[-Eidos]

Originally Posted by johnung

Hey congratulations! 455whp using 93 pump gas is fantastic! I marked up your dyno graph (please see attachment) to illustrate the two things that jump out at me.

First, with the Pure500, you have the same stock turbo torque early on by 2500 rpm. So it’s equally responsive, plus then torque goes much higher.

Secondly, you have a big power increase but more importantly it stays high towards redline instead of dying off like the stock turbo.

Enjoy driving it!

The shape of the Pure 500 torque curve seems to be slightly flatter, but it hits the same torque numbers as the stock turbo at 2500 rpm. This is what wheela was hinting at with how bigger turbos can hit the same torque numbers at x RPM.

[AmuroRay]

Originally Posted by -Eidos

The shape of the Pure 500 torque curve seems to be slightly flatter, but it hits the same torque numbers as the stock turbo at 2500 rpm. This is what wheela was hinting at with how bigger turbos can hit the same torque numbers at x RPM.

just because it's not at "full spool" doesn't mean it's not making power.

[wheela]

Originally Posted by Ice_ken

Link to high res
Numbers are WHP/WNM torque. Dynojet dyno.


Blue: FBO OTS BM3 Stage 2 (another M2, not mine)
Red: Mine; FBO, Pure P500, Dorch DS15. OTS BM3 Stage 2 Full spec below
Green: Mine; FBO, Pure P500, Dorch DS15. HC Performance custom map.

2017 F87 M2 N55 manual:
Engine upgrades:
-Pure500 turbo
-Turbosmart DV11 divertervalve
-Dorch DS15 HPFP
-FTP inlet pipe
-DO88 intercooler, boost and charge pipe.
-N20 sparkplugs
-N20 3.5Bar mapsensor
-Speed engineering airscoop
-DO88 bigger oilcooler
-Wagner sportcat
-Tune by HCP

Comment by tuner: could use a bigger intercooler. Wagner EVO 2 competition for example.

Overal happy with the graph, looks like it makes tons of torque and power. Now just need to pick the car up.

Wow, that's on 93 octane? Congrats on some great numbers, I didn't expect that from P500 on 93 only! Do you have any logs you'd be willing to share from the pulls?

[BimmerHausPerformance]

Originally Posted by CanadianM2

When I enter my address and also my shops address it says they do not offer shipping to this location I’m in Nova Scotia

Unfortunately it is just my site that cannot calculate shipping charges. Please reach out to me and I can quote directly. Also, if you need anything else, I am able to do package deals for a discount. I can do HPFP, b58 coils, turbo smart BOV, for example.

[ThreeStripes]

Originally Posted by Ice_ken

Numbers are WHP/WNM torque. Dynojet dyno.

Nice. Thanks for sharing. Been after this for a while.

[Sparky68]

Originally Posted by Ice_ken

Link to high res
Numbers are WHP/WNM torque. Dynojet dyno.


Blue: FBO OTS BM3 Stage 2 (another M2, not mine)
Red: Mine; FBO, Pure P500, Dorch DS15. OTS BM3 Stage 2 Full spec below
Green: Mine; FBO, Pure P500, Dorch DS15. HC Performance custom map.

2017 F87 M2 N55 manual:
Engine upgrades:
-Pure500 turbo
-Turbosmart DV11 divertervalve
-Dorch DS15 HPFP
-FTP inlet pipe
-DO88 intercooler, boost and charge pipe.
-N20 sparkplugs
-N20 3.5Bar mapsensor
-Speed engineering airscoop
-DO88 bigger oilcooler
-Wagner sportcat
-Tune by HCP

Fuel: EU 98 Shell V-Power -> US 93.

Comment by tuner: could use a bigger intercooler. Wagner EVO 2 competition for example.

Overal happy with the graph, looks like it makes tons of torque and power. Now just need to pick the car up.

Good numbers , I'd be happy with those.
Was hoping to fit mine this Saturday if the rest of the bits I ordered arrive. May have to switch to 100% meth until I can fit a Dorch.

[3t3p]

Great data and the custom tune wow Vs OTS.

You'd really be leaving a lot on the table going OTS but it's still an option the car will run better than before.

So pure 500 literally does make 500 bhp on pump fuel with a custom map.

Amazing thanks again for the info and dynos. Please keep sharing thoughts on driving and anything else related!

[5w20]

Full e85 through an automatic, not a DCT or manual.

Owner hasn’t responded with the full mod list.

[M2guru]

For those with a Pure750, can you take a picture of your wastegate adjustment nuts? I had to adjust mine recently to near the end of its adjustable range (closest to the actuator) and am wondering if this will be a problem soon (i.e., I won't be able to adjust it any further). Thanks!

[AmuroRay]

Originally Posted by M2guru

For those with a Pure750, can you take a picture of your wastegate adjustment nuts? I had to adjust mine recently to near the end of its adjustable range (closest to the actuator) and am wondering if this will be a problem soon (i.e., I won't be able to adjust it any further). Thanks!

Attachment 3494887

Is it possible Pure sent out another defective unit? I can't imagine this is supposed to be normal.

[johnung]

Originally Posted by M2guru

For those with a Pure750, can you take a picture of your wastegate adjustment nuts? I had to adjust mine recently to near the end of its adjustable range (closest to the actuator) and am wondering if this will be a problem soon (i.e., I won't be able to adjust it any further). Thanks!

Attachment 3494887

Call Pure and ask. I’ve always found them to be very helpful

[johnung]

Originally Posted by 3t3p

Great data and the custom tune wow Vs OTS.

You'd really be leaving a lot on the table going OTS but it's still an option the car will run better than before.

So pure 500 literally does make 500 bhp on pump fuel with a custom map.

Amazing thanks again for the info and dynos. Please keep sharing thoughts on driving and anything else related!

I used to make that common assumption that a lot is being left on the table with an OTS tune. But now I don’t believe that necessarily the case. I’ve been recently immersed in the tuning process and I’ve been learning a lot from ZM2 who has been doing it for years with his M2 daily & track car.

I’m involved with the tuning of my N55 EWG Pure500. It began by using the OTS Bootmod3 Stage2+ MultiMap FlexFuel tune as a base to start. The Pure500 on the OTS tune was immediately responsive with no delay/lag compared to the stock N55 EWG turbo. There was a definite increase in power, and that power seemed to sustain much longer towards redline. The stock N55 EWG is known to die off at high revs.

With each subsequent tune revision those positive attributes increased. The responsive torque seemed to increase. The same for horsepower as it seemed to increase and sustain towards redline. Of course these are the impressions of my butt dyno as I drove each revision and collected engine logs.

As the tuning process progresses and boost levels are increased, the capacity of the turbo gets closer. Those positive attributes begin to diminish/disappear. The most obvious change is to the horsepower curve. Ideally the horsepower curve should look like a high flat plateau that sustains its power towards redline. This is absolutely ideal for daily driving and for tracking, a very strong broad power delivery.

So a sharp tuner pushes the tune as close to the turbo capacity as possible while keeping things consistently strong. It’s usually obvious when a tuner has gone too far if the horsepower curve no longer looks like a high flat broad plateau. Instead it looks like a peak that quickly drops off. I call it a bragging rights tune. It totally sacrifices drivability just for a horsepower number.

This tune is being designed in an OTS manner. By that I mean that we don’t care about achieving a high horsepower/bragging rights number. It will be responsive and quick, with high power increase that sustains towards redline. It will be safe and reliable. A FlexFuel tune for a Pure500 that’s designed to be drivable and fun as a daily driver, or a as weekend track car.

First dyno of the latest tune revision next week. Anxious to see the graphs and values, and go from there with the tuning.

[VGSON]

Originally Posted by AmuroRay

Is it possible Pure sent out another defective unit? I can't imagine this is supposed to be normal.

which area /location is this taken from? underneath?

[AmuroRay]

Originally Posted by VGSON

which area /location is this taken from? underneath?

I didn't take the photo, but I believe he's looking from above, just based on what I'm seeing.

https://f30.bimmerpost.com/forums/sh....php?t=1652190

[VGSON]

Originally Posted by AmuroRay

I didn't take the photo, but I believe he's looking from above, just based on what I'm seeing.

https://f30.bimmerpost.com/forums/showthread.php?t=1652190

i can try…my broad ass wasn’t squeezing underneath.

[AmuroRay]

Originally Posted by VGSON

i can try…my broad ass wasn’t squeezing underneath.

Ignore the red circle in the picture, it's actually slightly to the right of it. What you're looking for is that whole arm area and seeing how much it's been adjusted on the screw. The screw is what allows more/less range of movement of that lever and arm.

Edit:

[M2guru]

It was challenging to get a good picture of it with my phone. It's from above. This is the area of interest:



The threaded rod is actually much longer than what can be seen in that shot shared above. This is a pic from Bimmerworld's website of the EWG and the actual length of the threaded portion.



I haven't contacted Pure yet because I am just starting to do research. Trying to figure out what my positioning looks like relative to others. This will be the next step.

[AmuroRay]

Originally Posted by 3t3p

Great data and the custom tune wow Vs OTS.

You'd really be leaving a lot on the table going OTS but it's still an option the car will run better than before.

So pure 500 literally does make 500 bhp on pump fuel with a custom map.

Amazing thanks again for the info and dynos. Please keep sharing thoughts on driving and anything else related!

Yes, you do leave "a lot" on the table with the OTS tune versus a custom one. The word "a lot" is relative, it's based on drivability, power delivery, safety and yes, addition power. So while absolute gains may only be 20whp at peak, there can be more benefits than just power itself and more gains as area under the curve. A custom tune is tailored to your mods and how you use the car. Often times tuners can make the same, or more power on the same boost or timing.

There is a reason why Halim offers tunes, because the OTS is not a catch all for all situations. I posted a dyno from WG Motorworks that showed a substantial gain under the curve versus a OTS tune. My car made the same power as a FBO N55 with 2psi less in "Comfort mode" on the dyno. The Sport+/DSC off tune makes more power.

[3t3p]

Thanks for info re OTS, it's really great to know I could use my MHD license to get something out of a turbo upgrade.
Am I right in thinking that as it is more conservative reliability could or would be better than is pushed too far into the turbo's efficiency range?

How does OTS tune allow more power to redline when currently on MHD at least, it drops off a bit ?
Is it dropping off because DME is sensing parameters or is it actually built into the tune?

If the latter why does a turbo upgrade suddenly let it sustain power for longer?

And it sounds like as good as a custom tune is, when pushing things further spool is more noticeably as higher boost pressures are generated? On posted graphs it looks 150-200 rpm later than stock? Blue line Vs red

[Sparky68]

OK all fitted and ready to go. Standard turbo vanes looked ropey so a good time to upgrade I guess also the turbo boost pipe is deteriorating so need to fit a after market one. ( any suggestions ) ?

When I remap it with the Bootmod3 do I have to do anything for the 3.5bar map sensor?

[Sparky68]

What abusing your turbo does.

[ThreeStripes]

Letting it loose on E50 on track today. Will be out playing with a pal in a G80 CS which will be a nice benchmark to compare acceleration against because that thing is fast.

Will have a dyno chart to contribute soon.