[Anthony235]

Originally Posted by Luminous

On stock fueling you'll be limited to 16-17psi to redline. If you want more boost you'll need meth or pi. I recommend pi since the meth is limited to around 23psi. With pi you can push over 27psi boost although you'll likely blow your turbo at that point.

Short answer is that you need port injection to truly max out this turbo.

Even on 100oct you're limited to 17psi?

[Luminous]

Originally Posted by Anthony235

Even on 100oct you're limited to 17psi?

Yes the hpfp is the limiting factor. You'll need additional fueling to raise boost.

[Anthony235]

Originally Posted by Darkiedm4

For more boost you need to run fuel system upgrade. Adding E means you have to inject even more fuel so that stresses the fuel system more. After around 17-18 psi the fuel system needs help with pure stage2.

Dark, even with 100oct and a small E mix you'll be limited to ~17psi?

[Luminous]

Originally Posted by Anthony235

Dark, even with 100oct and a small E mix you'll be limited to ~17psi?

Yes.

[Anthony235]

Originally Posted by Luminous

Pi is much "safer" than meth.

Agreed, I would take PI over meth any day.

[Anthony235]

Originally Posted by Luminous

Yes the hpfp is the limiting factor. You'll need additional fueling to raise boost.

Thanks for the reality check......dream crusher!

[Jadar]

Originally Posted by jmwilson125

Thanks everyone lots of good info! It sounds like though route to go would be p stage 2 then fueling later if I feel the need.

Time to do some more research on that while I save. Are there any good diy turbo installs on here? I didn't see any on the pure site.

I haven't seen one and when I was doing my stage 1 it was just too much work and little time to stop and take photos and there's so many screws everywhere making a DIY will really take time and patience. Stage 1 is a pita even tho it's less work then a ps2.

[Jadar]

Originally Posted by Anthony235

Thanks for the reality check......dream crusher!

That's pretty much all there is to it. One can do a ps2 around 16-17psi on 93 and net around 440-450whp and that's it. Going on words will take fueling upgrades and or meth/PI.

[quattr0]

Originally Posted by Luminous

Pi is much "safer" than meth.

pls note i stated safer option in the future, did not say meth is safer PI. PI could still destroy your pistons if you want to read the post Mauricio MMP reported.

There will be safer options than PI if one really cares and could wait.

[Luminous]

Originally Posted by quattr0

pls note i stated safer option in the future, did not say meth is safer PI. PI could still destroy your pistons if you want to read the post Mauricio MMP reported.

There will be safer options than PI if one really cares and could wait.

What would be a safer option?

[Luminous]

Originally Posted by Dejan_

I haven't seen one and when I was doing my stage 1 it was just too much work and little time to stop and take photos and there's so many screws everywhere making a DIY will really take time and patience. Stage 1 is a pita even tho it's less work then a ps2.

Stage 2 install will be around 10-12 hours. I didn't have the balls to DIY it.

[Anthony235]

Originally Posted by quattr0

pls note i stated safer option in the future, did not say meth is safer PI. PI could still destroy your pistons if you want to read the post Mauricio MMP reported.

There will be safer options than PI if one really cares and could wait.

Link to post?

[PeterPure]

Originally Posted by Anthony235

Dark, even with 100oct and a small E mix you'll be limited to ~17psi?

100 octane has same energy content as 93. So you still have to inject the same amount. EWG cars run a tad leaner than PWG cars but I would say around 17-18 psi is the limit. You may get away with more in lower gears but the higher gears will put more strain on the fuel system as well.

[Drpoomanchu]

Originally Posted by Luminous

Stage 2 install will be around 10-12 hours. I didn't have the balls to DIY it.

Are there any install directions from Pure or someone that has DiY'd ...?

[quattr0]

Originally Posted by Anthony235

Link to post?

http://www.e90post.com/forums/showth...69&page=33

Starting page 33 half down

[quattr0]

Originally Posted by Luminous

What would be a safer option?

As stated, "future" ;-) Kidding aside, DI, 2nd HPFP, etc. No known solution yet. I understand Terry is looking to update his firmware to prevent hyperlean as Mauricio pointed out. Do not kniw how effective it would be as Mauricio stated it only takes a second to destroy the piston in hyperlean condition. Read the link replied above.

[Anthony235]

Originally Posted by quattr0

http://www.e90post.com/forums/showth...69&page=33

Starting page 33 half down

Interesting read. Thank you.

I hate adding complexity to any system, but PI is the only option right now. I would easily pay $1500 for a plug in play HPFP solution. I spent that much on my Z just to fix fuel starvation in right hand turns.

[PeterPure]

All supplemental fuel systems have their drawbacks. On N55 the DME does not cut the injector off easily when you get missfires. Usually they are small and can be felt. At this point you will release the pedal, cilinder wasnt cut off and nothing bad happened. If you keep pressing the pedal down the DME will eventually cut off the cilinder and engine will sound a lot different since it runs on fewer cilinders. At that point you would be stupid to keep the pedal to the floor. Even at the small misfires make a habbit of letting the pedal go. Nothing bad happens.

I dont know why BMW made this change on N55 vs N54 cutting off DI from 1 cilinder. On N55 it doesnt happen a lot and comes with warning first. Our cars missfire when HPFP goes under 10 in the logs. On N54 they get more heavy missfires but only when HPFP drops to under 5. I think hence the immediate cut-off. On N55 it's of less concern imo.

[rwalker]

Originally Posted by Anthony235

Interesting read. Thank you.

I hate adding complexity to any system, but PI is the only option right now. I would easily pay $1500 for a plug in play HPFP solution. I spent that much on my Z just to fix fuel starvation in right hand turns.

I share your dismay, but the F8x pumps are $1k/per before you buy the vacuum pump or sort the controller solution. So: you're looking at $2500+ for an HPFP solution. Unfortunately, the folks most likely to help us with such a thing are busy selling and developing PI...

IMHO: the ship has sailed. All roads to more power on an N55 go through PI.

[Anthony235]

Wish we could just throw a Walbro and bigger injectors in and call it a day!

[PeterPure]

Originally Posted by Anthony235

Wish we could just throw a Walbro and bigger injectors in and call it a day!

The injectors are not the problem nor is the lpfp. Is the hpfp!

[Anthony235]

Originally Posted by Darkiedm4

The injectors are not the problem not is the lpfp. Is the hpfp!

I know. Just saying I wish it was that easy.