 4.47 60-130: 5.16
F80 M3 - 100-200: 4.45, 60-130: 5.1
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 05-27-2015, 10:36 AM

Quote:
Originally Posted by darkiedm4
I think the 7" fmic has big pressure drop. Hence the big boost drop after 5.5k rpm. Just for the fun of it try a run with stock fmic on the dyno. I am sure it will hold more boost towards 6.5k rpm.
Meh...not really going to get in to a debate over FMIC's and don't plan on putting the stock one back on. May throw a Wagner on there when it gets it's next upgrade though.

Really not interested in making this a VTT vs. Pure thread either but I'll give you a bit of reference.

At NFZ, we ran against a Pure car a couple times and it was a 235i, not sure if it was DCT or the specs though. It was pretty even but it definitely didn't lose ground. We brought the car back and baselined it with the same tune and fuel at 5.31 seconds. We are now at 4.97. This is not to compare it against that car as I'm sure it could have been further optimized as well but I would say those are fairly decent gains since then and it did 413/458 on the dyno at that time.



Quote:
Originally Posted by Terry @ BMS
Looks solid! Have PWM for that last log?
Sure, here is the image and the log.

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052615_40-130_23psi.csv



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Default 05-27-2015, 10:42 AM

Yes i dont want to make it a vendor x vs vendor y either.

You have my data. 1.5 sec on 60-130 is A LOT


F21 M140i - 100-200: 6.95
Audi TTRS - 100-200: 4.47 60-130: 5.16
F80 M3 - 100-200: 4.45, 60-130: 5.1
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 05-27-2015, 11:00 AM

Quote:
Originally Posted by darkiedm4
Yes i dont want to make it a vendor x vs vendor y either.

You have my data. 1.5 sec on 60-130 is A LOT
Yes, thanks I'll look it over. Wasn't really trying to optimize the 60-130 times but do an apples to apples comparison. There are a few other variables that are probably contributing to that as well. We are not DCT, we are an E90 that is full weight and had 3/4 of a tank of fuel, we are at 1200', we are not spraying meth, and it was 73 degrees.



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Default 05-27-2015, 01:27 PM

Looking at PWM I'm sure there is more room in the midrange. Maybe could get up to 26psi? Not sure if it would add any torque. But would be a good fueling test!


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Default 05-27-2015, 01:35 PM

26psi on a stage 1? thats a lot of back pressure and im sure that turbo wouldnt last long up there.


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Default 05-27-2015, 02:33 PM

Quote:
Originally Posted by Newguy123
26psi on a stage 1? thats a lot of back pressure and im sure that turbo wouldnt last long up there.
True, but we are testing and don't plan on putting many more miles on this turbo.



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Default 05-27-2015, 10:54 PM

Yes that midrange boost is nuts


F21 M140i - 100-200: 6.95
Audi TTRS - 100-200: 4.47 60-130: 5.16
F80 M3 - 100-200: 4.45, 60-130: 5.1
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 05-28-2015, 07:22 AM

Quote:
Originally Posted by Newguy123
i was holding just a hair under 19psi at 6k with my pure stage 1 on stock fmic.
Wow, that's impressive. After what I just went through trying to get all my boost leaks fixed, I would be willing to bet there are many people that have small leaks after an intercooler install and never know it. That could be contributing to people seeing pressure drop with some of these intercoolers.

Last edited by loesch; 05-28-2015 at 07:28 AM..
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Default 05-30-2015, 08:33 PM

Wait I have been gone for a while. If I'm reading correctly youre running 20psi midrange and holding decent boost on E75 with just a stage 2 fuelit LPFP? How lol


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Default 06-01-2015, 01:28 AM

Going on the dyno tomorrow morning so did a little testing and tuning on 100% E85.

When we filled up on E85 yesterday initial testing didn't go so well and I had to lean out the target AFRs a bit or we'd get misfires. Still after making changes I found that I had to let the car adapt a bit by starting the first pull at about 3K and then subsequent pulls were fine starting out at 2.5K.

One thing I've noticed is the car definitely runs cooler on 100% E85. Doing all these pulls and running around today in 100+ temps, the cars oil temps stayed around 230. This is similar to what we've seen with the N54 as well. Prior the N55 would easily hit 250 and stay around 240-245 the rest of the time. Now it only hit 250 on the 3,4,5 pull and then dropped back down to 230 fairly quickly.

On to the testing.

25psi at tip in didn't net us the fastest times according to the VBOX.

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We then did a 3,4,5 targeting 24psi...again, it wasn't the fastest.

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22psi was actually the fastest.

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Still have a little tuning to do. Wanted to get back and adjust the scalars and the fuel tables a bit and will resume tomorrow on the dyno.



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Default 06-01-2015, 07:31 AM

Good luck on the dyno! Curious what you will get.


F21 M140i - 100-200: 6.95
Audi TTRS - 100-200: 4.47 60-130: 5.16
F80 M3 - 100-200: 4.45, 60-130: 5.1
F20 M135i (sold) - 100-200: 6.26 , 60-130: 7.4
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Default 06-01-2015, 03:19 PM

I'm curious on the FOL 0 thing. You say you are doing that because you have a BEF. I'm currently running the BMS BEF for N55. Should I have my FOL at 0? Or 60 like I have been?

Also can you post your boost values and duty bias values for those 22 and 23 psi runs?
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Default 06-04-2015, 11:49 AM

Steve, as long as you're in a sharing mood, would you mind sharing your Fuel (Spool) table? I'd love to see what you're working with there.

Thanks!

-Bryan



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Default 06-08-2015, 02:08 PM

Not quite what I had in mind.



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Default 06-08-2015, 04:59 PM

Quote:
Originally Posted by Foacad
I'm curious on the FOL 0 thing. You say you are doing that because you have a BEF. I'm currently running the BMS BEF for N55. Should I have my FOL at 0? Or 60 like I have been?

Also can you post your boost values and duty bias values for those 22 and 23 psi runs?
The FOL is going to depend on what your scalars in the flash are set for, the fuel mix you're running, and your particular circumstances. The ones in the flash are a good compromise to suit most user's needs. Of course given what we do, we tend to dial those in and consequently we zero out the FOL setting. We'll still use them from time to time when changing mixes or tuning on the fly though.

As for the boost and DB curve...sure, will post those in a bit (wife has that car) but only have them for the 22psi curve that it's currently running.

Quote:
Originally Posted by fryj00
Steve, as long as you're in a sharing mood, would you mind sharing your Fuel (Spool) table? I'd love to see what you're working with there.

Thanks!

-Bryan
Sorry, missed this. We haven't made any adjustments to that.

Name:  spool.jpg
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Default 06-08-2015, 05:02 PM

Here's the boost curve from the most recent dyno...you can pretty much figure it out from this but we'll still post a screen shot of our user adjustment screen so you have the hard numbers and DB numbers.




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Default 06-08-2015, 05:14 PM

Dyno numbers???
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Default 06-08-2015, 11:47 PM

Quote:
Originally Posted by Foacad
Dyno numbers???
In CA with BMS we did 413/458 on a dynojet.

Back in AZ, we did 400/461 after getting an N20 TMAP and doing a little tuning. However that was on the Maha that we baselined at 240/250 when the car was completely stock on 91 octane. The car is now running 100% E85.

Also, as promised here is the UA tab for our dyno run with our DB and map 6 settings.

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Default Vargas stage 1 - 06-09-2015, 05:00 AM

hi Steve

i also have the vargas stage 1 turbo FBO but no BEF.

can you please look at my logs and see where i can improve.

this is without ethanol and on 91 and 80/20 meth
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