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Discussion Starter · #1 ·
So does anyone have any opinions pro or con on either or one over the other?
 

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I don't have either but when I was lookin into a cai or short ram intake I was going to go with the fujita cuz It looked cleaner and u could do short and long ram with it and I liked the black but cuz I live in Cali I went with the Trd cuz it is carb legil so ya I would go with the fujita
 

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K&N Typhoon what what!
 

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K&N Short Ram :D
 

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Discussion Starter · #6 ·
The weapon-R and Fujita are available used right now. Since I'm cheap those are my options. (If buying new, I'd probably opt for the AFE.)

I just read a thread though in the scikotics forum that says intakes on our Scions are strictly cosmetic. They provide gains in hp for a while, but then out engine management system learns that something is different and adjusts itself accordingly so the engine runs like it did with the stock intake.

If true, I don't know that I want to spend the money on one. :confused:
 

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I've never heard of that. My K&N short ram does increase horsepower that is slightly noticeable. When at a stop light and the light turns green, the gas pedal is a lot more sensitive than it was on stock. If you really want to save money, get a cheap-o cold air intake off of eBay and then buy K&N cone filter. You will be fine.
 

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I've never heard of that. My K&N short ram does increase horsepower that is slightly noticeable. When at a stop light and the light turns green, the gas pedal is a lot more sensitive than it was on stock. If you really want to save money, get a cheap-o cold air intake off of eBay and then buy K&N cone filter. You will be fine.
A SRI or CAI is ***STRICTLY COSMETIC***. You will get no performance gains, and more than likely you will lose low end HP and torque. The pedal only will feel more responsive because you are able to get air to reach the throttle body FASTER. For increased performance, you would need to tune it. If you gain ANYTHING, it would be top end (read: 80 mph+) when the function of the CAI and SRI outpreform the DESIGN capabilities of the stock airbox.

Hopes this clears things up.. Oh, and I have a custom SRI. SRI for the turbo (which I have a Cobb pipe to insure accurate MAF readings.
 

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Discussion Starter · #9 ·
A SRI or CAI is ***STRICTLY COSMETIC***. You will get no performance gains, and more than likely you will lose low end HP and torque. The pedal only will feel more responsive because you are able to get air to reach the throttle body FASTER. For increased performance, you would need to tune it. If you gain ANYTHING, it would be top end (read: 80 mph+) when the function of the CAI and SRI outpreform the DESIGN capabilities of the stock airbox.

Hopes this clears things up.. Oh, and I have a custom SRI. SRI for the turbo (which I have a Cobb pipe to insure accurate MAF readings.
Thanks for the info. I didn't expect it to do a lot. Several people have reported a few mpg increase after installation. If it just reverts back to stock performance and efficiency I probably won't do it just for cosmetics (and the sound of course).
 

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Well that just contradicts everything I've read about the computer being able to adjust for the CAI and "tune" itself fairly well over time. Those people need to post in here.
 

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The weapon-R and Fujita are available used right now. Since I'm cheap those are my options. (If buying new, I'd probably opt for the AFE.)

I just read a thread though in the scikotics forum that says intakes on our Scions are strictly cosmetic. They provide gains in hp for a while, but then out engine management system learns that something is different and adjusts itself accordingly so the engine runs like it did with the stock intake.

If true, I don't know that I want to spend the money on one. :confused:
A SRI or CAI is ***STRICTLY COSMETIC***. You will get no performance gains, and more than likely you will lose low end HP and torque. The pedal only will feel more responsive because you are able to get air to reach the throttle body FASTER. For increased performance, you would need to tune it. If you gain ANYTHING, it would be top end (read: 80 mph+) when the function of the CAI and SRI outpreform the DESIGN capabilities of the stock airbox.

Hopes this clears things up.. Oh, and I have a custom SRI. SRI for the turbo (which I have a Cobb pipe to insure accurate MAF readings.
I've heard both, but no real evidence to back it up (at least not to me).
I'd love to know if it is fact or just rumor.
Also, just one part of an exhaust doesn't make a significant change regardless, unless that part is a turbo (which is actually a major collection of parts really). An intake, header, and high-flow exhaust (making everything clean flow except the scuba tank), theoretically should work together to make a better breathing engine. Now, I've never seen that on a long term dyno run set either to confirm a long-term change, either.
But, it does sound cool to the ear . . .

For real power increases, you need some forced induction, like a turbo. Which, also, often reduces engine life (sometimes to very short), esp. if not ideally tuned.
 

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Discussion Starter · #12 ·
I've heard both, but no real evidence to back it up (at least not to me).
I'd love to know if it is fact or just rumor.
Also, just one part of an exhaust doesn't make a significant change regardless, unless that part is a turbo (which is actually a major collection of parts really). An intake, header, and high-flow exhaust (making everything clean flow except the scuba tank), theoretically should work together to make a better breathing engine. Now, I've never seen that on a long term dyno run set either to confirm a long-term change, either.
But, it does sound cool to the ear . . .

For real power increases, you need some forced induction, like a turbo. Which, also, often reduces engine life (sometimes to very short), esp. if not ideally tuned.
I'm not looking for REAL power. I read a cai gives you 5-10 hp and maybe a few mpg extra and a little bit of sound when you wind it up. I was willing to part with $100 or so for that. ...and they do look nice. :)

I can't find the post again at scikotics to link to. The poster had a few links to web articles supporting the claim that the computer will adjust to cancel any benefits of the intake. Since Scion sells a cai, it might be interesting to find out what they have to say about it. I'll try to search around when I have some time.
 

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I'm telling you right now no CAI or SRI will give you 5-10 hp. That's just a marketing strategy. The most you will get honestly is 2 or 3.
 

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Well that just contradicts everything I've read about the computer being able to adjust for the CAI and "tune" itself fairly well over time. Those people need to post in here.

No, it doesn't contradict anything. Sorry, I should have been more clear. The computer DOES adjust for the CAI or SRI (increase in air flow).. But, the only way to really increase your low end HP or Torque, is running slightly leaner than normal. At first, the increase in air will cause your engine to run a little leaner as the ECU adjusts to the increase (which, may cause a slight increase in HP or TQ), but as the ECU adjusts more and more (within 100 - 300 miles), it'll start adding more fuel to the mixture, which brings it back to the 14.7 stoichiometric reading. So yes, the ECU does tune itself over time, but only tunes itself "back" to the equivalent of how it was.

But, what I was explaining earlier was that the stock air-box isn't designed to continuously apply the required amount of air at higher speeds because normal drivers wouldn't reach 80+ MPH normally. BUT, with a CAI or SRI, you free up a little of that design problem and allow the engine to "reach" a little more air in the higher MPH ranges, which will increase HP/TQ (adding more air, making it run a little leaner).

Also, performance gains also have a lot to do with temperature. I know with forced induction, I see a WORLD of difference when it's 75 degrees out, compared to 83 and humid. I mean, it's like night and day. A CAI escapes the area of direct heat from the engine which will allow you to reach colder (read: more dense) air (which also causes your engine to run LEANER, which equates to more HP/TQ and higher responsiveness).

Hope this helps a little.
 

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I'm not looking for REAL power. I read a cai gives you 5-10 hp and maybe a few mpg extra and a little bit of sound when you wind it up. I was willing to part with $100 or so for that. ...and they do look nice. :)

I can't find the post again at scikotics to link to. The poster had a few links to web articles supporting the claim that the computer will adjust to cancel any benefits of the intake. Since Scion sells a cai, it might be interesting to find out what they have to say about it. I'll try to search around when I have some time.

The bold part is incorrect. Actually, as your ECU "adjusts" to the increase in air flow, it'll add a little more fuel, lowering your MPG depending on how you drive. In relation to performance aspects, if you're running LEANER because of an increase of air rather than fuel, you will still be using the same amount of fuel.

Here's a general rule: More power, less MPG.
 

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I'm telling you right now no CAI or SRI will give you 5-10 hp. That's just a marketing strategy. The most you will get honestly is 2 or 3.

I can get a dyno to read 5-10 HP more when I bolt on a SRI or CAI intake too. Change the input numbers.

The ONLY REASON a CAI will cause an increase in performance is IF IT GETS COLDER AIR in relation to the stock air-box. This causes a leaner mixture because of the DENSE air (hot air rises, cold air sinks because it's more dense), which increases low end HP/TQ slightly. ECU's will not tune for slight adjustments in temperature as it is constantly changing.
 

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I can get a dyno to read 5-10 HP more when I bolt on a SRI or CAI intake too. Change the input numbers.

The ONLY REASON a CAI will cause an increase in performance is IF IT GETS COLDER AIR in relation to the stock air-box. This causes a leaner mixture because of the DENSE air (hot air rises, cold air sinks because it's more dense), which increases low end HP/TQ slightly. ECU's will not tune for slight adjustments in temperature as it is constantly changing.
This is very true, but at the same time you have to remember that they get those numbers in the company's testing facility. The car is in a normal room temperature environment with a huge fan blowing in front of it. It's different when on the road.
 

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This is very true, but at the same time you have to remember that they get those numbers in the company's testing facility. The car is in a normal room temperature environment with a huge fan blowing in front of it. It's different when on the road.
Yeah, that is exactly what I was referring to. But, also, a lot of those graphs are altered in many ways.
 

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Discussion Starter · #19 ·
Thanks for all of the posts. Education and sharing are what this site is all about!

Though rj, when you bolded "a few extra mpg" you forgot to bold "they do look nice" lol :p
 
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