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Custom tune + custom SRI vs OEM intake box = interesting findings

 
Old Aug 4, 2010, 11:16 AM
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Post Custom tune + custom SRI vs OEM intake box = interesting findings

I decided to prep my car for GST's V2 baseflash a couple days ago by swapping my custom SRI (Evo X MAF air flow tube + AEM dryflow filter) for the OEM intake box w/ my K&N panel filter. Keep in mind that I am running a custom tune based on GST's 91 Oct V1 baseflash w/ Boost Pill.

After swapping, I noticed the following things:

1. Acceleration seems to be more responsive.
2. The TC-SST isn't as notchy in 1st - 3rd gears at speeds less than 25 MPH.
3. Engine noise is significantly reduced. Which I expected anyway.
4. Fuel economy has lowered slightly.

Overall, the car actually "feels" better than it did by switching back to the OEM airbox using the K&N panel filter versus how it "felt" using the custom SRI.

Am I going crazy or is something like this expected?

I also wonder if my conical air filter choice has something to do with these results as well. Maybe the AEM dryflow is more restrictive than a K&N filter of the same type.

Any thoughts?
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Old Aug 4, 2010, 11:35 AM
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who did this "custom" tune?
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Old Aug 4, 2010, 11:38 AM
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a local tuner
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Old Aug 4, 2010, 12:33 PM
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The thing about the short ram intake is that you have to keep that filter clean constantly or it will reduce performance badly. Atleast it does for me. I have the K&N.
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Old Aug 4, 2010, 01:13 PM
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Any conical type filter flows better than a panel, it would have to be very severly plugged up with gods knows what for you to actually notice a performance drop. I have always thought that the OEM intake setup on our cars is going to perform better than any SRI. Its placement and snorkel are great for pulling in air and if you throw a higher CFM panel in there, it will flow even better. Maybe I am wrong, I just never saw the point in getting a SRI, its just sucking up super hot air. That doesnt mean the OEM intake is a CAI type of setup by any means and you are still going to get hot air, but nearly as hot as the SRI.
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Old Aug 4, 2010, 01:45 PM
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i just did the exact same switch over the weekend.. (no tune tho)

HKS Filter + OEM box gave me a smile =)
Greddy Airinx custom intake (with velocity stack) is just a lil too annoying for daily driving.. - anyone wants this, it's up for sell
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Old Aug 4, 2010, 02:33 PM
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Originally Posted by initial_d2k View Post
i just did the exact same switch over the weekend.. (no tune tho)

HKS Filter + OEM box gave me a smile =)
Greddy Airinx custom intake (with velocity stack) is just a lil too annoying for daily driving.. - anyone wants this, it's up for sell
I'm glad I am not the only person noticing this.
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Old Aug 4, 2010, 03:11 PM
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I would say its alot of improvement for DD.
when i had the custom intake, it was so loud that i wouldnt step beyond 2800 rpm ..

now i can step to 4000, still feeling the same power and also can hear my music..

i have to admit the Greddy custom intake was the mod i love the most (the sound of the Type RS) and also the one i hate the most (the sound of everything else)

Originally Posted by Psycho09RA View Post
I'm glad I am not the only person noticing this.
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Old Aug 4, 2010, 06:13 PM
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Originally Posted by Psycho09RA View Post
I decided to prep my car for GST's V2 baseflash a couple days ago by swapping my custom SRI (Evo X MAF air flow tube + AEM dryflow filter) for the OEM intake box w/ my K&N panel filter. Keep in mind that I am running a custom tune based on GST's 91 Oct V1 baseflash w/ Boost Pill.

After swapping, I noticed the following things:

1. Acceleration seems to be more responsive.
2. The TC-SST isn't as notchy in 1st - 3rd gears at speeds less than 25 MPH.
3. Engine noise is significantly reduced. Which I expected anyway.
4. Fuel economy has lowered slightly.

Overall, the car actually "feels" better than it did by switching back to the OEM airbox using the K&N panel filter versus how it "felt" using the custom SRI.

Am I going crazy or is something like this expected?

I also wonder if my conical air filter choice has something to do with these results as well. Maybe the AEM dryflow is more restrictive than a K&N filter of the same type.

Any thoughts?
My custom tune was also done using the GST basemap as a starting point like you did, but I kept my stock intake and I have had ZERO problems with the car and it runs like a beast day-in and day-out....
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Old Feb 8, 2011, 04:23 PM
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Exclamation decision made.....

thanks guys for inputs help me decide.....
I'm going K&N FTW
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Old Feb 8, 2011, 05:17 PM
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I also have the K&N drop in filter. I have been very happy with it.
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Old Feb 8, 2011, 05:44 PM
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Do you guys oil the K&N filters? I read that our cars need dry filters...
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Old Feb 8, 2011, 06:35 PM
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Originally Posted by Skym View Post
Do you guys oil the K&N filters? I read that our cars need dry filters...
The only time you will need to oil the K&N drop-in is to "recharge" it after you clean it. K&N sells a recharge kit to use to clean it. Just don't put too much oil on it when you "recharge" it.
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Old Feb 8, 2011, 07:12 PM
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Originally Posted by Psycho09RA View Post
Just don't put too much oil on it when you "recharge" it.
And how do you know if you "put too much oil on it" you ask? Well, if you turn the heat on in the car and have oil shooting out of your dashboard vents, then yep, you put on too much.... This is why I don't like oiled filters....
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Old Feb 9, 2011, 06:14 AM
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^

How much oil did you put on it? LOL
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