N55 Pure Stage 1, $1k to get where the N54 guys are

[loesch]

Tonight was awesome. I got a chance to run my friend who I have been in a friendly competition with since I got my car. He has a 2009 N54 that's FBO w/ meth. I need to confirm but I think he might just have a smidgen of E85 or none at all running the 93 octane BB Flash. I'm still lacking the backend flash and 3.5 bar sensor but that probably won't do much.

Here's a video before the upgrade while at the track this summer. Notice how easily he pulls away.

Jump to 44 seconds

This was tonight after the Pure upgrade. To eliminate any driver error we just did a roll in 4th starting at 55 mph up to around 70 or so. Unfortunately you can't see the N54 car so you'll have to watch the shadow from his lights. You'll get the idea though. Super close but it looks like he got about 6 inches on me. haha.

Jump to 53 seconds

Here are logs from each of us on that run...

N55
http://datazap.me/sites/default/file...20_45_17_0.csv

N54
http://datazap.me/sites/default/file...20_45_42_0.csv

[Nugget]

Is PWM the equivalent of WGDC?
If so is it safe to just have it pegged at 99%?

Dzenno said he won't tune mine above 75% as it's just pushing hot air at that point.

[MuNkY6913]

I'm only running 93 Oct with 80/20 meth water with BMS race backend. Not near a comp or I'd upload my log from that run. It's fun to compare them.

[fcman]

not bad results from a pretty inexpensive upgrade. I'm really looking forward to seeing more beastly N55s

[loesch]

Originally Posted by Nugget

Is PWM the equivalent of WGDC?
If so is it safe to just have it pegged at 99%?

Dzenno said he won't tune mine above 75% as it's just pushing hot air at that point.

Honestly I'm not sure. There are tons of us running like that though. Even the off the shelf JB4 maps will cause PWM to max out. I admit that I definitely have to work on my map 6 though. Once I get the flash done I'll get it dialed in. I was hoping for about 1psi more at 6,000rpm but you can't win em all.

[loesch]

Originally Posted by MuNkY6913

I'm only running 93 Oct with 80/20 meth water with BMS race backend. Not near a comp or I'd upload my log from that run. It's fun to compare them.

Uploaded your log in the OP

[MuNkY6913]

Originally Posted by loesch

Uploaded your log in the OP

Sweet! Thanks buddy!

[mike@x-ph.com]

That N54 is doing a great job at holding that much boost at higher RPM.
As for the N55 , i would send the logs to Terry cz it looks like you are running the turbos too hard for their own good.

[loesch]

Originally Posted by mike@x-ph.com

That N54 is doing a great job at holding that much boost at higher RPM.
As for the N55 , i would send the logs to Terry cz it looks like you are running the turbos too hard for their own good.

Like I said, my tune needs some work. I'm getting my vanos recall taken care of and some other stuff. Once I get my car back I'm going to do the bms flash + 3.5 bar TMAP sensor and get serious about setting up a daily tune and kill mode tune. Then we'll go to the dyno and see where we both stand.

[MuNkY6913]

Can't wait to get to the dyno again. Hope I get my Turbos replaced this winter. They rattle so bad. Sounds like I have cans on a string dragging behind the car.

[Newguy123]

Lower your targets in the high revs man your car will run better.
looking at that log I would say target 18 and taper down to 15-16psi at 6k MAX.

[Reapur]

Originally Posted by MuNkY6913

Can't wait to get to the dyno again. Hope I get my Turbos replaced this winter. They rattle so bad. Sounds like I have cans on a string dragging behind the car.

Check your vacuum system. A cracked vacuum line was causing weak vacuum in the system. I repaired it and my WG rattle almost entirely disappeared

[NORAGRETS]

not hating on you or knocking anything about the Pure turbo upgrade...

1 question: pure website shows a pretty minimal increase in HP and TQ over stock on their dyno...about +10 hp and +10 tq...is it WORTH all that trouble for small gains? or is Pure showing a dyno graph with JUST a turbo upgrade, no other mods?

Seems like "$1000" for a turbo replacement is a little...cheap? for bmw standards...kind of sucks but pretty much everything "good" in aftermarket parts for BMW's cost an arm and a leg...hey if its cheap and works well, Im sold, but after part cost and labor cost, is it that much of a difference?

[Newguy123]

Originally Posted by Twhill19

not hating on you or knocking anything about the Pure turbo upgrade...

1 question: pure website shows a pretty minimal increase in HP and TQ over stock on their dyno...about +10 hp and +10 tq...is it WORTH all that trouble for small gains? or is Pure showing a dyno graph with JUST a turbo upgrade, no other mods?

Seems like "$1000" for a turbo replacement is a little...cheap? for bmw standards...kind of sucks but pretty much everything "good" in aftermarket parts for BMW's cost an arm and a leg...hey if its cheap and works well, Im sold, but after part cost and labor cost, is it that much of a difference?

20-120 it's 2-3 cars faster. Holds better boost to redline. 17psi at 6k is pretty damn good

[loesch]

Originally Posted by Twhill19

not hating on you or knocking anything about the Pure turbo upgrade...

1 question: pure website shows a pretty minimal increase in HP and TQ over stock on their dyno...about +10 hp and +10 tq...is it WORTH all that trouble for small gains? or is Pure showing a dyno graph with JUST a turbo upgrade, no other mods?

Seems like "$1000" for a turbo replacement is a little...cheap? for bmw standards...kind of sucks but pretty much everything "good" in aftermarket parts for BMW's cost an arm and a leg...hey if its cheap and works well, Im sold, but after part cost and labor cost, is it that much of a difference?

Yeah the dyno charts I've seen this far seem to be all over the place. I'm hoping to get on the dyno before they ruin the roads here for the winter because I'll have a very good before / after. I'm still working on getting the tune right with the backend flash and 3.5 bar TMAP sensor. People seem to be seeing up to 60+hp increase higher up in the RPM range where it matters. I feel a very pronounced difference as well. I did the work myself. It was a good learning experience and I would definitely do it again if I had the chance. Pure really aren't changing much so the price fits. Their stage 2 turbo will be a different story.

[NORAGRETS]

Originally Posted by loesch

Yeah the dyno charts I've seen this far seem to be all over the place. I'm hoping to get on the dyno before they ruin the roads here for the winter because I'll have a very good before / after. I'm still working on getting the tune right with the backend flash and 3.5 bar TMAP sensor. People seem to be seeing up to 60+hp increase higher up in the RPM range where it matters. I feel a very pronounced difference as well. I did the work myself. It was a good learning experience and I would definitely do it again if I had the chance. Pure really aren't changing much so the price fits. Their stage 2 turbo will be a different story.

that would be the best kind of info. real life data. im subscribed so post as soon as you have time to dyno, thanks!

[MuNkY6913]

Originally Posted by Reapur

Check your vacuum system. A cracked vacuum line was causing weak vacuum in the system. I repaired it and my WG rattle almost entirely disappeared

Nice. Thanks for the tip. I'm gonna have to check that out.

[loesch]

Originally Posted by Twhill19

that would be the best kind of info. real life data. im subscribed so post as soon as you have time to dyno, thanks!

It doesn't look like I'm going to make it to a dyno this year. Winter is closing in fast so I tried scheduling a time with my local dyno operator for Nov 1st. He just emailed me letting me know that he had a catastrophic failure of his wideband and he's decided to close up for the year and move the dyno to his new location. There is a dyno day in NJ I'd love to go to but it's at the end of November and 4 hours from me. I really doubt I'll be able to make it there.

[FOACAD]

Originally Posted by Twhill19

not hating on you or knocking anything about the Pure turbo upgrade...

1 question: pure website shows a pretty minimal increase in HP and TQ over stock on their dyno...about +10 hp and +10 tq...is it WORTH all that trouble for small gains? or is Pure showing a dyno graph with JUST a turbo upgrade, no other mods?

Seems like "$1000" for a turbo replacement is a little...cheap? for bmw standards...kind of sucks but pretty much everything "good" in aftermarket parts for BMW's cost an arm and a leg...hey if its cheap and works well, Im sold, but after part cost and labor cost, is it that much of a difference?

I know this is a few months old but still feel like it needs to be said for others searching.

This upgrade isn't about getting peak power gains. Look at their dyno charts and see all the gains up above 4000rpms. It's a HUGE gain in the 4000+ range. That's where the n55 normally falls on its face and loses races. With this upgrade you pull and pull and pull all the way to redline.

It's a stock turbo with upgraded internals allows better flow up top.

It is the best bang for buck upgrade imo if you are looking for more usable power in straight line races.

[Solo_M_Tech]

I don't understand why people say the N55 falls on it's face at "4k" rpms etc. Mine pulled hard all the way to 6200 rpms or so. Stock. Now with the JB4, kittyless DP, intake, and CP, My N55 has no dicernable lag, and pulls hard to redline. Boost taper starts at 5k rpms. From 17 psi to 14.5.

[fcman]

Originally Posted by HooningB2G

I don't understand why people say the N55 falls on it's face at "4k" rpms etc. Mine pulled hard all the way to 6200 rpms or so. Stock. Now with the JB4, kittyless DP, intake, and CP, My N55 has no dicernable lag, and pulls hard to redline. Boost taper starts at 5k rpms. From 17 psi to 14.5.

I'd be curious to know what else you've driven, since turbo cars pretty much all have the drop off. Coming from an S2000 the N55 torque drops off so strongly that I find myself shifting at 5k rpms thinking that I'm coming up on redline.

[loesch]

Originally Posted by HooningB2G

I don't understand why people say the N55 falls on it's face at "4k" rpms etc. Mine pulled hard all the way to 6200 rpms or so. Stock. Now with the JB4, kittyless DP, intake, and CP, My N55 has no dicernable lag, and pulls hard to redline. Boost taper starts at 5k rpms. From 17 psi to 14.5.

It's definitely still a damn fast car with the stock turbo but once you get to feel the power continue to increase through the rev range with an upgrade you'll realize why lots of people say it falls on it's face.