It's time for Air Intake change .. what would you recommend me?

[-Willis-86touge]

So what about the Perrin intake 3vs2.5, I know consenus is to save move drop in filter!! But I have been looking a lot and people tend to say there's a better low end response with the Perrin? Is this true cause a better power band down low will help this car even if the hp is about the same as the drop in! Anybody chime in on thought? Maybe a before and after dyno to see differences in powerband! Besides I like the way it sounds!!! Lol

[Tcoat]

Originally Posted by Scrappydoo

And a spelling tutor?

Not to be confused with a Tudor of course!

[tyler_win_photo]

I recommend a dry filter. Less chance of it messing with your maf.

[Kestrel]

Legsport snorkle and Grimmspeed intake make me very happy in the pants

Sent from my SAMSUNG-SM-G900A using Tapatalk

[max20s14]

Originally Posted by justinco

I had the Perrin intake and inlet tube on my FRS. Sounds nice and cleans up the engine bay. But, you have to remove the bumper to install it and doubtful it actually makes any extra power.

I had the Grimmspeed intake on my 2017 BRZ. Again, sounds nice, doesn't change engine bay much except removes sound tube. Don't have to remove the bumper but again power gains are not noticeable.

Current state: I just removed the Grimmspeed intake and put the stock airbox back in, with a Perrin inlet tube and drop-in filter. Works great, inexpensive, and so far this is my favorite combo (stock box, drop-in filter, Perrin inlet tube).

What do you like better about your new combo over the grimspeed?


is it just being able to use the panel filters?


just curious because I currently am using the GS intake.


Thanks

[justinco]

Originally Posted by max20s14

What do you like better about your new combo over the grimspeed?


is it just being able to use the panel filters?


just curious because I currently am using the GS intake.


Thanks

It is simple and efficient, doesn't move the maf, and least prone to heat soak. I didn't really like the big metal box that is the Grimmspeed in the engine bay.

And my tuner said he recommended the stock setup, especially on the newer cars which supposedly have much different maf scaling.

[GrimmSpeed]

Originally Posted by justinco

It is simple and efficient, doesn't move the maf, and least prone to heat soak. I didn't really like the big metal box that is the Grimmspeed in the engine bay.

And my tuner said he recommended the stock setup, especially on the newer cars which supposedly have much different and scaling.

I'd argue that our intake is also simple, and more efficient (in that the tube routing is shorter, smoother, and has a greater center line radius for the bend angle). I haven't measured the restriction across the filter on the new intake, but I would sincerely doubt that it is less restrictive than the filter we use (it would be pretty difficult for it to be, impossible really since it is not oiled).

Also, there is nothing wrong with moving the MAF if the design is able to maintain the stock MAF curve. No real disadvantage there.

The heat soak issue is also something people bring up ALL of the time, and is short-sighted at best. People see a metal box and say "oh no, that's going to heat up, it's metal!" Sure, lets say that it does heat up from the heat from the engine bay. While the car is not moving the engine bay can heat up, and the heat trapped in the engine bay can cause the air box to heat up. But when the car starts moving there is literally thousands of CFM of ambient air that goes over, around, on the air box. You tend to be using more horsepower while you're moving too than when you're idling.

But lets pretend that that didn't exist either, lets pretend that there was zero airflow around the airbox, and it was just sitting there hot (which is exactly how we performed our dyno testing for a worst case scenario btw). The volume of air coming in through the snorkel into the engine is a few hundred CFM. The volume of the air compared to the inner surface area of the airbox is so much larger, and the air is in contact with the surface of the airbox so quickly (and almost never at all) that the increase in temperature to the air would be almost nothing at all.

This isn't the first time I've made these points, and it certainly won't be the last. I've made intakes for many different cars, and I've heard every argument in the world. The best thing I can do is explain my experience and knowledge about them, and people can choose to open their minds and look into it further. It's unfortunate that facts almost always lose to opinions about intakes on this forum especially.

The scaling difference is interesting, and the first I've heard of it. It's difficult to believe that a car with the same size MAF diameter, and the same MAF sensor, that was designed by an OEM to be compatible with a different airbox (the one still equipped on automatic cars), and adheres to the same standards as the OEM (to maintain the same resolution) would have a dramatically different scaling. This is something that could easily be answered if someone has our intake equipped on a 2017 model and has access to datalogging to check the STFT and LTFT. That would give us an absolute answer.

But I respect your opinion, you certainly don't have to think our intake is simple or like it or anything, and you certainly shouldn't run it if your tuner told you not to (even if I haven't seen any evidence to agree with the scaling issue). I just wanted to add some facts in to the opinions, and as always I'm open to answer any questions.

Chase
Engineering

[guybo]

I have an Injen intake and I watch IAT. The Injen intake is metal and the design is worse for hot air than the GS intake. The Injen, at speed, is really only about 10-15°F hotter than the OEM airbox. At idle and slow speeds I don't really care. I'm not guessing, I have actually seen it, observed it and used it as 1 variable about whether I'd keep the Injen or go back to silicone tube and OEM airbox.

Metal, plastic- doesn't matter. Feel the plastic airbox when the engine is good and hot, the airbox is hot too. Metal gets no hotter.

[justinco]

Originally Posted by GrimmSpeed

...

But I respect your opinion, you certainly don't have to think our intake is simple or like it or anything, and you certainly shouldn't run it if your tuner told you not to (even if I haven't seen any evidence to agree with the scaling issue). I just wanted to add some facts in to the opinions, and as always I'm open to answer any questions.

Chase
Engineering

Yes, it should be noted what I say is just my opinion based on my experiences. I don't have any hard data to prove either way. And probably in the big picture, there is little to no performance difference between the various options. I just go with what I am comfortable with and given recommendations on.

My tuner actually asked if GS made a specific intake for the 2017's, because the cars are so much different from a tuning standpoint. He was really cautious the first few tunes because of the maf scaling, after I installed the GS intake. It all worked out and was fine for 1k miles, I just wanted to make a change.

I do like the GS intake, just wanted to limit any potential for oddities when tuning the newer car.

EDIT: Actually, this has inspired me to find out which setup is better for me. I will be going to the dyno soon anyways, to get my post upgrade numbers. I am going to take my Grimmspeed intake and switch it over at the dyno, then compare it to my Perrin inlet tube + stock airbox & drop-in filter

[guybo]

Slapping on one intake then slapping on another at the dyno will have very little value. The car adjusts fuel trims and other stuff (one of the tuning guys help me out here) for the new intake and that takes some miles of driving and a few run cycles.

when I changed out my intake (I have several times) it always takes a weekish and around 100 miles for my LTFT to settle in and to really feel the difference of the intake.

[justinco]

Originally Posted by guybo

Slapping on one intake then slapping on another at the dyno will have very little value. The car adjusts fuel trims and other stuff (one of the tuning guys help me out here) for the new intake and that takes some miles of driving and a few run cycles.

when I changed out my intake (I have several times) it always takes a weekish and around 100 miles for my LTFT to settle in and to really feel the difference of the intake.

Yea good point. I'll dyno my current setup, then switch the intake and go back a week later.

[dostoyevsky]

Tbh the 2017 intake is good as is, keep it and save up for headers + tune = Best bang for buck in this car. Im in the damned breakin period and the torque dip is literally aids every time I have to shift under 4k.

[JW843]

I enjoy my GrimmSpeed intake. Minimal change in sound, especially if you have a moderately loud exhaust. Cleans up enjoy bay really nicely and retains stock design so doesn't typically require tune changes. Can't speak to the power changes, however.

So if $330 is worth it to you for engine bay clean-up, minor sound change, and you're not going Forced Induction for the near future go for it.