[Pbforlife254]

Currently on oem turbos, downpipes and stage 2 MHD tune. FMIC on the way as well so will be stage 2+ shortly. I was thinking about inlets but I am not to sure if it is worth it. What type of gains can I except with inlets on stage 2 ots map. Will I need to get a custom map to see any real gains? Will I be able to gain around 30-40hp from inlets on a ots map? Not sure if I should go with inlets or just pass and get myself some wheels??

[B@man335]

Long story short, yes they're worth it. Can expect 30-40whp gains

[Pbforlife254]

I guess that is good to hear haha. From reading around I just read that I will see minimal gains with inlets. But if I am going to be able to get around 30-40hp I guess it is worth it.

[Pbforlife254]

I am talking about VRSF oem high flow inlets btw. Not looking to do an relocation. Can I still expect 30-40whp?

[V8bait]

Originally Posted by B@man335

Long story short, yes they're worth it. Can expect 30-40whp gains

Sounds like you're low balling the poor man, inlets make the turbos literally shit horsepowers. You can smell them in the thrust smoke.

[B@man335]

Originally Posted by V8bait

Sounds like you're low balling the poor man, inlets make the turbos literally shit horsepowers. You can smell them in the thrust smoke.

Haha I should have said atleast 30-40 hp

[SE7EN335]

Originally Posted by Pbforlife254

Currently on oem turbos, downpipes and stage 2 MHD tune. FMIC on the way as well so will be stage 2+ shortly. I was thinking about inlets but I am not to sure if it is worth it. What type of gains can I except with inlets on stage 2 ots map. Will I need to get a custom map to see any real gains? Will I be able to gain around 30-40hp from inlets on a ots map? Not sure if I should go with inlets or just pass and get myself some wheels??

LMAO you wont expect 30-40hp from stock turbos. NO WAY IN HELL. 30-40hp is for aftermarket turbos like RBs and Hexons. For stock turbos 10-20hp is all you will get with custom tuning

[Captain Canuck]

I think it depends. If you really want to push the envelope then sure, but my inlets didn't fit well; they're wedged between the engine block and the firewall and eventually they're going to wear through. I'm not sure what I'm going to do once that happens. After seeing the fitment I realized I would have been better off leaving well enough alone. This is what my tech had to say about them: "Those silicone pipes are $hit!".

[brewnami]

Originally Posted by SE7EN335

LMAO you wont expect 30-40hp from stock turbos. NO WAY IN HELL. 30-40hp is for aftermarket turbos like RBs and Hexons. For stock turbos 10-20hp is all you will get with custom tuning

Please do some research and look at the dyno slips folks have posted on this forum before making asinine claims like that. Way too many people like you who have never dyno'd their car chiming in with dyno claim numbers based on uneducated guesses. There are a few sheets posted here showing 40+ whp on stock turbos no "custom tuning." Unless I'm wrong, I'd be happy to see your dyno slips, as would everyone else here.

[MM Performance]

Originally Posted by SE7EN335

LMAO you wont expect 30-40hp from stock turbos. NO WAY IN HELL. 30-40hp is for aftermarket turbos like RBs and Hexons. For stock turbos 10-20hp is all you will get with custom tuning

Man your way off. Stock turbos it does 45whp more with tuning. Hybrid turbos it does over 100whp more with tuning. This has been heavy documented on many forums with clear before and after dynos where the only thing that changed was adding inlets and adjusting the tune and also the engineering explanation of why this is so has been posted. Carful in spreading that miss information and look for the dyno testing I'm referring to. This was all done in 2015 and some in 4Q16.

Look for the dynos and threads across this and other forums. Stock turbos without inlets max out at 450whp, with inlets 500 to even 514whp has been reported by several maxing out. Stage 2 turbos maxed out at 550whp prior to inlets, after inlets the same turbos made up to 680whp, with tuning and fuel.

[Pbforlife254]

So many mixed opinions haha I'm not sure what to to. I've looked up some dynos with stock turbos inlets and 93oct. I saw frankenturbo had no power increase but have also seen mmperformance dynos with power increases. I've also heard that I won't really see gains unless going e85 etc. I plain on staying with 93oct and not really looking to get a custom tune. Makes me wonder because I won't really be getting full potential out of them without either of those.

[SE7EN335]

Originally Posted by brewnami

Please do some research and look at the dyno slips folks have posted on this forum before making asinine claims like that. Way too many people like you who have never dyno'd their car chiming in with dyno claim numbers based on uneducated guesses. There are a few sheets posted here showing 40+ whp on stock turbos no "custom tuning." Unless I'm wrong, I'd be happy to see your dyno slips, as would everyone else here.

http://www.n54tech.com/forums/showthread.php?t=30628

Greg Noble is from the BMW Drivers Club in NSW Australia and it clearly says 30WHP gain on RBs with no tuning change, which is exactly what I said.

[SE7EN335]

Originally Posted by MM Performance

Man your way off. Stock turbos it does 45whp more with tuning. Hybrid turbos it does over 100whp more with tuning. This has been heavy documented on many forums with clear before and after dynos where the only thing that changed was adding inlets and adjusting the tune and also the engineering explanation of why this is so has been posted. Carful in spreading that miss information and look for the dyno testing I'm referring to. This was all done in 2015 and some in 4Q16.

Look for the dynos and threads across this and other forums. Stock turbos without inlets max out at 450whp, with inlets 500 to even 514whp has been reported by several maxing out. Stage 2 turbos maxed out at 550whp prior to inlets, after inlets the same turbos made up to 680whp, with tuning and fuel.

How can you possibly get 130whp gain from inlets with tuning on stage 2, when Greg Noble got a 40kw increase at wheels from custom tuning and increasing boost from 22psi to 24psi. And its a known fact that the American dynos all read much higher than Australian dynos. And please don't give me some bullshit saying the "stage 2s" flow much better than the RB's hence giving it the better power increase.

[Torgus]

Originally Posted by Pbforlife254

So many mixed opinions haha I'm not sure what to to. I've looked up some dynos with stock turbos inlets and 93oct. I saw frankenturbo had no power increase but have also seen mmperformance dynos with power increases. I've also heard that I won't really see gains unless going e85 etc. I plain on staying with 93oct and not really looking to get a custom tune. Makes me wonder because I won't really be getting full potential out of them without either of those.

You will still get gains. You can also run meth. If you get inlets you will want a custom tune. Custom tunes are not all that expensive anyways.

[V8bait]

Originally Posted by SE7EN335

How can you possibly get 130whp gain from inlets with tuning on stage 2, when Greg Noble got a 40kw increase at wheels from custom tuning and increasing boost from 22psi to 24psi. And its a known fact that the American dynos all read much higher than Australian dynos. And please don't give me some bullshit saying the "stage 2s" flow much better than the RB's hence giving it the better power increase.

American dynos showed 1.21 gigawatts with inlets when Emmit Brown hit the rollers, so you might be right. But they didn't have an rpm trace, just speed, and they let off at 88mph for some reason.

[Dmacc]

There is power to be gained and the car will feel a lot more responsive down low. I was in the same position as you, OP and ended up going with them. Your wgdc will drop a great amount, your turbos will love you.

[Red_Bean_Bun]

Originally Posted by SE7EN335

LMAO you wont expect 30-40hp from stock turbos. NO WAY IN HELL. 30-40hp is for aftermarket turbos like RBs and Hexons. For stock turbos 10-20hp is all you will get with custom tuning

Someone down under did a dyno and got 30 whp without any custom tune IIRC ...

[SE7EN335]

Originally Posted by Red_Bean_Bun

Someone down under did a dyno and got 30 whp without any custom tune IIRC ...

Yes my mate Greg Noble did it on RBs not stock turbos. Which is exactly what i said. 30-40hp for aftermarket turbos. I even provided the link

[335is-dct]

I don't know about this dramatic hp gain others talk about, but I do know that they dramatically reduced my wgdc. As the engine gets into the higher rpm's, boost is higher than before, and wgdc is much lower. This is very apparent from my logs, so in that regards I'm happy.

[screaminfast]

Originally Posted by V8bait

American dynos showed 1.21 gigawatts with inlets when Emmit Brown hit the rollers, so you might be right. But they didn't have an rpm trace, just speed, and they let off at 88mph for some reason.

[Jeff@TopGearSolutions]

Inlet manufacturers and customers boasting them should really post up dynos to prove their worth. I believe they work but that's not the point here.

A controlled test would be the following variables:

-Current Tune

-Current Tune modified with increased boost (possibly timing too), possibly showing losses in power or elevated WGDC

-Current Tune with inlets

-Current Tune with inlet with increased boost (possibly timing too), showing potential power gain and reduced WGDC

When we say maxxed out turbo's are we talking about glory run numbers that aren't realistic on the street.

I can turn up my car on 93 octane, no meth and see 20-30WHP gains but it's not realistic to run it on the street daily cause it's riding the knock sensor like a SOB.

[MM Performance]

Originally Posted by SE7EN335

How can you possibly get 130whp gain from inlets with tuning on stage 2, when Greg Noble got a 40kw increase at wheels from custom tuning and increasing boost from 22psi to 24psi. And its a known fact that the American dynos all read much higher than Australian dynos. And please don't give me some bullshit saying the "stage 2s" flow much better than the RB's hence giving it the better power increase.

I'm telling you it's been proven on the dyno and I posted the engineering reasoning behind it on another forum. If you really need me to I will dig it up and post it here (very long post). Brian at TFT did it a year ago on a dynojet. On stock inlets it was maxed out at 550whp at around 5300rpm then power would fall off. Main reason is pulling a large vacuum to the turbo compressor inlet which is THE WORST for a turbo which is just a pressure ratio pump so any vacuum you pull gets MULTIPLIED by the pressure ratio in boost power potential loss. Boils down to two basic reasons: Able to hold more boost to redline 10-12psi and hold that peak torque for 1000-1500 deeper into the rpm making more hp with the same max torque.

Attached is the dyno plot he made about a year ago. Keep in mind this was with regular old RB cast wheel turbos. He ran them up to 30psi I beowiev to make 685whp. Before they were MAXED out at 550whp and would push more than 18psi at redline max WGDC because of what I described above. Brian May is the godfather of inlets on the N54 and he started the revolution he proved what they could do, many called him a liar, and then they all copied him.

So yes increase of 100+whp by changing inlets and fuel/tuning is real and has been done not only by Brian but Many others with hybrid turbos. Look up any max dyno tune on hybrid turbos from 2014 back and you will see they all max out WGDC at around 550whp and won't make more than about 18psi boost in the top end.