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      04-07-2020, 06:56 AM   #1
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Feels Slower After Intake Install

Hey everyone, I posted this in a preexisting Intake thread also, but wanted to run it up the ladder a little bit.

*Disclaimer: I wasn't expecting the car to feel faster with an intake, I just wanted turbo noise .

Intake system came today. Install was pretty simple, except when you drop a socket head down to the floor pan, finally get it out, and 10 minutes later drop a bolt down there, and have to fish it out too.

Took it on a spin around the block real quick and the turbos sound great, can really hear them spool. As an added bonus it even adds a little BOV woosh also.

So here's the issue. I don't feel like it's boosting as strong as it was. Maybe I'm just getting used to it or maybe...maybe it's something I did. I had a difficult time tightening down the O clamps around the silicon hose on the turbo inlet. I've already checked to make sure the hose didn't come off, and she's still on there. My question is, if those O clamps aren't significantly tightened could I be losing boost around the silicone hose? Would it throw a code if there was a "boost leak" of sorts? Don't get me wrong it's still pulling pretty dang good, but it just feels a tad bit off. Any advice is appreciated. Thanks everyone!
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      04-07-2020, 07:12 AM   #2
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Anyone who has done this on any car will always remove it. There is usually a brief period of placebo. Followed by realisation. Then removal. I may have been guilty of this in a past life
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      04-07-2020, 07:26 AM   #3
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Quote:
Originally Posted by JMR1385 View Post
Hey everyone, I posted this in a preexisting Intake thread also, but wanted to run it up the ladder a little bit.

*Disclaimer: I wasn't expecting the car to feel faster with an intake, I just wanted turbo noise .

Intake system came today. Install was pretty simple, except when you drop a socket head down to the floor pan, finally get it out, and 10 minutes later drop a bolt down there, and have to fish it out too.

Took it on a spin around the block real quick and the turbos sound great, can really hear them spool. As an added bonus it even adds a little BOV woosh also.

So here's the issue. I don't feel like it's boosting as strong as it was. Maybe I'm just getting used to it or maybe...maybe it's something I did. I had a difficult time tightening down the O clamps around the silicon hose on the turbo inlet. I've already checked to make sure the hose didn't come off, and she's still on there. My question is, if those O clamps aren't significantly tightened could I be losing boost around the silicone hose? Would it throw a code if there was a "boost leak" of sorts? Don't get me wrong it's still pulling pretty dang good, but it just feels a tad bit off. Any advice is appreciated. Thanks everyone!
The intake is ahead of the turbos so its impossible to have a boost leak, since the boost is only built up after the turbine and into the chargepipe.

You could have a small air leak which means that unmetered air is entering the turbo post the air flow meter. The engine would then be running lean and lose power as it thinks it getting X air but really its X +% and the fuel is only for X air.

You could have fed up the air flow meter as some oiled filters are known to do, although this seems to be less common nowadays.

As Davil said hot air intakes are not worth the cash. The stock system flows well enough for 800WHP according to a reputable S55 tuner near me.

If you want more noise and have a stock US spec car, then remove the charcoal filters.

EDIT: you can check if you have an air leak by idling the car and spraying carb cleaner/WD40/break cleaner near the turbo connections. If the revs pick up then you have a leak.
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      04-07-2020, 07:30 AM   #4
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Quote:
Originally Posted by Megator View Post
Quote:
Originally Posted by JMR1385 View Post
Hey everyone, I posted this in a preexisting Intake thread also, but wanted to run it up the ladder a little bit.

*Disclaimer: I wasn't expecting the car to feel faster with an intake, I just wanted turbo noise .

Intake system came today. Install was pretty simple, except when you drop a socket head down to the floor pan, finally get it out, and 10 minutes later drop a bolt down there, and have to fish it out too.

Took it on a spin around the block real quick and the turbos sound great, can really hear them spool. As an added bonus it even adds a little BOV woosh also.

So here's the issue. I don't feel like it's boosting as strong as it was. Maybe I'm just getting used to it or maybe...maybe it's something I did. I had a difficult time tightening down the O clamps around the silicon hose on the turbo inlet. I've already checked to make sure the hose didn't come off, and she's still on there. My question is, if those O clamps aren't significantly tightened could I be losing boost around the silicone hose? Would it throw a code if there was a "boost leak" of sorts? Don't get me wrong it's still pulling pretty dang good, but it just feels a tad bit off. Any advice is appreciated. Thanks everyone!
The intake is ahead of the turbos so its impossible to have a boost leak, since the boost is only built up after the turbine and into the chargepipe.

You could have a small air leak which means that unmetered air is entering the turbo post the air flow meter. The engine would then be running lean and lose power as it thinks it getting X air but really its X +% and the fuel is only for X air.

You could have fed up the air flow meter as some oiled filters are known to do, although this seems to be less common nowadays.

As Davil said hot air intakes are not worth the cash. The stock system flows well enough for 800WHP according to a reputable S55 tuner near me.

If you want more noise and have a stock US spec car, then remove the charcoal filters.
Thank you.

I'll try to get those tightened down a bit more, just for peace of mind.
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      04-07-2020, 10:00 AM   #5
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What about disconnecting the battery for a few minutes, and letting the ECU reset? Yay, nay, maybe?
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      04-07-2020, 10:09 AM   #6
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Which intake did you install? I've got the Eventuri intake and car doesn't feel slower. Sure sounds like something is leaking.
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      04-07-2020, 10:26 AM   #7
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Quote:
Originally Posted by robertm View Post
Which intake did you install? I've got the Eventuri intake and car doesn't feel slower. Sure sounds like something is leaking.
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Originally Posted by robertm View Post
Which intake did you install? I've got the Eventuri intake and car doesn't feel slower. Sure sounds like something is leaking.

CTS Turbo. Much cheaper option, but I'm not knocking the quality. It's just not a full carbon system like yours.
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      04-07-2020, 12:50 PM   #8
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Now that we are all quarantined you have time to take it off and drive it around. If the car feels faster, albeit quieter, then you know it's the Intake.
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      04-07-2020, 01:11 PM   #9
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Quote:
Originally Posted by Bumpinjeep View Post
Now that we are all quarantined you have time to take it off and drive it around. If the car feels faster, albeit quieter, then you know it's the Intake.
Definitely my next option if tightening down those O clamps more doesn't work.
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      04-07-2020, 01:15 PM   #10
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Quote:
Originally Posted by JMR1385 View Post
Took it on a spin around the block real quick and the turbos sound great, can really hear them spool. As an added bonus it even adds a little BOV woosh also.
Full disclosure, there are no bypass or blow off valves on the S55. It's all dumped through the wastegate/exhaust

As other recommended maybe just to make sure everything is tight and seated correctly. Hopefully that'll solve it.
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      04-07-2020, 01:16 PM   #11
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Could also be adaptations not quiet settled in with the new intake. Give it a day or two of driving.
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      04-07-2020, 01:40 PM   #12
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Quote:
Originally Posted by pz619 View Post
Quote:
Originally Posted by JMR1385 View Post
Took it on a spin around the block real quick and the turbos sound great, can really hear them spool. As an added bonus it even adds a little BOV woosh also.
Full disclosure, there are no bypass or blow off valves on the S55. It's all dumped through the wastegate/exhaust

As other recommended maybe just to make sure everything is tight and seated correctly. Hopefully that'll solve it.
Didn't know that. But it still sounds like it.
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      04-07-2020, 03:09 PM   #13
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Quote:
Originally Posted by JMR1385 View Post
Didn't know that. But it still sounds like it.
My old Celica All trac didn't have a BOV either, but one time a hose clamp wasn't tightened down properly and it made HUGE BOV esque sounds when i tried to drive it. It would also dump way too much fuel into the engine and slow everything down when it hit boost.

However, that was a hose clamp that was right before the intercooler on the high pressure side, not on the pre-turbo, low pressure side.
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      04-07-2020, 03:37 PM   #14
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Quote:
Originally Posted by Moflow View Post
Quote:
Originally Posted by JMR1385 View Post
Didn't know that. But it still sounds like it.
My old Celica All trac didn't have a BOV either, but one time a hose clamp wasn't tightened down properly and it made HUGE BOV esque sounds when i tried to drive it. It would also dump way too much fuel into the engine and slow everything down when it hit boost.

However, that was a hose clamp that was right before the intercooler on the high pressure side, not on the pre-turbo, low pressure side.
Yea this noise is for sure coming from the intake...sounds awesome (to me). Same noise when I put an intake on my Focus ST I had back in 2014.
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      04-07-2020, 03:41 PM   #15
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What about disconnecting the battery for a few minutes, and letting the ECU reset? Yay, nay, maybe?
No - try throttle body adaption reset
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      04-07-2020, 03:55 PM   #16
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Quote:
Originally Posted by Bee Pee View Post
Quote:
Originally Posted by JMR1385 View Post
What about disconnecting the battery for a few minutes, and letting the ECU reset? Yay, nay, maybe?
No - try throttle body adaption reset
Do you happen to have the latest edition of "Throttle Body Adaption Reset for Dummies" that I could borrow?
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      04-07-2020, 04:09 PM   #17
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Quote:
Originally Posted by JMR1385 View Post
Quote:
Originally Posted by Bee Pee View Post
Quote:
Originally Posted by JMR1385 View Post
What about disconnecting the battery for a few minutes, and letting the ECU reset? Yay, nay, maybe?
No - try throttle body adaption reset
Do you happen to have the latest edition of "Throttle Body Adaption Reset for Dummies" that I could borrow?
Google it mate
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      04-07-2020, 04:10 PM   #18
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Quote:
Originally Posted by JMR1385 View Post
Do you happen to have the latest edition of "Throttle Body Adaption Reset for Dummies" that I could borrow?

https://f87.bimmerpost.com/forums/sh....php?t=1669584
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      04-07-2020, 06:22 PM   #19
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Quote:
Originally Posted by jkoral View Post
Quote:
Originally Posted by JMR1385 View Post
Do you happen to have the latest edition of "Throttle Body Adaption Reset for Dummies" that I could borrow?

https://f87.bimmerpost.com/forums/sh....php?t=1669584
Thank you.
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      04-15-2020, 01:05 AM   #20
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Update: I took off the turbo inlet pipe and discovered one of the T clamps around the silicone hose was busted. I replaced both T clamps and feel pretty confident with how tight I was able to get them. I also did that throttle response reset thing and took it for a spin the next day.

Here's the part where I'll just fall on my sword. It was pulling good but still felt a bit off from what I had initially felt w the car. Turns out I had programmed my M buttons incorrectly and what I thought was Sport + was just Sport. Once I put it in Sport + she was back on track.

Sorry for the stupidity, but I'm glad to know it was user error!
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      05-24-2022, 12:27 AM   #21
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Sorry to revive old thread but wondering if you kept the CTS intake and if so has there been any issues long term?
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