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Go Back   IWSTI.com: Subaru WRX STI Forums > IWSTI Engine & Drivetrain > 2.5 Liter/Litre Factory Motor


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Old 02-13-2008, 07:23 PM   #16
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Default Re: Short Ram Intake FTL!!!

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Originally Posted by Hitman83 View Post
The only benefit I see to a shortram is a more consistent IAT year round. For example I have an IAT of around 70-80 during the winter and an IAT of 100-110 during the summer. So the max delta T here is say 40degrees that the tune needs to compensate for. With a CAI I'd be looking at a deltaT of 100degrees or so. There's no argument that it leaves power on the table but I can say I've never overboosted during the cold even when below zero outside. Having said that, I'm still going to switch to a CAI. just pointing out a possible benefit that people may overlook.
Sure, maybe you see less cold thus less overboost. But think of the heat in the summer. With the stock intake Ive seen IATs of > 185 degrees (stationary of course). I can only imagine what it would go up to with a short-ram.

Another thing to remember. The ECU (07 anyway and I would think every year) has a compensation to WG based on intake temperature. Basically, the colder it gets, the less WG the turbo uses. Because of this, I rarely have noticeable deviation from the boost I expect to see.


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Old 02-14-2008, 12:09 PM   #17
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Default Re: Short Ram Intake FTL!!!

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Originally Posted by Rootus View Post
My car made more power with a K&N short ram than without. And enough to feel very slightly on the road, although only at high RPM. If you notice a big loss when you install an intake, then you probably got the wrong one or installed it incorrectly.

Well thats good for you than

I live in texas though, where its hot even in winter. This morning I wore shorts, sandals, an a t shirt to school and felt hot in class and no im not fat

Here in austin it's 76 degree's out and its not even the warmest day

I think because the AEM does not use the factory snorkle for air from the front, lacks a heatshield, and is also located farther away from the fender where the cold air is, It would just heat soak instantly. Thus causing my terrible loss in power
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Old 02-14-2008, 03:20 PM   #18
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Default Re: Short Ram Intake FTL!!!

I was wondering if you get your car protuned with a short ram intake will you still benifit from it or will you suffer the same heat stroke as with the stock tune? Anyone with a protune with the spt?
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Old 02-14-2008, 05:58 PM   #19
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Default Re: Short Ram Intake FTL!!!

I have a protune with the SPT and it definately heat soaks in the summer. I'll be switching to a CAI before my next tune.
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Old 02-14-2008, 06:08 PM   #20
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Default Re: Short Ram Intake FTL!!!

I don't consider the snorkel delete to be the same thing as the intake silencer delete.
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Old 02-14-2008, 06:08 PM   #21
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Default Re: Short Ram Intake FTL!!!

I have the TXS SRI and only get heatsoak when sitting in traffic. But I'm so used to it now I bet I get more than I think. Then again, I am tuned for it, so that makes a difference too. But looking back, I would have gone with a CAI instead. You live and you learn..
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Old 02-14-2008, 06:16 PM   #22
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Default Re: Short Ram Intake FTL!!!

i got my cobb sri, i havent noticed any effect in performance. of course its gonna get heatsoaked, but a cold air intake is going to get heat soaked too. and my tq is still there, though i am only stage 1 cobb, i noticed no difference after b4 and after the cobb intake.
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Old 02-14-2008, 06:46 PM   #23
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Default Re: Short Ram Intake FTL!!!

you can't tune out heat soak. It is what it is and will happen with every short ram. The only way to hide it would be to detune the car to a point where you wouldn't notice the power loss when heat soaked, ie low timing and or boost.
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Old 02-15-2008, 06:19 AM   #24
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Default Re: Short Ram Intake FTL!!!

I'm happy with my Perrin SRI. I heat wrapped turbo, downpipe etc. I got the SPT intake heat shield and got tuned. Nada de problema
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Old 02-19-2008, 05:57 PM   #25
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Default Another Ex-SRI user chips in.

I had the SPT intake with heat sheild for a few months, it came on the car, and I liked it... But logging IAT's well into the 100's with the car pulling timing and going slow until I rode around at 40 MPH or so for 5 minutes was kind of a bummer.

I upgraded to an APS 65mm CAI, and what a world of difference. It pulls in hot air while idling in traffic, almost as bad as the SPT did. The big difference is it takes literaly seconds for the IAT to start dropping once I get moving, as opposed to minutes with the SPT. The SPT would drop to about 15 degrees above outside temp, the APS drops to around 5.

I didn't have anything against the SPT intake, but I'm glad it's keeping dustt from settling on the shelf in the garage at this point. I was dreading another toasty FL summer of hot air from under the hood.

The only gripes I have with the APS unit is having to partially disassemble the fender liner to get to the element and to do the install. It was nice to just be able to get to the SPT, no problem.




Now, about that heatsoaked top mount...
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Old 02-19-2008, 06:06 PM   #26
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Default Re: Short Ram Intake FTL!!!

another victim of subaru's misleading literature. I'm so glad I found this forum on time and everybody was like SPT intake= noooooooooo
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Old 02-19-2008, 06:58 PM   #27
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Default Re: Short Ram Intake FTL!!!

good thing there are threads like this for everyone to be informed. it took me more than 9 months to decide which parts to order etc. So far I have no regrets whatsoever. I'm using Crawford from CAI, turbo all the way to exhaust tip, i'm really happy with their products.
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Old 03-03-2008, 04:24 PM   #28
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Default Re: Short Ram Intake FTL!!!

get tuned and then you'll see power
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Old 03-03-2008, 04:41 PM   #29
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Default Re: Short Ram Intake FTL!!!

Before ever knowing about this site I had a 06 Wrx "Check journal to see what happened to it" and the Dealership guys told me to buy an Injen CAI And a Turbo Xs Bov from them that it would make the car faster. Using my expanded NA knowledge on a FI engine I figured it would be nice...

2 Years later + wrx death + Iwst + 04 Sexy Sti had shown me that intakes in an stock turbo are like wasting money under body neon lights. And the dude that told me to buy the intake is a "reputable tuner" to the eyes of some people

My Wrx was my first turbo car at and i was 17. I learned a lot from it till we had to part with it. Now I have my Sti and I know when to LoL at BOV ppl


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