Strictly performing wise what is the Difference between Cold Air Intake and a Short Ram
High Rev?
Low Rev?
City Driving?
Highway Driving?
anything else performing wise?

 

Never had a CAI, but my Weapon R short ram caused a small gain in high end power, and loss in low end power. Highway driving is the same, just a tad louder. City driving is different, but really nothing to be worried about. You may have to downshift for some hills you previously didn't have to, as i've found, but the hill that caused this for me is quite steep.

 

Merge this with this.

 

Here you go:
https://www.scionlife.com/forums/viewtopic.php?t=92108
and
https://www.scionlife.com/forums/vie...asc&&start=154
The second one compares Injen CAI to two SRI; Weapon-R and Umitza.

Also, next time search, this info is readily available.

 

short ram is a bit louder and gives better low end power. cold air gets a bit lower mpg (scientifically speaking, I never had one so have no actual results), a bit quieter inside the car, and better high end power. better throttle response on the sri.

 

We've been through this before, CAI gives you more low end power then SRI. SRIs are notorious for low end torque loss. Do some research, look at some charts, read the links above. Every thread I see you in, you come off as if you know what you are talking about but all you do is misinform people. Look at your oil posts as well, do you know what the w in 5w-30 or any grade oil stands for???

 

other way around bud. love you too though!

 

BURN

 

Where do you get your facts from? Your "its a longer tube so it takes longer for the air to get to the throttle body" theory? Let me throw a number at you, an engine creates a vacuum of 20 inches of mercury at idle. A extra foot of piping for the cold section is insignificant.

Point 2, it would be theoretically beneficial to create an intake of over 10 feet long on some vehicles. Engine volumetric efficiency and power can be increased considerably by taking advantage of the natural dynamic effects which occur during the intake filling cycle. The kinetic energy of the resonant pulses can be harnessed to fill the engine cylinder at volumetric efficiencies up to 130%. When the intake valve closes, a pressure pulse "bounces" back of the intake tract and then in again towards the valve, and if timed properly, extra air can be "shoved" in. To use this pulse, the intake port must be the correct length but only occurs during a narrow RPM band.

Point 3, both previous points are used to discredit your "common sense" solution of the runner lengths having an effect on low end torque. In reality, the reason an SRI yields less power is due to the law of thermodynamics (The relationships between heat and other properties (such as temperature, pressure, density, etc.). In other words, since you are sucking in hot air from the engine bay, it is less dense and less compressible. Cooler air, away from the engine is denser. The more air, the more power you make, its simple.

Look at the post above yours, all the charts you need. Next time try a little harder than "its the other way around".

 

Burn!! Spect2k3 you better pull something out of your a$$ LOL Manece just schooled you

"its a longer tube so it takes longer for the air to get to the throttle body" WOW
the tube is filled with air it doesn't begin at the filter so once it start sucking in air it take just as long than the SRI

 

wow. I have to say. I completely lost interest in what he had to say that I couldn't even make it past the first two words of his lecture. We've done it before and I have proven you wrong before on many different topics. Regardless, you are too thickheaded to listen to anybody but yourself. Sometimes you make valid points, but it seems that you are so anxious to start a fight that you are usually pulling BS out of your butt. I can go through posts in the past where you have started fights with the entire community and STILL you insisted that you are right. I remember one thread where we were arguing about something with oil and everyone agreed except you who has the be right about something you were clearly not knowledgeable about. Menace, bro, amigo, dude, get a life. This is stupid, you just go around these threads looking for fights. I just clicked on your profile and looked at your past 50 posts and you have about 5-6 fights going on throughout the forum AS WE SPEAK! Clearly people don't like you. I haven't seen a single person around here YET who likes you! You don't like me, I don't like you - act your age and leave it alone. People don't get anything out of what you have to say b/c you aren't helpful, you are just argumentative and a know-it-all, when in reality, your "facts" are somewhat slanted. Do yourself a favor and find another hobby....cool?

 

We've butted heads before... but as somebody who has a SRI on his car, Menace is right on this one. My SRI helps in top end, not low end. It hurts low end.

 

Thanks for staying in topic Zebman

One thing I don't get are you comparing SRI to CAI or Stock? How does if it hurts it the low when Stock at 3.0 RPM x 1000 the Torque is at 140 (ft-Lbs) while on the SRI at 3.0 RMS x 1000 the Torque is at 150 (Ft-Lbs) I am looking at the Dynos from the first link

 

Spect, please show me when/where I was wrong and especially where you proved me wrong on many different topics. You are a joke. You make flawed statements based on assumption and your understanding, which is inaccurate and not helpful to someone who is out to find accurate information. Unless you know what you are talking about and can back it up, it's better not to talk as if you do, it only makes you look like a fool at the end. Also, I don't go looking for fights as you call them, but when I see someone spread inaccuracies I will correct them and show them where I am getting my facts from. It's not a popularity contest, its a forum.

Back to topic.
Which graphs are you looking at eric?
The first link I provided is a test between; Stock, K&N Filter, K&N CAI, Injen CAI, and Fujita F5. Injen CAI is the winner in those comparisons.
The second link is the Injen CAI compared to two SRIs (Weapon-R and Umitza) on the same car and dyno. Again, the Injen fares better then both SRIs at low RPMs and High RPMs

 

Yea I noticed that the cold air injen out performes them all, but both you and Zebman said the SRIs hurt the low end is that comparing it to a stock or to the CA Injen.

Look at the first link, (Stock, K&N, K&N CAI, Injen CAI, Injen SRI, and F5)

Compare the stock with the Injen SRI, there is a dip between 2.5 and 3.5 RPMs in the stock it dips the Torque to 140 (ft-Lbs) and on the Injen SRI there is a dip too but it doent look like it goes to 140 more like 145 maybe 143, Do you see what I am looking at.

My question is what do you guys mean it hurts the low end?

I am not arguing that it doesn't I just don't understand and I am looking to be enlighten on how SRI hurts the low end. I NEED TO LEARN

 

Alright, since I'm no expert on intakes, I can't really comment on whether you should go SRI or CAI for performance reasons.

But I can comment on why I have my Injen intake in SRI mode right now, and that's because of hydrolock. With regards to hydrolock, you should have your system SRI whenever you're in a notoriously wet part of the year for where you live, and CAI for when you're not.

Now, if your tC isn't your daily driver, you don't need to worry about this, but if you drive with a CAI and you happen to hit a huge pool of water on the road, you run the risk of water actually finding its way through your intake and into your engine, and as you well know, water can't detonate, so it destroys your compression stroke... and this is called hydrolocking. It's very expensive, and way more important than the performance issue; your engine can't perform at all if it's hydrolocked.

 

I'm talking about 2.5k and below. If I put the pedal to the floor while rolling in gear, it's slower to get going, but once it's going it picks up quickly. Almost like turbo lag, but not nearly as gratifying.

 

I get you homie, I hardly ever drive below 2.5 or over 4.5 so either intake is good for me, but one of the things I do like is the noise so I think ill opt for the SRI to make it louder ill sacrifice 2-3 meaningless horses for a cool "sssshhhh" (I don't know how to type that sound) every time I shift.

Is my logic right?

 

To get the loud whistle, you have to be haulin' *****, hitting 5-6k rpms. At lower RPMs it's a growl when you press the gas. Both of the sounds sound great. And I think the same as you. I don't mind the gains or losses, I wanted that sound and I got it.

 

The performance wasn't much part of the equation on my decision it was more a curiosity question to what I was getting, thanks for everyones input and entertaining argument from menace and Spect2k3 :p i feel enlighten now lol