[Randomizer2]

Planning to get a 135i soon and am in the process of researching mods. I want to get the VSRF OEM location inlets along with FBO but I read somewhere the silicone ones are bad. Would I get any gains if I am only using pump 94? I am mostly looking for top end gains here as that's where the stock turbos start to fall off.

[ragingpanda]

It won't hurt but they are a real pain in the ass to install. I had a bad experience with vrsf inlets, get either bms, rb or precision raceworks inlets.

You are still going to lose power at high rpms on stock turbos even with the inlets though.

[Randomizer2]

Originally Posted by ragingpanda

It won't hurt but they are a real pain in the ass to install. I had a bad experience with vrsf inlets, get either bms, rb or precision raceworks inlets.

You are still going to lose power at high rpms on stock turbos even with the inlets though.

Will the inlets at least improve top end? Also if that's the case what rpm should I shift at?

[langsbr]

Think of inlets as a reliability mod. They reduce restriction in the intake path which makes it so the turbos don't work as hard. I don't think it will change your top end power much, besides allowing for running a tad more boost if on stock turbos.

I wouldn't worry much about the brand either - they all suck to install. Fuck that rear inlet connection, it's a bitch.

[ragingpanda]

It will improve but you are still going to have to shift at around 6k rpms. You need upgraded twins or a single turbo for top end power.

[Randomizer2]

Originally Posted by ragingpanda

It will improve but you are still going to have to shift at around 6k rpms. You need upgraded twins or a single turbo for top end power.

Ah i see, so redline shifts aren't good with this car. So, would adding inlets hamper my top end? Or will it just increase my hp and torque everywhere? How will it affect the powerband?

[_N54]

Inlets will make a difference regardless what fuel you're running. Your turbo will be much happier not working as hard and you will gain torque and some horsepower. Silicone inlets are bad? That's pretty much the only thing on the market available for stock location. I have the 2" VRSF myself and I also have the VRSF outlets, but haven't installed it yet.

[Randomizer2]

Originally Posted by ///S58

Inlets will make a difference regardless what fuel you're running. Your turbo will be much happier not working as hard and you will gain torque and some horsepower. Silicone inlets are bad? That's pretty much the only thing on the market available for stock location. I have the 2" VRSF myself and I also have the VRSF outlets, but haven't installed it yet.

Do you have any before and after dyno sheets? Do you lose any hp at anywhere on the curve? I do not want to lose my low end and mid range and mostly want to increase top end but if I can get gains across the whole chart that would be nice. Could you elaborate where the power is gained if you know?

[_N54]

Originally Posted by Randomizer2

Do you have any before and after dyno sheets? Do you lose any hp at anywhere on the curve? I do not want to lose my low end and mid range and mostly want to increase top end but if I can get gains across the whole chart that would be nice. Could you elaborate where the power is gained if you know?

You won't lose low end with the stock twins lol. I do not have before and after dyno, but I'm boosting 22-23 psi peak and holding 20 psi to redline. I only dyno my cars when its finalized and I should be hitting the rollers soon.

Here's something I found on YouTube:

[Smgs1992]

I have 2in inlets from mmp and theyre great especially at reducing WGDC and even with OTS maps i’m running 2psi more than the equivalent fbo car would without. However to take full advantage of inlets you need a custom tune

[mike@x-ph.com]

Inlets are beneficial either way

[Randomizer2]

Originally Posted by ///S58

You won't lose low end with the stock twins lol. I do not have before and after dyno, but I'm boosting 22-23 psi peak and holding 20 psi to redline. I only dyno my cars when its finalized and I should be hitting the rollers soon.

Here's something I found on YouTube:

I see, would you say top end pulls a little better? You say you do not lose any of the low end, that's good. What about mid range? Any increases there?

[Saif2018]

Originally Posted by Randomizer2

I see, would you say top end pulls a little better? You say you do not lose any of the low end, that's good. What about mid range? Any increases there?

From what I've seen on Vehicular DIY video, he shows virtually zero loss of power from inlets, in fact shows power is sustained better and higher up the rev range, less tapering.

Low to mid is the biggest improvement though, watch the first video

Outlets don't make much of a difference, but inlets make a big difference.

[_N54]

Originally Posted by Saif2018

From what I've seen on Vehicular DIY video, he shows virtually zero loss of power from inlets, in fact shows power is sustained better and higher up the rev range, less tapering.

Low to mid is the biggest improvement though, watch the first video

Outlets don't make much of a difference, but inlets make a big difference.

Yup and in that video he was still on a OTS map which isn't even taking full advantage of inlets and outlets. I think with the logs I posted last week I'm taking advantage of mine

[Saif2018]

Originally Posted by ///S58

Yup and in that video he was still on a OTS map which isn't even taking full advantage of inlets and outlets. I think with the logs I posted last week I'm taking advantage of mine

[Rule1977]

Inlets are one of the most beneficial mods IMO.. that and Downpipes. I noticed a big difference.

[Torgus]

Yes. They are relatively inexpensive but a pain to install. You will want a custom tune to take real advantage of them. If you want more gains run meth and add outlets, that is going to max out your stock turbos on pump gas non 85. I would do all 3 and then start custom remote tuning.

I have held or seen most of the inlets on the market. The RB inlets are the highest quality along with PR but you pay for them. I always recommend the PR passenger side inlets as it cleans up the engine bay and you need to move your coolant tank anyways when your upgrade to a single turbo

[Rube]

Originally Posted by Rule1977

Inlets are one of the most beneficial mods IMO.. that and Downpipes. I noticed a big difference.

Agreed, i noticed increased power throughout the rpm range. I installed the RB inlets, wasn't that bad to install them. Need to craft up a small wrench and torx bit to get to the screws holding the rear inlet, and even that wasnt difficult imo.