[Shatteredpixelz]

Hi all, my car will be getting its front subframe dropped soon for the oil pan gasket service, I currently have a 2015 435i N55 xDrive. (EWG) Being in CA, getting a HPFP would be a total bitch to install and uninstall every year, would a Pure 500 turbo be worth it? Obviously, I'd love a PS2, but I don't see myself getting a HPFP upgrade any time soon and given a HPFP is what is needed to max out the PS2, I don't necessarily see the point of getting a turbo that large. I've already got a downpipe, intercooler, intake, and charge pipe.

[kickthecan]

Why would the hpfp be a bitch due to CA?

You can modify the b58tu hpfp if you don't want one that looks out of place

[johnung]

Originally Posted by kickthecan

Why would the hpfp be a bitch due to CA?

You can modify the b58tu hpfp if you don't want one that looks out of place

Correct me if I’m wrong but I think the issue in CA is that they plug in to your OBD and see that a non-BMW HPFP has been installed. On the N55 the HPFP is located under the intake manifold. It would take someone very knowledgeable to try to see bits of it under there with a flashlight

[johnung]

Originally Posted by Shatteredpixelz

Hi all, my car will be getting its front subframe dropped soon for the oil pan gasket service, I currently have a 2015 435i N55 xDrive. (EWG) Being in CA, getting a HPFP would be a total bitch to install and uninstall every year, would a Pure 500 turbo be worth it? Obviously, I'd love a PS2, but I don't see myself getting a HPFP upgrade any time soon and given a HPFP is what is needed to max out the PS2, I don't necessarily see the point of getting a turbo that large. I've already got a downpipe, intercooler, intake, and charge pipe.

IMO a Pure500 would be worth it. Your N55 EWG turbo maxes out at roughly 450hp. Once enough dyno results are in the Pure500 will probably hit +40 to +70hp over that. Everything depends on fueling and tuning of course. Pure500 maintains low end torque so no extra turbo lag like most turbo upgrades.

Dropping an XDrive oilpan is expensive because the driveshaft goes through the middle of the oilpan. There are several installations that overlap tremendously with that labor. Here are the ones that I’d consider doing at the same time.

1) Upgrading rod bearings to VAC coated bearings. Big insurance policy against oil starvation damage later.

https://store.vacmotorsports.com/mob...s55-p4845.aspx

2) Upgrade the front sway bar to an H&R 28mm to reduce body roll. Car corners flatter. See photo. H&R part number for front sway bar for your car should be 70878-3.

Note: Replacing rear sway bar is easier. Your stock rear bar is probably 12mm. After getting used to new front bar, you may want to upgrade rear bar to 15mm BMW bar, 16mm Eibach or 17mm KC Design. The 20mm H&R bar is a bit too heavy and in aggressive driving can cause some rear wheel lift, making the rear tire patch smaller.

3) Replace engine mounts. Often they have compressed to half their original thickness.

4) Pure500 turbo upgrade

Hope this helps.

[Shatteredpixelz]

Originally Posted by kickthecan

Why would the hpfp be a bitch due to CA?

You can modify the b58tu hpfp if you don't want one that looks out of place

for smog purposes, I would have to uninstall the HPFP every two years in order to maintain my registration and pass CARB inspections. Unless the B58TU pump can be run on the stock tune (as tunes fail now) I don't want to be bothered with taking off my intake manifold every two years.

[Shatteredpixelz]

Originally Posted by johnung

IMO a Pure500 would be worth it. Your N55 EWG turbo maxes out at roughly 450hp. Once enough dyno results are in the Pure500 will probably hit +40 to +70hp over that. Everything depends on fueling and tuning of course. Pure500 maintains low end torque so no extra turbo lag like most turbo upgrades.

Dropping an XDrive oilpan is expensive because the driveshaft goes through the middle of the oilpan. There are several installations that overlap tremendously with that labor. Here are the ones that I’d consider doing at the same time.

1) Upgrading rod bearings to VAC coated bearings. Big insurance policy against oil starvation damage later.

https://store.vacmotorsports.com/mob...s55-p4845.aspx

2) Upgrade the front sway bar to an H&R 28mm to reduce body roll. Car corners flatter. See photo. H&R part number for front sway bar for your car should be 70878-3.

Note: Replacing rear sway bar is easier. Your stock rear bar is probably 12mm. After getting used to new front bar, you may want to upgrade rear bar to 15mm BMW bar, 16mm Eibach or 17mm KC Design. The 20mm H&R bar is a bit too heavy and in aggressive driving can cause some rear wheel lift, making the rear tire patch smaller.

3) Replace engine mounts. Often they have compressed to half their original thickness.

4) Pure500 turbo upgrade

Hope this helps.

Thank you for this wealth of information!!! This is incredible!! I think I'm going to hold off on rod bearings at least for the time being as I just got a blackstone labs report that came back with flying colors!

[thejeremyman9]

Originally Posted by Shatteredpixelz

for smog purposes, I would have to uninstall the HPFP every two years in order to maintain my registration and pass CARB inspections. Unless the B58TU pump can be run on the stock tune (as tunes fail now) I don't want to be bothered with taking off my intake manifold every two years.

Yes you can run the B58TU pump on stock tune. It's the only option really for us in CA in terms of HPFP upgrade. I've considered it, but never pulled the trigger because I am a little hesitant to make the modifications necessary to make it fit/work, even though minor. Going meth injection is another option, because you can flash back to stock with it installed, but could in theory fail visual.

[LA1Z24]

The HPFP is easy to change. The first time may take you 2 hours but once you do it 2 or 3 times it's easily done in 1 hour.

[Shatteredpixelz]

Originally Posted by LA1Z24

The HPFP is easy to change. The first time may take you 2 hours but once you do it 2 or 3 times it's easily done in 1 hour.

I have negative mechanical ability so i'd be paying someone to do it for me lol

[kickthecan]

Originally Posted by Shatteredpixelz

for smog purposes, I would have to uninstall the HPFP every two years in order to maintain my registration and pass CARB inspections. Unless the B58TU pump can be run on the stock tune (as tunes fail now) I don't want to be bothered with taking off my intake manifold every two years.

Yes the b58tu works on stock tune like another user said.

You say you have a downpipe. Is it a catted downpipe?

[lens]

Originally Posted by Shatteredpixelz

for smog purposes, I would have to uninstall the HPFP every two years in order to maintain my registration and pass CARB inspections. Unless the B58TU pump can be run on the stock tune (as tunes fail now) I don't want to be bothered with taking off my intake manifold every two years.

Man, your state sucks, I don't know why you guys don't move to a more car mod friendly state, like Texas or something.

[mike@x-ph.com]

Originally Posted by lens

Man, your state sucks, I don't know why you guys don't move to a more car mod friendly state, like Texas or something.

They are

The 2020 U.S. Census recorded just over 39.5 million Californians, but as of 2023, that number has fallen by 1.3% to just over 39 million. Meanwhile, Texas, the second-most populous state, has grown to more than 29 million people, closing the gap with California to below 10 million.

[AmuroRay]

Don’t come to Florida, too many people

[kickthecan]

Originally Posted by lens

Man, your state sucks, I don't know why you guys don't move to a more car mod friendly state, like Texas or something.

There are plenty worse than California....and it'd take a lot for me to move to Texas. I very much enjoy my power and not trying to be on my own power grid

[Jvac]

Yes, come to Texas and be like one of the other 10 million clowns ripping around my residential neighborhood all hours of the day with roaring catless exhaust because we don't care about emissions at all. And you too can enjoy mile after mile of achingly dull flat roads. It sucks here and you're hours from anywhere fun in a car. Or a beach, or a mountain or any other scenic view

[AmuroRay]

Originally Posted by Jvac

Yes, come to Texas and be like one of the other 10 million clowns ripping around my residential neighborhood all hours of the day with roaring catless exhaust because we don't care about emissions at all. And you too can enjoy mile after mile of achingly dull flat roads. It sucks here and you're hours from anywhere fun in a car. Or a beach, or a mountain or any other scenic view

Doesn’t sound that bad, minus the ripping through the neighborhood.

[n55david]

I loved texas.. Houston was terrible and so what San Antonio though.. Austin and dfw was solid

[lens]

Originally Posted by Jvac

Yes, come to Texas and be like one of the other 10 million clowns ripping around my residential neighborhood all hours of the day with roaring catless exhaust because we don't care about emissions at all. And you too can enjoy mile after mile of achingly dull flat roads. It sucks here and you're hours from anywhere fun in a car. Or a beach, or a mountain or any other scenic view

Move to California if you hate it so much lol

Let the guys that want to not care about emissions move to Texas, and the ones that want to be in a communist state, move to California

[kickthecan]

Originally Posted by lens

Move to California if you hate it so much lol

Let the guys that want to not care about emissions move to Texas, and the ones that want to be in a communist state, move to California

Imagine calling anything you don't like communist...lol, really enjoying the brainwashing

We get it, you don't like California. I very much enjoy the food and people there so...more for me

[AmuroRay]

Originally Posted by kickthecan

Imagine calling anything you don't like communist...lol, really enjoying the brainwashing

We get it, you don't like California. I very much enjoy the food and people there so...more for me

I’m not sure why it’s so personal to people that they have to defend it

[Jvac]

Or attack it. Who cares. I've spent enough time in both places to know the whole argument is silly. Both have their own problems and pluses and minuses. Both are opposite extreme ends of the political spectrum, neither of which is ideal.

[AmuroRay]

I think political ideology is completely arbitrary and the line drawn are purposely divisive, being used as a tool to keep the population focused on their peers instead of the bigger issues .

So that’s why I’m not defending anything - California does suck for Car enthusiasts, and a lot of the rules have nothing to do with emissions. It’s simply a way to generate revenue and influence people’s buying decisions.