A Problem with CAI/SRIs and an Alternative (yes, finally) - Page 66

RallyB · 09-21-2012, 11:29 PM

Guess i'll give purolator a try, used to use those but obviously was stupid and went to a k&n, and yeah considering i prob won't use my SRI again now i'll just cut the tube to attempt replacing the accordion. Honestly never should have went for a SRI, live and learn i guess. But i'm already running delta cams and a straight pipe into a invidia cat-back so my hp is quite nice for a 2.5i. I'm not big on speed so i'm fine where i'm at

* Registered users of the site do not see these ads.

Soul Shinobi · 09-21-2012, 11:37 PM

I'd keep the stock intake pipe intact as a backup, working with those cheap aftermarket parts is easier than messing with plastic anyway. Not a bad setup (as much as I'd like to talk you into a high flow car over removing them). Practicing good shift technique certainly makes the car feel faster too. My philosophy is essentially technique over hardware anyway.

Steve2.5i · 09-21-2012, 11:41 PM

Now lock the tread. I'm so over reading the same questions day in n day out.

RallyB · 09-21-2012, 11:41 PM

Will do, i won't mess with the plastic. What i will do is cut up the cheap aluminum 3" tubing from the SRI to take place of the accordion. and yeah i would go high flow but i've had enough headaches and spent enough money getting where i am now haha. But i completely agree, hp doesn't make u a better driver

Soul Shinobi · 09-21-2012, 11:44 PM

I feel like I've accomplished something despite this thread being Groundhog Day. Williaty plays the part of Bill Murray, of course.

RallyB · 09-21-2012, 11:46 PM

u basically helped a lost soul in need, last thing i need to do is research this k&n business. i mean i'm taking your word for it but its so interesting to me that i have to look into it more. half the kids at my college run k&n, man do i have bad news for them and their engines

williaty · 09-22-2012, 12:16 AM

Quote:

Originally Posted by RallyB

how about an AEM dryflow?

AEM is one of the companies licensing the Donaldson nanofiber media for their Dryflow line. That means it's a good filter.

Quote:

Originally Posted by Soul Shinobi

I feel like I've accomplished something despite this thread being Groundhog Day. Williaty plays the part of Bill Murray, of course.

There was a scene in Groundhog Day where Bill Murry was repeatedly stabbed in the eye with a blunt spoon by every new person who joined the town?

RallyB · 09-22-2012, 12:17 AM

got it, only problem is so far i cant find their Dryflow in a panel filter for my 2007, GRRRRRRRRRRRRR

williaty · 09-22-2012, 12:21 AM

Amsoil EaA and aFe ProDry are also the same filter media.

spyrule · 10-02-2012, 09:00 PM

ok question :

I recently got a Injen CAI for my car (have not installed it yet, due to this thread, but it was uber cheap used), however this CAI has it's own location for the MAF sensor.

Should I cut that out and attach directly to the stock MAF connection, or cut below the aftermarket MAF connection and connect that to the filterbox (having removed the stock MAF location) ?

Is there any real difference, or am I worrying about nothing here... I'm just thinking location on the CAI could make for different readings ?

This is basically what mine looks like, only on mine, the the filter is attached where the second elbow is attached.

Any suggestions/recommendations are welcome.

Also, quick question Williaty, what software are you using to record your data with? (romraider?)

williaty · 10-02-2012, 09:02 PM

The Injen CAI and SRI are already documented to be just about the worst offenders on the market for this problem.

Sell the intake, buy one off ebay to cut up, spend your huge profit on strippers and blow.

spyrule · 10-02-2012, 09:05 PM

I don't care about cutting this one up, I got it for $25!

so, remove their MAF location, and stick with the stock MAF connector?

I have the second piece, so I can use it to fill the space difference.

Soul Shinobi · 10-02-2012, 09:06 PM

Yeah I'd leave the stock MAF housing in the stock location just after the airbox.

spyrule · 10-02-2012, 09:07 PM

ok, that's what I thought.

Claybay · 10-03-2012, 07:24 AM

Okay, so just installed the cosmo racing cai. Wow you guys are right. No low end power at all, actually worse than stock! Now to hack it up into a hybrid. Should have just listened to willity!

Soul Shinobi · 10-03-2012, 08:42 AM

Quote:

Originally Posted by Claybay

Should have just listened to williaty!

/THREAD

I know my doing this sort of thing isn't really constructive, I just find it entertaining.

amalik · 10-12-2012, 11:33 AM

taking my ride in to a tuner this wknd ...gonna c if i can get a custom cai. will update...

Soul Shinobi · 10-12-2012, 12:10 PM

I HAVE A POTENTIALLY LEGITIMATE QUESTION
god help me if this has already been asked:

Q: How would having cams affect the location in the rev range and severity of the resonance?

I know it's hard to speculate on and depends on the cam grind I'm sure, but is there anyone with cams that can log data without a snorkus like in the first post to see?

williaty · 10-12-2012, 02:53 PM

Quote:

Originally Posted by Soul Shinobi

I HAVE A POTENTIALLY LEGITIMATE QUESTION
god help me if this has already been asked:

Q: How would having cams affect the location in the rev range and severity of the resonance?

I know it's hard to speculate on and depends on the cam grind I'm sure, but is there anyone with cams that can log data without a snorkus like in the first post to see?

Really? You have to ask if I've ever had cams?

I've had several different cams in this car and they seem to have no effect on the resonance. Which makes sense given that they don't change the frequency any.

Soul Shinobi · 10-12-2012, 02:57 PM

Interesting. So am I right to say that the resonance has to do with air velocity over the valves and the intake track shape, not valve timing or duration?

williaty · 10-12-2012, 03:02 PM

Quote:

Originally Posted by Soul Shinobi

Interesting. So am I right to say that the resonance has to do with air velocity over the valves and the intake track shape, not valve timing or duration?

Nope. It has to do with the stopping and starting of the airflow, the frequency of which is dependent only on engine speed. The cams can only shift the duty cycle of the wave, not the fundamental.

Soul Shinobi · 10-12-2012, 03:35 PM

Yep, definitely need a diagram.

Bubakanush · 10-24-2012, 03:12 PM

Finally read through the ENTIRE thread. What a great sticky, thanks for all the information posted. I now will have something to do on my car when I go home for winter break. However, I see that a lot of people got their SRI's to be chopped up for this hybrid mod on eBay for like $30-40 and I cannot find any for under $100ish.. Even the Cosmo SRI on their site is $95- a bit too high to just cut up. So My question is, did most of the SRI sellers on eBay stop listing them for so cheap or what?

BlobEyeRS · 10-27-2012, 11:12 AM

My version - 304 stainless

Starting out...

FIN

Soul Shinobi · 10-27-2012, 11:15 AM

Oh you fancy huh?

Nice, thanks for sharing.

Looks good, so long as those couplers have enough flex (have someone start it and tweak the throttle aggressively while you watch). Don't want to put too much stress on the plastic MAF housing, if in doubt cut the pipe shorter there and use a longer coupler.

EDIT: Can you estimate the total angle of the bend?

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09-21-2012, 11:29 PM	#1626
RallyB Scooby Newbie Member#: 294247 Join Date: Sep 2011 Location: Pennsylvania Vehicle: 2007 Impreza Urban Metallic Grey	Guess i'll give purolator a try, used to use those but obviously was stupid and went to a k&n, and yeah considering i prob won't use my SRI again now i'll just cut the tube to attempt replacing the accordion. Honestly never should have went for a SRI, live and learn i guess. But i'm already running delta cams and a straight pipe into a invidia cat-back so my hp is quite nice for a 2.5i. I'm not big on speed so i'm fine where i'm at * Registered users of the site do not see these ads.

09-21-2012, 11:37 PM	#1627
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	I'd keep the stock intake pipe intact as a backup, working with those cheap aftermarket parts is easier than messing with plastic anyway. Not a bad setup (as much as I'd like to talk you into a high flow car over removing them). Practicing good shift technique certainly makes the car feel faster too. My philosophy is essentially technique over hardware anyway.

09-21-2012, 11:41 PM	#1628
Steve2.5i Scooby Newbie Member#: 293006 Join Date: Aug 2011 Chapter/Region: SCIC Location: San Diego Vehicle: 2010 Impreza 2.5i Newport Blue	Now lock the tread. I'm so over reading the same questions day in n day out.

09-21-2012, 11:41 PM	#1629
RallyB Scooby Newbie Member#: 294247 Join Date: Sep 2011 Location: Pennsylvania Vehicle: 2007 Impreza Urban Metallic Grey	Will do, i won't mess with the plastic. What i will do is cut up the cheap aluminum 3" tubing from the SRI to take place of the accordion. and yeah i would go high flow but i've had enough headaches and spent enough money getting where i am now haha. But i completely agree, hp doesn't make u a better driver

09-21-2012, 11:44 PM	#1630
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	I feel like I've accomplished something despite this thread being Groundhog Day. Williaty plays the part of Bill Murray, of course.

09-21-2012, 11:46 PM	#1631
RallyB Scooby Newbie Member#: 294247 Join Date: Sep 2011 Location: Pennsylvania Vehicle: 2007 Impreza Urban Metallic Grey	u basically helped a lost soul in need, last thing i need to do is research this k&n business. i mean i'm taking your word for it but its so interesting to me that i have to look into it more. half the kids at my college run k&n, man do i have bad news for them and their engines

09-22-2012, 12:17 AM	#1633
RallyB Scooby Newbie Member#: 294247 Join Date: Sep 2011 Location: Pennsylvania Vehicle: 2007 Impreza Urban Metallic Grey	got it, only problem is so far i cant find their Dryflow in a panel filter for my 2007, GRRRRRRRRRRRRR

09-22-2012, 12:21 AM	#1634
williaty Scooby Guru Member#: 71092 Join Date: Sep 2004 Chapter/Region: MWSOC Location: Delaware County, Ohio Vehicle: 2005 2.5RS Wagon Regal Blue Pearl	Amsoil EaA and aFe ProDry are also the same filter media.

10-02-2012, 09:00 PM	#1635
spyrule Scooby Newbie Member#: 222703 Join Date: Sep 2009 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2006 Impreza 2.5i Crystal Grey	ok question : I recently got a Injen CAI for my car (have not installed it yet, due to this thread, but it was uber cheap used), however this CAI has it's own location for the MAF sensor. Should I cut that out and attach directly to the stock MAF connection, or cut below the aftermarket MAF connection and connect that to the filterbox (having removed the stock MAF location) ? Is there any real difference, or am I worrying about nothing here... I'm just thinking location on the CAI could make for different readings ? This is basically what mine looks like, only on mine, the the filter is attached where the second elbow is attached. Any suggestions/recommendations are welcome. Also, quick question Williaty, what software are you using to record your data with? (romraider?)

10-02-2012, 09:02 PM	#1636
williaty Scooby Guru Member#: 71092 Join Date: Sep 2004 Chapter/Region: MWSOC Location: Delaware County, Ohio Vehicle: 2005 2.5RS Wagon Regal Blue Pearl	The Injen CAI and SRI are already documented to be just about the worst offenders on the market for this problem. Sell the intake, buy one off ebay to cut up, spend your huge profit on strippers and blow.

10-02-2012, 09:05 PM	#1637
spyrule Scooby Newbie Member#: 222703 Join Date: Sep 2009 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2006 Impreza 2.5i Crystal Grey	I don't care about cutting this one up, I got it for $25! so, remove their MAF location, and stick with the stock MAF connector? I have the second piece, so I can use it to fill the space difference.

10-02-2012, 09:06 PM	#1638
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	Yeah I'd leave the stock MAF housing in the stock location just after the airbox.

10-02-2012, 09:07 PM	#1639
spyrule Scooby Newbie Member#: 222703 Join Date: Sep 2009 Chapter/Region: E. Canada Location: Ottawa, Canada Vehicle: 2006 Impreza 2.5i Crystal Grey	ok, that's what I thought.

10-03-2012, 07:24 AM	#1640
Claybay Scooby Newbie Member#: 301059 Join Date: Nov 2011 Chapter/Region: RMIC Location: Orem, Utah Vehicle: 2008 Impreza silver	Okay, so just installed the cosmo racing cai. Wow you guys are right. No low end power at all, actually worse than stock! Now to hack it up into a hybrid. Should have just listened to willity!

10-12-2012, 11:33 AM	#1642
amalik Scooby Newbie Member#: 311675 Join Date: Feb 2012 Chapter/Region: SCIC Vehicle: 2006 impreza 2.5i cgm	taking my ride in to a tuner this wknd ...gonna c if i can get a custom cai. will update...

10-12-2012, 12:10 PM	#1643
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	I HAVE A POTENTIALLY LEGITIMATE QUESTION god help me if this has already been asked: Q: How would having cams affect the location in the rev range and severity of the resonance? I know it's hard to speculate on and depends on the cam grind I'm sure, but is there anyone with cams that can log data without a snorkus like in the first post to see?

10-12-2012, 02:57 PM	#1645
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	Interesting. So am I right to say that the resonance has to do with air velocity over the valves and the intake track shape, not valve timing or duration?

10-12-2012, 03:35 PM	#1647
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	Yep, definitely need a diagram.

10-24-2012, 03:12 PM	#1648
Bubakanush Scooby Newbie Member#: 209975 Join Date: Apr 2009 Chapter/Region: Tri-State Location: Egg Harbor Twp, South Jersey Vehicle: 2006 Impreza 2.5i SGM	Finally read through the ENTIRE thread. What a great sticky, thanks for all the information posted. I now will have something to do on my car when I go home for winter break. However, I see that a lot of people got their SRI's to be chopped up for this hybrid mod on eBay for like $30-40 and I cannot find any for under $100ish.. Even the Cosmo SRI on their site is $95- a bit too high to just cut up. So My question is, did most of the SRI sellers on eBay stop listing them for so cheap or what?

10-27-2012, 11:12 AM	#1649
BlobEyeRS Scooby Newbie Member#: 336270 Join Date: Oct 2012 Chapter/Region: MWSOC Location: Cuyahoga Falls Vehicle: 2005 Impreza Black	My version - 304 stainless Starting out... FIN

10-27-2012, 11:15 AM	#1650
Soul Shinobi Scooby Newbie Member#: 130759 Join Date: Oct 2006 Chapter/Region: NESIC Location: Nashua, NH, USA Vehicle: 1992 Legacy L Sedan 1998 Legacy L Wagon	Oh you fancy huh? Nice, thanks for sharing. Looks good, so long as those couplers have enough flex (have someone start it and tweak the throttle aggressively while you watch). Don't want to put too much stress on the plastic MAF housing, if in doubt cut the pipe shorter there and use a longer coupler. EDIT: Can you estimate the total angle of the bend?