[iuhutch]

Originally Posted by JETmn

Yep! Had it in for about 6 weeks I think. I love that it will put decently to near redline now and not fall on its face at 5500!

No joke, everyone i know with it absolutely loves the gains, especially for the price. What map are you running now?

[JETmn]

Originally Posted by iuhutch

No joke, everyone i know with it absolutely loves the gains, especially for the price. What map are you running now?

Running map 2 right now, but since the roads are finally clearing up some I will be going to map 6 soon. I was running map 5 most of the time with it, but the wife was driving at put 93 in, so I went to 2.

[rhm135]

Going to meet up with some N54 guys tonight and see how my N55 Pure does! A couple RB setups, a couple FBOs and one with a 6266 single turbo.

[tkong]

Originally Posted by rhm135

Going to meet up with some N54 guys tonight and see how my N55 Pure does! A couple RB setups, a couple FBOs and one with a 6266 single turbo.

Get some video!

[rhm135]

Originally Posted by tkong

Get some video!

Will do

[DrRobert]

Hey guys,

I just finished reading all 81 pages of this thread. I might have missed a thing or two, but it seems like most of the people posting here who have the Pure Stage 1 turbo are using JB4s and are running either eth or meth, and either race or track their cars. This is awesome to see how much power you guys are getting from your N55 cars, but my driving style is different from yours and I'm trying to figure out if this turbo upgrade is for me.

My car is a 2011 335i w/ N55. It is my spirited daily driver and I am more interested in improving submaximal (to borrow a medical term) engine performance rather than pushing it to its limit. I should say that my DD is an hour each way and includes some really fun country/mountain twisty backroads - the most fun I have these days is driving my car to and from work and I want to make it as awesome as possible for driving on public roads. I just had a new FMIC and CP installed but don't plan on DP or exhaust upgrades. We only get 91 octane gas here in CA and I don't have access to E85 near my home nor any plans to add a meth kit. I saw the PT dyno on 91 gas w/ FBO but no real world users on lousy gas. So my questions are:

1. Anyone have a Pure Turbo and running plain 91 octane gas?
2. Anyone running one with a custom PTF/Cobb tune?
3. What sort of gains can I expect with Stage 1 turbo on 91 gas with FMIC and a custom tune?
3. If I get one do I have to install FF wires or LPFP if I'm not running E85 or meth?

Thanks guys, appreciate it!

Robert

[paradoxical3]

I would not have purchased the upgrade if all I could run was 91 octane gas. You won't be able to turn up the boost much beyond the stock turbo without flatlining on timing.

[weehe126]

Originally Posted by paradoxical3

I would not have purchased the upgrade if all I could run was 91 octane gas. You won't be able to turn up the boost much beyond the stock turbo without flatlining on timing.

x2

The stock turbo cant hold much above 15psi to redline. But with 91oct you are probably only seeing 12-13 psi before timing gets pulled. So probably is not worth it unless you get better fuel.

[loesch]

That's correct. You can just barely max out the stock turbo on pump gas. I'd assume you would feel a little better pull at higher revs and no noticeable increase in turbo lag but it would be minimal.

[DrRobert]

Thanks for the replies. Pure Turbos had some decent gains on 91 octane on the dyno. Granted their car is FBO and mine is not, but still. This is from post #474 on page 22 of this thread:

Originally Posted by Pure Turbos

91 pump
map 2
went from 297whp to 342whp (at same boost levels)

297whp was 72 degree ambient
342whp was 88 degree ambient

They also said in post #435 on page 20:

Originally Posted by Pure Turbos

You don't need e85 or meth to enjoy the upgrade turbo. You need e85 or meth if you want to max out the turbo.

Was hoping that someone else who has actually tried running this turbo on pump gas could chime in.

[loesch]

I forgot all about that. You got me thinking though. I looked back on some logs I have and I can't find one on 93 octane that got to more than 11.5psi at 6000rpm on the stock turbo. With E85 (stock turbo) I did 12.5psi at 6000rpm. With Pure Turbos Stage 1 I now run 15.2psi @ 6000 rpm on E85. I hope this helps.

[ShlemonboostedM]

Originally Posted by DrRobert

Thanks for the replies. Pure Turbos had some decent gains on 91 octane on the dyno. Granted their car is FBO and mine is not, but still. This is from post #474 on page 22 of this thread:

They also said in post #435 on page 20:

Was hoping that someone else who has actually tried running this turbo on pump gas could chime in.

I run 93 Oct currently .. But I have meth laying around waiting to be installed .. Anyway .. The gains with e85 or 100oct on this turbo is huge compare to stock turbo .. It's becoming absolute animal with higher octane .. On 93 Oct it's noticeable maybe around 12-15whp gain .. But not that dramatic .. I suggest for you to get meth .. And enjoy this turbo to the fullest ... I'll install my meth kit after winter .. It's snowing blah blah and it's so cold that I can get traction what's so ever on 93 alone .. So putting meth will be stupid now .. This is the best mod money can buy for n55 .. I'm going to dyno my car by the end of December on 93 pump on map 2 too see true power of it on pump gas only ... But I'm not expecting much gains their .. I'm fbo f30 335i ..

[paradoxical3]

Dr Robert, look at the log for their 91 octane run. It was horrible and when I mentioned it they said it was not meant to be a daily representation of a safe log, but rather to show the boost that the turbo can hold. If you run that boost level on 91 octane you will constantly knock and damage your engine.

[Pure Turbos]

Originally Posted by paradoxical3

Dr Robert, look at the log for their 91 octane run. It was horrible and when I mentioned it they said it was not meant to be a daily representation of a safe log, but rather to show the boost that the turbo can hold. If you run that boost level on 91 octane you will constantly knock and damage your engine.

No, there was no log to go with that dyno run. We were pulling RPM data from the OBD2 port during the dyno and it was interfering with the JB4 so we couldn't log. That bad log that shows timing retard was map 6 high boost on 91 pump, testing the turbo on the street. The PURE Stage 1 provides greatly improved top end performance for ANY octane fuel.

[DrRobert]

Pardon my ignorance, but I don't know how to read all the details of those graphs and charts that have been posted (I'm smart enough to see if one line is higher than another but can't really tell a good log from a bad one). I just want my car to be as fun to drive on public roads with pump gas as possible, while still appearing stock to other drivers. If a turbo upgrade will increase the awesomeness factor of my car without damaging the engine I'd probably go for it.

Still wondering though - most of you guys are using JB4 maps. For my custom tune I use the Cobb AP to pull data logs at WOT in 3rd gear from 2800-6500 RPM, then email them to Jake at PTF; he then creates a new map with custom settings for boost, timing, AFM, etc and emails it back to me, and I then use the AP to load it onto my car via the OBD port. It's pretty cool. The maps are specifically for use with 91 octane. We did 4 or 5 rounds of that to dial in my tune with the stock engine and it made a huge difference. Gotta do it again now with the new FMIC once it stops raining here, and would do it again after turbo upgrade I'm sure. Wouldn't that take care of the timing issues and other problems some of you think I'd run into with the turbo upgrade?

Thanks,
Robert

[snaimpally]

Originally Posted by DrRobert

Hey guys,

I just finished reading all 81 pages of this thread. I might have missed a thing or two, but it seems like most of the people posting here who have the Pure Stage 1 turbo are using JB4s and are running either eth or meth, and either race or track their cars. This is awesome to see how much power you guys are getting from your N55 cars, but my driving style is different from yours and I'm trying to figure out if this turbo upgrade is for me.

My car is a 2011 335i w/ N55. It is my spirited daily driver and I am more interested in improving submaximal (to borrow a medical term) engine performance rather than pushing it to its limit. I should say that my DD is an hour each way and includes some really fun country/mountain twisty backroads - the most fun I have these days is driving my car to and from work and I want to make it as awesome as possible for driving on public roads. I just had a new FMIC and CP installed but don't plan on DP or exhaust upgrades. We only get 91 octane gas here in CA and I don't have access to E85 near my home nor any plans to add a meth kit. I saw the PT dyno on 91 gas w/ FBO but no real world users on lousy gas. So my questions are:

1. Anyone have a Pure Turbo and running plain 91 octane gas?
2. Anyone running one with a custom PTF/Cobb tune?
3. What sort of gains can I expect with Stage 1 turbo on 91 gas with FMIC and a custom tune?
3. If I get one do I have to install FF wires or LPFP if I'm not running E85 or meth?

Thanks guys, appreciate it!

Robert

Robert, I have Pure Turbos S1 and do not have FBO. In terms of engine mods, I currently only have JB4 and the Pure turbo upgrade, although I plan to have an FMIC installed shortly. No DP, no intake, etc., yet. However, I still noticed a big difference with the turbo using JB4 map 5 (self-tuning). The performance from 5k to redline is noticeably improved. I use 93 octane gas from the gas station. No meth and no E85.

With DP and FMIC I think you would benefit. You don't mention whether you have JB4 but I suggest getting a JB4. You could go the Cobb PTF route but JB4 map 5 is a self adjusting "auto-tune" that adjusts to your engine, your engine mods, octane rating of the gas you use, etc. The JB4 will adjust to the addition of the PT S1.

[DrRobert]

Originally Posted by snaimpally

Robert, I have Pure Turbos S1 and do not have FBO. In terms of engine mods, I currently only have JB4 and the Pure turbo upgrade, although I plan to have an FMIC installed shortly. No DP, no intake, etc., yet. However, I still noticed a big difference with the turbo using JB4 map 5 (self-tuning). The performance from 5k to redline is noticeably improved. I use 93 octane gas from the gas station. No meth and no E85.

With DP and FMIC I think you would benefit. You don't mention whether you have JB4 but I suggest getting a JB4. You could go the Cobb PTF route but JB4 map 5 is a self adjusting "auto-tune" that adjusts to your engine, your engine mods, octane rating of the gas you use, etc. The JB4 will adjust to the addition of the PT S1.

Thanks for that, snaimpally. That is encouraging. I see you have the same car as me, too. To clarify, I have a new FMIC and charge pipe, don't plan on upgrading down pipe or exhaust as I don't want the exhaust noise to increase. Regarding the JB4, what is the point of getting one if I already have a custom Cobb AP-based tune? I thought it was one or the other. Are you suggesting I ditch my custom tune or use the JB4 on top of it?

[Pure Turbos]

Originally Posted by DrRobert

Pardon my ignorance, but I don't know how to read all the details of those graphs and charts that have been posted (I'm smart enough to see if one line is higher than another but can't really tell a good log from a bad one). I just want my car to be as fun to drive on public roads with pump gas as possible, while still appearing stock to other drivers. If a turbo upgrade will increase the awesomeness factor of my car without damaging the engine I'd probably go for it.

Still wondering though - most of you guys are using JB4 maps. For my custom tune I use the Cobb AP to pull data logs at WOT in 3rd gear from 2800-6500 RPM, then email them to Jake at PTF; he then creates a new map with custom settings for boost, timing, AFM, etc and emails it back to me, and I then use the AP to load it onto my car via the OBD port. It's pretty cool. The maps are specifically for use with 91 octane. We did 4 or 5 rounds of that to dial in my tune with the stock engine and it made a huge difference. Gotta do it again now with the new FMIC once it stops raining here, and would do it again after turbo upgrade I'm sure. Wouldn't that take care of the timing issues and other problems some of you think I'd run into with the turbo upgrade?

Thanks,
Robert

That's the best way you can tune these cars. As long as Jake at PTF takes advantage of the increased boost at higher rpm the PURE Stage 1 will provide, you will enjoy nice gains compared to the stock turbo. Your approach is spot on Sir.

[DrRobert]

Thank you. My indy shop (Sonic MS in San Jose, CA) said that if I upgrade the turbo I'd need to add a second fuel pump. But he was also talking about using E85 with the new turbo too. Do I need to add a second fuel pump (or anything else, for that matter) if I'm only going to be using pump gas?

[tke344]

Originally Posted by DrRobert

Thank you. My indy shop (Sonic MS in San Jose, CA) said that if I upgrade the turbo I'd need to add a second fuel pump. But he was also talking about using E85 with the new turbo too. Do I need to add a second fuel pump (or anything else, for that matter) if I'm only going to be using pump gas?

There should be no need for an inline or upgraded LPFP on straight gasoline, unless the stock pump is dying. Unfortunately the Cobb does not log LPFP pressure for the N55 so it's difficult to tell if you really need it. It also lacks logging the HPFP sadly. A bit disappointing considering a $5 dollar App on my phone along with a $10 elm OBDII bluetooth adapter can monitor the HPFP.

In my trial and error self tuning, I've found that leaning out the AFR can take strain off the fuel system. Obviously there's limits to this, but it can provide headroom

[PURE135i]

Ptf runs 18psi on 91 octane, the pure will give you big gains if you use the Cobb/ptf combo.

[iuhutch]

Originally Posted by Pure Turbos

That's the best way you can tune these cars. As long as Jake at PTF takes advantage of the increased boost at higher rpm the PURE Stage 1 will provide, you will enjoy nice gains compared to the stock turbo. Your approach is spot on Sir.

Any update on the n55 inlet pipes? My IMs been waiting