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Old 03-09-2006, 03:06 PM   #1
innova
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Join Date: Oct 2005
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2005 PDX STi
Aspen White 12.7@110 woot

Talking STi tuning EXPERTS... I need your opinion (PDX tune)

I have a 2005 STi with a 3" catless turboback and a PDX semi-custom tune over a Cobb Stg2 setup.

It runs great! A solid 19psi in 4th and up and is very smooth. Night and day over stock and a good improvement over Cobb's Stg2 OTS map.


I have emailed/called PDX and they have only responded to my question once.


I asked if putting a K&N Typhoon short ram intake would be harmfull to my car's performance (being my primary concern).

They gave me the very vague answer "It will work ""Okay"" with the Typhoon".

What the hell does that mean?

I've seen some good improvements with the KN intake on a stock setup. I'm wondering if it will do the same on my setup.


Thanks!
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Old 03-09-2006, 03:14 PM   #2
edmundu
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Well, if it is similar to their LGT version, then you would be best advised to leave it off until you get tuned for it. On LGT's it has been proven via datalogging to lean out the afr's, by under reporting actual maf flow. On a stocker, that is rich, you can get by, but on a tuned stg2, you have already pulled some fuel out, so further leaning the afr could be bad news.
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Old 03-09-2006, 03:36 PM   #3
drwrx
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I watched a test done with the K&N Typhoon Intake.

Step 1: Run stock STi w/ stock intake on Dyno (dynojet) record whp/torque and AFRs (238/242 w/ AFRs at right around 10.5 to 1)
Step 2: Install K&N Typhoon Intake while car is still on dyno.
Step 3: Run STi on Dyno again record whp/torque and AFRs (250/251 w/ virtually no change in AFRs across the run 10.5 to 1)

There you have it: +12 whp & +9 ftlbs gain, with no change in AFRs and no tune!
I was there, I saw it!

This test was not done by K&N, it was just a guy who wanted to know if it really did what they claimed, and it did.
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Old 03-09-2006, 03:40 PM   #4
parker/slc/gc8fan
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Wow, that sooo looks like evidence to me.

Sorry about the attitude but im getting frustrated with this topic.

Every car reacts differently, you would need to datalog the car to know for sure how an intake system is responding to the tune. Also, "it will work" is a relative term that is open to interperatation.

The car will more than likely be safe (Thanks to the stock ECU's ability), but you just wont know without datalogging it somehow.
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Old 03-09-2006, 04:19 PM   #5
innova
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Assuming that this will lean things out a bit.... is it also safe to assume it will be putting down a bit more power with the typhoon?
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Old 03-10-2006, 11:28 AM   #6
PDXTuning
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The problem with intakes is they require the tune to allow for changes. If you are already running the optimum timing and fueling putting on an intake could alter your tune in such a way that you loose power. The map you are running is designed for a stock intake. What we have seen is the K&N is pretty good, but it is different than stock. You can probably get away with running the new intake if you really want, but the map you have is not designed for it. Our recommendation is to leave the stock intake on the car and enjoy the quality of the tune you have. If a car make more power with a new part on it something must be changing. Either the timing, the AFR, the boost level, or the efficiency. We have seen that the K&N does not have a huge effect on AFRs, but it does have some. That same AFR change is tied into additional timing. If you run an intake you should have a map that matches it. At stage 2 fully tuned we do not see large gains from running an aftermarket intake.

Jarrad
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Old 03-10-2006, 06:10 PM   #7
innova
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Thank you Jarrad!


No intake for me!
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